clang-format

cmake: Only install fmt headers when SPDLOG_FMT_EXTERNAL is not defined.

.gitattributes

@@ -0,0 +1 @@
+* text=false

.gitignore

@@ -34,6 +34,9 @@ build/*
 # Codelite
 .codelite
 
+# KDevelop
+*.kdev4
+
 # .orig files
 *.orig
 
@@ -46,6 +49,7 @@ example/*
 !example/example.sln
 !example/example.vcxproj
 !example/CMakeLists.txt
+!example/meson.build
 !example/multisink.cpp
 !example/jni
 
@@ -66,6 +70,14 @@ install_manifest.txt
 
 # idea
 .idea/
-
-# vscode
-.vscode/
+cmake-build-*/
+*.db
+*.ipch
+*.filters
+*.db-wal
+*.opendb
+*.db-shm
+*.vcxproj
+*.tcl
+*.user
+*.sln

.travis.yml

@@ -2,90 +2,110 @@
 # - Louis Dionne's Hana: https://github.com/ldionne/hana
 # - Paul Fultz II's FIT: https://github.com/pfultz2/Fit
 # - Eric Niebler's range-v3: https://github.com/ericniebler/range-v3
+sudo: required
 language: cpp
 
-# Test matrix:
-# - Build matrix per compiler: C++11/C++14 + Debug/Release
-# - Optionally: AddressSanitizer (ASAN)
-# - Valgrind: all release builds are also tested with valgrind
-# - clang 3.4, 3.5, 3.6, trunk
-#   - Note: 3.4 and trunk are tested with/without ASAN,
-#     the rest is only tested with ASAN=On.
-# - gcc 4.9, 5.0
-#
-matrix:
-  include:
-   
-# Test gcc-4.8: C++11, Build=Debug/Release, ASAN=Off
-    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11 ASAN=Off LIBCXX=Off
-      os: linux
-      addons: &gcc48
+# gcc 4.8
+addons: &gcc48
   apt:
     packages:
       - g++-4.8
-            - valgrind
     sources:
       - ubuntu-toolchain-r-test
 
-    - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11 ASAN=Off LIBCXX=Off
+# gcc 7.0
+addons: &gcc7
+  apt:
+    packages:
+      - g++-7
+    sources:
+      - ubuntu-toolchain-r-test
+
+# Clang 3.5
+addons: &clang35
+  apt:
+    packages:
+      - clang-3.5
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-precise-3.5
+      
+# Clang 7.0
+addons: &clang70
+  apt:
+    packages:
+      - clang-7      
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-trusty-7
+
+
+
+matrix:
+  include:
+    # Test gcc-4.8: C++11, Build=Debug/Release
+    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11
       os: linux
       addons: *gcc48
 
-    # Test gcc-4.9: C++11, Build=Debug/Release, ASAN=Off
-    - env: GCC_VERSION=4.9 BUILD_TYPE=Debug CPP=11 ASAN=Off LIBCXX=Off
+    - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11
       os: linux
-      addons: &gcc49
-        apt:
-          packages:
-            - g++-4.9
-            - valgrind
-          sources:
-            - ubuntu-toolchain-r-test
+      addons: *gcc48
 
-    - env: GCC_VERSION=4.9 BUILD_TYPE=Release CPP=11 ASAN=Off LIBCXX=Off
+    - env: GCC_VERSION=7 BUILD_TYPE=Release CPP=11
       os: linux
-      addons: *gcc49
+      addons: *gcc7
 
-# Install dependencies
-before_install:
-  - export CHECKOUT_PATH=`pwd`;
+    # Test clang-3.5: C++11, Build=Debug/Release
+    - env: CLANG_VERSION=3.5 BUILD_TYPE=Debug CPP=11
+      os: linux
+      addons: *clang35
+
+    - env: CLANG_VERSION=3.5 BUILD_TYPE=Release CPP=11
+      os: linux
+      addons: *clang35
+
+      # Test clang-7.0: C++11, Build=Debug, ASAN=On
+    - env: CLANG_VERSION=7 BUILD_TYPE=Debug CPP=11 ASAN=On TSAN=Off
+      dist: bionic      
+
+    - env: CLANG_VERSION=7 BUILD_TYPE=Release CPP=11 ASAN=On TSAN=Off
+      dist: bionic
+      
+      # osx
+    - env: BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=Off
+      os: osx
+
+
+
+before_script:
   - if [ -n "$GCC_VERSION" ]; then export CXX="g++-${GCC_VERSION}" CC="gcc-${GCC_VERSION}"; fi
   - if [ -n "$CLANG_VERSION" ]; then export CXX="clang++-${CLANG_VERSION}" CC="clang-${CLANG_VERSION}"; fi
-  - if [ "$CLANG_VERSION" == "3.4" ]; then export CXX="/usr/local/clang-3.4/bin/clang++" CC="/usr/local/clang-3.4/bin/clang"; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export CXX="clang++" CC="clang"; fi
   - which $CXX
   - which $CC
-  - which valgrind
-  - if [ -n "$CLANG_VERSION" ]; then sudo CXX=$CXX CC=$CC ./tests/install_libcxx.sh; fi
-
-install:
-  - cd $CHECKOUT_PATH
-
-  # Workaround for valgrind bug: https://bugs.kde.org/show_bug.cgi?id=326469.
-  # It is fixed in valgrind 3.10 so this won't be necessary if someone
-  # replaces the current valgrind (3.7) with valgrind-3.10
-  - sed -i 's/march=native/msse4.2/' example/Makefile
-
-  - if [ ! -d build ]; then mkdir build; fi
-  - export CXX_FLAGS="-I${CHECKOUT_PATH}/include"
-  - export CXX_LINKER_FLAGS=""
-  - if [ -z "$BUILD_TYPE" ]; then export BUILD_TYPE=Release; fi
-  - if [ "$ASAN" == "On"]; then export CXX_FLAGS="${CXX_FLAGS} -fsanitize=address,undefined,integer -fno-omit-frame-pointer -fno-sanitize=unsigned-integer-overflow"; fi
-  - if [ -n "$CLANG_VERSION" ]; then CXX_FLAGS="${CXX_FLAGS} -D__extern_always_inline=inline"; fi
-  - if [ "$LIBCXX" == "On" ]; then CXX_FLAGS="${CXX_FLAGS} -stdlib=libc++ -I/usr/include/c++/v1/"; fi
-  - if [ "$LIBCXX" == "On" ]; then CXX_LINKER_FLAGS="${CXX_FLAGS} -L/usr/lib/ -lc++"; fi
-  - CXX_FLAGS="${CXX_FLAGS} -std=c++${CPP}"
-
-  # Build examples
-  - cd example
-  - if [ "$BUILD_TYPE" == "Release" ]; then make rebuild CXXFLAGS="${CXX_FLAGS} ${CXX_LINKER_FLAGS}" VERBOSE=1; export BIN=example; fi
-  - if [ "$BUILD_TYPE" == "Debug" ]; then make rebuild debug CXXFLAGS="${CXX_FLAGS} ${CXX_LINKER_FLAGS}" VERBOSE=1; export BIN=example-debug; fi
-  
+  - $CXX --version
+  - cmake --version
 
 script:
-  - ./"${BIN}"
-  - valgrind --trace-children=yes --leak-check=full ./"${BIN}"
-  - cd $CHECKOUT_PATH/tests; make rebuild; ./tests
-  - cd $CHECKOUT_PATH/tests; STYLE=printf make rebuild; ./tests
+  - cd ${TRAVIS_BUILD_DIR}
+  - mkdir -p build && cd build
+  - |
+    cmake .. \
+      --warn-uninitialized \
+      -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
+      -DCMAKE_CXX_STANDARD=$CPP \
+      -DSPDLOG_BUILD_EXAMPLE=ON \
+      -DSPDLOG_BUILD_EXAMPLE_HO=ON \
+      -DSPDLOG_BUILD_BENCH=OFF \
+      -DSPDLOG_BUILD_TESTS=ON \
+      -DSPDLOG_BUILD_TESTS_HO=OFf \
+      -DSPDLOG_SANITIZE_ADDRESS=$ASAN 
+      
+  - make VERBOSE=1 -j2
+  - ctest -j2 --output-on-failure
+
+
 
 notifications:
   email: false

CMakeLists.txt

@@ -1,115 +1,223 @@
-#
-# Copyright(c) 2015 Ruslan Baratov.
+# Copyright(c) 2019 spdlog authors
 # Distributed under the MIT License (http://opensource.org/licenses/MIT)
-#
 
-cmake_minimum_required(VERSION 3.1)
-project(spdlog VERSION 0.17.0 LANGUAGES CXX)
-include(CTest)
-include(CMakeDependentOption)
-include(GNUInstallDirs)
+cmake_minimum_required(VERSION 3.2)
 
 #---------------------------------------------------------------------------------------
-# compiler config
+# Start spdlog project
+#---------------------------------------------------------------------------------------
+include(GNUInstallDirs)
+include(cmake/utils.cmake)
+include(cmake/ide.cmake)
+
+spdlog_extract_version()
+
+#---------------------------------------------------------------------------------------
+# Set default build to release
+#---------------------------------------------------------------------------------------
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose Release or Debug" FORCE)
+endif()
+
+project(spdlog VERSION ${SPDLOG_VERSION} LANGUAGES CXX)
+message(STATUS "Build spdlog: ${SPDLOG_VERSION}")
+
+#---------------------------------------------------------------------------------------
+# Compiler config
 #---------------------------------------------------------------------------------------
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
 
-if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-    set(CMAKE_CXX_FLAGS "-Wall -O3 ${CMAKE_CXX_FLAGS}")
+#---------------------------------------------------------------------------------------
+# Set SPDLOG_MASTER_PROJECT to ON if we are building spdlog
+#---------------------------------------------------------------------------------------
+# Check if spdlog is being used directly or via add_subdirectory, but allow overriding
+if (NOT DEFINED SPDLOG_MASTER_PROJECT)
+    if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+        set(SPDLOG_MASTER_PROJECT ON)
+    else()
+        set(SPDLOG_MASTER_PROJECT OFF)
+    endif()
+endif ()
+
+# build shared option
+if(NOT WIN32)
+    option(SPDLOG_BUILD_SHARED "Build shared library" OFF)
 endif()
 
-#---------------------------------------------------------------------------------------
-# spdlog target
-#---------------------------------------------------------------------------------------
-add_library(spdlog INTERFACE)
+# example options
+option(SPDLOG_BUILD_EXAMPLE "Build example" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_EXAMPLE_HO "Build header only example" OFF)
 
-option(SPDLOG_BUILD_EXAMPLES "Build examples" OFF)
-cmake_dependent_option(SPDLOG_BUILD_TESTING
-    "Build spdlog tests" ON
-    "BUILD_TESTING" OFF
-)
+# testing options
+option(SPDLOG_BUILD_TESTS "Build tests" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_TESTS_HO "Build tests using the header only version" OFF)
 
-target_include_directories(
-    spdlog
-    INTERFACE
+# bench options
+option(SPDLOG_BUILD_BENCH "Build benchmarks (Requires https://github.com/google/benchmark.git to be installed)" OFF)
+
+# sanitizer options
+option(SPDLOG_SANITIZE_ADDRESS "Enable address sanitizer in tests" OFF)
+
+# install options
+option(SPDLOG_INSTALL "Generate the install target" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_FMT_EXTERNAL "Use external fmt library instead of bundled" OFF)
+
+if(WIN32)
+	option(SPDLOG_WCHAR_SUPPORT "Support wchar api" OFF)
+endif()
+
+option(SPDLOG_NO_EXCEPTIONS "Compile with -fno-exceptions. Call abort() on any spdlog exceptions" OFF)
+
+
+find_package(Threads REQUIRED)
+
+message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
+
+#---------------------------------------------------------------------------------------
+# Static/Shared library (shared not supported in windows yet)
+#---------------------------------------------------------------------------------------
+set(SPDLOG_SRCS
+        src/spdlog.cpp
+        src/stdout_sinks.cpp
+        src/fmt.cpp
+        src/color_sinks.cpp
+        src/file_sinks.cpp
+        src/async.cpp)
+
+set(SPDLOG_CFLAGS "${PROJECT_NAME}")
+
+if (SPDLOG_BUILD_SHARED)
+    if(WIN32)
+        message(FATAL_ERROR "spdlog shared lib is not yet supported under windows")
+    endif()
+    add_library(spdlog SHARED ${SPDLOG_SRCS} ${SPDLOG_ALL_HEADERS})
+else()
+    add_library(spdlog STATIC ${SPDLOG_SRCS} ${SPDLOG_ALL_HEADERS})
+endif()
+
+add_library(spdlog::spdlog ALIAS spdlog)
+
+target_compile_definitions(spdlog PUBLIC SPDLOG_COMPILED_LIB)
+target_include_directories(spdlog PUBLIC
         "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
-    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
-)
+        "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
+target_link_libraries(spdlog PUBLIC Threads::Threads)
+spdlog_enable_warnings(spdlog)
 
-set(HEADER_BASE "${CMAKE_CURRENT_SOURCE_DIR}/include")
+set_target_properties(spdlog PROPERTIES VERSION ${SPDLOG_VERSION} SOVERSION ${SPDLOG_VERSION_MAJOR})
+set_target_properties(spdlog PROPERTIES DEBUG_POSTFIX d)
 
-if(SPDLOG_BUILD_EXAMPLES)
+#---------------------------------------------------------------------------------------
+# Header only version
+#---------------------------------------------------------------------------------------
+add_library(spdlog_header_only INTERFACE)
+add_library(spdlog::spdlog_header_only ALIAS spdlog_header_only)
+
+target_include_directories(spdlog_header_only INTERFACE
+        "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
+        "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
+target_link_libraries(spdlog_header_only INTERFACE Threads::Threads)
+
+
+#---------------------------------------------------------------------------------------
+# Use fmt package if using exertnal fmt
+#---------------------------------------------------------------------------------------
+if(SPDLOG_FMT_EXTERNAL)
+    if (NOT TARGET fmt::fmt)
+        find_package(fmt REQUIRED)
+    endif ()
+
+    set(SPDLOG_CFLAGS "${SPDLOG_CFLAGS} -DSPDLOG_FMT_EXTERNAL")
+
+    target_compile_definitions(spdlog PUBLIC SPDLOG_FMT_EXTERNAL)
+    target_link_libraries(spdlog PUBLIC fmt::fmt)
+
+    target_compile_definitions(spdlog_header_only INTERFACE SPDLOG_FMT_EXTERNAL)
+    target_link_libraries(spdlog_header_only INTERFACE fmt::fmt)
+endif()
+
+if(SPDLOG_WCHAR_SUPPORT)
+	target_compile_definitions(spdlog PUBLIC SPDLOG_WCHAR_TO_UTF8_SUPPORT)
+	target_compile_definitions(spdlog_header_only INTERFACE SPDLOG_WCHAR_TO_UTF8_SUPPORT)
+ endif()
+
+ if(SPDLOG_NO_EXCEPTIONS)
+	target_compile_definitions(spdlog PUBLIC SPDLOG_NO_EXCEPTIONS)	
+
+	target_compile_definitions(spdlog_header_only INTERFACE SPDLOG_NO_EXCEPTIONS)
+
+    if(NOT MSVC)
+        target_compile_options(spdlog PRIVATE -fno-exceptions)
+    endif()
+endif()
+
+
+#---------------------------------------------------------------------------------------
+# Build binaries
+#---------------------------------------------------------------------------------------
+if(SPDLOG_BUILD_EXAMPLE OR SPDLOG_BUILD_EXAMPLE_HO)
+    message(STATUS "Generating examples")
     add_subdirectory(example)
 endif()
 
-if(SPDLOG_BUILD_TESTING)
+if(SPDLOG_BUILD_TESTS OR SPDLOG_BUILD_TESTS_HO)
+    message(STATUS "Generating tests")
+    enable_testing()
     add_subdirectory(tests)
 endif()
 
+if(SPDLOG_BUILD_BENCH)
+    message(STATUS "Generating benchmarks")
+    add_subdirectory(bench)
+endif()
+
 #---------------------------------------------------------------------------------------
-# Install/export targets and files
+# Install
 #---------------------------------------------------------------------------------------
-# set files and directories
-set(config_install_dir "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
-set(include_install_dir "${CMAKE_INSTALL_INCLUDEDIR}")
-set(pkgconfig_install_dir "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-set(version_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
-set(project_config "${PROJECT_NAME}Config.cmake")
-set(pkg_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}.pc")
-set(targets_export_name "${PROJECT_NAME}Targets")
-set(namespace "${PROJECT_NAME}::")
+if (SPDLOG_INSTALL)
+    message(STATUS "Generating install")
+    set(project_config_in "${CMAKE_CURRENT_LIST_DIR}/cmake/spdlogConfig.cmake.in")
+    set(project_config_out "${CMAKE_CURRENT_BINARY_DIR}/spdlogConfig.cmake")
+    set(config_targets_file "spdlogConfigTargets.cmake")
+    set(version_config_file "${CMAKE_CURRENT_BINARY_DIR}/spdlogConfigVersion.cmake")
+    set(export_dest_dir "${CMAKE_INSTALL_LIBDIR}/spdlog/cmake")
+    set(pkgconfig_install_dir "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+    set(pkg_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}.pc")
 
-# generate package version file
-include(CMakePackageConfigHelpers)
-write_basic_package_version_file(
-    "${version_config}" COMPATIBILITY SameMajorVersion
-)
+    #---------------------------------------------------------------------------------------
+    # Include files
+    #---------------------------------------------------------------------------------------
+    install(DIRECTORY include/ DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}" PATTERN "fmt/bundled" EXCLUDE)
+    install(TARGETS spdlog spdlog_header_only EXPORT spdlog DESTINATION "${CMAKE_INSTALL_LIBDIR}/spdlog")
 
-# configure pkg config file
-configure_file("cmake/spdlog.pc.in" "${pkg_config}" @ONLY)
+    if(NOT SPDLOG_FMT_EXTERNAL)
+        install(DIRECTORY include/${PROJECT_NAME}/fmt/bundled/
+                DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}/fmt/bundled/")
+    endif()
 
-# install targets
-install(
-    TARGETS spdlog
-    EXPORT "${targets_export_name}"
-)
+    #---------------------------------------------------------------------------------------
+    # Package and version files
+    #---------------------------------------------------------------------------------------
+    configure_file("cmake/${PROJECT_NAME}.pc.in" "${pkg_config}" @ONLY)
+    install(FILES "${pkg_config}" DESTINATION "${pkgconfig_install_dir}")
 
-# install headers
-install(
-    DIRECTORY "${HEADER_BASE}/${PROJECT_NAME}"
-    DESTINATION "${include_install_dir}"
-)
+    install(EXPORT spdlog
+            DESTINATION ${export_dest_dir}
+            NAMESPACE spdlog::
+            FILE ${config_targets_file})
 
-# install project version file
-install(
-    FILES "${version_config}"
-    DESTINATION "${config_install_dir}"
-)
+    include(CMakePackageConfigHelpers)
+    configure_file("${project_config_in}" "${project_config_out}" @ONLY)
+    write_basic_package_version_file("${version_config_file}" COMPATIBILITY SameMajorVersion)
+    install(FILES
+            "${project_config_out}"
+            "${version_config_file}" DESTINATION "${export_dest_dir}")
 
-# install pkg config file
-install(
-    FILES "${pkg_config}"
-    DESTINATION "${pkgconfig_install_dir}"
-)
+    #---------------------------------------------------------------------------------------
+    # Support creation of installable packages
+    #---------------------------------------------------------------------------------------
+    include(cmake/spdlogCPack.cmake)
 
-# install project config file
-install(
-    EXPORT "${targets_export_name}"
-    NAMESPACE "${namespace}"
-    DESTINATION "${config_install_dir}"
-    FILE ${project_config}
-)
-
-# export build directory config file
-export(
-    EXPORT ${targets_export_name}
-    NAMESPACE "${namespace}"
-    FILE ${project_config}
-)
-
-# register project in CMake user registry
-export(PACKAGE ${PROJECT_NAME})
-
-file(GLOB_RECURSE spdlog_include_SRCS "${HEADER_BASE}/*.h")
-add_custom_target(spdlog_headers_for_ide SOURCES ${spdlog_include_SRCS})
+endif ()

INSTALL

@@ -1,13 +1,24 @@
-spdlog is header only library.
-Just copy the files to your build tree and use a C++11 compiler
+Header only version:
+==================================================================
+Just copy the files to your build tree and use a C++11 compiler.
+Or use CMake:
+  add_executable(example_header_only example.cpp)
+  target_link_libraries(example_header_only spdlog::spdlog_header_only)
+
+
+Compiled library version:
+==================================================================
+CMake:
+  add_executable(example example.cpp)
+  target_link_libraries(example spdlog::spdlog)
+
+Or copy src/spdlog.cpp to your build tree and pass the -DSPDLOG_COMPILED_LIB to the compiler.
 
 Tested on:
 gcc 4.8.1 and above
 clang 3.5
 Visual Studio 2013
 
-gcc 4.8 flags: --std==c++11 -pthread -O3 -flto -Wl,--no-as-needed
-gcc 4.9 flags: --std=c++11 -pthread -O3 -flto
 
 
-see the makefile in the example folder
+

README.md

@@ -1,16 +1,29 @@
 # spdlog
 
-Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=master)](https://travis-ci.org/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog)
+Very fast, header-only/compiled, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=master)](https://travis-ci.org/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog)
+
 
 
 ## Install 
-#### Just copy the headers:
+#### Header only version
+Copy the source [folder](https://github.com/gabime/spdlog/tree/v1.x/include/spdlog) to your build tree and use a C++11 compiler.
 
-* Copy the source [folder](https://github.com/gabime/spdlog/tree/master/include/spdlog) to your build tree and use a C++11 compiler.
+#### Static lib version (recommended - much faster compile times, v1.4.0)
+```console
+$ git clone https://github.com/gabime/spdlog.git
+$ cd spdlog && mkdir build && cd build
+$ cmake .. && make -j
+```
       
-#### Or use your favorite package manager:
+   see example [CMakeLists.txt](https://github.com/gabime/spdlog/blob/v1.x/example/CMakeLists.txt) on how to use.
 
-* Ubuntu: `apt-get install libspdlog-dev`
+## Platforms
+ * Linux, FreeBSD, OpenBSD, Solaris, AIX
+ * Windows (msvc 2013+, cygwin)
+ * macOS (clang 3.5+)
+ * Android
+
+## Package managers:
 * Homebrew: `brew install spdlog`
 * FreeBSD:  `cd /usr/ports/devel/spdlog/ && make install clean`
 * Fedora: `yum install spdlog`
@@ -18,21 +31,13 @@ Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.
 * Arch Linux: `yaourt -S spdlog-git`
 * vcpkg: `vcpkg install spdlog`
 
-
-## Platforms
- * Linux, FreeBSD, Solaris
- * Windows (vc 2013+, cygwin)
- * Mac OSX (clang 3.5+)
- * Android
-
 ## Features
-* Very fast - performance is the primary goal (see [benchmarks](#benchmarks) below).
-* Headers only, just copy and use.
-* Feature rich [call style](#usage-example) using the excellent [fmt](https://github.com/fmtlib/fmt) library.
-* Optional printf syntax support.
-* Asynchronous mode (optional)
+* Very fast (see [benchmarks](#benchmarks) below).
+* Headers only, just copy and use. Or use as a compiled library.
+* Feature rich formatting, using the excellent [fmt](https://github.com/fmtlib/fmt) library.
+* **New!** [Backtrace](#backtrace-support) support - store debug or other messages in a ring buffer and display later on demand.
+* Fast asynchronous mode (optional)
 * [Custom](https://github.com/gabime/spdlog/wiki/3.-Custom-formatting) formatting.
-* Conditional Logging
 * Multi/Single threaded loggers.
 * Various log targets:
     * Rotating log files.
@@ -44,177 +49,307 @@ Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.
 * Severity based filtering - threshold levels can be modified in runtime as well as in compile time.
 
  
+## Usage samples
 
-## Benchmarks
-
-Below are some [benchmarks](bench) comparing popular log libraries under Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz
-
-#### Synchronous mode
-Time needed to log 1,000,000 lines in synchronous mode (in seconds, the best of 3 runs):
-
-|threads|boost log 1.54|glog   |easylogging |spdlog|
-|-------|:-------:|:-----:|----------:|------:|
-|1|       4.169s  |1.066s |0.975s     |0.392s|
-|10|     6.180s   |3.032s |2.857s     |0.773s|
-|100|     5.981s  |1.139s |4.512s     |0.587s|
-
-
-#### Asynchronous mode
-Time needed to log 1,000,000 lines in asynchronous mode, i.e. the time it takes to put them in the async queue (in seconds, the best of 3 runs):
-
-|threads|g2log <sup>async logger</sup>   |spdlog <sup>async mode</sup>|
-|:-------|:-----:|-------------------------:|
-|1|       1.850s |0.39s |
-|10|      0.943s  |0.416s|
-|100|      0.959s |0.413s|
-
-
-
-
-## Usage Example
+#### Basic usage
 ```c++
-
 #include "spdlog/spdlog.h"
+#include "spdlog/sinks/basic_file_sink.h"
 
-#include <iostream>
-#include <memory>
+int main() 
+{
+    spdlog::info("Welcome to spdlog!");
+    spdlog::error("Some error message with arg: {}", 1);
     
-void async_example();
-void syslog_example();
-void user_defined_example();
-void err_handler_example();
+    spdlog::warn("Easy padding in numbers like {:08d}", 12);
+    spdlog::critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+    spdlog::info("Support for floats {:03.2f}", 1.23456);
+    spdlog::info("Positional args are {1} {0}..", "too", "supported");
+    spdlog::info("{:<30}", "left aligned");
     
-namespace spd = spdlog;
-int main(int, char*[])
+    spdlog::set_level(spdlog::level::debug); // Set global log level to debug
+    spdlog::debug("This message should be displayed..");    
+    
+    // change log pattern
+    spdlog::set_pattern("[%H:%M:%S %z] [%n] [%^---%L---%$] [thread %t] %v");
+    
+    // Compile time log levels
+    // define SPDLOG_ACTIVE_LEVEL to desired level
+    SPDLOG_TRACE("Some trace message with param {}", {});
+    SPDLOG_DEBUG("Some debug message");
+    
+    // Set the default logger to file logger
+    auto file_logger = spdlog::basic_logger_mt("basic_logger", "logs/basic.txt");
+    spdlog::set_default_logger(file_logger);            
+}
+```
+#### create stdout/stderr logger object
+```c++
+#include "spdlog/spdlog.h"
+#include "spdlog/sinks/stdout_color_sinks.h"
+void stdout_example()
+{
+    // create color multi threaded logger
+    auto console = spdlog::stdout_color_mt("console");    
+    auto err_logger = spdlog::stderr_color_mt("stderr");    
+    spdlog::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name)");
+}
+```
+---
+#### Basic file logger
+```c++
+#include "spdlog/sinks/basic_file_sink.h"
+void basic_logfile_example()
 {
     try 
     {
-        // Console logger with color
-        auto console = spd::stdout_color_mt("console");
-        console->info("Welcome to spdlog!");
-        console->error("Some error message with arg{}..", 1);
-	
-        // Formatting examples
-        console->warn("Easy padding in numbers like {:08d}", 12);
-        console->critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
-        console->info("Support for floats {:03.2f}", 1.23456);
-        console->info("Positional args are {1} {0}..", "too", "supported");
-        console->info("{:<30}", "left aligned");
-	
-	// Use global registry to retrieve loggers
-        spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
-        
-        // Create basic file logger (not rotated)
-        auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic.txt");
-        my_logger->info("Some log message");
-
-        // Create a file rotating logger with 5mb size max and 3 rotated files
-        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/mylogfile.txt", 1048576 * 5, 3);
-        for (int i = 0; i < 10; ++i)
-            rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);
-
-        // Create a daily logger - a new file is created every day on 2:30am
-        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
-        // trigger flush if the log severity is error or higher
-        daily_logger->flush_on(spd::level::err);
-        daily_logger->info(123.44);
-
-        // Customize msg format for all messages
-        spd::set_pattern("[%^+++%$] [%H:%M:%S %z] [thread %t] %v");
-        console->info("This an info message with custom format (and custom color range between the '%^' and '%$')");
-	console->error("This an error message with custom format (and custom color range between the '%^' and '%$')");
-
-        // Runtime log levels
-	spd::set_level(spd::level::info); //Set global log level to info
-	console->debug("This message should not be displayed!");
-	console->set_level(spd::level::debug); // Set specific logger's log level
-	console->debug("This message should be displayed..");
-
-        // Compile time log levels
-        // define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON
-        SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
-        SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
-
-        // Asynchronous logging is very fast..
-        // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
-        async_example();
-
-        // syslog example. linux/osx only
-        syslog_example();
-
-        // android example. compile with NDK
-        android_example();
-
-        // Log user-defined types example
-        user_defined_example();
-
-        // Change default log error handler
-        err_handler_example();
-
-        // Apply a function on all registered loggers
-        spd::apply_all([&](std::shared_ptr<spd::logger> l)
-        {
-            l->info("End of example.");
-        });
-
-        // Release and close all loggers
-        spd::drop_all();
+        auto my_logger = spdlog::basic_logger_mt("basic_logger", "logs/basic-log.txt");
     }
-    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
-    catch (const spd::spdlog_ex& ex)
+    catch (const spdlog::spdlog_ex &ex)
     {
         std::cout << "Log init failed: " << ex.what() << std::endl;
-        return 1;
     }
 }
+```
+---
+#### Rotating files
+```c++
+#include "spdlog/sinks/rotating_file_sink.h"
+void rotating_example()
+{
+    // Create a file rotating logger with 5mb size max and 3 rotated files
+    auto rotating_logger = spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
+}
+```
 
+---
+#### Daily files
+```c++
+
+#include "spdlog/sinks/daily_file_sink.h"
+void daily_example()
+{
+    // Create a daily logger - a new file is created every day on 2:30am
+    auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+}
+
+```
+
+---
+#### Backtrace support
+```c++
+// Loggers can store in a ring buffer all messages (including debug/trace) and display later on demand.
+// When needed, call dump_backtrace() to see them
+spdlog::enable_backtrace(32); // create ring buffer with capacity of 32  messages
+// or my_logger->enable_backtrace(32)..
+for(int i = 0; i < 100; i++)
+{
+  spdlog::debug("Backtrace message {}", i); // not logged yet..
+}
+// e.g. if some error happened:
+spdlog::dump_backtrace(); // log them now! show the last 32 messages
+
+// or my_logger->dump_backtrace(32)..
+```
+
+---
+#### Periodic flush
+```c++
+// periodically flush all *registered* loggers every 3 seconds:
+// warning: only use if all your loggers are thread safe!
+spdlog::flush_every(std::chrono::seconds(3));
+
+```
+
+---
+#### Log binary data in hex
+```c++
+// many types of std::container<char> types can be used.
+// ranges are supported too.
+// format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+#include "spdlog/fmt/bin_to_hex.h"
+
+void binary_example()
+{
+    auto console = spdlog::get("console");
+    std::array<char, 80> buf;
+    console->info("Binary example: {}", spdlog::to_hex(buf));
+    console->info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
+    // more examples:
+    // logger->info("uppercase: {:X}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters, no position info: {:Xsp}", spdlog::to_hex(buf));
+}
+
+```
+
+---
+#### Logger with multi sinks - each with different format and log level
+```c++
+
+// create logger with 2 targets with different log levels and formats.
+// the console will show only warnings or errors, while the file will log all.
+void multi_sink_example()
+{
+    auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
+    console_sink->set_level(spdlog::level::warn);
+    console_sink->set_pattern("[multi_sink_example] [%^%l%$] %v");
+
+    auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", true);
+    file_sink->set_level(spdlog::level::trace);
+
+    spdlog::logger logger("multi_sink", {console_sink, file_sink});
+    logger.set_level(spdlog::level::debug);
+    logger.warn("this should appear in both console and file");
+    logger.info("this message should not appear in the console, only in the file");
+}
+```
+
+---
+#### Asynchronous logging
+```c++
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
 void async_example()
 {
-    size_t q_size = 4096; 
-    spd::set_async_mode(q_size);
-    auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
-    for (int i = 0; i < 100; ++i)
-        async_file->info("Async message #{}", i);
+    // default thread pool settings can be modified *before* creating the async logger:
+    // spdlog::init_thread_pool(8192, 1); // queue with 8k items and 1 backing thread.
+    auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
+    // alternatively:
+    // auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");   
 }
 
-//syslog example
-void syslog_example()
+```
+
+---
+#### Asynchronous logger with multi sinks  
+```c++
+#include "spdlog/sinks/stdout_color_sinks.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+void multi_sink_example2()
 {
-#ifdef SPDLOG_ENABLE_SYSLOG 
-    std::string ident = "spdlog-example";
-    auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
-    syslog_logger->warn("This is warning that will end up in syslog..");
-#endif
+    spdlog::init_thread_pool(8192, 1);
+    auto stdout_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt >();
+    auto rotating_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>("mylog.txt", 1024*1024*10, 3);
+    std::vector<spdlog::sink_ptr> sinks {stdout_sink, rotating_sink};
+    auto logger = std::make_shared<spdlog::async_logger>("loggername", sinks.begin(), sinks.end(), spdlog::thread_pool(), spdlog::async_overflow_policy::block);
+    spdlog::register_logger(logger);
 }
+```
  
+---
+#### User defined types
+```c++
 // user defined types logging by implementing operator<<
+#include "spdlog/fmt/ostr.h" // must be included
 struct my_type
 {
     int i;
     template<typename OStream>
-    friend OStream& operator<<(OStream& os, const my_type &c)
+    friend OStream &operator<<(OStream &os, const my_type &c)
     {
-        return os << "[my_type i="<<c.i << "]";
+        return os << "[my_type i=" << c.i << "]";
     }
 };
 
-#include <spdlog/fmt/ostr.h> // must be included
 void user_defined_example()
 {
-    spd::get("console")->info("user defined type: {}", my_type { 14 });
+    spdlog::get("console")->info("user defined type: {}", my_type{14});
 }
 
-//
-//custom error handler
-//
+```
+---
+#### Custom error handler
+```c++
 void err_handler_example()
 {
-	spd::set_error_handler([](const std::string& msg) {
-		std::cerr << "my err handler: " << msg << std::endl;
-	}); 
-	// (or logger->set_error_handler(..) to set for specific logger)
+    // can be set globally or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { spdlog::get("console")->error("*** LOGGER ERROR ***: {}", msg); });
+    spdlog::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
 }
 
+```
+---
+#### syslog 
+```c++
+#include "spdlog/sinks/syslog_sink.h"
+void syslog_example()
+{
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spdlog::syslog_logger_mt("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog.");
+}
+```
+---
+#### Android example 
+```c++
+#include "spdlog/sinks/android_sink.h"
+void android_example()
+{
+    std::string tag = "spdlog-android";
+    auto android_logger = spdlog::android_logger_mt("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
+}
+```
+
+## Benchmarks
+
+Below are some [benchmarks](https://github.com/gabime/spdlog/blob/v1.x/bench/bench.cpp) done in Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz
+
+#### Synchronous mode
+```
+[info] **************************************************************
+[info] Single thread, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_st         Elapsed: 0.17 secs        5,777,626/sec
+[info] rotating_st      Elapsed: 0.18 secs        5,475,894/sec
+[info] daily_st         Elapsed: 0.20 secs        5,062,659/sec
+[info] empty_logger     Elapsed: 0.07 secs       14,127,300/sec
+[info] **************************************************************
+[info] C-string (400 bytes). Single thread, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_st         Elapsed: 0.41 secs        2,412,483/sec
+[info] rotating_st      Elapsed: 0.72 secs        1,389,196/sec
+[info] daily_st         Elapsed: 0.42 secs        2,393,298/sec
+[info] null_st          Elapsed: 0.04 secs       27,446,957/sec
+[info] **************************************************************
+[info] 10 threads sharing same logger, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_mt         Elapsed: 0.60 secs        1,659,613/sec
+[info] rotating_mt      Elapsed: 0.62 secs        1,612,493/sec
+[info] daily_mt         Elapsed: 0.61 secs        1,638,305/sec
+[info] null_mt          Elapsed: 0.16 secs        6,272,758/sec
+```
+#### ASynchronous mode
+```
+[info] -------------------------------------------------
+[info] Messages     : 1,000,000
+[info] Threads      : 10
+[info] Queue        : 8,192 slots
+[info] Queue memory : 8,192 x 272 = 2,176 KB 
+[info] Total iters  : 3
+[info] -------------------------------------------------
+[info] 
+[info] *********************************
+[info] Queue Overflow Policy: block
+[info] *********************************
+[info] Elapsed: 1.70784 secs     585,535/sec
+[info] Elapsed: 1.69805 secs     588,910/sec
+[info] Elapsed: 1.7026 secs      587,337/sec
+[info] 
+[info] *********************************
+[info] Queue Overflow Policy: overrun
+[info] *********************************
+[info] Elapsed: 0.372816 secs    2,682,285/sec
+[info] Elapsed: 0.379758 secs    2,633,255/sec
+[info] Elapsed: 0.373532 secs    2,677,147/sec
+
 ```
 
 ## Documentation

appveyor.yml

@@ -26,7 +26,9 @@ build_script:
 
     set PATH=C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin;%PATH%
 
-    cmake .. -G %GENERATOR% -DCMAKE_BUILD_TYPE=%BUILD_TYPE%
+    cmake .. -G %GENERATOR% -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DSPDLOG_WCHAR_SUPPORT=ON -DSPDLOG_BUILD_EXAMPLE=ON -DSPDLOG_BUILD_EXAMPLE_HO=ON -DSPDLOG_BUILD_TESTS=ON -DSPDLOG_BUILD_TESTS_HO=OFF
 
     cmake --build . --config %BUILD_TYPE%
-test: off
+
+test_script:
+- ctest -VV -C "%BUILD_TYPE%"

bench/CMakeLists.txt

@@ -0,0 +1,28 @@
+# Copyright(c) 2019 spdlog authors
+# Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+cmake_minimum_required(VERSION 3.1)
+project(spdlog_bench CXX)
+
+if(NOT TARGET spdlog)
+  # Stand-alone build
+  find_package(spdlog CONFIG REQUIRED)
+endif()
+
+find_package(Threads REQUIRED)
+find_package(benchmark CONFIG REQUIRED)
+
+add_executable(bench bench.cpp)
+spdlog_enable_warnings(bench)
+target_link_libraries(bench PRIVATE spdlog::spdlog)
+
+add_executable(async_bench async_bench.cpp)
+target_link_libraries(async_bench PRIVATE spdlog::spdlog)
+
+add_executable(latency latency.cpp)
+target_link_libraries(latency PRIVATE benchmark::benchmark spdlog::spdlog)
+
+add_executable(formatter-bench formatter-bench.cpp)
+target_link_libraries(formatter-bench PRIVATE benchmark::benchmark spdlog::spdlog)
+
+file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")

bench/Makefile

@@ -1,97 +0,0 @@
-CXX	?= g++
-CXXFLAGS	= -march=native -Wall -Wextra -pedantic -std=c++11 -pthread -I../include
-CXX_RELEASE_FLAGS = -O3 -flto -DNDEBUG
-
-
-#         g2log-async
-binaries=spdlog-bench spdlog-bench-mt spdlog-async spdlog-null-async \
-         boost-bench boost-bench-mt \
-         glog-bench glog-bench-mt \
-         g3log-async \
-         p7-bench p7-bench-mt \
-         log4cpp-bench log4cpp-bench-mt \
-         log4cplus-bench log4cplus-bench-mt \
-         easylogging-bench easylogging-bench-mt easylogging-bench-async \
-         plog-bench plog-bench-mt
-
-all: $(binaries)
-
-spdlog-bench: spdlog-bench.cpp
-	$(CXX) spdlog-bench.cpp -o spdlog-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-spdlog-bench-mt: spdlog-bench-mt.cpp
-	$(CXX) spdlog-bench-mt.cpp -o spdlog-bench-mt  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-spdlog-async: spdlog-async.cpp
-	$(CXX) spdlog-async.cpp -o spdlog-async  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-
-spdlog-null-async: spdlog-null-async.cpp
-	$(CXX) spdlog-null-async.cpp -o spdlog-null-async $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-
-BOOST_FLAGS	= -DBOOST_LOG_DYN_LINK -I$(HOME)/include -I/usr/include -L$(HOME)/lib -lboost_log_setup -lboost_log -lboost_filesystem -lboost_system -lboost_thread -lboost_regex -lboost_date_time -lboost_chrono
-
-boost-bench: boost-bench.cpp
-	$(CXX) boost-bench.cpp -o boost-bench $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-boost-bench-mt: boost-bench-mt.cpp
-	$(CXX) boost-bench-mt.cpp -o boost-bench-mt $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)	
-
-GLOG_FLAGS = -I$(HOME)/include -L$(HOME)/lib -lglog
-glog-bench: glog-bench.cpp
-	$(CXX) glog-bench.cpp -o glog-bench $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-glog-bench-mt: glog-bench-mt.cpp
-	$(CXX) glog-bench-mt.cpp -o glog-bench-mt $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)	
-
-G2LOG_FLAGS = -I$(HOME)/include -L$(HOME)/lib -llib_g2logger 
-g2log-async: g2log-async.cpp
-	$(CXX) g2log-async.cpp -o g2log-async $(CXXFLAGS) $(G2LOG_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-G3LOG_FLAGS = -I$(HOME)/include -L$(HOME)/lib -lg3logger
-g3log-async: g3log-async.cpp
-	$(CXX) g3log-async.cpp -o g3log-async $(CXXFLAGS) $(G3LOG_FLAGS) $(CXX_RELEASE_FLAGS)
-
-P7_FLAGS = -I$(HOME)/P7/Headers -I$(HOME)/include -L$(HOME)/lib -lP7
-p7-bench: p7-bench.cpp
-	$(CXX) p7-bench.cpp -o p7-bench $(CXXFLAGS) $(P7_FLAGS) $(CXX_RELEASE_FLAGS)
-
-p7-bench-mt: p7-bench-mt.cpp
-	$(CXX) p7-bench-mt.cpp -o p7-bench-mt $(CXXFLAGS) $(P7_FLAGS) $(CXX_RELEASE_FLAGS)
-
-LOG4CPP_FLAGS = -I$(HOME)/include -L$(HOME)/lib -llog4cpp
-log4cpp-bench: log4cpp-bench.cpp
-	$(CXX) log4cpp-bench.cpp -o log4cpp-bench $(CXXFLAGS) $(LOG4CPP_FLAGS) $(CXX_RELEASE_FLAGS)
-
-log4cpp-bench-mt: log4cpp-bench-mt.cpp
-	$(CXX) log4cpp-bench-mt.cpp -o log4cpp-bench-mt $(CXXFLAGS) $(LOG4CPP_FLAGS) $(CXX_RELEASE_FLAGS)
-
-LOG4CPLUS_FLAGS = -I$(HOME)/include -L$(HOME)/lib -llog4cplus
-log4cplus-bench: log4cplus-bench.cpp
-	$(CXX) log4cplus-bench.cpp -o log4cplus-bench $(CXXFLAGS) $(LOG4CPLUS_FLAGS) $(CXX_RELEASE_FLAGS)
-
-log4cplus-bench-mt: log4cplus-bench-mt.cpp
-	$(CXX) log4cplus-bench-mt.cpp -o log4cplus-bench-mt $(CXXFLAGS) $(LOG4CPLUS_FLAGS) $(CXX_RELEASE_FLAGS)
-
-EASYL_FLAGS = -I$(HOME)/easyloggingpp/src
-easylogging-bench: easylogging-bench.cpp
-	$(CXX) easylogging-bench.cpp -o easylogging-bench $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
-
-easylogging-bench-mt: easylogging-bench-mt.cpp
-	$(CXX) easylogging-bench-mt.cpp -o easylogging-bench-mt $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
-
-easylogging-bench-async: easylogging-bench-async.cpp
-	$(CXX) easylogging-bench-async.cpp -o easylogging-bench-async $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
-
-PLOG_FLAGS = -I$(HOME)/include
-plog-bench: plog-bench.cpp
-	$(CXX) plog-bench.cpp -o plog-bench $(CXXFLAGS) $(PLOG_FLAGS) $(CXX_RELEASE_FLAGS)
-
-plog-bench-mt: plog-bench-mt.cpp
-	$(CXX) plog-bench-mt.cpp -o plog-bench-mt $(CXXFLAGS) $(PLOG_FLAGS) $(CXX_RELEASE_FLAGS)
-
-.PHONY: clean
-
-clean:
-	rm -f *.o logs/* $(binaries)
-
-rebuild: clean all

bench/Makefile.mingw

@@ -1,57 +0,0 @@
-CXX	?= g++
-CXXFLAGS	= -D_WIN32_WINNT=0x600 -march=native -Wall -Wextra -pedantic -std=c++11 -pthread -Wl,--no-as-needed  -I../include 
-CXX_RELEASE_FLAGS = -O3 -flto
-
-
-binaries=spdlog-bench spdlog-bench-mt spdlog-async boost-bench boost-bench-mt glog-bench glog-bench-mt g2log-async easylogging-bench easylogging-bench-mt
-
-all: $(binaries)
-
-spdlog-bench: spdlog-bench.cpp
-	$(CXX) spdlog-bench.cpp -o spdlog-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-spdlog-bench-mt: spdlog-bench-mt.cpp
-	$(CXX) spdlog-bench-mt.cpp -o spdlog-bench-mt  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-spdlog-async: spdlog-async.cpp
-	$(CXX) spdlog-async.cpp -o spdlog-async  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-BOOST_FLAGS	= -DBOOST_LOG_DYN_LINK  -I/home/gabi/devel/boost_1_56_0/ -L/home/gabi/devel/boost_1_56_0/stage/lib -lboost_log  -lboost_log_setup -lboost_filesystem -lboost_system -lboost_thread -lboost_regex -lboost_date_time -lboost_chrono	
-
-boost-bench: boost-bench.cpp
-	$(CXX) boost-bench.cpp -o boost-bench $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-boost-bench-mt: boost-bench-mt.cpp
-	$(CXX) boost-bench-mt.cpp -o boost-bench-mt $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)	
-
-
-GLOG_FLAGS = -lglog
-glog-bench: glog-bench.cpp
-	$(CXX) glog-bench.cpp -o glog-bench $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-glog-bench-mt: glog-bench-mt.cpp
-	$(CXX) glog-bench-mt.cpp -o glog-bench-mt $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)	
-
-
-G2LOG_FLAGS = -I/home/gabi/devel/g2log/g2log/src -L/home/gabi/devel/g2log/g2log -llib_g2logger 
-g2log-async: g2log-async.cpp
-	$(CXX) g2log-async.cpp -o g2log-async $(CXXFLAGS) $(G2LOG_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-EASYL_FLAGS = -I../../easylogging/src/
-easylogging-bench: easylogging-bench.cpp
-	$(CXX) easylogging-bench.cpp -o easylogging-bench $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
-easylogging-bench-mt: easylogging-bench-mt.cpp
-	$(CXX) easylogging-bench-mt.cpp -o easylogging-bench-mt $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)	
-	
-.PHONY: clean
-
-clean:
-	rm -f *.o logs/* $(binaries)
-
-
-rebuild: clean all
-
-
-

bench/README.md

@@ -1,14 +0,0 @@
-# loggers
-
-Name | License | Lang. | Year | Platform | Compiler | Dependence | URL
---- | --- | --- | --- | --- | --- | --- | ---
-Pantheios | BSD | C++ | 2017 | Windows, Linux, MacOSX | VC++, GCC(3.2+), Intel, Borland, Comeau, Digital Mars, Metrowerks | STLSoft | http://www.pantheios.org/ <br> http://blog.pantheios.org/ <br> https://github.com/synesissoftware/Pantheios <br> http://www.pantheios.org/performance.html
-Glog | 3-clause BSD| C++| 2017 | Windows, Linux, MacOSX | VC++, GCC, Clang, intel| Google gflags | https://github.com/google/glog
-G3log | Public Domain | C++11 | 2018 | Windows, Linux, MacOSX, iPhoneOS | VC++, GCC, Clang, MinGW | None | https://github.com/KjellKod/g3log <br> https://github.com/KjellKod/g3sinks <br> https://kjellkod.wordpress.com/2014/08/16/presenting-g3log-the-next-version-of-the-next-generation-of-loggers/ <br> https://kjellkod.wordpress.com/2015/06/30/the-worlds-fastest-logger-vs-g3log/
-P7 | LGPL | C++, C, C#, Python | 2017 | Windows, Linux | VC++, GCC, Clang, MinGW | None | http://baical.net/p7.html
-log4cpp | LGPL | C++ | 2017 | Windows, Linux, MacOSX | VC++, GCC, Sun CC, OpenVMS | Boost | http://log4cpp.sourceforge.net/
-log4cplus | 2-clause BSD or Apache 2 | C++ | 2017 | Windows, Linux, MacOSX, Android | VC++, GCC, Clang | Boost | https://github.com/log4cplus/log4cplus <br> https://sourceforge.net/p/log4cplus/wiki/Home/
-Easylogging | MIT | C++11 | 2018 | Windows, Linux, MacOSX, iPhoneOS, Android | VC++, GCC, Clang, Intel, MinGW | None | https://github.com/muflihun/easyloggingpp
-Spdlog | MIT | C++11 | 2018 | Windows, Linux, MacOSX, iPhoneOS, Android(logcat) | VC++, GCC, Clang, MinGW | None, Headers only library | https://github.com/gabime/spdlog <br> https://github.com/fmtlib/fmt
-Boost.Log v2 | Boost | C++ | 2016 | Windows, Linux, MacOSX, iPhoneOS, Android | VC++, GCC, Clang | Boost | https://github.com/boostorg/log <br> http://www.boost.org/doc/libs/1_66_0/libs/log/doc/html/index.html
-plog | MPL 2.0 | C++ | 2017 | Windows, Linux, MacOSX, iPhoneOS, Android | gcc, clang, msvc, mingw, mingw-w64, icc, c++builder | None, Headers only library | https://github.com/SergiusTheBest/plog

bench/async_bench.cpp

@@ -0,0 +1,179 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// bench.cpp : spdlog benchmarks
+//
+#include "spdlog/spdlog.h"
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/stdout_color_sinks.h"
+
+#include "utils.h"
+#include <atomic>
+#include <iostream>
+#include <memory>
+#include <string>
+#include <thread>
+
+using namespace std;
+using namespace std::chrono;
+using namespace spdlog;
+using namespace spdlog::sinks;
+using namespace utils;
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4996) // disable fopen warning under msvc
+#endif                          // _MSC_VER
+
+int count_lines(const char *filename)
+{
+    int counter = 0;
+    auto *infile = fopen(filename, "r");
+    int ch;
+    while (EOF != (ch = getc(infile)))
+    {
+        if ('\n' == ch)
+            counter++;
+    }
+    fclose(infile);
+
+    return counter;
+}
+
+void verify_file(const char *filename, int expected_count)
+{
+    spdlog::info("Verifying {} to contain {:n} line..", filename, expected_count);
+    auto count = count_lines(filename);
+    if (count != expected_count)
+    {
+        spdlog::error("Test failed. {} has {:n} lines instead of {:n}", filename, count, expected_count);
+        exit(1);
+    }
+    spdlog::info("Line count OK ({:n})\n", count);
+}
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+int main(int argc, char *argv[])
+{
+
+    int howmany = 1000000;
+    int queue_size = std::min(howmany + 2, 8192);
+    int threads = 10;
+    int iters = 3;
+
+    try
+    {
+        spdlog::set_pattern("[%^%l%$] %v");
+        if (argc == 1)
+        {
+            spdlog::info("Usage: {} <message_count> <threads> <q_size> <iterations>", argv[0]);
+            return 0;
+        }
+
+        if (argc > 1)
+            howmany = atoi(argv[1]);
+        if (argc > 2)
+            threads = atoi(argv[2]);
+        if (argc > 3)
+        {
+            queue_size = atoi(argv[3]);
+            if (queue_size > 500000)
+            {
+                spdlog::error("Max queue size allowed: 500,000");
+                exit(1);
+            }
+        }
+
+        if (argc > 4)
+            iters = atoi(argv[4]);
+
+        auto slot_size = sizeof(spdlog::details::async_msg);
+        spdlog::info("-------------------------------------------------");
+        spdlog::info("Messages     : {:n}", howmany);
+        spdlog::info("Threads      : {:n}", threads);
+        spdlog::info("Queue        : {:n} slots", queue_size);
+        spdlog::info("Queue memory : {:n} x {} = {:n} KB ", queue_size, slot_size, (queue_size * slot_size) / 1024);
+        spdlog::info("Total iters  : {:n}", iters);
+        spdlog::info("-------------------------------------------------");
+
+        const char *filename = "logs/basic_async.log";
+        spdlog::info("");
+        spdlog::info("*********************************");
+        spdlog::info("Queue Overflow Policy: block");
+        spdlog::info("*********************************");
+        for (int i = 0; i < iters; i++)
+        {
+            auto tp = std::make_shared<details::thread_pool>(queue_size, 1);
+            auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(filename, true);
+            auto logger = std::make_shared<async_logger>("async_logger", std::move(file_sink), std::move(tp), async_overflow_policy::block);
+            bench_mt(howmany, std::move(logger), threads);
+            // verify_file(filename, howmany);
+        }
+
+        spdlog::info("");
+        spdlog::info("*********************************");
+        spdlog::info("Queue Overflow Policy: overrun");
+        spdlog::info("*********************************");
+        // do same test but discard oldest if queue is full instead of blocking
+        filename = "logs/basic_async-overrun.log";
+        for (int i = 0; i < iters; i++)
+        {
+            auto tp = std::make_shared<details::thread_pool>(queue_size, 1);
+            auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(filename, true);
+            auto logger =
+                std::make_shared<async_logger>("async_logger", std::move(file_sink), std::move(tp), async_overflow_policy::overrun_oldest);
+            bench_mt(howmany, std::move(logger), threads);
+        }
+        spdlog::shutdown();
+    }
+    catch (std::exception &ex)
+    {
+        std::cerr << "Error: " << ex.what() << std::endl;
+        perror("Last error");
+        return 1;
+    }
+    return 0;
+}
+
+void thread_fun(std::shared_ptr<spdlog::logger> logger, int howmany)
+{
+    for (int i = 0; i < howmany; i++)
+    {
+        logger->info("Hello logger: msg number {}", i);
+    }
+}
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> logger, int thread_count)
+{
+    using std::chrono::high_resolution_clock;
+    vector<thread> threads;
+    auto start = high_resolution_clock::now();
+
+    int msgs_per_thread = howmany / thread_count;
+    int msgs_per_thread_mod = howmany % thread_count;
+    for (int t = 0; t < thread_count; ++t)
+    {
+        if (t == 0 && msgs_per_thread_mod)
+            threads.push_back(std::thread(thread_fun, logger, msgs_per_thread + msgs_per_thread_mod));
+        else
+            threads.push_back(std::thread(thread_fun, logger, msgs_per_thread));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    };
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::info("Elapsed: {} secs\t {:n}/sec", delta_d, int(howmany / delta_d));
+}

bench/bench.cpp

@@ -0,0 +1,216 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// bench.cpp : spdlog benchmarks
+//
+#include "spdlog/spdlog.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/daily_file_sink.h"
+#include "spdlog/sinks/null_sink.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+#include "utils.h"
+#include <atomic>
+#include <cstdlib> // EXIT_FAILURE
+#include <memory>
+#include <string>
+#include <thread>
+
+using namespace std;
+using namespace std::chrono;
+using namespace spdlog;
+using namespace spdlog::sinks;
+using namespace utils;
+
+void bench(int howmany, std::shared_ptr<spdlog::logger> log);
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
+void bench_default_api(int howmany, std::shared_ptr<spdlog::logger> log);
+void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log);
+
+static size_t file_size = 30 * 1024 * 1024;
+static size_t rotating_files = 5;
+
+void bench_threaded_logging(int threads, int iters)
+{
+    spdlog::info("**************************************************************");
+    spdlog::info("Multi threaded: {:n} threads, {:n} messages", threads, iters);
+    spdlog::info("**************************************************************");
+
+    auto basic_mt = spdlog::basic_logger_mt("basic_mt", "logs/basic_mt.log", true);
+    bench_mt(iters, std::move(basic_mt), threads);
+    auto basic_mt_tracing = spdlog::basic_logger_mt("basic_mt/backtrace-on", "logs/basic_mt.log", true);
+    basic_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(basic_mt_tracing), threads);
+
+    spdlog::info("");
+    auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt.log", file_size, rotating_files);
+    bench_mt(iters, std::move(rotating_mt), threads);
+    auto rotating_mt_tracing = spdlog::rotating_logger_mt("rotating_mt/backtrace-on", "logs/rotating_mt.log", file_size, rotating_files);
+    rotating_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(rotating_mt_tracing), threads);
+
+    spdlog::info("");
+    auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt.log");
+    bench_mt(iters, std::move(daily_mt), threads);
+    auto daily_mt_tracing = spdlog::daily_logger_mt("daily_mt/backtrace-on", "logs/daily_mt.log");
+    daily_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(daily_mt_tracing), threads);
+
+    spdlog::info("");
+    auto empty_logger = std::make_shared<spdlog::logger>("level-off");
+    empty_logger->set_level(spdlog::level::off);
+    bench(iters, empty_logger);
+    auto empty_logger_tracing = std::make_shared<spdlog::logger>("level-off/backtrace-on");
+    empty_logger_tracing->set_level(spdlog::level::off);
+    empty_logger_tracing->enable_backtrace(32);
+    bench(iters, empty_logger_tracing);
+}
+
+void bench_single_threaded(int iters)
+{
+    spdlog::info("**************************************************************");
+    spdlog::info("Single threaded: {:n} messages", iters);
+    spdlog::info("**************************************************************");
+
+    auto basic_st = spdlog::basic_logger_st("basic_st", "logs/basic_st.log", true);
+    bench(iters, std::move(basic_st));
+
+    auto basic_st_tracing = spdlog::basic_logger_st("basic_st/backtrace-on", "logs/basic_st.log", true);
+    bench(iters, std::move(basic_st_tracing));
+
+    spdlog::info("");
+    auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st.log", file_size, rotating_files);
+    bench(iters, std::move(rotating_st));
+    auto rotating_st_tracing = spdlog::rotating_logger_st("rotating_st/backtrace-on", "logs/rotating_st.log", file_size, rotating_files);
+    rotating_st_tracing->enable_backtrace(32);
+    bench(iters, std::move(rotating_st_tracing));
+
+    spdlog::info("");
+    auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st.log");
+    bench(iters, std::move(daily_st));
+    auto daily_st_tracing = spdlog::daily_logger_st("daily_st/backtrace-on", "logs/daily_st.log");
+    daily_st_tracing->enable_backtrace(32);
+    bench(iters, std::move(daily_st_tracing));
+
+    spdlog::info("");
+    auto empty_logger = std::make_shared<spdlog::logger>("level-off");
+    empty_logger->set_level(spdlog::level::off);
+    bench(iters, empty_logger);
+
+    auto empty_logger_tracing = std::make_shared<spdlog::logger>("level-off/backtrace-on");
+    empty_logger_tracing->set_level(spdlog::level::off);
+    empty_logger_tracing->enable_backtrace(32);
+    bench(iters, empty_logger_tracing);
+}
+
+int main(int argc, char *argv[])
+{
+    spdlog::set_automatic_registration(false);
+    spdlog::default_logger()->set_pattern("[%^%l%$] %v");
+    int iters = 250000;
+    int threads = 4;
+    try
+    {
+
+        if (argc > 1)
+            iters = atoi(argv[1]);
+        if (argc > 2)
+            threads = atoi(argv[2]);
+
+        bench_single_threaded(iters);
+        bench_threaded_logging(1, iters);
+        bench_threaded_logging(threads, iters);
+    }
+    catch (std::exception &ex)
+    {
+        spdlog::error(ex.what());
+        return EXIT_FAILURE;
+    }
+    return EXIT_SUCCESS;
+}
+
+void bench(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    using std::chrono::high_resolution_clock;
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        log->info("Hello logger: msg number {}", i);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+    spdlog::drop(log->name());
+}
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count)
+{
+    using std::chrono::high_resolution_clock;
+    vector<thread> threads;
+    auto start = high_resolution_clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            for (int j = 0; j < howmany / thread_count; j++)
+            {
+                log->info("Hello logger: msg number {}", j);
+            }
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    };
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+    spdlog::drop(log->name());
+}
+
+void bench_default_api(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    using std::chrono::high_resolution_clock;
+    auto orig_default = spdlog::default_logger();
+    spdlog::set_default_logger(log);
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        spdlog::info("Hello logger: msg number {}", i);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::drop(log->name());
+    spdlog::set_default_logger(std::move(orig_default));
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+}
+
+void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    const char *msg = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum pharetra metus cursus "
+                      "lacus placerat congue. Nulla egestas, mauris a tincidunt tempus, enim lectus volutpat mi, eu consequat sem "
+                      "libero nec massa. In dapibus ipsum a diam rhoncus gravida. Etiam non dapibus eros. Donec fringilla dui sed "
+                      "augue pretium, nec scelerisque est maximus. Nullam convallis, sem nec blandit maximus, nisi turpis ornare "
+                      "nisl, sit amet volutpat neque massa eu odio. Maecenas malesuada quam ex, posuere congue nibh turpis duis.";
+    using std::chrono::high_resolution_clock;
+    auto orig_default = spdlog::default_logger();
+    spdlog::set_default_logger(log);
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        spdlog::log(level::info, msg);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::drop(log->name());
+    spdlog::set_default_logger(std::move(orig_default));
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+}

bench/boost-bench-mt.cpp

@@ -1,86 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#include <boost/log/core.hpp>
-#include <boost/log/expressions.hpp>
-#include <boost/log/sinks/text_file_backend.hpp>
-#include <boost/log/sources/record_ostream.hpp>
-#include <boost/log/sources/severity_logger.hpp>
-#include <boost/log/trivial.hpp>
-#include <boost/log/utility/setup/common_attributes.hpp>
-#include <boost/log/utility/setup/file.hpp>
-
-namespace logging = boost::log;
-namespace src = boost::log::sources;
-namespace sinks = boost::log::sinks;
-namespace keywords = boost::log::keywords;
-
-void init()
-{
-    logging::add_file_log(keywords::file_name = "logs/boost-bench-mt_%N.log", /*< file name pattern >*/
-        keywords::auto_flush = false, keywords::format = "[%TimeStamp%]: %Message%");
-
-    logging::core::get()->set_filter(logging::trivial::severity >= logging::trivial::info);
-}
-
-using namespace std;
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    init();
-    logging::add_common_attributes();
-
-    using namespace logging::trivial;
-
-    src::severity_logger_mt<severity_level> lg;
-
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                BOOST_LOG_SEV(lg, info) << "boost message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/boost-bench.cpp

@@ -1,56 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <chrono>
-#include <iostream>
-
-#include <boost/log/core.hpp>
-#include <boost/log/expressions.hpp>
-#include <boost/log/sinks/text_file_backend.hpp>
-#include <boost/log/sources/record_ostream.hpp>
-#include <boost/log/sources/severity_logger.hpp>
-#include <boost/log/trivial.hpp>
-#include <boost/log/utility/setup/common_attributes.hpp>
-#include <boost/log/utility/setup/file.hpp>
-
-namespace logging = boost::log;
-namespace src = boost::log::sources;
-namespace sinks = boost::log::sinks;
-namespace keywords = boost::log::keywords;
-
-void init()
-{
-    logging::add_file_log(keywords::file_name = "logs/boost-bench_%N.log", /*< file name pattern >*/
-        keywords::auto_flush = false, keywords::format = "[%TimeStamp%]: %Message%");
-
-    logging::core::get()->set_filter(logging::trivial::severity >= logging::trivial::info);
-}
-
-int main(int, char *[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int howmany = 1000000;
-    init();
-    logging::add_common_attributes();
-
-    using namespace logging::trivial;
-    src::severity_logger_mt<severity_level> lg;
-
-    auto start = clock::now();
-    for (int i = 0; i < howmany; ++i)
-        BOOST_LOG_SEV(lg, info) << "boost message #" << i << ": This is some text for your pleasure";
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/easyl-async.conf

@@ -1,10 +0,0 @@
-* GLOBAL:
-    FORMAT                  =   "[%datetime]: %levshort %thread %msg"
-    FILENAME                =   ./logs/easylogging-async.log
-    ENABLED                 =   true
-    TO_FILE                 =   true
-    TO_STANDARD_OUTPUT      =   false
-    MILLISECONDS_WIDTH      =   3
-    PERFORMANCE_TRACKING    =   false
-    MAX_LOG_FILE_SIZE       =   10485760
-    Log_Flush_Threshold		= 	10485760

bench/easyl-mt.conf

@@ -1,10 +0,0 @@
-* GLOBAL:
-    FORMAT                  =   "[%datetime]: %levshort %thread %msg"
-    FILENAME                =   ./logs/easylogging-mt.log
-    ENABLED                 =   true
-    TO_FILE                 =   true
-    TO_STANDARD_OUTPUT      =   false
-    MILLISECONDS_WIDTH      =   3
-    PERFORMANCE_TRACKING    =   false
-    MAX_LOG_FILE_SIZE       =   10485760
-    Log_Flush_Threshold		= 	10485760

bench/easyl.conf

@@ -1,10 +0,0 @@
-* GLOBAL:
-    FORMAT                  =   "[%datetime]: %levshort %msg"
-    FILENAME                =   ./logs/easylogging.log
-    ENABLED                 =   true
-    TO_FILE                 =   true
-    TO_STANDARD_OUTPUT      =   false
-    MILLISECONDS_WIDTH      =   3
-    PERFORMANCE_TRACKING    =   false
-    MAX_LOG_FILE_SIZE       =   10485760
-    Log_Flush_Threshold		= 	10485760

bench/easylogging-bench-async.cpp

@@ -1,67 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#define ELPP_THREAD_SAFE
-#define ELPP_EXPERIMENTAL_ASYNC
-#include "easylogging++.cc"
-#include "easylogging++.h"
-INITIALIZE_EASYLOGGINGPP
-
-using namespace std;
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    // Load configuration from file
-    el::Configurations conf("easyl-async.conf");
-    el::Loggers::reconfigureLogger("default", conf);
-
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                LOG(INFO) << "easylog message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/easylogging-bench-mt.cpp

@@ -1,66 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#define ELPP_THREAD_SAFE
-#include "easylogging++.cc"
-#include "easylogging++.h"
-INITIALIZE_EASYLOGGINGPP
-
-using namespace std;
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    // Load configuration from file
-    el::Configurations conf("easyl-mt.conf");
-    el::Loggers::reconfigureLogger("default", conf);
-
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                LOG(INFO) << "easylog message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/easylogging-bench.cpp

@@ -1,39 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <chrono>
-#include <iostream>
-
-#include "easylogging++.cc"
-#include "easylogging++.h"
-INITIALIZE_EASYLOGGINGPP
-
-int main(int, char *[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int howmany = 1000000;
-
-    // Load configuration from file
-    el::Configurations conf("easyl.conf");
-    el::Loggers::reconfigureLogger("default", conf);
-
-    el::Logger *defaultLogger = el::Loggers::getLogger("default");
-
-    auto start = clock::now();
-    for (int i = 0; i < howmany; ++i)
-        LOG(INFO) << "easylog message #" << i << ": This is some text for your pleasure";
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/formatter-bench.cpp

@@ -0,0 +1,80 @@
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include "benchmark/benchmark.h"
+
+#include "spdlog/spdlog.h"
+#include "spdlog/details/pattern_formatter.h"
+
+void bench_formatter(benchmark::State &state, std::string pattern)
+{
+    auto formatter = spdlog::details::make_unique<spdlog::pattern_formatter>(pattern);
+    spdlog::memory_buf_t dest;
+    std::string logger_name = "logger-name";
+    const char *text = "Hello. This is some message with length of 80                                   ";
+
+    spdlog::source_loc source_loc{"a/b/c/d/myfile.cpp", 123, "some_func()"};
+    spdlog::details::log_msg msg(source_loc, logger_name, spdlog::level::info, text);
+
+    for (auto _ : state)
+    {
+        dest.clear();
+        formatter->format(msg, dest);
+        benchmark::DoNotOptimize(dest);
+    }
+}
+
+void bench_formatters()
+{
+    // basic patterns(single flag)
+    std::string all_flags = "+vtPnlLaAbBcCYDmdHIMSefFprRTXzEisg@luioO%";
+    std::vector<std::string> basic_patterns;
+    for (auto &flag : all_flags)
+    {
+        auto pattern = std::string("%") + flag;
+        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+
+        //        pattern = std::string("%16") + flag;
+        //        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+        //
+        //        // bench center padding
+        //        pattern = std::string("%=16") + flag;
+        //        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+    }
+
+    // complex patterns
+    std::vector<std::string> patterns = {
+        "[%D %X] [%l] [%n] %v",
+        "[%Y-%m-%d %H:%M:%S.%e] [%l] [%n] %v",
+        "[%Y-%m-%d %H:%M:%S.%e] [%l] [%n] [%t] %v",
+    };
+    for (auto &pattern : patterns)
+    {
+        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern)->Iterations(2500000);
+    }
+}
+
+int main(int argc, char *argv[])
+{
+
+    spdlog::set_pattern("[%^%l%$] %v");
+    if (argc != 2)
+    {
+        spdlog::error("Usage: {} <pattern> (or \"all\" to bench all)", argv[0]);
+        exit(1);
+    }
+
+    std::string pattern = argv[1];
+    if (pattern == "all")
+    {
+        bench_formatters();
+    }
+    else
+    {
+        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+    }
+    benchmark::Initialize(&argc, argv);
+    benchmark::RunSpecifiedBenchmarks();
+}

bench/g2log-async.cpp

@@ -1,61 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#include "g2log.h"
-#include "g2logworker.h"
-
-using namespace std;
-template<typename T>
-std::string format(const T &value);
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-    int thread_count = 10;
-
-    if (argc > 1)
-        thread_count = atoi(argv[1]);
-    int howmany = 1000000;
-
-    g2LogWorker g2log(argv[0], "logs");
-    g2::initializeLogging(&g2log);
-
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                LOG(INFO) << "g2log message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    cout << "Total: " << howmany << std::endl;
-    cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-}

bench/g3log-async.cpp

@@ -1,63 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#include "g3log/g3log.hpp"
-#include "g3log/logworker.hpp"
-
-using namespace std;
-template<typename T>
-std::string format(const T &value);
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-    int thread_count = 10;
-
-    if (argc > 1)
-        thread_count = atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    auto worker = g3::LogWorker::createLogWorker();
-    auto handle = worker->addDefaultLogger(argv[0], "logs");
-    g3::initializeLogging(worker.get());
-
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                LOG(INFO) << "g3log message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    cout << "Total: " << howmany << std::endl;
-    cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-}

bench/glog-bench-mt.cpp

@@ -1,63 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#include "glog/logging.h"
-
-using namespace std;
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    FLAGS_logtostderr = 0;
-    FLAGS_log_dir = "logs";
-    google::InitGoogleLogging(argv[0]);
-
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                LOG(INFO) << "glog message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/glog-bench.cpp

@@ -1,34 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <chrono>
-#include <iostream>
-
-#include "glog/logging.h"
-
-int main(int, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int howmany = 1000000;
-
-    FLAGS_logtostderr = 0;
-    FLAGS_log_dir = "logs";
-    google::InitGoogleLogging(argv[0]);
-    auto start = clock::now();
-    for (int i = 0; i < howmany; ++i)
-        LOG(INFO) << "glog message #" << i << ": This is some text for your pleasure";
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/latency.cpp

@@ -0,0 +1,169 @@
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// latency.cpp : spdlog latency benchmarks
+//
+
+#include "benchmark/benchmark.h"
+
+#include "spdlog/spdlog.h"
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/daily_file_sink.h"
+#include "spdlog/sinks/null_sink.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+void prepare_logdir()
+{
+    spdlog::info("Preparing latency_logs directory..");
+#ifdef _WIN32
+    system("if not exist logs mkdir latency_logs");
+    system("del /F /Q logs\\*");
+#else
+    auto rv = system("mkdir -p latency_logs");
+    if (rv != 0)
+    {
+        throw std::runtime_error("Failed to mkdir -p latency_logs");
+    }
+    rv = system("rm -f latency_logs/*");
+    if (rv != 0)
+    {
+        throw std::runtime_error("Failed to rm -f latency_logs/*");
+    }
+#endif
+}
+
+void bench_c_string(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    const char *msg = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum pharetra metus cursus "
+                      "lacus placerat congue. Nulla egestas, mauris a tincidunt tempus, enim lectus volutpat mi, eu consequat sem "
+                      "libero nec massa. In dapibus ipsum a diam rhoncus gravida. Etiam non dapibus eros. Donec fringilla dui sed "
+                      "augue pretium, nec scelerisque est maximus. Nullam convallis, sem nec blandit maximus, nisi turpis ornare "
+                      "nisl, sit amet volutpat neque massa eu odio. Maecenas malesuada quam ex, posuere congue nibh turpis duis.";
+
+    for (auto _ : state)
+    {
+        logger->info(msg);
+    }
+}
+
+void bench_logger(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    int i = 0;
+    for (auto _ : state)
+    {
+        logger->info("Hello logger: msg number {}...............", ++i);
+    }
+}
+
+void bench_disabled_macro(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    int i = 0;
+    benchmark::DoNotOptimize(i);      // prevent unused warnings
+    benchmark::DoNotOptimize(logger); // prevent unused warnings
+    for (auto _ : state)
+    {
+        SPDLOG_LOGGER_DEBUG(logger, "Hello logger: msg number {}...............", i++);
+        SPDLOG_DEBUG("Hello logger: msg number {}...............", i++);
+    }
+}
+
+int main(int argc, char *argv[])
+{
+
+    using spdlog::sinks::basic_file_sink_mt;
+    using spdlog::sinks::basic_file_sink_st;
+    using spdlog::sinks::null_sink_mt;
+    using spdlog::sinks::null_sink_st;
+
+    size_t file_size = 30 * 1024 * 1024;
+    size_t rotating_files = 5;
+    int n_threads = benchmark::CPUInfo::Get().num_cpus;
+
+    prepare_logdir();
+
+    // disabled loggers
+    auto disabled_logger = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+    disabled_logger->set_level(spdlog::level::off);
+    benchmark::RegisterBenchmark("disabled-at-compile-time", bench_disabled_macro, disabled_logger);
+    benchmark::RegisterBenchmark("disabled-at-runtime", bench_logger, disabled_logger);
+    // with backtrace of 64
+    auto tracing_disabled_logger = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+    tracing_disabled_logger->enable_backtrace(64);
+    benchmark::RegisterBenchmark("disabled-at-runtime/backtrace", bench_logger, tracing_disabled_logger);
+
+    auto null_logger_st = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_st>());
+    benchmark::RegisterBenchmark("null_sink_st (500_bytes c_str)", bench_c_string, std::move(null_logger_st));
+    benchmark::RegisterBenchmark("null_sink_st", bench_logger, null_logger_st);
+    // with backtrace of 64
+    auto tracing_null_logger_st = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_st>());
+    tracing_null_logger_st->enable_backtrace(64);
+    benchmark::RegisterBenchmark("null_sink_st/backtrace", bench_logger, tracing_null_logger_st);
+
+    // basic_st
+    auto basic_st = spdlog::basic_logger_st("basic_st", "latency_logs/basic_st.log", true);
+    benchmark::RegisterBenchmark("basic_st", bench_logger, std::move(basic_st))->UseRealTime();
+    spdlog::drop("basic_st");
+    // with backtrace of 64
+    auto tracing_basic_st = spdlog::basic_logger_st("tracing_basic_st", "latency_logs/tracing_basic_st.log", true);
+    tracing_basic_st->enable_backtrace(64);
+    benchmark::RegisterBenchmark("basic_st/backtrace", bench_logger, std::move(tracing_basic_st))->UseRealTime();
+    spdlog::drop("tracing_basic_st");
+
+    // rotating st
+    auto rotating_st = spdlog::rotating_logger_st("rotating_st", "latency_logs/rotating_st.log", file_size, rotating_files);
+    benchmark::RegisterBenchmark("rotating_st", bench_logger, std::move(rotating_st))->UseRealTime();
+    spdlog::drop("rotating_st");
+    // with backtrace of 64
+    auto tracing_rotating_st =
+        spdlog::rotating_logger_st("tracing_rotating_st", "latency_logs/tracing_rotating_st.log", file_size, rotating_files);
+    benchmark::RegisterBenchmark("rotating_st/backtrace", bench_logger, std::move(tracing_rotating_st))->UseRealTime();
+    spdlog::drop("tracing_rotating_st");
+
+    // daily st
+    auto daily_st = spdlog::daily_logger_mt("daily_st", "latency_logs/daily_st.log");
+    benchmark::RegisterBenchmark("daily_st", bench_logger, std::move(daily_st))->UseRealTime();
+    spdlog::drop("daily_st");
+    auto tracing_daily_st = spdlog::daily_logger_mt("tracing_daily_st", "latency_logs/daily_st.log");
+    benchmark::RegisterBenchmark("daily_st/backtrace", bench_logger, std::move(tracing_daily_st))->UseRealTime();
+    spdlog::drop("tracing_daily_st");
+
+    //
+    // Multi threaded bench, 10 loggers using same logger concurrently
+    //
+    auto null_logger_mt = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+    benchmark::RegisterBenchmark("null_sink_mt", bench_logger, null_logger_mt)->Threads(n_threads)->UseRealTime();
+
+    // basic_mt
+    auto basic_mt = spdlog::basic_logger_mt("basic_mt", "latency_logs/basic_mt.log", true);
+    benchmark::RegisterBenchmark("basic_mt", bench_logger, std::move(basic_mt))->Threads(n_threads)->UseRealTime();
+    spdlog::drop("basic_mt");
+
+    // rotating mt
+    auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "latency_logs/rotating_mt.log", file_size, rotating_files);
+    benchmark::RegisterBenchmark("rotating_mt", bench_logger, std::move(rotating_mt))->Threads(n_threads)->UseRealTime();
+    spdlog::drop("rotating_mt");
+
+    // daily mt
+    auto daily_mt = spdlog::daily_logger_mt("daily_mt", "latency_logs/daily_mt.log");
+    benchmark::RegisterBenchmark("daily_mt", bench_logger, std::move(daily_mt))->Threads(n_threads)->UseRealTime();
+    spdlog::drop("daily_mt");
+
+    // async
+    auto queue_size = 1024 * 1024 * 3;
+    auto tp = std::make_shared<spdlog::details::thread_pool>(queue_size, 1);
+    auto async_logger = std::make_shared<spdlog::async_logger>(
+        "async_logger", std::make_shared<null_sink_mt>(), std::move(tp), spdlog::async_overflow_policy::overrun_oldest);
+    benchmark::RegisterBenchmark("async_logger", bench_logger, async_logger)->Threads(n_threads)->UseRealTime();
+
+    auto async_logger_tracing = std::make_shared<spdlog::async_logger>(
+        "async_logger_tracing", std::make_shared<null_sink_mt>(), std::move(tp), spdlog::async_overflow_policy::overrun_oldest);
+    async_logger_tracing->enable_backtrace(32);
+    benchmark::RegisterBenchmark("async_logger/tracing", bench_logger, async_logger_tracing)->Threads(n_threads)->UseRealTime();
+
+    benchmark::Initialize(&argc, argv);
+    benchmark::RunSpecifiedBenchmarks();
+}

bench/latency/Makefile

@@ -1,32 +0,0 @@
-CXX	?= g++
-CXXFLAGS	= -march=native -Wall -std=c++11 -pthread 
-CXX_RELEASE_FLAGS = -O2 -DNDEBUG
-
-
-binaries=spdlog-latency g3log-latency g3log-crush
-
-all: $(binaries)
-
-spdlog-latency: spdlog-latency.cpp
-	$(CXX) spdlog-latency.cpp -o spdlog-latency $(CXXFLAGS) $(CXX_RELEASE_FLAGS) -I../../include
-
-
-
-g3log-latency: g3log-latency.cpp
-	$(CXX) g3log-latency.cpp -o g3log-latency $(CXXFLAGS) $(CXX_RELEASE_FLAGS) -I../../../g3log/src -L. -lg3logger 
-		
-		
-g3log-crush: g3log-crush.cpp
-	$(CXX) g3log-crush.cpp -o g3log-crush $(CXXFLAGS) $(CXX_RELEASE_FLAGS) -I../../../g3log/src -L. -lg3logger 
-		
-	
-.PHONY: clean
-
-clean:
-	rm -f *.o  *.log $(binaries)
-
-
-rebuild: clean all
-
-
-

bench/latency/compare.sh

@@ -1,13 +0,0 @@
-#!/bin/bash
-echo "running spdlog and g3log tests 10 time with ${1:-10} threads each (total 1,000,000 entries).."
-rm -f *.log
-for i in {1..10}
-
-do
-   echo
-   sleep 0.5
-   ./spdlog-latency ${1:-10} 2>/dev/null || exit
-   sleep 0.5
-   ./g3log-latency ${1:-10} 2>/dev/null || exit
-
-done

bench/latency/g3log-crush.cpp

@@ -1,34 +0,0 @@
-#include <iostream>
-
-#include <g3log/g3log.hpp>
-#include <g3log/logworker.hpp>
-
-void CrusherLoop()
-{
-    size_t counter = 0;
-    while (true)
-    {
-        LOGF(INFO, "Some text to crush you machine. thread:");
-        if (++counter % 1000000 == 0)
-        {
-            std::cout << "Wrote " << counter << " entries" << std::endl;
-        }
-    }
-}
-
-int main(int argc, char **argv)
-{
-    std::cout << "WARNING: This test will exaust all your machine memory and will crush it!" << std::endl;
-    std::cout << "Are you sure you want to continue ? " << std::endl;
-    char c;
-    std::cin >> c;
-    if (toupper(c) != 'Y')
-        return 0;
-
-    auto worker = g3::LogWorker::createLogWorker();
-    auto handle = worker->addDefaultLogger(argv[0], "g3log.txt");
-    g3::initializeLogging(worker.get());
-    CrusherLoop();
-
-    return 0;
-}

bench/latency/g3log-latency.cpp

@@ -1,118 +0,0 @@
-#include "utils.h"
-#include <algorithm>
-#include <atomic>
-#include <chrono>
-#include <cstdio>
-#include <fstream>
-#include <functional>
-#include <g3log/g3log.hpp>
-#include <g3log/logworker.hpp>
-#include <iomanip>
-#include <iostream>
-#include <map>
-#include <numeric>
-#include <sstream>
-#include <thread>
-#include <vector>
-
-namespace {
-const uint64_t g_iterations = 1000000;
-
-std::atomic<size_t> g_counter = {0};
-
-void MeasurePeakDuringLogWrites(const size_t id, std::vector<uint64_t> &result)
-{
-
-    while (true)
-    {
-        const size_t value_now = ++g_counter;
-        if (value_now > g_iterations)
-        {
-            return;
-        }
-
-        auto start_time = std::chrono::high_resolution_clock::now();
-        LOGF(INFO, "Some text to log for thread: %ld", id);
-        auto stop_time = std::chrono::high_resolution_clock::now();
-        uint64_t time_us = std::chrono::duration_cast<std::chrono::microseconds>(stop_time - start_time).count();
-        result.push_back(time_us);
-    }
-}
-
-void PrintResults(const std::map<size_t, std::vector<uint64_t>> &threads_result, size_t total_us)
-{
-
-    std::vector<uint64_t> all_measurements;
-    all_measurements.reserve(g_iterations);
-    for (auto &t_result : threads_result)
-    {
-        all_measurements.insert(all_measurements.end(), t_result.second.begin(), t_result.second.end());
-    }
-
-    // calc worst latenct
-    auto worst = *std::max_element(all_measurements.begin(), all_measurements.end());
-
-    // calc avg
-    auto total = accumulate(begin(all_measurements), end(all_measurements), 0, std::plus<uint64_t>());
-    auto avg = double(total) / all_measurements.size();
-
-    std::cout << "[g3log]  worst: " << std::setw(10) << std::right << worst << "\tAvg: " << avg << "\tTotal: " << utils::format(total_us)
-              << " us" << std::endl;
-}
-} // namespace
-
-// The purpose of this test is NOT to see how fast
-// each thread can possibly write. It is to see what
-// the worst latency is for writing a log entry
-//
-// In the test 1 million log entries will be written
-// an atomic counter is used to give each thread what
-// it is to write next. The overhead of atomic
-// synchronization between the threads are not counted in the worst case latency
-int main(int argc, char **argv)
-{
-    size_t number_of_threads{0};
-    if (argc == 2)
-    {
-        number_of_threads = atoi(argv[1]);
-    }
-    if (argc != 2 || number_of_threads == 0)
-    {
-        std::cerr << "USAGE is: " << argv[0] << " number_threads" << std::endl;
-        return 1;
-    }
-
-    std::vector<std::thread> threads(number_of_threads);
-    std::map<size_t, std::vector<uint64_t>> threads_result;
-
-    for (size_t idx = 0; idx < number_of_threads; ++idx)
-    {
-        // reserve to 1 million for all the result
-        // it's a test so  let's not care about the wasted space
-        threads_result[idx].reserve(g_iterations);
-    }
-
-    const std::string g_path = "./";
-    const std::string g_prefix_log_name = "g3log-performance-";
-    const std::string g_measurement_dump = g_path + g_prefix_log_name + "_RESULT.txt";
-
-    auto worker = g3::LogWorker::createLogWorker();
-    auto handle = worker->addDefaultLogger(argv[0], "g3log.txt");
-    g3::initializeLogging(worker.get());
-
-    auto start_time_application_total = std::chrono::high_resolution_clock::now();
-    for (uint64_t idx = 0; idx < number_of_threads; ++idx)
-    {
-        threads[idx] = std::thread(MeasurePeakDuringLogWrites, idx, std::ref(threads_result[idx]));
-    }
-    for (size_t idx = 0; idx < number_of_threads; ++idx)
-    {
-        threads[idx].join();
-    }
-    auto stop_time_application_total = std::chrono::high_resolution_clock::now();
-
-    uint64_t total_time_in_us =
-        std::chrono::duration_cast<std::chrono::microseconds>(stop_time_application_total - start_time_application_total).count();
-    PrintResults(threads_result, total_time_in_us);
-    return 0;
-}

bench/latency/spdlog-latency.cpp

@@ -1,119 +0,0 @@
-
-#include "utils.h"
-#include <algorithm>
-#include <atomic>
-#include <chrono>
-#include <cstdio>
-#include <functional>
-#include <iostream>
-#include <map>
-#include <numeric>
-#include <thread>
-#include <vector>
-
-#include "spdlog/spdlog.h"
-
-namespace spd = spdlog;
-
-namespace {
-const uint64_t g_iterations = 1000000;
-
-std::atomic<size_t> g_counter = {0};
-
-void MeasurePeakDuringLogWrites(const size_t id, std::vector<uint64_t> &result)
-{
-    auto logger = spd::get("file_logger");
-    while (true)
-    {
-        const size_t value_now = ++g_counter;
-        if (value_now > g_iterations)
-        {
-            return;
-        }
-
-        auto start_time = std::chrono::high_resolution_clock::now();
-        logger->info("Some text to log for thread: [somemore text...............................] {}", id);
-        auto stop_time = std::chrono::high_resolution_clock::now();
-        uint64_t time_us = std::chrono::duration_cast<std::chrono::microseconds>(stop_time - start_time).count();
-        result.push_back(time_us);
-    }
-}
-
-void PrintResults(const std::map<size_t, std::vector<uint64_t>> &threads_result, size_t total_us)
-{
-
-    std::vector<uint64_t> all_measurements;
-    all_measurements.reserve(g_iterations);
-    for (auto &t_result : threads_result)
-    {
-        all_measurements.insert(all_measurements.end(), t_result.second.begin(), t_result.second.end());
-    }
-
-    // calc worst latenct
-    auto worst = *std::max_element(all_measurements.begin(), all_measurements.end());
-
-    // calc avg
-    auto total = accumulate(begin(all_measurements), end(all_measurements), 0, std::plus<uint64_t>());
-    auto avg = double(total) / all_measurements.size();
-
-    std::cout << "[spdlog] worst: " << std::setw(10) << std::right << worst << "\tAvg: " << avg << "\tTotal: " << utils::format(total_us)
-              << " us" << std::endl;
-}
-} // namespace
-
-// The purpose of this test is NOT to see how fast
-// each thread can possibly write. It is to see what
-// the worst latency is for writing a log entry
-//
-// In the test 1 million log entries will be written
-// an atomic counter is used to give each thread what
-// it is to write next. The overhead of atomic
-// synchronization between the threads are not counted in the worst case latency
-int main(int argc, char **argv)
-{
-    size_t number_of_threads{0};
-    if (argc == 2)
-    {
-        number_of_threads = atoi(argv[1]);
-    }
-    if (argc != 2 || number_of_threads == 0)
-    {
-        std::cerr << "usage: " << argv[0] << " number_threads" << std::endl;
-        return 1;
-    }
-
-    std::vector<std::thread> threads(number_of_threads);
-    std::map<size_t, std::vector<uint64_t>> threads_result;
-
-    for (size_t idx = 0; idx < number_of_threads; ++idx)
-    {
-        // reserve to 1 million for all the result
-        // it's a test so  let's not care about the wasted space
-        threads_result[idx].reserve(g_iterations);
-    }
-
-    int queue_size = 1048576; // 2 ^ 20
-    spdlog::set_async_mode(queue_size);
-    auto logger = spdlog::create<spd::sinks::simple_file_sink_mt>("file_logger", "spdlog.log", true);
-
-    // force flush on every call to compare with g3log
-    auto s = (spd::sinks::simple_file_sink_mt *)logger->sinks()[0].get();
-    s->set_force_flush(true);
-
-    auto start_time_application_total = std::chrono::high_resolution_clock::now();
-    for (uint64_t idx = 0; idx < number_of_threads; ++idx)
-    {
-        threads[idx] = std::thread(MeasurePeakDuringLogWrites, idx, std::ref(threads_result[idx]));
-    }
-    for (size_t idx = 0; idx < number_of_threads; ++idx)
-    {
-        threads[idx].join();
-    }
-    auto stop_time_application_total = std::chrono::high_resolution_clock::now();
-
-    uint64_t total_time_in_us =
-        std::chrono::duration_cast<std::chrono::microseconds>(stop_time_application_total - start_time_application_total).count();
-
-    PrintResults(threads_result, total_time_in_us);
-    return 0;
-}

bench/latency/utils.h

@@ -1,34 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-#include <iomanip>
-#include <locale>
-#include <sstream>
-
-namespace utils {
-
-template<typename T>
-inline std::string format(const T &value)
-{
-    static std::locale loc("");
-    std::stringstream ss;
-    ss.imbue(loc);
-    ss << value;
-    return ss.str();
-}
-
-template<>
-inline std::string format(const double &value)
-{
-    static std::locale loc("");
-    std::stringstream ss;
-    ss.imbue(loc);
-    ss << std::fixed << std::setprecision(1) << value;
-    return ss.str();
-}
-
-} // namespace utils

bench/log4cplus-bench-mt.cpp

@@ -1,78 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <memory>
-#include <thread>
-#include <vector>
-
-#include "log4cplus/fileappender.h"
-#include "log4cplus/helpers/loglog.h"
-#include "log4cplus/helpers/property.h"
-#include "log4cplus/layout.h"
-#include "log4cplus/logger.h"
-#include "log4cplus/loggingmacros.h"
-#include "log4cplus/ndc.h"
-
-using namespace log4cplus;
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = std::atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    log4cplus::initialize();
-    SharedFileAppenderPtr append(new FileAppender(LOG4CPLUS_TEXT("logs/log4cplus-bench-mt.log"), std::ios_base::trunc, true, true));
-    append->setName(LOG4CPLUS_TEXT("File"));
-
-    log4cplus::tstring pattern = LOG4CPLUS_TEXT("%d{%Y-%m-%d %H:%M:%S.%Q}: %p - %m %n");
-    append->setLayout(std::auto_ptr<Layout>(new PatternLayout(pattern)));
-    append->getloc();
-    Logger::getRoot().addAppender(SharedAppenderPtr(append.get()));
-
-    Logger root = Logger::getRoot();
-
-    std::atomic<int> msg_counter{0};
-    std::vector<std::thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                LOG4CPLUS_INFO(root, "log4cplus message #" << counter << ": This is some text for your pleasure");
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    log4cplus::Logger::shutdown();
-    return 0;
-}

bench/log4cplus-bench.cpp

@@ -1,52 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <chrono>
-#include <iostream>
-#include <memory>
-
-#include "log4cplus/fileappender.h"
-#include "log4cplus/helpers/loglog.h"
-#include "log4cplus/helpers/property.h"
-#include "log4cplus/layout.h"
-#include "log4cplus/logger.h"
-#include "log4cplus/loggingmacros.h"
-#include "log4cplus/ndc.h"
-
-using namespace log4cplus;
-
-int main(int, char *[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int howmany = 1000000;
-
-    log4cplus::initialize();
-    SharedFileAppenderPtr append(new FileAppender(LOG4CPLUS_TEXT("logs/log4cplus-bench.log"), std::ios_base::trunc, true, true));
-    append->setName(LOG4CPLUS_TEXT("File"));
-
-    log4cplus::tstring pattern = LOG4CPLUS_TEXT("%d{%Y-%m-%d %H:%M:%S.%Q}: %p - %m %n");
-    append->setLayout(std::auto_ptr<Layout>(new PatternLayout(pattern)));
-    append->getloc();
-    Logger::getRoot().addAppender(SharedAppenderPtr(append.get()));
-
-    Logger root = Logger::getRoot();
-
-    auto start = clock::now();
-    for (int i = 0; i < howmany; ++i)
-        LOG4CPLUS_INFO(root, "log4cplus message #" << i << ": This is some text for your pleasure");
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    log4cplus::Logger::shutdown();
-    return 0;
-}

bench/log4cpp-bench-mt.cpp

@@ -1,74 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <memory>
-#include <thread>
-#include <vector>
-
-#include "log4cpp/Appender.hh"
-#include "log4cpp/BasicLayout.hh"
-#include "log4cpp/Category.hh"
-#include "log4cpp/FileAppender.hh"
-#include "log4cpp/Layout.hh"
-#include "log4cpp/PatternLayout.hh"
-#include "log4cpp/Priority.hh"
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = std::atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    log4cpp::Appender *appender = new log4cpp::FileAppender("default", "logs/log4cpp-bench-mt.log");
-    log4cpp::PatternLayout *layout = new log4cpp::PatternLayout();
-    layout->setConversionPattern("%d{%Y-%m-%d %H:%M:%S.%l}: %p - %m %n");
-    appender->setLayout(layout);
-
-    log4cpp::Category &root = log4cpp::Category::getRoot();
-    root.addAppender(appender);
-    root.setPriority(log4cpp::Priority::INFO);
-
-    std::atomic<int> msg_counter{0};
-    std::vector<std::thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                root << log4cpp::Priority::INFO << "log4cpp message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    root.shutdown();
-    return 0;
-}

bench/log4cpp-bench.cpp

@@ -1,48 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <chrono>
-#include <iostream>
-#include <memory>
-
-#include "log4cpp/Appender.hh"
-#include "log4cpp/BasicLayout.hh"
-#include "log4cpp/Category.hh"
-#include "log4cpp/FileAppender.hh"
-#include "log4cpp/Layout.hh"
-#include "log4cpp/PatternLayout.hh"
-#include "log4cpp/Priority.hh"
-
-int main(int, char *[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int howmany = 1000000;
-
-    log4cpp::Appender *appender = new log4cpp::FileAppender("default", "logs/log4cpp-bench.log");
-    log4cpp::PatternLayout *layout = new log4cpp::PatternLayout();
-    layout->setConversionPattern("%d{%Y-%m-%d %H:%M:%S.%l}: %p - %m %n");
-    appender->setLayout(layout);
-
-    log4cpp::Category &root = log4cpp::Category::getRoot();
-    root.addAppender(appender);
-    root.setPriority(log4cpp::Priority::INFO);
-
-    auto start = clock::now();
-    for (int i = 0; i < howmany; ++i)
-        root << log4cpp::Priority::INFO << "log4cpp message #" << i << ": This is some text for your pleasure";
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    root.shutdown();
-    return 0;
-}

bench/logs/.gitignore

@@ -1,4 +0,0 @@
-# Ignore everything in this directory
-*
-# Except this file
-!.gitignore

bench/mem

@@ -1,19 +0,0 @@
-#!/bin/sh
-
-if [ $# -lt 1 ]; then
-  echo "usage: $0 <program>"
-fi
-
-PROG=$1
-
-if [ ! -x "$PROG" ]; then
-  echo $PROG not found or not executable.
-  exit 1
-fi
-
-$* &
-PID=$!
-
-while `kill -0 $PID 2>/dev/null`; do
-  ps -eo size,pid,user,pcpu,command --sort -size | awk '{ line=1 ; hr=$1/1024 ; printf("%13.2f Mb ",hr); } { for ( x=4 ; x<=NF ; x++ ) { printf("%s ",$x) } print "" }' | grep -v grep | grep -v $0 | grep $PROG
-done

bench/meson.build

@@ -0,0 +1,15 @@
+benchmark = dependency('benchmark')
+
+bench_matrix = [
+  ['bench',           [spdlog_dep],            []],
+  ['async_bench',     [spdlog_dep],            []],
+  ['formatter-bench', [spdlog_dep, benchmark], ['all']],
+  ['latency',         [spdlog_dep, benchmark], []],
+]
+
+foreach i : bench_matrix
+  bench_exe = executable(i[0], i[0] + '.cpp', dependencies: i[1])
+  benchmark('bench_' + i[0], bench_exe, args: i[2])
+endforeach
+
+run_command(find_program('mkdir'), meson.current_build_dir() + '/logs')

bench/p7-bench-mt.cpp

@@ -1,94 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <functional>
-#include <iostream>
-#include <memory>
-#include <thread>
-#include <vector>
-
-#include "P7_Trace.h"
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = std::atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    IP7_Trace::hModule module = NULL;
-
-    // create P7 client object
-    std::unique_ptr<IP7_Client, std::function<void(IP7_Client *)>> client(
-        P7_Create_Client(TM("/P7.Pool=1024 /P7.Sink=FileTxt /P7.Dir=logs/p7-bench-mt")), [&](IP7_Client *ptr) {
-            if (ptr)
-                ptr->Release();
-        });
-
-    if (!client)
-    {
-        std::cout << "Can't create IP7_Client" << std::endl;
-        return 1;
-    }
-
-    // create P7 trace object 1
-    std::unique_ptr<IP7_Trace, std::function<void(IP7_Trace *)>> trace(
-        P7_Create_Trace(client.get(), TM("Trace channel 1")), [&](IP7_Trace *ptr) {
-            if (ptr)
-                ptr->Release();
-        });
-
-    if (!trace)
-    {
-        std::cout << "Can't create IP7_Trace" << std::endl;
-        return 1;
-    }
-
-    trace->Register_Thread(TM("Application"), 0);
-    trace->Register_Module(TM("Main"), &module);
-
-    std::atomic<int> msg_counter{0};
-    std::vector<std::thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            trace->Register_Thread(TM("Application"), t + 1);
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                trace->P7_INFO(module, TM("p7 message #%d: This is some text for your pleasure"), counter);
-            }
-            trace->Register_Thread(TM("Application"), t + 1);
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    trace->Unregister_Thread(0);
-
-    return 0;
-}

bench/p7-bench.cpp

@@ -1,66 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <chrono>
-#include <functional>
-#include <iostream>
-#include <memory>
-
-#include "P7_Trace.h"
-
-int main(int, char *[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int howmany = 1000000;
-
-    IP7_Trace::hModule module = NULL;
-
-    // create P7 client object
-    std::unique_ptr<IP7_Client, std::function<void(IP7_Client *)>> client(
-        P7_Create_Client(TM("/P7.Pool=1024 /P7.Sink=FileTxt /P7.Dir=logs/p7-bench")), [&](IP7_Client *ptr) {
-            if (ptr)
-                ptr->Release();
-        });
-
-    if (!client)
-    {
-        std::cout << "Can't create IP7_Client" << std::endl;
-        return 1;
-    }
-
-    // create P7 trace object 1
-    std::unique_ptr<IP7_Trace, std::function<void(IP7_Trace *)>> trace(
-        P7_Create_Trace(client.get(), TM("Trace channel 1")), [&](IP7_Trace *ptr) {
-            if (ptr)
-                ptr->Release();
-        });
-
-    if (!trace)
-    {
-        std::cout << "Can't create IP7_Trace" << std::endl;
-        return 1;
-    }
-
-    trace->Register_Thread(TM("Application"), 0);
-    trace->Register_Module(TM("Main"), &module);
-
-    auto start = clock::now();
-    for (int i = 0; i < howmany; ++i)
-        trace->P7_INFO(module, TM("p7 message #%d: This is some text for your pleasure"), i);
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    trace->Unregister_Thread(0);
-
-    return 0;
-}

bench/plog-bench-mt.cpp

@@ -1,61 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#include "plog/Log.h"
-
-using namespace std;
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    plog::init(plog::debug, "logs/plog-bench-mt.log");
-
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                LOG_INFO << "plog message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/plog-bench.cpp

@@ -1,34 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <chrono>
-#include <iostream>
-#include <memory>
-
-#include "plog/Log.h"
-
-int main(int, char *[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int howmany = 1000000;
-
-    plog::init(plog::debug, "logs/plog-bench.log");
-
-    auto start = clock::now();
-    for (int i = 0; i < howmany; ++i)
-        LOG_INFO << "plog message #" << i << ": This is some text for your pleasure";
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/spdlog-async.cpp

@@ -1,76 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <cstdlib>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#include "spdlog/spdlog.h"
-
-using namespace std;
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = std::atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    spdlog::set_async_mode(1000000);
-    auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("file_logger", "logs/spdlog-bench-async.log", true);
-    logger->set_pattern("[%Y-%m-%d %T.%F]: %L %t %v");
-
-    std::cout << "To stop, press <Enter>" << std::endl;
-    std::atomic<bool> run{true};
-    std::thread stoper(std::thread([&run]() {
-        std::cin.get();
-        run = false;
-    }));
-
-    while (run)
-    {
-        std::atomic<int> msg_counter{0};
-        std::vector<std::thread> threads;
-
-        auto start = clock::now();
-        for (int t = 0; t < thread_count; ++t)
-        {
-            threads.push_back(std::thread([&]() {
-                while (true)
-                {
-                    int counter = ++msg_counter;
-                    if (counter > howmany)
-                        break;
-                    logger->info("spdlog message #{}: This is some text for your pleasure", counter);
-                }
-            }));
-        }
-
-        for (auto &t : threads)
-        {
-            t.join();
-        }
-
-        duration<float> delta = clock::now() - start;
-        float deltaf = delta.count();
-        auto rate = howmany / deltaf;
-
-        std::cout << "Total: " << howmany << std::endl;
-        std::cout << "Threads: " << thread_count << std::endl;
-        std::cout << "Delta = " << std::fixed << deltaf << " seconds" << std::endl;
-        std::cout << "Rate = " << std::fixed << rate << "/sec" << std::endl;
-    } // while
-
-    stoper.join();
-
-    return 0;
-}

bench/spdlog-bench-mt.cpp

@@ -1,63 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <atomic>
-#include <chrono>
-#include <cstdlib>
-#include <iostream>
-#include <thread>
-#include <vector>
-
-#include "spdlog/spdlog.h"
-
-using namespace std;
-
-int main(int argc, char *argv[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int thread_count = 10;
-    if (argc > 1)
-        thread_count = std::atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("file_logger", "logs/spdlog-bench-mt.log", false);
-    logger->set_pattern("[%Y-%m-%d %T.%F]: %L %t %v");
-
-    std::atomic<int> msg_counter{0};
-    std::vector<thread> threads;
-
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                logger->info("spdlog message #{}: This is some text for your pleasure", counter);
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << std::fixed << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << std::fixed << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/spdlog-bench.cpp

@@ -1,34 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <chrono>
-#include <iostream>
-
-#include "spdlog/spdlog.h"
-
-int main(int, char *[])
-{
-    using namespace std::chrono;
-    using clock = steady_clock;
-
-    int howmany = 1000000;
-
-    auto logger = spdlog::create<spdlog::sinks::simple_file_sink_st>("file_logger", "logs/spdlog-bench.log", false);
-    logger->set_pattern("[%Y-%m-%d %T.%F]: %L %v");
-
-    auto start = clock::now();
-    for (int i = 0; i < howmany; ++i)
-        logger->info("spdlog message #{} : This is some text for your pleasure", i);
-
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany / deltaf;
-
-    std::cout << "Total: " << howmany << std::endl;
-    std::cout << "Delta = " << std::fixed << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << std::fixed << rate << "/sec" << std::endl;
-
-    return 0;
-}

bench/spdlog-null-async.cpp

@@ -1,103 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-//
-// bench.cpp : spdlog benchmarks
-//
-#include "spdlog/async_logger.h"
-#include "spdlog/sinks/null_sink.h"
-#include "spdlog/spdlog.h"
-#include "utils.h"
-#include <atomic>
-#include <cstdlib> // EXIT_FAILURE
-#include <iostream>
-#include <memory>
-#include <string>
-#include <thread>
-
-using namespace std;
-using namespace std::chrono;
-using namespace spdlog;
-using namespace spdlog::sinks;
-using namespace utils;
-
-size_t bench_as(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
-
-int main(int argc, char *argv[])
-{
-
-    int queue_size = 1048576;
-    int howmany = 1000000;
-    int threads = 10;
-    int iters = 10;
-
-    try
-    {
-
-        if (argc > 1)
-            howmany = atoi(argv[1]);
-        if (argc > 2)
-            threads = atoi(argv[2]);
-        if (argc > 3)
-            queue_size = atoi(argv[3]);
-
-        cout << "\n*******************************************************************************\n";
-        cout << "async logging.. " << threads << " threads sharing same logger, " << format(howmany) << " messages " << endl;
-        cout << "*******************************************************************************\n";
-
-        spdlog::set_async_mode(queue_size);
-
-        size_t total_rate = 0;
-
-        for (int i = 0; i < iters; ++i)
-        {
-            // auto as = spdlog::daily_logger_st("as", "logs/daily_async");
-            auto as = spdlog::create<null_sink_st>("async(null-sink)");
-            total_rate += bench_as(howmany, as, threads);
-            spdlog::drop("async(null-sink)");
-        }
-        std::cout << endl;
-        std::cout << "Avg rate: " << format(total_rate / iters) << "/sec" << std::endl;
-    }
-    catch (std::exception &ex)
-    {
-        std::cerr << "Error: " << ex.what() << std::endl;
-        perror("Last error");
-        return EXIT_FAILURE;
-    }
-    return EXIT_SUCCESS;
-}
-
-// return rate/sec
-size_t bench_as(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count)
-{
-    cout << log->name() << "...\t\t" << flush;
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-    auto start = system_clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            for (;;)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                log->info("Hello logger: msg number {}", counter);
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    }
-
-    auto delta = system_clock::now() - start;
-    auto delta_d = duration_cast<duration<double>>(delta).count();
-    auto per_sec = size_t(howmany / delta_d);
-    cout << format(per_sec) << "/sec" << endl;
-    return per_sec;
-}

cmake/Config.cmake.in

@@ -1,24 +0,0 @@
-# *************************************************************************/
-# * Copyright (c) 2015 Ruslan Baratov.                                    */
-# *                                                                       */
-# * Permission is hereby granted, free of charge, to any person obtaining */
-# * a copy of this software and associated documentation files (the       */
-# * "Software"), to deal in the Software without restriction, including   */
-# * without limitation the rights to use, copy, modify, merge, publish,   */
-# * distribute, sublicense, and/or sell copies of the Software, and to    */
-# * permit persons to whom the Software is furnished to do so, subject to */
-# * the following conditions:                                             */
-# *                                                                       */
-# * The above copyright notice and this permission notice shall be        */
-# * included in all copies or substantial portions of the Software.       */
-# *                                                                       */
-# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-# *************************************************************************/
-
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")

cmake/ide.cmake

@@ -0,0 +1,18 @@
+#---------------------------------------------------------------------------------------
+# IDE support for headers
+#---------------------------------------------------------------------------------------
+set(SPDLOG_HEADERS_DIR "${CMAKE_CURRENT_LIST_DIR}/../include")
+
+file(GLOB SPDLOG_TOP_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/*.h")
+file(GLOB SPDLOG_DETAILS_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/details/*.h")
+file(GLOB SPDLOG_SINKS_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/sinks/*.h")
+file(GLOB SPDLOG_FMT_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/fmt/*.h")
+file(GLOB SPDLOG_FMT_BUNDELED_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/fmt/bundled/*.h")
+set(SPDLOG_ALL_HEADERS ${SPDLOG_TOP_HEADERS} ${SPDLOG_DETAILS_HEADERS} ${SPDLOG_SINKS_HEADERS} ${SPDLOG_FMT_HEADERS} ${SPDLOG_FMT_BUNDELED_HEADERS})
+
+source_group("Header Files\\spdlog" FILES ${SPDLOG_TOP_HEADERS})
+source_group("Header Files\\spdlog\\details" FILES ${SPDLOG_DETAILS_HEADERS})
+source_group("Header Files\\spdlog\\sinks" FILES ${SPDLOG_SINKS_HEADERS})
+source_group("Header Files\\spdlog\\fmt" FILES ${SPDLOG_FMT_HEADERS})
+source_group("Header Files\\spdlog\\fmt\\bundled\\" FILES ${SPDLOG_FMT_BUNDELED_HEADERS})
+

cmake/spdlog.pc.in

@@ -1,6 +1,11 @@
 prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
 includedir=${prefix}/include
+libdir=${exec_prefix}/@CMAKE_INSTALL_LIBDIR@
 
-Name: @PROJECT_NAME@
-Description: Super fast C++ logging library. 
-Version: @PROJECT_VERSION@
+Name: lib@PROJECT_NAME@
+Description: Fast C++ logging library.
+URL: https://github.com/gabime/@PROJECT_NAME@
+Version: @SPDLOG_VERSION@
+CFlags: -I${includedir}/@SPDLOG_CFLAGS@
+Libs: -L${libdir}/@PROJECT_NAME@ -l@PROJECT_NAME@

cmake/spdlogCPack.cmake

@@ -0,0 +1,26 @@
+set(CPACK_GENERATOR
+    TGZ
+    ZIP
+    )
+
+set(CPACK_INCLUDE_TOPLEVEL_DIRECTORY 0)
+set(CPACK_INSTALL_CMAKE_PROJECTS
+    "${CMAKE_BINARY_DIR}"
+    "${PROJECT_NAME}"
+    ALL
+    .
+    )
+
+set(CPACK_PROJECT_URL "https://github.com/gabime/spdlog")
+set(CPACK_PACKAGE_VENDOR "Gabi Melman")
+set(CPACK_PACKAGE_CONTACT "Gabi Melman <gmelman1@gmail.com>")
+set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
+set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
+set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
+set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH})
+if (PROJECT_VERSION_TWEAK)
+    set(CPACK_PACKAGE_VERSION ${CPACK_PACKAGE_VERSION}.${PROJECT_VERSION_TWEAK})
+endif ()
+set(CPACK_PACKAGE_RELOCATABLE ON)
+
+include(CPack)

cmake/spdlogConfig.cmake.in

@@ -0,0 +1,15 @@
+# Copyright(c) 2019 spdlog authors
+# Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+find_package(Threads REQUIRED)
+
+set(SPDLOG_FMT_EXTERNAL @SPDLOG_FMT_EXTERNAL@)
+set(config_targets_file @config_targets_file@)
+
+if(SPDLOG_FMT_EXTERNAL)
+    include(CMakeFindDependencyMacro)
+    find_dependency(fmt CONFIG)
+endif()
+
+
+include("${CMAKE_CURRENT_LIST_DIR}/${config_targets_file}")

cmake/utils.cmake

@@ -0,0 +1,47 @@
+# Get spdlog version from include/spdlog/version.h and put it in SPDLOG_VERSION
+function(spdlog_extract_version)
+	file(READ "${CMAKE_CURRENT_LIST_DIR}/include/spdlog/version.h" file_contents)
+	string(REGEX MATCH "SPDLOG_VER_MAJOR ([0-9]+)" _  "${file_contents}")
+	if(NOT CMAKE_MATCH_COUNT EQUAL 1)
+        message(FATAL_ERROR "Could not extract major version number from spdlog/version.h")
+	endif()
+	set(ver_major ${CMAKE_MATCH_1})
+
+	string(REGEX MATCH "SPDLOG_VER_MINOR ([0-9]+)" _  "${file_contents}")
+	if(NOT CMAKE_MATCH_COUNT EQUAL 1)
+        message(FATAL_ERROR "Could not extract minor version number from spdlog/version.h")
+	endif()
+
+	set(ver_minor ${CMAKE_MATCH_1})
+	string(REGEX MATCH "SPDLOG_VER_PATCH ([0-9]+)" _  "${file_contents}")
+	if(NOT CMAKE_MATCH_COUNT EQUAL 1)
+        message(FATAL_ERROR "Could not extract patch version number from spdlog/version.h")
+	endif()
+	set(ver_patch ${CMAKE_MATCH_1})
+
+    set(SPDLOG_VERSION_MAJOR ${ver_major} PARENT_SCOPE)
+	set (SPDLOG_VERSION "${ver_major}.${ver_minor}.${ver_patch}" PARENT_SCOPE)
+endfunction()
+
+
+# Turn on warnings on the given target
+function(spdlog_enable_warnings target_name)
+    target_compile_options(${target_name} PRIVATE
+        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>>:
+            -Wall -Wextra -Wconversion -pedantic -Wfatal-errors>
+        $<$<CXX_COMPILER_ID:MSVC>:/W4 /WX>)
+endfunction()
+
+
+# Enable address sanitizer (gcc/clang only)
+function(spdlog_enable_sanitizer target_name)
+	if (NOT CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+		message(FATAL_ERROR "Sanitizer supported only for gcc/clang")
+	endif()
+	message(STATUS "Address sanitizer enabled")
+	target_compile_options(${target_name} PRIVATE -fsanitize=address,undefined)
+	target_compile_options(${target_name} PRIVATE -fno-sanitize=signed-integer-overflow)
+	target_compile_options(${target_name} PRIVATE -fno-sanitize-recover=all)
+	target_compile_options(${target_name} PRIVATE -fno-omit-frame-pointer)
+	target_link_libraries(${target_name} PRIVATE -fsanitize=address,undefined -fuse-ld=gold)
+endfunction()

example/CMakeLists.txt

@@ -1,49 +1,29 @@
-# *************************************************************************/
-# * Copyright (c) 2015 Ruslan Baratov.                                    */
-# *                                                                       */
-# * Permission is hereby granted, free of charge, to any person obtaining */
-# * a copy of this software and associated documentation files (the       */
-# * "Software"), to deal in the Software without restriction, including   */
-# * without limitation the rights to use, copy, modify, merge, publish,   */
-# * distribute, sublicense, and/or sell copies of the Software, and to    */
-# * permit persons to whom the Software is furnished to do so, subject to */
-# * the following conditions:                                             */
-# *                                                                       */
-# * The above copyright notice and this permission notice shall be        */
-# * included in all copies or substantial portions of the Software.       */
-# *                                                                       */
-# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-# *************************************************************************/
+# Copyright(c) 2019 spdlog authors
+# Distributed under the MIT License (http://opensource.org/licenses/MIT)
 
 cmake_minimum_required(VERSION 3.1)
-project(SpdlogExamples CXX)
+project(spdlog_examples CXX)
 
-if(TARGET spdlog)
-  # Part of the main project
-  add_library(spdlog::spdlog ALIAS spdlog)
-else()
+if(NOT TARGET spdlog)
     # Stand-alone build
-  find_package(spdlog CONFIG REQUIRED)
+    find_package(spdlog REQUIRED)
 endif()
 
-find_package(Threads REQUIRED)
-
+#---------------------------------------------------------------------------------------
+# Example of using pre-compiled library
+#---------------------------------------------------------------------------------------
 add_executable(example example.cpp)
-target_link_libraries(example spdlog::spdlog Threads::Threads)
+spdlog_enable_warnings(example)
+target_link_libraries(example PRIVATE spdlog::spdlog)
 
-add_executable(benchmark bench.cpp)
-target_link_libraries(benchmark spdlog::spdlog Threads::Threads)
+#---------------------------------------------------------------------------------------
+# Example of using header-only library
+#---------------------------------------------------------------------------------------
+if(SPDLOG_BUILD_EXAMPLE_HO)
+    add_executable(example_header_only example.cpp)
+    spdlog_enable_warnings(example_header_only)
+    target_link_libraries(example_header_only PRIVATE spdlog::spdlog_header_only)
+endif()
 
-add_executable(multisink multisink.cpp)
-target_link_libraries(multisink spdlog::spdlog Threads::Threads)
-
-enable_testing()
+# Create logs directory
 file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")
-add_test(NAME RunExample COMMAND example)
-add_test(NAME RunBenchmark COMMAND benchmark)

example/Makefile

@@ -1,29 +0,0 @@
-CXX	?= g++
-CXXFLAGS	=
-CXX_FLAGS = -Wall -Wshadow -Wextra -pedantic -std=c++11 -pthread -I../include
-CXX_RELEASE_FLAGS = -O3 -march=native
-CXX_DEBUG_FLAGS= -g
-
-
-all:	example bench
-debug:	example-debug bench-debug
-
-example: example.cpp
-	$(CXX) example.cpp -o example $(CXX_FLAGS) $(CXX_RELEASE_FLAGS) $(CXXFLAGS)
-
-bench: bench.cpp
-	$(CXX) bench.cpp -o bench $(CXX_FLAGS) $(CXX_RELEASE_FLAGS) $(CXXFLAGS)
-
-
-example-debug: example.cpp
-	$(CXX) example.cpp -o example-debug $(CXX_FLAGS) $(CXX_DEBUG_FLAGS) $(CXXFLAGS)
-
-bench-debug: bench.cpp
-	$(CXX) bench.cpp -o bench-debug $(CXX_FLAGS) $(CXX_DEBUG_FLAGS) $(CXXFLAGS)
-
-clean:
-	rm -f *.o logs/*.txt example example-debug bench bench-debug
-
-
-rebuild: clean all
-rebuild-debug: clean debug

example/Makefile.clang

@@ -1,32 +0,0 @@
-CXX	= clang++
-CXXFLAGS	= -march=native -Wall -Wextra -Wshadow -pedantic -std=c++11 -pthread -I../include
-CXX_RELEASE_FLAGS = -O2
-CXX_DEBUG_FLAGS= -g 
-
-
-all:	example bench
-debug: example-debug bench-debug
-
-example: example.cpp
-	$(CXX) example.cpp -o example-clang $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-
-bench: bench.cpp
-	$(CXX) bench.cpp -o bench-clang $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-example-debug: example.cpp
-	$(CXX) example.cpp -o example-clang-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)
-	
-bench-debug: bench.cpp
-	$(CXX) bench.cpp -o bench-clang-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)	
-
-
-
-clean:
-	rm -f *.o logs/*.txt example-clang example-clang-debug bench-clang bench-clang-debug 
-
-
-rebuild: clean all
-rebuild-debug: clean debug
-
-

example/Makefile.mingw

@@ -1,32 +0,0 @@
-CXX	?= g++
-CXXFLAGS	=  -D_WIN32_WINNT=0x600 -march=native -Wall -Wextra -Wshadow -pedantic -std=gnu++0x -pthread -Wl,--no-as-needed  -I../include 
-CXX_RELEASE_FLAGS = -O3 
-CXX_DEBUG_FLAGS= -g 
-
-
-all:	example bench
-debug: example-debug bench-debug
-
-example: example.cpp
-	$(CXX) example.cpp -o example $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-
-bench: bench.cpp
-	$(CXX) bench.cpp -o bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-example-debug: example.cpp
-	$(CXX) example.cpp -o example-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)
-	
-bench-debug: bench.cpp
-	$(CXX) bench.cpp -o bench-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)	
-
-
-
-clean:
-	rm -f *.o logs/*.txt example example-debug bench bench-debug 
-
-
-rebuild: clean all
-rebuild-debug: clean debug
-
-

example/bench.cpp

@@ -1,134 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-//
-// bench.cpp : spdlog benchmarks
-//
-#include "spdlog/async_logger.h"
-#include "spdlog/sinks/file_sinks.h"
-#include "spdlog/sinks/null_sink.h"
-#include "spdlog/spdlog.h"
-#include "utils.h"
-#include <atomic>
-#include <cstdlib> // EXIT_FAILURE
-#include <iostream>
-#include <memory>
-#include <string>
-#include <thread>
-
-using namespace std;
-using namespace std::chrono;
-using namespace spdlog;
-using namespace spdlog::sinks;
-using namespace utils;
-
-void bench(int howmany, std::shared_ptr<spdlog::logger> log);
-void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
-
-int main(int argc, char *argv[])
-{
-
-    int queue_size = 1048576;
-    int howmany = 1000000;
-    int threads = 10;
-    int file_size = 30 * 1024 * 1024;
-    int rotating_files = 5;
-
-    try
-    {
-
-        if (argc > 1)
-            howmany = atoi(argv[1]);
-        if (argc > 2)
-            threads = atoi(argv[2]);
-        if (argc > 3)
-            queue_size = atoi(argv[3]);
-
-        cout << "*******************************************************************************\n";
-        cout << "Single thread, " << format(howmany) << " iterations" << endl;
-        cout << "*******************************************************************************\n";
-
-        auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st.log", file_size, rotating_files);
-        bench(howmany, rotating_st);
-        auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st.log");
-        bench(howmany, daily_st);
-        bench(howmany, spdlog::create<null_sink_st>("null_st"));
-
-        cout << "\n*******************************************************************************\n";
-        cout << threads << " threads sharing same logger, " << format(howmany) << " iterations" << endl;
-        cout << "*******************************************************************************\n";
-
-        auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt.log", file_size, rotating_files);
-        bench_mt(howmany, rotating_mt, threads);
-
-        auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt.log");
-        bench_mt(howmany, daily_mt, threads);
-        bench(howmany, spdlog::create<null_sink_st>("null_mt"));
-
-        cout << "\n*******************************************************************************\n";
-        cout << "async logging.. " << threads << " threads sharing same logger, " << format(howmany) << " iterations " << endl;
-        cout << "*******************************************************************************\n";
-
-        spdlog::set_async_mode(queue_size);
-
-        for (int i = 0; i < 3; ++i)
-        {
-            auto as = spdlog::daily_logger_st("as", "logs/daily_async.log");
-            bench_mt(howmany, as, threads);
-            spdlog::drop("as");
-        }
-    }
-    catch (std::exception &ex)
-    {
-        std::cerr << "Error: " << ex.what() << std::endl;
-        perror("Last error");
-        return EXIT_FAILURE;
-    }
-    return EXIT_SUCCESS;
-}
-
-void bench(int howmany, std::shared_ptr<spdlog::logger> log)
-{
-    cout << log->name() << "...\t\t" << flush;
-    auto start = system_clock::now();
-    for (auto i = 0; i < howmany; ++i)
-    {
-        log->info("Hello logger: msg number {}", i);
-    }
-
-    auto delta = system_clock::now() - start;
-    auto delta_d = duration_cast<duration<double>>(delta).count();
-    cout << "Elapsed: " << delta_d << "\t" << format(int(howmany / delta_d)) << "/sec" << endl;
-}
-
-void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count)
-{
-
-    cout << log->name() << "...\t\t" << flush;
-    std::atomic<int> msg_counter{0};
-    vector<thread> threads;
-    auto start = system_clock::now();
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]() {
-            for (;;)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany)
-                    break;
-                log->info("Hello logger: msg number {}", counter);
-            }
-        }));
-    }
-
-    for (auto &t : threads)
-    {
-        t.join();
-    };
-
-    auto delta = system_clock::now() - start;
-    auto delta_d = duration_cast<duration<double>>(delta).count();
-    cout << "Elapsed: " << delta_d << "\t" << format(int(howmany / delta_d)) << "/sec" << endl;
-}

example/example.cpp

@@ -1,140 +1,193 @@
 //
 // Copyright(c) 2015 Gabi Melman.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-//
-// spdlog usage example
-//
-//
 
-#define SPDLOG_TRACE_ON
-#define SPDLOG_DEBUG_ON
+// spdlog usage example
+
+#include <cstdio>
+
+void stdout_logger_example();
+void basic_example();
+void rotating_example();
+void daily_example();
+void async_example();
+void binary_example();
+void trace_example();
+void multi_sink_example();
+void user_defined_example();
+void err_handler_example();
+void syslog_example();
 
 #include "spdlog/spdlog.h"
 
-#include <iostream>
-#include <memory>
-
-void async_example();
-void syslog_example();
-void android_example();
-void user_defined_example();
-void err_handler_example();
-
-namespace spd = spdlog;
 int main(int, char *[])
 {
-    try
-    {
-        // Console logger with color
-        auto console = spd::stdout_color_mt("console");
-        console->info("Welcome to spdlog!");
-        console->error("Some error message with arg{}..", 1);
-
-        // Formatting examples
-        console->warn("Easy padding in numbers like {:08d}", 12);
-        console->critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
-        console->info("Support for floats {:03.2f}", 1.23456);
-        console->info("Positional args are {1} {0}..", "too", "supported");
-        console->info("{:<30}", "left aligned");
-
-        spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
-
-        // Create basic file logger (not rotated)
-        auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic-log.txt");
-        my_logger->info("Some log message");
-
-        // Create a file rotating logger with 5mb size max and 3 rotated files
-        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
-        for (int i = 0; i < 10; ++i)
-        {
-            rotating_logger->info("{} * {} equals {:>10}", i, i, i * i);
-        }
-
-        // Create a daily logger - a new file is created every day on 2:30am
-        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
-        // trigger flush if the log severity is error or higher
-        daily_logger->flush_on(spd::level::err);
-        daily_logger->info(123.44);
-
-        // Customize msg format for all messages
-        spd::set_pattern("[%^+++%$] [%H:%M:%S %z] [thread %t] %v");
-        console->info("This an info message with custom format");
-        console->error("This an error message with custom format");
+    spdlog::info("Welcome to spdlog version {}.{}.{}  !", SPDLOG_VER_MAJOR, SPDLOG_VER_MINOR, SPDLOG_VER_PATCH);
+    spdlog::warn("Easy padding in numbers like {:08d}", 12);
+    spdlog::critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+    spdlog::info("Support for floats {:03.2f}", 1.23456);
+    spdlog::info("Positional args are {1} {0}..", "too", "supported");
+    spdlog::info("{:>8} aligned, {:<8} aligned", "right", "left");
 
     // Runtime log levels
-        spd::set_level(spd::level::info); // Set global log level to info
-        console->debug("This message should not be displayed!");
-        console->set_level(spd::level::debug); // Set specific logger's log level
-        console->debug("This message should be displayed..");
+    spdlog::set_level(spdlog::level::info); // Set global log level to info
+    spdlog::debug("This message should not be displayed!");
+    spdlog::set_level(spdlog::level::trace); // Set specific logger's log level
+    spdlog::debug("This message should be displayed..");
 
-        // Compile time log levels
-        // define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON
-        SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
-        SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
+    // Customize msg format for all loggers
+    spdlog::set_pattern("[%H:%M:%S %z] [%^%L%$] [thread %t] %v");
+    spdlog::info("This an info message with custom format");
+    spdlog::set_pattern("%+"); // back to default format
+    spdlog::set_level(spdlog::level::info);
 
-        // Asynchronous logging is very fast..
-        // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
-        async_example();
-
-        // syslog example. linux/osx only
-        syslog_example();
-
-        // android example. compile with NDK
-        android_example();
-
-        // Log user-defined types example
-        user_defined_example();
-
-        // Change default log error handler
-        err_handler_example();
-
-        // Apply a function on all registered loggers
-        spd::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of example."); });
-
-        // Release and close all loggers
-        spdlog::drop_all();
-    }
-    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
-    catch (const spd::spdlog_ex &ex)
+    // Backtrace support
+    // Loggers can store in a ring buffer all messages (including debug/trace) for later inspection.
+    // When needed, call dump_backtrace() to see what happened:
+    spdlog::enable_backtrace(10); // create ring buffer with capacity of 10  messages
+    for (int i = 0; i < 100; i++)
     {
-        std::cout << "Log init failed: " << ex.what() << std::endl;
+        spdlog::debug("Backtrace message {}", i); // not logged..
+    }
+    // e.g. if some error happened:
+    spdlog::dump_backtrace(); // log them now!
+
+    try
+    {
+        stdout_logger_example();
+        basic_example();
+        rotating_example();
+        daily_example();
+        async_example();
+        binary_example();
+        multi_sink_example();
+        user_defined_example();
+        err_handler_example();
+        trace_example();
+
+        // Flush all *registered* loggers using a worker thread every 3 seconds.
+        // note: registered loggers *must* be thread safe for this to work correctly!
+        spdlog::flush_every(std::chrono::seconds(3));
+
+        // Apply some function on all registered loggers
+        spdlog::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of example."); });
+
+        // Release all spdlog resources, and drop all loggers in the registry.
+        // This is optional (only mandatory if using windows + async log).
+        spdlog::shutdown();
+    }
+
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging).
+    catch (const spdlog::spdlog_ex &ex)
+    {
+        std::printf("Log initialization failed: %s\n", ex.what());
         return 1;
     }
 }
 
+#include "spdlog/sinks/stdout_color_sinks.h"
+// or #include "spdlog/sinks/stdout_sinks.h" if no colors needed.
+void stdout_logger_example()
+{
+    // Create color multi threaded logger.
+    auto console = spdlog::stdout_color_mt("console");
+    // or for stderr:
+    // auto console = spdlog::stderr_color_mt("error-logger");
+}
+
+#include "spdlog/sinks/basic_file_sink.h"
+void basic_example()
+{
+    // Create basic file logger (not rotated).
+    auto my_logger = spdlog::basic_logger_mt("file_logger", "logs/basic-log.txt");
+}
+
+#include "spdlog/sinks/rotating_file_sink.h"
+void rotating_example()
+{
+    // Create a file rotating logger with 5mb size max and 3 rotated files.
+    auto rotating_logger = spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
+}
+
+#include "spdlog/sinks/daily_file_sink.h"
+void daily_example()
+{
+    // Create a daily logger - a new file is created every day on 2:30am.
+    auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+}
+
+#include "spdlog/async.h"
 void async_example()
 {
-    size_t q_size = 4096;
-    spdlog::set_async_mode(q_size);
-    auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
-    for (int i = 0; i < 100; ++i)
+    // Default thread pool settings can be modified *before* creating the async logger:
+    // spdlog::init_thread_pool(32768, 1); // queue with max 32k items 1 backing thread.
+    auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
+    // alternatively:
+    // auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");
+
+    for (int i = 1; i < 101; ++i)
     {
         async_file->info("Async message #{}", i);
     }
 }
 
-// syslog example (linux/osx/freebsd)
-void syslog_example()
+// Log binary data as hex.
+// Many types of std::container<char> types can be used.
+// Iterator ranges are supported too.
+// Format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+#include "spdlog/fmt/bin_to_hex.h"
+void binary_example()
 {
-#ifdef SPDLOG_ENABLE_SYSLOG
-    std::string ident = "spdlog-example";
-    auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
-    syslog_logger->warn("This is warning that will end up in syslog.");
-#endif
+    std::vector<char> buf;
+    for (int i = 0; i < 80; i++)
+    {
+        buf.push_back(static_cast<char>(i & 0xff));
+    }
+    spdlog::info("Binary example: {}", spdlog::to_hex(buf));
+    spdlog::info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
+    // more examples:
+    // logger->info("uppercase: {:X}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters, no position info: {:Xsp}", spdlog::to_hex(buf));
 }
 
-// Android example
-void android_example()
+// Compile time log levels.
+// define SPDLOG_ACTIVE_LEVEL to required level (e.g. SPDLOG_LEVEL_TRACE)
+void trace_example()
 {
-#if defined(__ANDROID__)
-    std::string tag = "spdlog-android";
-    auto android_logger = spd::android_logger("android", tag);
-    android_logger->critical("Use \"adb shell logcat\" to view this message.");
-#endif
+    // trace from default logger
+    SPDLOG_TRACE("Some trace message.. {} ,{}", 1, 3.23);
+    // debug from default logger
+    SPDLOG_DEBUG("Some debug message.. {} ,{}", 1, 3.23);
+
+    // trace from logger object
+    auto logger = spdlog::get("file_logger");
+    SPDLOG_LOGGER_TRACE(logger, "another trace message");
 }
 
-// user defined types logging by implementing operator<<
+// A logger with multiple sinks (stdout and file) - each with a different format and log level.
+void multi_sink_example()
+{
+    auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
+    console_sink->set_level(spdlog::level::warn);
+    console_sink->set_pattern("[multi_sink_example] [%^%l%$] %v");
+
+    auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", true);
+    file_sink->set_level(spdlog::level::trace);
+
+    spdlog::logger logger("multi_sink", {console_sink, file_sink});
+    logger.set_level(spdlog::level::debug);
+    logger.warn("this should appear in both console and file");
+    logger.info("this message should not appear in the console, only in the file");
+}
+
+// User defined types logging by implementing operator<<
+#include "spdlog/fmt/ostr.h" // must be included
 struct my_type
 {
     int i;
@@ -145,18 +198,37 @@ struct my_type
     }
 };
 
-#include "spdlog/fmt/ostr.h" // must be included
 void user_defined_example()
 {
-    spd::get("console")->info("user defined type: {}", my_type{14});
+    spdlog::info("user defined type: {}", my_type{14});
 }
 
-//
-// custom error handler
-//
+// Custom error handler. Will be triggered on log failure.
 void err_handler_example()
 {
-    // can be set globaly or per logger(logger->set_error_handler(..))
-    spdlog::set_error_handler([](const std::string &msg) { std::cerr << "my err handler: " << msg << std::endl; });
-    spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
+    // can be set globally or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { printf("*** Custom log error handler: %s ***\n", msg.c_str()); });
 }
+
+// syslog example (linux/osx/freebsd)
+#ifndef _WIN32
+#include "spdlog/sinks/syslog_sink.h"
+void syslog_example()
+{
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spdlog::syslog_logger_mt("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog.");
+}
+#endif
+
+// Android example.
+#if defined(__ANDROID__)
+#include "spdlog/sinks/android_sink.h"
+void android_example()
+{
+    std::string tag = "spdlog-android";
+    auto android_logger = spdlog::android_logger_mt("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
+}
+
+#endif

example/example.sln

@@ -1,110 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.27428.2037
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example", "example.vcxproj", "{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}"
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "spdlog", "spdlog", "{319A0767-E66D-4DD0-8BEF-E29E891BA836}"
-	ProjectSection(SolutionItems) = preProject
-		..\include\spdlog\async_logger.h = ..\include\spdlog\async_logger.h
-		..\include\spdlog\common.h = ..\include\spdlog\common.h
-		..\include\spdlog\formatter.h = ..\include\spdlog\formatter.h
-		..\include\spdlog\logger.h = ..\include\spdlog\logger.h
-		..\include\spdlog\spdlog.h = ..\include\spdlog\spdlog.h
-		..\include\spdlog\tweakme.h = ..\include\spdlog\tweakme.h
-	EndProjectSection
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "contrib", "contrib", "{F1B153FB-7638-4F2B-B6FF-F56859D381F9}"
-	ProjectSection(SolutionItems) = preProject
-		..\include\spdlog\contrib\README.md = ..\include\spdlog\contrib\README.md
-	EndProjectSection
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sinks", "sinks", "{9B3669F7-6D70-4699-9067-451E9298BA53}"
-	ProjectSection(SolutionItems) = preProject
-		..\include\spdlog\contrib\sinks\.gitignore = ..\include\spdlog\contrib\sinks\.gitignore
-		..\include\spdlog\contrib\sinks\step_file_sink.h = ..\include\spdlog\contrib\sinks\step_file_sink.h
-	EndProjectSection
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "details", "details", "{579FDBF1-8FCD-4F1D-99F1-540F2EFF95E0}"
-	ProjectSection(SolutionItems) = preProject
-		..\include\spdlog\details\async_log_helper.h = ..\include\spdlog\details\async_log_helper.h
-		..\include\spdlog\details\async_logger_impl.h = ..\include\spdlog\details\async_logger_impl.h
-		..\include\spdlog\details\file_helper.h = ..\include\spdlog\details\file_helper.h
-		..\include\spdlog\details\log_msg.h = ..\include\spdlog\details\log_msg.h
-		..\include\spdlog\details\logger_impl.h = ..\include\spdlog\details\logger_impl.h
-		..\include\spdlog\details\mpmc_blocking_q.h = ..\include\spdlog\details\mpmc_blocking_q.h
-		..\include\spdlog\details\null_mutex.h = ..\include\spdlog\details\null_mutex.h
-		..\include\spdlog\details\os.h = ..\include\spdlog\details\os.h
-		..\include\spdlog\details\pattern_formatter_impl.h = ..\include\spdlog\details\pattern_formatter_impl.h
-		..\include\spdlog\details\registry.h = ..\include\spdlog\details\registry.h
-		..\include\spdlog\details\spdlog_impl.h = ..\include\spdlog\details\spdlog_impl.h
-	EndProjectSection
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "fmt", "fmt", "{2034E575-9375-4AE7-B667-AF4A359F1483}"
-	ProjectSection(SolutionItems) = preProject
-		..\include\spdlog\fmt\fmt.h = ..\include\spdlog\fmt\fmt.h
-		..\include\spdlog\fmt\ostr.h = ..\include\spdlog\fmt\ostr.h
-	EndProjectSection
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "bundled", "bundled", "{16763E99-3CC7-4C46-8F79-259356FF0B37}"
-	ProjectSection(SolutionItems) = preProject
-		..\include\spdlog\fmt\bundled\format.cc = ..\include\spdlog\fmt\bundled\format.cc
-		..\include\spdlog\fmt\bundled\format.h = ..\include\spdlog\fmt\bundled\format.h
-		..\include\spdlog\fmt\bundled\LICENSE.rst = ..\include\spdlog\fmt\bundled\LICENSE.rst
-		..\include\spdlog\fmt\bundled\ostream.cc = ..\include\spdlog\fmt\bundled\ostream.cc
-		..\include\spdlog\fmt\bundled\ostream.h = ..\include\spdlog\fmt\bundled\ostream.h
-		..\include\spdlog\fmt\bundled\posix.cc = ..\include\spdlog\fmt\bundled\posix.cc
-		..\include\spdlog\fmt\bundled\posix.h = ..\include\spdlog\fmt\bundled\posix.h
-		..\include\spdlog\fmt\bundled\printf.cc = ..\include\spdlog\fmt\bundled\printf.cc
-		..\include\spdlog\fmt\bundled\printf.h = ..\include\spdlog\fmt\bundled\printf.h
-		..\include\spdlog\fmt\bundled\time.h = ..\include\spdlog\fmt\bundled\time.h
-	EndProjectSection
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sinks", "sinks", "{13310FA4-52E7-46BA-B071-B72B1D8E44D9}"
-	ProjectSection(SolutionItems) = preProject
-		..\include\spdlog\sinks\android_sink.h = ..\include\spdlog\sinks\android_sink.h
-		..\include\spdlog\sinks\ansicolor_sink.h = ..\include\spdlog\sinks\ansicolor_sink.h
-		..\include\spdlog\sinks\base_sink.h = ..\include\spdlog\sinks\base_sink.h
-		..\include\spdlog\sinks\dist_sink.h = ..\include\spdlog\sinks\dist_sink.h
-		..\include\spdlog\sinks\file_sinks.h = ..\include\spdlog\sinks\file_sinks.h
-		..\include\spdlog\sinks\msvc_sink.h = ..\include\spdlog\sinks\msvc_sink.h
-		..\include\spdlog\sinks\null_sink.h = ..\include\spdlog\sinks\null_sink.h
-		..\include\spdlog\sinks\ostream_sink.h = ..\include\spdlog\sinks\ostream_sink.h
-		..\include\spdlog\sinks\sink.h = ..\include\spdlog\sinks\sink.h
-		..\include\spdlog\sinks\stdout_sinks.h = ..\include\spdlog\sinks\stdout_sinks.h
-		..\include\spdlog\sinks\syslog_sink.h = ..\include\spdlog\sinks\syslog_sink.h
-		..\include\spdlog\sinks\wincolor_sink.h = ..\include\spdlog\sinks\wincolor_sink.h
-		..\include\spdlog\sinks\windebug_sink.h = ..\include\spdlog\sinks\windebug_sink.h
-	EndProjectSection
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Win32 = Debug|Win32
-		Debug|x64 = Debug|x64
-		Release|Win32 = Release|Win32
-		Release|x64 = Release|x64
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Debug|Win32.ActiveCfg = Debug|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Debug|Win32.Build.0 = Debug|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Debug|x64.ActiveCfg = Debug|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|Win32.ActiveCfg = Release|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|Win32.Build.0 = Release|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|x64.ActiveCfg = Release|Win32
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(NestedProjects) = preSolution
-		{F1B153FB-7638-4F2B-B6FF-F56859D381F9} = {319A0767-E66D-4DD0-8BEF-E29E891BA836}
-		{9B3669F7-6D70-4699-9067-451E9298BA53} = {F1B153FB-7638-4F2B-B6FF-F56859D381F9}
-		{579FDBF1-8FCD-4F1D-99F1-540F2EFF95E0} = {319A0767-E66D-4DD0-8BEF-E29E891BA836}
-		{2034E575-9375-4AE7-B667-AF4A359F1483} = {319A0767-E66D-4DD0-8BEF-E29E891BA836}
-		{16763E99-3CC7-4C46-8F79-259356FF0B37} = {2034E575-9375-4AE7-B667-AF4A359F1483}
-		{13310FA4-52E7-46BA-B071-B72B1D8E44D9} = {319A0767-E66D-4DD0-8BEF-E29E891BA836}
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {8C12721F-513C-4922-B2F8-B9F2403412B4}
-	EndGlobalSection
-EndGlobal

example/example.vcxproj

@@ -1,93 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <ItemGroup>
-    <ClCompile Include="example.cpp" />
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <ProjectGuid>{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}</ProjectGuid>
-    <Keyword>Win32Proj</Keyword>
-    <RootNamespace>.</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.16299.0</WindowsTargetPlatformVersion>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <ImportGroup Label="ExtensionSettings">
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <LinkIncremental>true</LinkIncremental>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <LinkIncremental>false</LinkIncremental>
-  </PropertyGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <ClCompile>
-      <PrecompiledHeader>
-      </PrecompiledHeader>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <AdditionalIncludeDirectories>..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PrecompiledHeaderFile />
-      <PrecompiledHeaderOutputFile />
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <PrecompiledHeader>
-      </PrecompiledHeader>
-      <Optimization>MaxSpeed</Optimization>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <AdditionalIncludeDirectories>..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PrecompiledHeaderFile />
-      <PrecompiledHeaderOutputFile />
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalLibraryDirectories>%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <AdditionalDependencies>%(AdditionalDependencies)</AdditionalDependencies>
-    </Link>
-  </ItemDefinitionGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <ImportGroup Label="ExtensionTargets">
-  </ImportGroup>
-</Project>

example/jni/Android.mk

@@ -1,15 +0,0 @@
-# Setup a project
-LOCAL_PATH := $(call my-dir)
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := example
-LOCAL_SRC_FILES := example.cpp
-LOCAL_CPPFLAGS += -Wall -Wshadow -Wextra -pedantic -std=c++11 -fPIE -pie
-LOCAL_LDFLAGS +=  -fPIE -pie
-
-# Add exception support and set path for spdlog's headers
-LOCAL_CPPFLAGS += -fexceptions -I../include
-# Use android's log library
-LOCAL_LDFLAGS += -llog
-
-include $(BUILD_EXECUTABLE)

example/jni/Application.mk

@@ -1,2 +0,0 @@
-# Exceptions are used in spdlog. Link to an exception-ready C++ runtime.
-APP_STL = gnustl_static

example/jni/example.cpp

@@ -1,157 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-//
-// spdlog usage example
-//
-//
-
-#define SPDLOG_TRACE_ON
-#define SPDLOG_DEBUG_ON
-
-#include "spdlog/spdlog.h"
-
-#include <iostream>
-#include <memory>
-
-void async_example();
-void syslog_example();
-void android_example();
-void user_defined_example();
-void err_handler_example();
-
-namespace spd = spdlog;
-int main(int, char *[])
-{
-    try
-    {
-        // Console logger with color
-        auto console = spd::stdout_color_mt("console");
-        console->info("Welcome to spdlog!");
-        console->error("Some error message with arg{}..", 1);
-
-        // Formatting examples
-        console->warn("Easy padding in numbers like {:08d}", 12);
-        console->critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
-        console->info("Support for floats {:03.2f}", 1.23456);
-        console->info("Positional args are {1} {0}..", "too", "supported");
-        console->info("{:<30}", "left aligned");
-
-        spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
-
-        // Create basic file logger (not rotated)
-        auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic-log.txt");
-        my_logger->info("Some log message");
-
-        // Create a file rotating logger with 5mb size max and 3 rotated files
-        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
-        for (int i = 0; i < 10; ++i)
-            rotating_logger->info("{} * {} equals {:>10}", i, i, i * i);
-
-        // Create a daily logger - a new file is created every day on 2:30am
-        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
-        // trigger flush if the log severity is error or higher
-        daily_logger->flush_on(spd::level::err);
-        daily_logger->info(123.44);
-
-        // Customize msg format for all messages
-        spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
-        rotating_logger->info("This is another message with custom format");
-
-        // Runtime log levels
-        spd::set_level(spd::level::info); // Set global log level to info
-        console->debug("This message should not be displayed!");
-        console->set_level(spd::level::debug); // Set specific logger's log level
-        console->debug("This message should be displayed..");
-
-        // Compile time log levels
-        // define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON
-        SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
-        SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
-
-        // Asynchronous logging is very fast..
-        // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
-        async_example();
-
-        // syslog example. linux/osx only
-        syslog_example();
-
-        // android example. compile with NDK
-        android_example();
-
-        // Log user-defined types example
-        user_defined_example();
-
-        // Change default log error handler
-        err_handler_example();
-
-        // Apply a function on all registered loggers
-        spd::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of example."); });
-
-        // Release and close all loggers
-        spdlog::drop_all();
-    }
-    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
-    catch (const spd::spdlog_ex &ex)
-    {
-        std::cout << "Log init failed: " << ex.what() << std::endl;
-        return 1;
-    }
-}
-
-void async_example()
-{
-    size_t q_size = 4096; // queue size must be power of 2
-    spdlog::set_async_mode(q_size);
-    auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
-    for (int i = 0; i < 100; ++i)
-        async_file->info("Async message #{}", i);
-}
-
-// syslog example (linux/osx/freebsd)
-void syslog_example()
-{
-#ifdef SPDLOG_ENABLE_SYSLOG
-    std::string ident = "spdlog-example";
-    auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
-    syslog_logger->warn("This is warning that will end up in syslog.");
-#endif
-}
-
-// Android example
-void android_example()
-{
-#if defined(__ANDROID__)
-    std::string tag = "spdlog-android";
-    auto android_logger = spd::android_logger("android", tag);
-    android_logger->critical("Use \"adb shell logcat\" to view this message.");
-#endif
-}
-
-// user defined types logging by implementing operator<<
-struct my_type
-{
-    int i;
-    template<typename OStream>
-    friend OStream &operator<<(OStream &os, const my_type &c)
-    {
-        return os << "[my_type i=" << c.i << "]";
-    }
-};
-
-#include "spdlog/fmt/ostr.h" // must be included
-void user_defined_example()
-{
-    spd::get("console")->info("user defined type: {}", my_type{14});
-}
-
-//
-// custom error handler
-//
-void err_handler_example()
-{
-    // can be set globaly or per logger(logger->set_error_handler(..))
-    spdlog::set_error_handler([](const std::string &msg) { std::cerr << "my err handler: " << msg << std::endl; });
-    spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
-}

example/logs/.gitignore

@@ -1 +0,0 @@
-*.txt

example/meson.build

@@ -0,0 +1,5 @@
+executable('example', 'example.cpp', dependencies: spdlog_dep)
+executable('example_header_only', 'example.cpp', dependencies: spdlog_headeronly_dep)
+run_command(find_program('mkdir'), meson.current_build_dir() + '/logs')
+
+

example/multisink.cpp

@@ -1,46 +0,0 @@
-#include "spdlog/spdlog.h"
-
-#include <iostream>
-#include <memory>
-
-namespace spd = spdlog;
-int main(int, char *[])
-{
-    bool enable_debug = true;
-    try
-    {
-        // This other example use a single logger with multiple sinks.
-        // This means that the same log_msg is forwarded to multiple sinks;
-        // Each sink can have it's own log level and a message will be logged.
-        std::vector<spdlog::sink_ptr> sinks;
-        sinks.push_back(std::make_shared<spdlog::sinks::stdout_sink_mt>());
-        sinks.push_back(std::make_shared<spdlog::sinks::simple_file_sink_mt>("./log_regular_file.txt"));
-        sinks.push_back(std::make_shared<spdlog::sinks::simple_file_sink_mt>("./log_debug_file.txt"));
-
-        spdlog::logger console_multisink("multisink", sinks.begin(), sinks.end());
-        console_multisink.set_level(spdlog::level::warn);
-
-        sinks[0]->set_level(spdlog::level::trace); // console. Allow everything.  Default value
-        sinks[1]->set_level(spdlog::level::trace); //  regular file. Allow everything.  Default value
-        sinks[2]->set_level(spdlog::level::off);   //  regular file. Ignore everything.
-
-        console_multisink.warn("warn: will print only on console and regular file");
-
-        if (enable_debug)
-        {
-            console_multisink.set_level(spdlog::level::debug); // level of the logger
-            sinks[1]->set_level(spdlog::level::debug);         // regular file
-            sinks[2]->set_level(spdlog::level::debug);         // debug file
-        }
-        console_multisink.debug("Debug: you should see this on console and both files");
-
-        // Release and close all loggers
-        spdlog::drop_all();
-    }
-    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
-    catch (const spd::spdlog_ex &ex)
-    {
-        std::cout << "Log init failed: " << ex.what() << std::endl;
-        return 1;
-    }
-}

example/utils.h

@@ -1,34 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-#include <iomanip>
-#include <locale>
-#include <sstream>
-
-namespace utils {
-
-template<typename T>
-inline std::string format(const T &value)
-{
-    static std::locale loc("");
-    std::stringstream ss;
-    ss.imbue(loc);
-    ss << value;
-    return ss.str();
-}
-
-template<>
-inline std::string format(const double &value)
-{
-    static std::locale loc("");
-    std::stringstream ss;
-    ss.imbue(loc);
-    ss << std::fixed << std::setprecision(1) << value;
-    return ss.str();
-}
-
-} // namespace utils

format.sh

@@ -1,9 +0,0 @@
-#!/bin/bash
-echo -n "Running dos2unix     "
-find . -name "*\.h" -o -name "*\.cpp"|xargs -I {} sh -c "dos2unix '{}' 2>/dev/null; echo -n '.'"
-echo
-echo -n "Running clang-format "
-find . -name "*\.h" -o -name "*\.cpp"|xargs -I {} sh -c "clang-format -i {}; echo -n '.'"
-echo
-
-

include/spdlog/async.h

@@ -0,0 +1,93 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+//
+// Async logging using global thread pool
+// All loggers created here share same global thread pool.
+// Each log message is pushed to a queue along withe a shared pointer to the
+// logger.
+// If a logger deleted while having pending messages in the queue, it's actual
+// destruction will defer
+// until all its messages are processed by the thread pool.
+// This is because each message in the queue holds a shared_ptr to the
+// originating logger.
+
+#include "spdlog/async_logger.h"
+#include "spdlog/details/registry.h"
+#include "spdlog/details/thread_pool.h"
+
+#include <memory>
+#include <mutex>
+#include <functional>
+
+namespace spdlog {
+
+namespace details {
+static const size_t default_async_q_size = 8192;
+}
+
+// async logger factory - creates async loggers backed with thread pool.
+// if a global thread pool doesn't already exist, create it with default queue
+// size of 8192 items and single thread.
+template<async_overflow_policy OverflowPolicy = async_overflow_policy::block>
+struct async_factory_impl
+{
+    template<typename Sink, typename... SinkArgs>
+    static std::shared_ptr<async_logger> create(std::string logger_name, SinkArgs &&... args)
+    {
+        auto &registry_inst = details::registry::instance();
+
+        // create global thread pool if not already exists..
+
+        auto &mutex = registry_inst.tp_mutex();
+        std::lock_guard<std::recursive_mutex> tp_lock(mutex);
+        auto tp = registry_inst.get_tp();
+        if (tp == nullptr)
+        {
+            tp = std::make_shared<details::thread_pool>(details::default_async_q_size, 1);
+            registry_inst.set_tp(tp);
+        }
+
+        auto sink = std::make_shared<Sink>(std::forward<SinkArgs>(args)...);
+        auto new_logger = std::make_shared<async_logger>(std::move(logger_name), std::move(sink), std::move(tp), OverflowPolicy);
+        registry_inst.initialize_logger(new_logger);
+        return new_logger;
+    }
+};
+
+using async_factory = async_factory_impl<async_overflow_policy::block>;
+using async_factory_nonblock = async_factory_impl<async_overflow_policy::overrun_oldest>;
+
+template<typename Sink, typename... SinkArgs>
+inline std::shared_ptr<spdlog::logger> create_async(std::string logger_name, SinkArgs &&... sink_args)
+{
+    return async_factory::create<Sink>(std::move(logger_name), std::forward<SinkArgs>(sink_args)...);
+}
+
+template<typename Sink, typename... SinkArgs>
+inline std::shared_ptr<spdlog::logger> create_async_nb(std::string logger_name, SinkArgs &&... sink_args)
+{
+    return async_factory_nonblock::create<Sink>(std::move(logger_name), std::forward<SinkArgs>(sink_args)...);
+}
+
+// set global thread pool.
+inline void init_thread_pool(size_t q_size, size_t thread_count, std::function<void()> on_thread_start)
+{
+    auto tp = std::make_shared<details::thread_pool>(q_size, thread_count, on_thread_start);
+    details::registry::instance().set_tp(std::move(tp));
+}
+
+// set global thread pool.
+inline void init_thread_pool(size_t q_size, size_t thread_count)
+{
+    init_thread_pool(q_size, thread_count, [] {});
+}
+
+// get the global thread pool.
+inline std::shared_ptr<spdlog::details::thread_pool> thread_pool()
+{
+    return details::registry::instance().get_tp();
+}
+} // namespace spdlog

include/spdlog/async_logger-inl.h

@@ -0,0 +1,92 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/async_logger.h"
+#endif
+
+#include "spdlog/sinks/sink.h"
+#include "spdlog/details/thread_pool.h"
+
+#include <memory>
+#include <string>
+
+SPDLOG_INLINE spdlog::async_logger::async_logger(
+    std::string logger_name, sinks_init_list sinks_list, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
+    : async_logger(std::move(logger_name), sinks_list.begin(), sinks_list.end(), std::move(tp), overflow_policy)
+{}
+
+SPDLOG_INLINE spdlog::async_logger::async_logger(
+    std::string logger_name, sink_ptr single_sink, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
+    : async_logger(std::move(logger_name), {std::move(single_sink)}, std::move(tp), overflow_policy)
+{}
+
+// send the log message to the thread pool
+SPDLOG_INLINE void spdlog::async_logger::sink_it_(const details::log_msg &msg)
+{
+    if (auto pool_ptr = thread_pool_.lock())
+    {
+        pool_ptr->post_log(shared_from_this(), msg, overflow_policy_);
+    }
+    else
+    {
+        SPDLOG_THROW(spdlog_ex("async log: thread pool doesn't exist anymore"));
+    }
+}
+
+// send flush request to the thread pool
+SPDLOG_INLINE void spdlog::async_logger::flush_()
+{
+    if (auto pool_ptr = thread_pool_.lock())
+    {
+        pool_ptr->post_flush(shared_from_this(), overflow_policy_);
+    }
+    else
+    {
+        SPDLOG_THROW(spdlog_ex("async flush: thread pool doesn't exist anymore"));
+    }
+}
+
+//
+// backend functions - called from the thread pool to do the actual job
+//
+SPDLOG_INLINE void spdlog::async_logger::backend_sink_it_(const details::log_msg &msg)
+{
+    for (auto &sink : sinks_)
+    {
+        if (sink->should_log(msg.level))
+        {
+            SPDLOG_TRY
+            {
+                sink->log(msg);
+            }
+            SPDLOG_LOGGER_CATCH()
+        }
+    }
+
+    if (should_flush_(msg))
+    {
+        backend_flush_();
+    }
+}
+
+SPDLOG_INLINE void spdlog::async_logger::backend_flush_()
+{
+    for (auto &sink : sinks_)
+    {
+        SPDLOG_TRY
+        {
+            sink->flush();
+        }
+        SPDLOG_LOGGER_CATCH()
+    }
+}
+
+SPDLOG_INLINE std::shared_ptr<spdlog::logger> spdlog::async_logger::clone(std::string new_name)
+{
+    auto cloned = std::make_shared<spdlog::async_logger>(*this);
+    cloned->name_ = std::move(new_name);
+    return cloned;
+}

include/spdlog/async_logger.h

@@ -1,72 +1,68 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
-// Very fast asynchronous logger (millions of logs per second on an average desktop)
-// Uses pre allocated lockfree queue for maximum throughput even under large number of threads.
+// Fast asynchronous logger.
+// Uses pre allocated queue.
 // Creates a single back thread to pop messages from the queue and log them.
 //
 // Upon each log write the logger:
 //    1. Checks if its log level is enough to log the message
-//    2. Push a new copy of the message to a queue (or block the caller until space is available in the queue)
-//    3. will throw spdlog_ex upon log exceptions
-// Upon destruction, logs all remaining messages in the queue before destructing..
+//    2. Push a new copy of the message to a queue (or block the caller until
+//    space is available in the queue)
+// Upon destruction, logs all remaining messages in the queue before
+// destructing..
 
-#include "common.h"
-#include "logger.h"
-
-#include <chrono>
-#include <functional>
-#include <memory>
-#include <string>
+#include "spdlog/logger.h"
 
 namespace spdlog {
 
+// Async overflow policy - block by default.
+enum class async_overflow_policy
+{
+    block,         // Block until message can be enqueued
+    overrun_oldest // Discard oldest message in the queue if full when trying to
+                   // add new item.
+};
+
 namespace details {
-class async_log_helper;
+class thread_pool;
 }
 
-class async_logger SPDLOG_FINAL : public logger
+class async_logger final : public std::enable_shared_from_this<async_logger>, public logger
 {
+    friend class details::thread_pool;
+
 public:
-    template<class It>
-    async_logger(const std::string &logger_name, const It &begin, const It &end, size_t queue_size,
-        const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
-        const std::function<void()> &worker_warmup_cb = nullptr,
-        const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
-        const std::function<void()> &worker_teardown_cb = nullptr);
+    template<typename It>
+    async_logger(std::string logger_name, It begin, It end, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block)
+        : logger(std::move(logger_name), begin, end)
+        , thread_pool_(std::move(tp))
+        , overflow_policy_(overflow_policy)
+    {}
 
-    async_logger(const std::string &logger_name, sinks_init_list sinks, size_t queue_size,
-        const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
-        const std::function<void()> &worker_warmup_cb = nullptr,
-        const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
-        const std::function<void()> &worker_teardown_cb = nullptr);
+    async_logger(std::string logger_name, sinks_init_list sinks_list, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block);
 
-    async_logger(const std::string &logger_name, sink_ptr single_sink, size_t queue_size,
-        const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
-        const std::function<void()> &worker_warmup_cb = nullptr,
-        const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
-        const std::function<void()> &worker_teardown_cb = nullptr);
+    async_logger(std::string logger_name, sink_ptr single_sink, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block);
 
-    // Wait for the queue to be empty, and flush synchronously
-    // Warning: this can potentially last forever as we wait it to complete
-    void flush() override;
-
-    // Error handler
-    void set_error_handler(log_err_handler) override;
-    log_err_handler error_handler() override;
+    std::shared_ptr<logger> clone(std::string new_name) override;
 
 protected:
-    void _sink_it(details::log_msg &msg) override;
-    void _set_formatter(spdlog::formatter_ptr msg_formatter) override;
-    void _set_pattern(const std::string &pattern, pattern_time_type pattern_time) override;
+    void sink_it_(const details::log_msg &msg) override;
+    void flush_() override;
+    void backend_sink_it_(const details::log_msg &incoming_log_msg);
+    void backend_flush_();
 
 private:
-    std::unique_ptr<details::async_log_helper> _async_log_helper;
+    std::weak_ptr<details::thread_pool> thread_pool_;
+    async_overflow_policy overflow_policy_;
 };
 } // namespace spdlog
 
-#include "details/async_logger_impl.h"
+#ifdef SPDLOG_HEADER_ONLY
+#include "async_logger-inl.h"
+#endif

include/spdlog/common-inl.h

@@ -0,0 +1,57 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/common.h"
+#endif
+
+namespace spdlog {
+namespace level {
+static string_view_t level_string_views[] SPDLOG_LEVEL_NAMES;
+
+static const char *short_level_names[] SPDLOG_SHORT_LEVEL_NAMES;
+
+SPDLOG_INLINE string_view_t &to_string_view(spdlog::level::level_enum l) SPDLOG_NOEXCEPT
+{
+    return level_string_views[l];
+}
+
+SPDLOG_INLINE const char *to_short_c_str(spdlog::level::level_enum l) SPDLOG_NOEXCEPT
+{
+    return short_level_names[l];
+}
+
+SPDLOG_INLINE spdlog::level::level_enum from_str(const std::string &name) SPDLOG_NOEXCEPT
+{
+    int level = 0;
+    for (const auto &level_str : level_string_views)
+    {
+        if (level_str == name)
+        {
+            return static_cast<level::level_enum>(level);
+        }
+        level++;
+    }
+    return level::off;
+}
+} // namespace level
+
+SPDLOG_INLINE spdlog_ex::spdlog_ex(std::string msg)
+    : msg_(std::move(msg))
+{}
+
+SPDLOG_INLINE spdlog_ex::spdlog_ex(const std::string &msg, int last_errno)
+{
+    memory_buf_t outbuf;
+    fmt::format_system_error(outbuf, last_errno, msg);
+    msg_ = fmt::to_string(outbuf);
+}
+
+SPDLOG_INLINE const char *spdlog_ex::what() const SPDLOG_NOEXCEPT
+{
+    return msg_.c_str();
+}
+
+} // namespace spdlog

include/spdlog/common.h

@@ -1,46 +1,51 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
-#define SPDLOG_VERSION "0.17.0"
-
-#include "tweakme.h"
+#include "spdlog/tweakme.h"
+#include "spdlog/details/null_mutex.h"
 
 #include <atomic>
 #include <chrono>
-#include <exception>
-#include <functional>
 #include <initializer_list>
 #include <memory>
+#include <exception>
 #include <string>
-#include <unordered_map>
+#include <type_traits>
+#include <functional>
 
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-#include <codecvt>
-#include <locale>
+#ifdef _WIN32
+#ifndef NOMINMAX
+#define NOMINMAX // prevent windows redefining min/max
 #endif
 
-#include "details/null_mutex.h"
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#include <windows.h>
+#endif //_WIN32
+
+#ifdef SPDLOG_COMPILED_LIB
+#undef SPDLOG_HEADER_ONLY
+#define SPDLOG_INLINE
+#else
+#define SPDLOG_HEADER_ONLY
+#define SPDLOG_INLINE inline
+#endif
+
+#include "spdlog/fmt/fmt.h"
 
 // visual studio upto 2013 does not support noexcept nor constexpr
 #if defined(_MSC_VER) && (_MSC_VER < 1900)
-#define SPDLOG_NOEXCEPT throw()
+#define SPDLOG_NOEXCEPT _NOEXCEPT
 #define SPDLOG_CONSTEXPR
 #else
 #define SPDLOG_NOEXCEPT noexcept
 #define SPDLOG_CONSTEXPR constexpr
 #endif
 
-// final keyword support. On by default. See tweakme.h
-#if defined(SPDLOG_NO_FINAL)
-#define SPDLOG_FINAL
-#else
-#define SPDLOG_FINAL final
-#endif
-
 #if defined(__GNUC__) || defined(__clang__)
 #define SPDLOG_DEPRECATED __attribute__((deprecated))
 #elif defined(_MSC_VER)
@@ -49,7 +54,31 @@
 #define SPDLOG_DEPRECATED
 #endif
 
-#include "fmt/fmt.h"
+// disable thread local on msvc 2013
+#ifndef SPDLOG_NO_TLS
+#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__cplusplus_winrt)
+#define SPDLOG_NO_TLS 1
+#endif
+#endif
+
+#ifndef SPDLOG_FUNCTION
+#define SPDLOG_FUNCTION __FUNCTION__
+#endif
+
+#ifdef SPDLOG_NO_EXCEPTIONS
+#define SPDLOG_TRY
+#define SPDLOG_THROW(ex)                                                                                                                   \
+    do                                                                                                                                     \
+    {                                                                                                                                      \
+        printf("spdlog fatal error: %s\n", ex.what());                                                                                     \
+        std::abort();                                                                                                                      \
+    } while (0)
+#define SPDLOG_CATCH_ALL()
+#else
+#define SPDLOG_TRY try
+#define SPDLOG_THROW(ex) throw(ex)
+#define SPDLOG_CATCH_ALL() catch (...)
+#endif
 
 namespace spdlog {
 
@@ -59,29 +88,66 @@ namespace sinks {
 class sink;
 }
 
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+using filename_t = std::wstring;
+#define SPDLOG_FILENAME_T(s) L##s
+#else
+using filename_t = std::string;
+#define SPDLOG_FILENAME_T(s) s
+#endif
+
 using log_clock = std::chrono::system_clock;
 using sink_ptr = std::shared_ptr<sinks::sink>;
 using sinks_init_list = std::initializer_list<sink_ptr>;
-using formatter_ptr = std::shared_ptr<spdlog::formatter>;
+using err_handler = std::function<void(const std::string &err_msg)>;
+using string_view_t = fmt::basic_string_view<char>;
+using memory_buf_t = fmt::basic_memory_buffer<char, 250>;
+
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+#ifndef _WIN32
+#error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
+#else
+using wstring_view_t = fmt::basic_string_view<wchar_t>;
+
+template<typename T>
+struct is_convertible_to_wstring_view : std::is_convertible<T, wstring_view_t>
+{};
+#endif // _WIN32
+#else
+template<typename>
+struct is_convertible_to_wstring_view : std::false_type
+{};
+#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
+
 #if defined(SPDLOG_NO_ATOMIC_LEVELS)
 using level_t = details::null_atomic_int;
 #else
 using level_t = std::atomic<int>;
 #endif
 
-using log_err_handler = std::function<void(const std::string &err_msg)>;
+#define SPDLOG_LEVEL_TRACE 0
+#define SPDLOG_LEVEL_DEBUG 1
+#define SPDLOG_LEVEL_INFO 2
+#define SPDLOG_LEVEL_WARN 3
+#define SPDLOG_LEVEL_ERROR 4
+#define SPDLOG_LEVEL_CRITICAL 5
+#define SPDLOG_LEVEL_OFF 6
+
+#if !defined(SPDLOG_ACTIVE_LEVEL)
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_INFO
+#endif
 
 // Log level enum
 namespace level {
 enum level_enum
 {
-    trace = 0,
-    debug = 1,
-    info = 2,
-    warn = 3,
-    err = 4,
-    critical = 5,
-    off = 6
+    trace = SPDLOG_LEVEL_TRACE,
+    debug = SPDLOG_LEVEL_DEBUG,
+    info = SPDLOG_LEVEL_INFO,
+    warn = SPDLOG_LEVEL_WARN,
+    err = SPDLOG_LEVEL_ERROR,
+    critical = SPDLOG_LEVEL_CRITICAL,
+    off = SPDLOG_LEVEL_OFF,
 };
 
 #if !defined(SPDLOG_LEVEL_NAMES)
@@ -90,44 +156,30 @@ enum level_enum
         "trace", "debug", "info", "warning", "error", "critical", "off"                                                                    \
     }
 #endif
-static const char *level_names[] SPDLOG_LEVEL_NAMES;
 
-static const char *short_level_names[]{"T", "D", "I", "W", "E", "C", "O"};
+#if !defined(SPDLOG_SHORT_LEVEL_NAMES)
 
-inline const char *to_str(spdlog::level::level_enum l)
-{
-    return level_names[l];
-}
+#define SPDLOG_SHORT_LEVEL_NAMES                                                                                                           \
+    {                                                                                                                                      \
+        "T", "D", "I", "W", "E", "C", "O"                                                                                                  \
+    }
+#endif
 
-inline const char *to_short_str(spdlog::level::level_enum l)
-{
-    return short_level_names[l];
-}
-inline spdlog::level::level_enum from_str(const std::string &name)
-{
-    static std::unordered_map<std::string, level_enum> name_to_level = // map string->level
-        {{level_names[0], level::trace},                               // trace
-            {level_names[1], level::debug},                            // debug
-            {level_names[2], level::info},                             // info
-            {level_names[3], level::warn},                             // warn
-            {level_names[4], level::err},                              // err
-            {level_names[5], level::critical},                         // critical
-            {level_names[6], level::off}};                             // off
-
-    auto lvl_it = name_to_level.find(name);
-    return lvl_it != name_to_level.end() ? lvl_it->second : level::off;
-}
+string_view_t &to_string_view(spdlog::level::level_enum l) SPDLOG_NOEXCEPT;
+const char *to_short_c_str(spdlog::level::level_enum l) SPDLOG_NOEXCEPT;
+spdlog::level::level_enum from_str(const std::string &name) SPDLOG_NOEXCEPT;
 
 using level_hasher = std::hash<int>;
 } // namespace level
 
 //
-// Async overflow policy - block by default.
+// Color mode used by sinks with color support.
 //
-enum class async_overflow_policy
+enum class color_mode
 {
-    block_retry,    // Block / yield / sleep until message can be enqueued
-    discard_log_msg // Discard the message it enqueue fails
+    always,
+    automatic,
+    never
 };
 
 //
@@ -143,40 +195,52 @@ enum class pattern_time_type
 //
 // Log exception
 //
-namespace details {
-namespace os {
-std::string errno_str(int err_num);
-}
-} // namespace details
 class spdlog_ex : public std::exception
 {
 public:
-    explicit spdlog_ex(std::string msg)
-        : _msg(std::move(msg))
-    {
-    }
-
-    spdlog_ex(const std::string &msg, int last_errno)
-    {
-        _msg = msg + ": " + details::os::errno_str(last_errno);
-    }
-
-    const char *what() const SPDLOG_NOEXCEPT override
-    {
-        return _msg.c_str();
-    }
+    explicit spdlog_ex(std::string msg);
+    spdlog_ex(const std::string &msg, int last_errno);
+    const char *what() const SPDLOG_NOEXCEPT override;
 
 private:
-    std::string _msg;
+    std::string msg_;
 };
 
-//
-// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
-//
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-using filename_t = std::wstring;
+struct source_loc
+{
+    SPDLOG_CONSTEXPR source_loc() = default;
+    SPDLOG_CONSTEXPR source_loc(const char *filename_in, int line_in, const char *funcname_in)
+        : filename{filename_in}
+        , line{line_in}
+        , funcname{funcname_in}
+    {}
+
+    SPDLOG_CONSTEXPR bool empty() const SPDLOG_NOEXCEPT
+    {
+        return line == 0;
+    }
+    const char *filename{nullptr};
+    int line{0};
+    const char *funcname{nullptr};
+};
+
+namespace details {
+// make_unique support for pre c++14
+
+#if __cplusplus >= 201402L // C++14 and beyond
+using std::make_unique;
 #else
-using filename_t = std::string;
+template<typename T, typename... Args>
+std::unique_ptr<T> make_unique(Args &&... args)
+{
+    static_assert(!std::is_array<T>::value, "arrays not supported");
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
 #endif
+} // namespace details
 
 } // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "common-inl.h"
+#endif

include/spdlog/contrib/README.md

@@ -1 +0,0 @@
-Please put here your contribs. Popular contribs will be moved to main tree after stablization

include/spdlog/contrib/sinks/.gitignore

@@ -1 +0,0 @@
-

include/spdlog/contrib/sinks/step_file_sink.h

@@ -1,163 +0,0 @@
-#pragma once
-
-#include "../../details/file_helper.h"
-#include "../../details/null_mutex.h"
-#include "../../fmt/fmt.h"
-#include "../../sinks/base_sink.h"
-
-#include <algorithm>
-#include <cerrno>
-#include <chrono>
-#include <cstdio>
-#include <ctime>
-#include <mutex>
-#include <string>
-
-// Example for spdlog.h
-//
-// Create a file logger which creates new files with a specified time step and fixed file size:
-//
-// std::shared_ptr<logger> step_logger_mt(const std::string &logger_name, const filename_t &filename, unsigned seconds = 60, const
-// filename_t &tmp_ext = ".tmp", unsigned max_file_size = std::numeric_limits<unsigned>::max()); std::shared_ptr<logger>
-// step_logger_st(const std::string &logger_name, const filename_t &filename, unsigned seconds = 60, const filename_t &tmp_ext = ".tmp",
-// unsigned max_file_size = std::numeric_limits<unsigned>::max());
-
-// Example for spdlog_impl.h
-// Create a file logger that creates new files with a specified increment
-// inline std::shared_ptr<spdlog::logger> spdlog::step_logger_mt(
-//     const std::string &logger_name, const filename_t &filename_fmt, unsigned seconds, const filename_t &tmp_ext, unsigned max_file_size)
-// {
-//     return create<spdlog::sinks::step_file_sink_mt>(logger_name, filename_fmt, seconds, tmp_ext, max_file_size);
-// }
-
-// inline std::shared_ptr<spdlog::logger> spdlog::step_logger_st(
-//     const std::string &logger_name, const filename_t &filename_fmt, unsigned seconds, const filename_t &tmp_ext, unsigned max_file_size)
-// {
-//     return create<spdlog::sinks::step_file_sink_st>(logger_name, filename_fmt, seconds, tmp_ext, max_file_size);
-// }
-
-namespace spdlog {
-namespace sinks {
-
-/*
- * Default generator of step log file names.
- */
-struct default_step_file_name_calculator
-{
-    // Create filename for the form filename_YYYY-MM-DD_hh-mm-ss.ext
-    static std::tuple<filename_t, filename_t> calc_filename(const filename_t &filename, const filename_t &tmp_ext)
-    {
-        std::tm tm = spdlog::details::os::localtime();
-        filename_t basename, ext;
-        std::tie(basename, ext) = details::file_helper::split_by_extenstion(filename);
-        std::conditional<std::is_same<filename_t::value_type, char>::value, fmt::MemoryWriter, fmt::WMemoryWriter>::type w;
-        w.write(SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}_{:02d}-{:02d}-{:02d}{}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
-            tm.tm_hour, tm.tm_min, tm.tm_sec, tmp_ext);
-        return std::make_tuple(w.str(), ext);
-    }
-};
-
-/*
- * Rotating file sink based on size and a specified time step
- */
-template<class Mutex, class FileNameCalc = default_step_file_name_calculator>
-class step_file_sink SPDLOG_FINAL : public base_sink<Mutex>
-{
-public:
-    step_file_sink(filename_t base_filename, unsigned step_seconds, filename_t tmp_ext, unsigned max_size)
-        : _base_filename(std::move(base_filename))
-        , _tmp_ext(std::move(tmp_ext))
-        , _step_seconds(step_seconds)
-        , _max_size(max_size)
-    {
-        if (step_seconds == 0)
-        {
-            throw spdlog_ex("step_file_sink: Invalid time step in ctor");
-        }
-        if (max_size == 0)
-        {
-            throw spdlog_ex("step_file_sink: Invalid max log size in ctor");
-        }
-
-        _tp = _next_tp();
-        std::tie(_current_filename, _ext) = FileNameCalc::calc_filename(_base_filename, _tmp_ext);
-
-        if (_tmp_ext == _ext)
-        {
-            throw spdlog_ex("step_file_sink: The temporary extension matches the specified in ctor");
-        }
-
-        _file_helper.open(_current_filename);
-        _current_size = _file_helper.size(); // expensive. called only once
-    }
-
-    ~step_file_sink()
-    {
-        try
-        {
-            close_current_file();
-        }
-        catch (...)
-        {
-        }
-    }
-
-protected:
-    void _sink_it(const details::log_msg &msg) override
-    {
-        _current_size += msg.formatted.size();
-        if (std::chrono::system_clock::now() >= _tp || _current_size > _max_size)
-        {
-            close_current_file();
-
-            std::tie(_current_filename, std::ignore) = FileNameCalc::calc_filename(_base_filename, _tmp_ext);
-            _file_helper.open(_current_filename);
-            _tp = _next_tp();
-            _current_size = msg.formatted.size();
-        }
-        _file_helper.write(msg);
-    }
-
-    void _flush() override
-    {
-        _file_helper.flush();
-    }
-
-private:
-    std::chrono::system_clock::time_point _next_tp()
-    {
-        return std::chrono::system_clock::now() + _step_seconds;
-    }
-
-    void close_current_file()
-    {
-        using details::os::filename_to_str;
-
-        filename_t src = _current_filename, target;
-        std::tie(target, std::ignore) = details::file_helper::split_by_extenstion(src);
-        target += _ext;
-
-        if (details::file_helper::file_exists(src) && details::os::rename(src, target) != 0)
-        {
-            throw spdlog_ex("step_file_sink: failed renaming " + filename_to_str(src) + " to " + filename_to_str(target), errno);
-        }
-    }
-
-    const filename_t _base_filename;
-    const filename_t _tmp_ext;
-    const std::chrono::seconds _step_seconds;
-    const unsigned _max_size;
-
-    std::chrono::system_clock::time_point _tp;
-    filename_t _current_filename;
-    filename_t _ext;
-    unsigned _current_size;
-
-    details::file_helper _file_helper;
-};
-
-using step_file_sink_mt = step_file_sink<std::mutex>;
-using step_file_sink_st = step_file_sink<details::null_mutex>;
-
-} // namespace sinks
-} // namespace spdlog

include/spdlog/details/async_log_helper.h

@@ -1,342 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-// async log helper :
-// Process logs asynchronously using a back thread.
-//
-// If the internal queue of log messages reaches its max size,
-// then the client call will block until there is more room.
-//
-
-#pragma once
-
-#include "../common.h"
-#include "../details/log_msg.h"
-#include "../details/mpmc_blocking_q.h"
-#include "../details/os.h"
-#include "../formatter.h"
-#include "../sinks/sink.h"
-
-#include <chrono>
-#include <condition_variable>
-#include <exception>
-#include <functional>
-#include <iostream>
-#include <memory>
-#include <string>
-#include <thread>
-#include <utility>
-#include <vector>
-
-namespace spdlog {
-namespace details {
-
-class async_log_helper
-{
-    // Async msg to move to/from the queue
-    // Movable only. should never be copied
-    enum class async_msg_type
-    {
-        log,
-        flush,
-        terminate
-    };
-
-    struct async_msg
-    {        
-        level::level_enum level;
-        log_clock::time_point time;
-        size_t thread_id;
-        std::string txt;
-        async_msg_type msg_type;
-        size_t msg_id;
-
-        async_msg() = default;
-        ~async_msg() = default;
-
-        explicit async_msg(async_msg_type m_type)
-            : level(level::info)
-            , thread_id(0)
-            , msg_type(m_type)
-            , msg_id(0)
-        {
-        }
-
-        async_msg(async_msg &&other) = default;
-        async_msg &operator=(async_msg &&other) = default;
-
-        // never copy or assign. should only be moved..
-        async_msg(const async_msg &) = delete;
-        async_msg &operator=(const async_msg &other) = delete;
-
-        // construct from log_msg
-        explicit async_msg(const details::log_msg &m)
-            : level(m.level)
-            , time(m.time)
-            , thread_id(m.thread_id)
-            , txt(m.raw.data(), m.raw.size())
-            , msg_type(async_msg_type::log)
-            , msg_id(m.msg_id)
-        {
-        }
-
-        // copy into log_msg
-        void fill_log_msg(log_msg &msg, std::string* logger_name)
-        {
-            msg.logger_name = logger_name;
-            msg.level = level;
-            msg.time = time;
-            msg.thread_id = thread_id;
-            msg.raw.clear();
-            msg.raw << txt;
-            msg.msg_id = msg_id;
-        }
-    };
-
-public:
-    using item_type = async_msg;
-    using q_type = details::mpmc_bounded_queue<item_type>;
-
-    using clock = std::chrono::steady_clock;
-
-    async_log_helper(std::string logger_name,
-                     formatter_ptr formatter,
-                     std::vector<sink_ptr> sinks,
-                     size_t queue_size,
-                     const log_err_handler err_handler,
-                     const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
-                     std::function<void()> worker_warmup_cb = nullptr,
-                     const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
-                     std::function<void()> worker_teardown_cb = nullptr);
-
-    void log(const details::log_msg &msg);
-
-    // stop logging and join the back thread
-    ~async_log_helper();
-
-    async_log_helper(const async_log_helper &) = delete;
-    async_log_helper &operator=(const async_log_helper &) = delete;
-
-    void set_formatter(formatter_ptr msg_formatter);
-
-    void flush();
-
-    void set_error_handler(spdlog::log_err_handler err_handler);
-
-private:
-	std::string _logger_name;
-    formatter_ptr _formatter;
-    std::vector<std::shared_ptr<sinks::sink>> _sinks;
-
-    // queue of messages to log
-    q_type _q;
-
-    log_err_handler _err_handler;
-
-    std::chrono::time_point<log_clock> _last_flush;
-
-    // overflow policy
-    const async_overflow_policy _overflow_policy;
-
-    // worker thread warmup callback - one can set thread priority, affinity, etc
-    const std::function<void()> _worker_warmup_cb;
-
-    // auto periodic sink flush parameter
-    const std::chrono::milliseconds _flush_interval_ms;
-
-    // worker thread teardown callback
-    const std::function<void()> _worker_teardown_cb;
-
-    std::mutex null_mutex_;
-    // null_mutex null_mutex_;
-    std::condition_variable_any not_empty_cv_;
-    std::condition_variable_any not_full_cv_;
-
-    // worker thread
-    std::thread _worker_thread;
-
-    void enqueue_msg(async_msg &&new_msg, async_overflow_policy policy);
-
-    // worker thread main loop
-    void worker_loop();
-
-    // dequeue next message from the queue and process it.
-    // return false if termination of the queue is required
-    bool process_next_msg();
-
-    void handle_flush_interval();
-
-    void flush_sinks();
-};
-} // namespace details
-} // namespace spdlog
-
-///////////////////////////////////////////////////////////////////////////////
-// async_sink class implementation
-///////////////////////////////////////////////////////////////////////////////
-inline spdlog::details::async_log_helper::async_log_helper(std::string logger_name, 
-                                                           formatter_ptr formatter, 
-                                                           std::vector<sink_ptr> sinks,
-                                                           size_t queue_size,
-                                                           log_err_handler err_handler, 
-                                                           const async_overflow_policy overflow_policy,
-                                                           std::function<void()> worker_warmup_cb,
-                                                           const std::chrono::milliseconds &flush_interval_ms,
-                                                           std::function<void()> worker_teardown_cb)
-    : _logger_name(std::move(logger_name)) 
-	, _formatter(std::move(formatter))
-    , _sinks(std::move(sinks))
-    , _q(queue_size)
-    , _err_handler(std::move(err_handler))
-    , _last_flush(os::now())
-    , _overflow_policy(overflow_policy)
-    , _worker_warmup_cb(std::move(worker_warmup_cb))
-    , _flush_interval_ms(flush_interval_ms)
-    , _worker_teardown_cb(std::move(worker_teardown_cb))
-{
-    _worker_thread = std::thread(&async_log_helper::worker_loop, this);
-}
-
-// send to the worker thread terminate message, and join it.
-inline spdlog::details::async_log_helper::~async_log_helper()
-{
-    try
-    {
-        enqueue_msg(async_msg(async_msg_type::terminate), async_overflow_policy::block_retry);
-        _worker_thread.join();
-    }
-    catch (...) // don't crash in destructor
-    {
-    }
-}
-
-// try to push and block until succeeded (if the policy is not to discard when the queue is full)
-inline void spdlog::details::async_log_helper::log(const details::log_msg &msg)
-{
-    enqueue_msg(async_msg(msg), _overflow_policy);
-}
-
-inline void spdlog::details::async_log_helper::enqueue_msg(details::async_log_helper::async_msg &&new_msg, async_overflow_policy policy)
-{
-
-    // block until succeeded pushing to the queue
-    if (policy == async_overflow_policy::block_retry)
-    {
-        _q.enqueue(std::move(new_msg));
-    }
-    else
-    {
-        _q.enqueue_nowait(std::move(new_msg));
-    }
-}
-
-// optionally wait for the queue be empty and request flush from the sinks
-inline void spdlog::details::async_log_helper::flush()
-{
-    enqueue_msg(async_msg(async_msg_type::flush), _overflow_policy);
-}
-
-inline void spdlog::details::async_log_helper::worker_loop()
-{
-    if (_worker_warmup_cb)
-    {
-        _worker_warmup_cb();
-    }
-    auto active = true;
-    while (active)
-    {
-        try
-        {
-            active = process_next_msg();
-        }
-        catch (const std::exception &ex)
-        {
-            _err_handler(ex.what());
-        }
-        catch (...)
-        {
-            _err_handler("Unknown exeption in async logger worker loop.");
-        }
-    }
-    if (_worker_teardown_cb)
-    {
-        _worker_teardown_cb();
-    }
-}
-
-// process next message in the queue
-// return true if this thread should still be active (while no terminate msg was received)
-inline bool spdlog::details::async_log_helper::process_next_msg()
-{
-    async_msg incoming_async_msg;
-    bool dequeued = _q.dequeue_for(incoming_async_msg, std::chrono::seconds(2));
-    if (!dequeued)
-    {
-        handle_flush_interval();
-        return true;
-    }
-
-    switch (incoming_async_msg.msg_type)
-    {
-    case async_msg_type::flush:
-        flush_sinks();
-        return true;
-
-    case async_msg_type::terminate:
-        flush_sinks();
-        return false;
-
-    default:
-        log_msg incoming_log_msg;
-        incoming_async_msg.fill_log_msg(incoming_log_msg, &_logger_name);
-        _formatter->format(incoming_log_msg);
-        for (auto &s : _sinks)
-        {
-            if (s->should_log(incoming_log_msg.level))
-            {
-                s->log(incoming_log_msg);
-            }
-        }
-        handle_flush_interval();
-        return true;
-    }
-    assert(false);
-    return true; // should not be reached
-}
-
-inline void spdlog::details::async_log_helper::set_formatter(formatter_ptr msg_formatter)
-{
-    _formatter = std::move(msg_formatter);
-}
-
-inline void spdlog::details::async_log_helper::set_error_handler(spdlog::log_err_handler err_handler)
-{
-    _err_handler = std::move(err_handler);
-}
-
-// flush all sinks if _flush_interval_ms has expired.
-inline void spdlog::details::async_log_helper::handle_flush_interval()
-{
-    if (_flush_interval_ms == std::chrono::milliseconds::zero())
-    {
-        return;
-    }
-    auto delta = details::os::now() - _last_flush;
-    ;
-    if (delta >= _flush_interval_ms)
-    {
-        flush_sinks();
-    }
-}
-
-// flush all sinks if _flush_interval_ms has expired. only called if queue is empty
-inline void spdlog::details::async_log_helper::flush_sinks()
-{
-    for (auto &s : _sinks)
-    {
-        s->flush();
-    }
-    _last_flush = os::now();
-}

include/spdlog/details/async_logger_impl.h

@@ -1,95 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-// Async Logger implementation
-// Use an async_sink (queue per logger) to perform the logging in a worker thread
-
-#include "../async_logger.h"
-#include "../details/async_log_helper.h"
-
-#include <chrono>
-#include <functional>
-#include <memory>
-#include <string>
-
-template<class It>
-inline spdlog::async_logger::async_logger(const std::string &logger_name, const It &begin, const It &end, size_t queue_size,
-    const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
-    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
-    : logger(logger_name, begin, end)
-    , _async_log_helper(new details::async_log_helper(
-          logger_name, _formatter, _sinks, queue_size, _err_handler, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb))
-{
-}
-
-inline spdlog::async_logger::async_logger(const std::string &logger_name, sinks_init_list sinks_list, size_t queue_size,
-    const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
-    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
-    : async_logger(logger_name, sinks_list.begin(), sinks_list.end(), queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms,
-          worker_teardown_cb)
-{
-}
-
-inline spdlog::async_logger::async_logger(const std::string &logger_name, sink_ptr single_sink, size_t queue_size,
-    const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
-    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
-    : async_logger(
-          logger_name, {std::move(single_sink)}, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb)
-{
-}
-
-inline void spdlog::async_logger::flush()
-{
-    _async_log_helper->flush();
-}
-
-// Error handler
-inline void spdlog::async_logger::set_error_handler(spdlog::log_err_handler err_handler)
-{
-    _err_handler = err_handler;
-    _async_log_helper->set_error_handler(err_handler);
-}
-inline spdlog::log_err_handler spdlog::async_logger::error_handler()
-{
-    return _err_handler;
-}
-
-inline void spdlog::async_logger::_set_formatter(spdlog::formatter_ptr msg_formatter)
-{
-    _formatter = msg_formatter;
-    _async_log_helper->set_formatter(_formatter);
-}
-
-inline void spdlog::async_logger::_set_pattern(const std::string &pattern, pattern_time_type pattern_time)
-{
-    _formatter = std::make_shared<pattern_formatter>(pattern, pattern_time);
-    _async_log_helper->set_formatter(_formatter);
-}
-
-inline void spdlog::async_logger::_sink_it(details::log_msg &msg)
-{
-    try
-    {
-#if defined(SPDLOG_ENABLE_MESSAGE_COUNTER)
-        _incr_msg_counter(msg);
-#endif
-        _async_log_helper->log(msg);
-        if (_should_flush_on(msg))
-        {
-            _async_log_helper->flush(); // do async flush
-        }
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception in logger " + _name);
-        throw;
-    }
-}

include/spdlog/details/backtracer-inl.h

@@ -0,0 +1,74 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/details/backtracer.h"
+#endif
+namespace spdlog {
+namespace details {
+SPDLOG_INLINE backtracer::backtracer(const backtracer &other)
+{
+    std::lock_guard<std::mutex> lock(other.mutex_);
+    enabled_ = other.enabled();
+    messages_ = other.messages_;
+}
+
+SPDLOG_INLINE backtracer::backtracer(backtracer &&other) SPDLOG_NOEXCEPT
+{
+    std::lock_guard<std::mutex> lock(other.mutex_);
+    enabled_ = other.enabled();
+    messages_ = std::move(other.messages_);
+}
+
+SPDLOG_INLINE backtracer &backtracer::operator=(backtracer other)
+{
+    std::lock_guard<std::mutex> lock(mutex_);
+    enabled_ = other.enabled();
+    messages_ = other.messages_;
+    return *this;
+}
+
+SPDLOG_INLINE void backtracer::enable(size_t size)
+{
+    std::lock_guard<std::mutex> lock{mutex_};
+    enabled_.store(true, std::memory_order_relaxed);
+    messages_ = circular_q<log_msg_buffer>{size};
+}
+
+SPDLOG_INLINE void backtracer::disable()
+{
+    std::lock_guard<std::mutex> lock{mutex_};
+    enabled_.store(false, std::memory_order_relaxed);
+}
+
+SPDLOG_INLINE bool backtracer::enabled() const
+{
+    return enabled_.load(std::memory_order_relaxed);
+}
+
+SPDLOG_INLINE backtracer::operator bool() const
+{
+    return enabled();
+}
+
+SPDLOG_INLINE void backtracer::push_back(const log_msg &msg)
+{
+    std::lock_guard<std::mutex> lock{mutex_};
+    messages_.push_back(log_msg_buffer{msg});
+}
+
+// pop all items in the q and apply the given fun on each of them.
+SPDLOG_INLINE void backtracer::foreach_pop(std::function<void(const details::log_msg &)> fun)
+{
+    std::lock_guard<std::mutex> lock{mutex_};
+    while (!messages_.empty())
+    {
+        auto &front_msg = messages_.front();
+        fun(front_msg);
+        messages_.pop_front();
+    }
+}
+} // namespace details
+} // namespace spdlog

include/spdlog/details/backtracer.h

@@ -0,0 +1,46 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include "spdlog/details/log_msg_buffer.h"
+#include "spdlog/details/circular_q.h"
+
+#include <atomic>
+#include <mutex>
+#include <functional>
+
+// Store log messages in circular buffer.
+// Useful for storing debug data in case of error/warning happens.
+
+namespace spdlog {
+namespace details {
+class backtracer
+{
+    mutable std::mutex mutex_;
+    std::atomic<bool> enabled_{false};
+    circular_q<log_msg_buffer> messages_;
+
+public:
+    backtracer() = default;
+    backtracer(const backtracer &other);
+
+    backtracer(backtracer &&other) SPDLOG_NOEXCEPT;
+    backtracer &operator=(backtracer other);
+
+    void enable(size_t size);
+    void disable();
+    bool enabled() const;
+    explicit operator bool() const;
+    void push_back(const log_msg &msg);
+
+    // pop all items in the q and apply the given fun on each of them.
+    void foreach_pop(std::function<void(const details::log_msg &)> fun);
+};
+
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "backtracer-inl.h"
+#endif

include/spdlog/details/circular_q.h

@@ -0,0 +1,119 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+// cirucal q view of std::vector.
+#pragma once
+
+#include <vector>
+
+namespace spdlog {
+namespace details {
+template<typename T>
+class circular_q
+{
+    size_t max_items_ = 0;
+    typename std::vector<T>::size_type head_ = 0;
+    typename std::vector<T>::size_type tail_ = 0;
+    size_t overrun_counter_ = 0;
+    std::vector<T> v_;
+
+public:
+    using value_type = T;
+
+    // empty ctor - create a disabled queue with no elements allocated at all
+    circular_q() = default;
+
+    explicit circular_q(size_t max_items)
+        : max_items_(max_items + 1) // one item is reserved as marker for full q
+        , v_(max_items_)
+    {}
+
+    circular_q(const circular_q &) = default;
+    circular_q &operator=(const circular_q &) = default;
+
+    // move cannot be default,
+    // since we need to reset head_, tail_, etc to zero in the moved object
+    circular_q(circular_q &&other) SPDLOG_NOEXCEPT
+    {
+        copy_moveable(std::move(other));
+    }
+
+    circular_q &operator=(circular_q &&other) SPDLOG_NOEXCEPT
+    {
+        copy_moveable(std::move(other));
+        return *this;
+    }
+
+    // push back, overrun (oldest) item if no room left
+    void push_back(T &&item)
+    {
+        if (max_items_ > 0)
+        {
+            v_[tail_] = std::move(item);
+            tail_ = (tail_ + 1) % max_items_;
+
+            if (tail_ == head_) // overrun last item if full
+            {
+                head_ = (head_ + 1) % max_items_;
+                ++overrun_counter_;
+            }
+        }
+    }
+
+    // Return reference to the front item.
+    // If there are no elements in the container, the behavior is undefined.
+    const T &front() const
+    {
+        return v_[head_];
+    }
+
+    T &front()
+    {
+        return v_[head_];
+    }
+
+    // Pop item from front.
+    // If there are no elements in the container, the behavior is undefined.
+    void pop_front()
+    {
+        head_ = (head_ + 1) % max_items_;
+    }
+
+    bool empty() const
+    {
+        return tail_ == head_;
+    }
+
+    bool full() const
+    {
+        // head is ahead of the tail by 1
+        if (max_items_ > 0)
+        {
+            return ((tail_ + 1) % max_items_) == head_;
+        }
+        return false;
+    }
+
+    size_t overrun_counter() const
+    {
+        return overrun_counter_;
+    }
+
+private:
+    // copy from other&& and reset it to disabled state
+    void copy_moveable(circular_q &&other) SPDLOG_NOEXCEPT
+    {
+        max_items_ = other.max_items_;
+        head_ = other.head_;
+        tail_ = other.tail_;
+        overrun_counter_ = other.overrun_counter_;
+        v_ = std::move(other.v_);
+
+        // put &&other in disabled, but valid state
+        other.max_items_ = 0;
+        other.head_ = other.tail_ = 0;
+        other.overrun_counter_ = 0;
+    }
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/details/console_globals.h

@@ -0,0 +1,32 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include "spdlog/details/null_mutex.h"
+#include <mutex>
+
+namespace spdlog {
+namespace details {
+
+struct console_mutex
+{
+    using mutex_t = std::mutex;
+    static mutex_t &mutex()
+    {
+        static mutex_t s_mutex;
+        return s_mutex;
+    }
+};
+
+struct console_nullmutex
+{
+    using mutex_t = null_mutex;
+    static mutex_t &mutex()
+    {
+        static mutex_t s_mutex;
+        return s_mutex;
+    }
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/details/file_helper-inl.h

@@ -0,0 +1,133 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/details/file_helper.h"
+#endif
+
+#include "spdlog/details/os.h"
+#include "spdlog/common.h"
+
+#include <cerrno>
+#include <chrono>
+#include <cstdio>
+#include <string>
+#include <thread>
+#include <tuple>
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE file_helper::~file_helper()
+{
+    close();
+}
+
+SPDLOG_INLINE void file_helper::open(const filename_t &fname, bool truncate)
+{
+    close();
+    auto *mode = truncate ? SPDLOG_FILENAME_T("wb") : SPDLOG_FILENAME_T("ab");
+    _filename = fname;
+    for (int tries = 0; tries < open_tries; ++tries)
+    {
+        if (!os::fopen_s(&fd_, fname, mode))
+        {
+            return;
+        }
+
+        details::os::sleep_for_millis(open_interval);
+    }
+
+    SPDLOG_THROW(spdlog_ex("Failed opening file " + os::filename_to_str(_filename) + " for writing", errno));
+}
+
+SPDLOG_INLINE void file_helper::reopen(bool truncate)
+{
+    if (_filename.empty())
+    {
+        SPDLOG_THROW(spdlog_ex("Failed re opening file - was not opened before"));
+    }
+    open(_filename, truncate);
+}
+
+SPDLOG_INLINE void file_helper::flush()
+{
+    std::fflush(fd_);
+}
+
+SPDLOG_INLINE void file_helper::close()
+{
+    if (fd_ != nullptr)
+    {
+        std::fclose(fd_);
+        fd_ = nullptr;
+    }
+}
+
+SPDLOG_INLINE void file_helper::write(const memory_buf_t &buf)
+{
+    size_t msg_size = buf.size();
+    auto data = buf.data();
+    if (std::fwrite(data, 1, msg_size, fd_) != msg_size)
+    {
+        SPDLOG_THROW(spdlog_ex("Failed writing to file " + os::filename_to_str(_filename), errno));
+    }
+}
+
+SPDLOG_INLINE size_t file_helper::size() const
+{
+    if (fd_ == nullptr)
+    {
+        SPDLOG_THROW(spdlog_ex("Cannot use size() on closed file " + os::filename_to_str(_filename)));
+    }
+    return os::filesize(fd_);
+}
+
+SPDLOG_INLINE const filename_t &file_helper::filename() const
+{
+    return _filename;
+}
+
+SPDLOG_INLINE bool file_helper::file_exists(const filename_t &fname)
+{
+    return os::file_exists(fname);
+}
+
+//
+// return file path and its extension:
+//
+// "mylog.txt" => ("mylog", ".txt")
+// "mylog" => ("mylog", "")
+// "mylog." => ("mylog.", "")
+// "/dir1/dir2/mylog.txt" => ("/dir1/dir2/mylog", ".txt")
+//
+// the starting dot in filenames is ignored (hidden files):
+//
+// ".mylog" => (".mylog". "")
+// "my_folder/.mylog" => ("my_folder/.mylog", "")
+// "my_folder/.mylog.txt" => ("my_folder/.mylog", ".txt")
+SPDLOG_INLINE std::tuple<filename_t, filename_t> file_helper::split_by_extension(const filename_t &fname)
+{
+    auto ext_index = fname.rfind('.');
+
+    // no valid extension found - return whole path and empty string as
+    // extension
+    if (ext_index == filename_t::npos || ext_index == 0 || ext_index == fname.size() - 1)
+    {
+        return std::make_tuple(fname, filename_t());
+    }
+
+    // treat casese like "/etc/rc.d/somelogfile or "/abc/.hiddenfile"
+    auto folder_index = fname.rfind(details::os::folder_sep);
+    if (folder_index != filename_t::npos && folder_index >= ext_index - 1)
+    {
+        return std::make_tuple(fname, filename_t());
+    }
+
+    // finally - return a valid base and extension tuple
+    return std::make_tuple(fname.substr(0, ext_index), fname.substr(ext_index));
+}
+} // namespace details
+} // namespace spdlog

include/spdlog/details/file_helper.h

@@ -1,113 +1,35 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
-// Helper class for file sink
-// When failing to open a file, retry several times(5) with small delay between the tries(10 ms)
-// Throw spdlog_ex exception on errors
-
-#include "../details/log_msg.h"
-#include "../details/os.h"
-
-#include <cerrno>
-#include <chrono>
-#include <cstdio>
-#include <string>
-#include <thread>
+#include "spdlog/common.h"
 #include <tuple>
 
 namespace spdlog {
 namespace details {
 
+// Helper class for file sinks.
+// When failing to open a file, retry several times(5) with a delay interval(10 ms).
+// Throw spdlog_ex exception on errors.
+
 class file_helper
 {
-
 public:
-    const int open_tries = 5;
-    const int open_interval = 10;
-
     explicit file_helper() = default;
 
     file_helper(const file_helper &) = delete;
     file_helper &operator=(const file_helper &) = delete;
+    ~file_helper();
 
-    ~file_helper()
-    {
-        close();
-    }
-
-    void open(const filename_t &fname, bool truncate = false)
-    {
-        close();
-        auto *mode = truncate ? SPDLOG_FILENAME_T("wb") : SPDLOG_FILENAME_T("ab");
-        _filename = fname;
-        for (int tries = 0; tries < open_tries; ++tries)
-        {
-            if (!os::fopen_s(&_fd, fname, mode))
-            {
-                return;
-            }
-
-            details::os::sleep_for_millis(open_interval);
-        }
-
-        throw spdlog_ex("Failed opening file " + os::filename_to_str(_filename) + " for writing", errno);
-    }
-
-    void reopen(bool truncate)
-    {
-        if (_filename.empty())
-        {
-            throw spdlog_ex("Failed re opening file - was not opened before");
-        }
-        open(_filename, truncate);
-    }
-
-    void flush()
-    {
-        std::fflush(_fd);
-    }
-
-    void close()
-    {
-        if (_fd != nullptr)
-        {
-            std::fclose(_fd);
-            _fd = nullptr;
-        }
-    }
-
-    void write(const log_msg &msg)
-    {
-        size_t msg_size = msg.formatted.size();
-        auto data = msg.formatted.data();
-        if (std::fwrite(data, 1, msg_size, _fd) != msg_size)
-        {
-            throw spdlog_ex("Failed writing to file " + os::filename_to_str(_filename), errno);
-        }
-    }
-
-    size_t size() const
-    {
-        if (_fd == nullptr)
-        {
-            throw spdlog_ex("Cannot use size() on closed file " + os::filename_to_str(_filename));
-        }
-        return os::filesize(_fd);
-    }
-
-    const filename_t &filename() const
-    {
-        return _filename;
-    }
-
-    static bool file_exists(const filename_t &fname)
-    {
-        return os::file_exists(fname);
-    }
+    void open(const filename_t &fname, bool truncate = false);
+    void reopen(bool truncate);
+    void flush();
+    void close();
+    void write(const memory_buf_t &buf);
+    size_t size() const;
+    const filename_t &filename() const;
+    static bool file_exists(const filename_t &fname);
 
     //
     // return file path and its extension:
@@ -122,30 +44,17 @@ public:
     // ".mylog" => (".mylog". "")
     // "my_folder/.mylog" => ("my_folder/.mylog", "")
     // "my_folder/.mylog.txt" => ("my_folder/.mylog", ".txt")
-    static std::tuple<filename_t, filename_t> split_by_extenstion(const spdlog::filename_t &fname)
-    {
-        auto ext_index = fname.rfind('.');
-
-        // no valid extension found - return whole path and empty string as extension
-        if (ext_index == filename_t::npos || ext_index == 0 || ext_index == fname.size() - 1)
-        {
-            return std::make_tuple(fname, spdlog::filename_t());
-        }
-
-        // treat casese like "/etc/rc.d/somelogfile or "/abc/.hiddenfile"
-        auto folder_index = fname.rfind(details::os::folder_sep);
-        if (folder_index != fname.npos && folder_index >= ext_index - 1)
-        {
-            return std::make_tuple(fname, spdlog::filename_t());
-        }
-
-        // finally - return a valid base and extension tuple
-        return std::make_tuple(fname.substr(0, ext_index), fname.substr(ext_index));
-    }
+    static std::tuple<filename_t, filename_t> split_by_extension(const filename_t &fname);
 
 private:
-    FILE *_fd{nullptr};
+    const int open_tries = 5;
+    const int open_interval = 10;
+    std::FILE *fd_{nullptr};
     filename_t _filename;
 };
 } // namespace details
 } // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "file_helper-inl.h"
+#endif

include/spdlog/details/fmt_helper.h

@@ -0,0 +1,111 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+#pragma once
+
+#include <chrono>
+#include <type_traits>
+#include "spdlog/fmt/fmt.h"
+#include "spdlog/common.h"
+
+// Some fmt helpers to efficiently format and pad ints and strings
+namespace spdlog {
+namespace details {
+namespace fmt_helper {
+
+inline spdlog::string_view_t to_string_view(const memory_buf_t &buf) SPDLOG_NOEXCEPT
+{
+    return spdlog::string_view_t{buf.data(), buf.size()};
+}
+
+inline void append_string_view(spdlog::string_view_t view, memory_buf_t &dest)
+{
+    auto *buf_ptr = view.data();
+    if (buf_ptr != nullptr)
+    {
+        dest.append(buf_ptr, buf_ptr + view.size());
+    }
+}
+
+template<typename T>
+inline void append_int(T n, memory_buf_t &dest)
+{
+    fmt::format_int i(n);
+    dest.append(i.data(), i.data() + i.size());
+}
+
+template<typename T>
+inline unsigned count_digits(T n)
+{
+    using count_type = typename std::conditional<(sizeof(T) > sizeof(uint32_t)), uint64_t, uint32_t>::type;
+    return static_cast<unsigned>(fmt::internal::count_digits(static_cast<count_type>(n)));
+}
+
+inline void pad2(int n, memory_buf_t &dest)
+{
+    if (n > 99)
+    {
+        append_int(n, dest);
+    }
+    else if (n > 9) // 10-99
+    {
+        dest.push_back(static_cast<char>('0' + n / 10));
+        dest.push_back(static_cast<char>('0' + n % 10));
+    }
+    else if (n >= 0) // 0-9
+    {
+        dest.push_back('0');
+        dest.push_back(static_cast<char>('0' + n));
+    }
+    else // negatives (unlikely, but just in case, let fmt deal with it)
+    {
+        fmt::format_to(dest, "{:02}", n);
+    }
+}
+
+template<typename T>
+inline void pad_uint(T n, unsigned int width, memory_buf_t &dest)
+{
+    static_assert(std::is_unsigned<T>::value, "pad_uint must get unsigned T");
+    auto digits = count_digits(n);
+    if (width > digits)
+    {
+        const char *zeroes = "0000000000000000000";
+        dest.append(zeroes, zeroes + width - digits);
+    }
+    append_int(n, dest);
+}
+
+template<typename T>
+inline void pad3(T n, memory_buf_t &dest)
+{
+    pad_uint(n, 3, dest);
+}
+
+template<typename T>
+inline void pad6(T n, memory_buf_t &dest)
+{
+    pad_uint(n, 6, dest);
+}
+
+template<typename T>
+inline void pad9(T n, memory_buf_t &dest)
+{
+    pad_uint(n, 9, dest);
+}
+
+// return fraction of a second of the given time_point.
+// e.g.
+// fraction<std::milliseconds>(tp) -> will return the millis part of the second
+template<typename ToDuration>
+inline ToDuration time_fraction(log_clock::time_point tp)
+{
+    using std::chrono::duration_cast;
+    using std::chrono::seconds;
+    auto duration = tp.time_since_epoch();
+    auto secs = duration_cast<seconds>(duration);
+    return duration_cast<ToDuration>(duration) - duration_cast<ToDuration>(secs);
+}
+
+} // namespace fmt_helper
+} // namespace details
+} // namespace spdlog

include/spdlog/details/log_msg-inl.h

@@ -0,0 +1,34 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/details/log_msg.h"
+#endif
+
+#include "spdlog/details/os.h"
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE log_msg::log_msg(spdlog::source_loc loc, string_view_t logger_name, spdlog::level::level_enum lvl, spdlog::string_view_t msg)
+    : logger_name(logger_name)
+    , level(lvl)
+#ifndef SPDLOG_NO_DATETIME
+    , time(os::now())
+#endif
+
+#ifndef SPDLOG_NO_THREAD_ID
+    , thread_id(os::thread_id())
+#endif
+    , source(loc)
+    , payload(msg)
+{}
+
+SPDLOG_INLINE log_msg::log_msg(string_view_t logger_name, spdlog::level::level_enum lvl, spdlog::string_view_t msg)
+    : log_msg(source_loc{}, logger_name, lvl, msg)
+{}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/log_msg.h

@@ -1,48 +1,35 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
-#include "../common.h"
-#include "../details/os.h"
-
+#include "spdlog/common.h"
 #include <string>
-#include <utility>
 
 namespace spdlog {
 namespace details {
 struct log_msg
 {
     log_msg() = default;
-    log_msg(const std::string *loggers_name, level::level_enum lvl)
-        : logger_name(loggers_name)
-        , level(lvl)
-    {
-#ifndef SPDLOG_NO_DATETIME
-        time = os::now();
-#endif
+    log_msg(source_loc loc, string_view_t logger_name, level::level_enum lvl, string_view_t msg);
+    log_msg(string_view_t logger_name, level::level_enum lvl, string_view_t msg);
+    log_msg(const log_msg &other) = default;
 
-#ifndef SPDLOG_NO_THREAD_ID
-        thread_id = os::thread_id();
-#endif
-    }
-
-    log_msg(const log_msg &other) = delete;
-    log_msg &operator=(log_msg &&other) = delete;
-    log_msg(log_msg &&other) = delete;
-
-    const std::string *logger_name{nullptr};
-    level::level_enum level;
+    string_view_t logger_name;
+    level::level_enum level{level::off};
     log_clock::time_point time;
-    size_t thread_id;
-    fmt::MemoryWriter raw;
-    fmt::MemoryWriter formatted;
-    size_t msg_id{0};
-    // wrap this range with color codes
-    size_t color_range_start{0};
-    size_t color_range_end{0};
+    size_t thread_id{0};
+
+    // wrapping the formatted text with color (updated by pattern_formatter).
+    mutable size_t color_range_start{0};
+    mutable size_t color_range_end{0};
+
+    source_loc source;
+    string_view_t payload;
 };
 } // namespace details
 } // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "log_msg-inl.h"
+#endif

include/spdlog/details/log_msg_buffer-inl.h

@@ -0,0 +1,60 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/details/log_msg_buffer.h"
+#endif
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg &orig_msg)
+    : log_msg{orig_msg}
+{
+    buffer.append(logger_name.begin(), logger_name.end());
+    buffer.append(payload.begin(), payload.end());
+    update_string_views();
+}
+
+SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg_buffer &other)
+    : log_msg{other}
+{
+    buffer.append(logger_name.begin(), logger_name.end());
+    buffer.append(payload.begin(), payload.end());
+    update_string_views();
+}
+
+SPDLOG_INLINE log_msg_buffer::log_msg_buffer(log_msg_buffer &&other)
+    : log_msg{std::move(other)}
+    , buffer{std::move(other.buffer)}
+{
+    update_string_views();
+}
+
+SPDLOG_INLINE log_msg_buffer &log_msg_buffer::operator=(const log_msg_buffer &other)
+{
+    log_msg::operator=(other);
+    buffer.clear();
+    buffer.append(other.buffer.data(), other.buffer.data() + other.buffer.size());
+    update_string_views();
+    return *this;
+}
+
+SPDLOG_INLINE log_msg_buffer &log_msg_buffer::operator=(log_msg_buffer &&other)
+{
+    log_msg::operator=(std::move(other));
+    buffer = std::move(other.buffer);
+    update_string_views();
+    return *this;
+}
+
+SPDLOG_INLINE void log_msg_buffer::update_string_views()
+{
+    logger_name = string_view_t{buffer.data(), logger_name.size()};
+    payload = string_view_t{buffer.data() + logger_name.size(), payload.size()};
+}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/log_msg_buffer.h

@@ -0,0 +1,33 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include "spdlog/details/log_msg.h"
+
+namespace spdlog {
+namespace details {
+
+// Extend log_msg with internal buffer to store its payload.
+// THis is needed since log_msg holds string_views that points to stack data.
+
+class log_msg_buffer : public log_msg
+{
+    memory_buf_t buffer;
+    void update_string_views();
+
+public:
+    log_msg_buffer() = default;
+    explicit log_msg_buffer(const log_msg &orig_msg);
+    log_msg_buffer(const log_msg_buffer &other);
+    log_msg_buffer(log_msg_buffer &&other);
+    log_msg_buffer &operator=(const log_msg_buffer &other);
+    log_msg_buffer &operator=(log_msg_buffer &&other);
+};
+
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "log_msg_buffer-inl.h"
+#endif

include/spdlog/details/logger_impl.h

@@ -1,368 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-#include "../logger.h"
-
-#include <memory>
-#include <string>
-
-// create logger with given name, sinks and the default pattern formatter
-// all other ctors will call this one
-template<class It>
-inline spdlog::logger::logger(std::string logger_name, const It &begin, const It &end)
-    : _name(std::move(logger_name))
-    , _sinks(begin, end)
-    , _formatter(std::make_shared<pattern_formatter>("%+"))
-    , _level(level::info)
-    , _flush_level(level::off)
-    , _last_err_time(0)
-    , _msg_counter(1) // message counter will start from 1. 0-message id will be reserved for controll messages
-{
-    _err_handler = [this](const std::string &msg) { this->_default_err_handler(msg); };
-}
-
-// ctor with sinks as init list
-inline spdlog::logger::logger(const std::string &logger_name, sinks_init_list sinks_list)
-    : logger(logger_name, sinks_list.begin(), sinks_list.end())
-{
-}
-
-// ctor with single sink
-inline spdlog::logger::logger(const std::string &logger_name, spdlog::sink_ptr single_sink)
-    : logger(logger_name, {std::move(single_sink)})
-{
-}
-
-inline spdlog::logger::~logger() = default;
-
-inline void spdlog::logger::set_formatter(spdlog::formatter_ptr msg_formatter)
-{
-    _set_formatter(std::move(msg_formatter));
-}
-
-inline void spdlog::logger::set_pattern(const std::string &pattern, pattern_time_type pattern_time)
-{
-    _set_pattern(pattern, pattern_time);
-}
-
-template<typename... Args>
-inline void spdlog::logger::log(level::level_enum lvl, const char *fmt, const Args &... args)
-{
-    if (!should_log(lvl))
-    {
-        return;
-    }
-
-    try
-    {
-        details::log_msg log_msg(&_name, lvl);
-
-#if defined(SPDLOG_FMT_PRINTF)
-        fmt::printf(log_msg.raw, fmt, args...);
-#else
-        log_msg.raw.write(fmt, args...);
-#endif
-        _sink_it(log_msg);
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception in logger " + _name);
-        throw;
-    }
-}
-
-template<typename... Args>
-inline void spdlog::logger::log(level::level_enum lvl, const char *msg)
-{
-    if (!should_log(lvl))
-    {
-        return;
-    }
-    try
-    {
-        details::log_msg log_msg(&_name, lvl);
-        log_msg.raw << msg;
-        _sink_it(log_msg);
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception in logger " + _name);
-        throw;
-    }
-}
-
-template<typename T>
-inline void spdlog::logger::log(level::level_enum lvl, const T &msg)
-{
-    if (!should_log(lvl))
-    {
-        return;
-    }
-    try
-    {
-        details::log_msg log_msg(&_name, lvl);
-        log_msg.raw << msg;
-        _sink_it(log_msg);
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception in logger " + _name);
-        throw;
-    }
-}
-
-template<typename Arg1, typename... Args>
-inline void spdlog::logger::trace(const char *fmt, const Arg1 &arg1, const Args &... args)
-{
-    log(level::trace, fmt, arg1, args...);
-}
-
-template<typename Arg1, typename... Args>
-inline void spdlog::logger::debug(const char *fmt, const Arg1 &arg1, const Args &... args)
-{
-    log(level::debug, fmt, arg1, args...);
-}
-
-template<typename Arg1, typename... Args>
-inline void spdlog::logger::info(const char *fmt, const Arg1 &arg1, const Args &... args)
-{
-    log(level::info, fmt, arg1, args...);
-}
-
-template<typename Arg1, typename... Args>
-inline void spdlog::logger::warn(const char *fmt, const Arg1 &arg1, const Args &... args)
-{
-    log(level::warn, fmt, arg1, args...);
-}
-
-template<typename Arg1, typename... Args>
-inline void spdlog::logger::error(const char *fmt, const Arg1 &arg1, const Args &... args)
-{
-    log(level::err, fmt, arg1, args...);
-}
-
-template<typename Arg1, typename... Args>
-inline void spdlog::logger::critical(const char *fmt, const Arg1 &arg1, const Args &... args)
-{
-    log(level::critical, fmt, arg1, args...);
-}
-
-template<typename T>
-inline void spdlog::logger::trace(const T &msg)
-{
-    log(level::trace, msg);
-}
-
-template<typename T>
-inline void spdlog::logger::debug(const T &msg)
-{
-    log(level::debug, msg);
-}
-
-template<typename T>
-inline void spdlog::logger::info(const T &msg)
-{
-    log(level::info, msg);
-}
-
-template<typename T>
-inline void spdlog::logger::warn(const T &msg)
-{
-    log(level::warn, msg);
-}
-
-template<typename T>
-inline void spdlog::logger::error(const T &msg)
-{
-    log(level::err, msg);
-}
-
-template<typename T>
-inline void spdlog::logger::critical(const T &msg)
-{
-    log(level::critical, msg);
-}
-
-#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
-#include <codecvt>
-#include <locale>
-
-template<typename... Args>
-inline void spdlog::logger::log(level::level_enum lvl, const wchar_t *msg)
-{
-    std::wstring_convert<std::codecvt_utf8<wchar_t>> conv;
-
-    log(lvl, conv.to_bytes(msg));
-}
-
-template<typename... Args>
-inline void spdlog::logger::log(level::level_enum lvl, const wchar_t *fmt, const Args &... args)
-{
-    fmt::WMemoryWriter wWriter;
-
-    wWriter.write(fmt, args...);
-    log(lvl, wWriter.c_str());
-}
-
-template<typename... Args>
-inline void spdlog::logger::trace(const wchar_t *fmt, const Args &... args)
-{
-    log(level::trace, fmt, args...);
-}
-
-template<typename... Args>
-inline void spdlog::logger::debug(const wchar_t *fmt, const Args &... args)
-{
-    log(level::debug, fmt, args...);
-}
-
-template<typename... Args>
-inline void spdlog::logger::info(const wchar_t *fmt, const Args &... args)
-{
-    log(level::info, fmt, args...);
-}
-
-template<typename... Args>
-inline void spdlog::logger::warn(const wchar_t *fmt, const Args &... args)
-{
-    log(level::warn, fmt, args...);
-}
-
-template<typename... Args>
-inline void spdlog::logger::error(const wchar_t *fmt, const Args &... args)
-{
-    log(level::err, fmt, args...);
-}
-
-template<typename... Args>
-inline void spdlog::logger::critical(const wchar_t *fmt, const Args &... args)
-{
-    log(level::critical, fmt, args...);
-}
-
-#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
-
-//
-// name and level
-//
-inline const std::string &spdlog::logger::name() const
-{
-    return _name;
-}
-
-inline void spdlog::logger::set_level(spdlog::level::level_enum log_level)
-{
-    _level.store(log_level);
-}
-
-inline void spdlog::logger::set_error_handler(spdlog::log_err_handler err_handler)
-{
-    _err_handler = std::move(err_handler);
-}
-
-inline spdlog::log_err_handler spdlog::logger::error_handler()
-{
-    return _err_handler;
-}
-
-inline void spdlog::logger::flush_on(level::level_enum log_level)
-{
-    _flush_level.store(log_level);
-}
-
-inline spdlog::level::level_enum spdlog::logger::level() const
-{
-    return static_cast<spdlog::level::level_enum>(_level.load(std::memory_order_relaxed));
-}
-
-inline bool spdlog::logger::should_log(spdlog::level::level_enum msg_level) const
-{
-    return msg_level >= _level.load(std::memory_order_relaxed);
-}
-
-//
-// protected virtual called at end of each user log call (if enabled) by the line_logger
-//
-inline void spdlog::logger::_sink_it(details::log_msg &msg)
-{
-#if defined(SPDLOG_ENABLE_MESSAGE_COUNTER)
-    _incr_msg_counter(msg);
-#endif
-    _formatter->format(msg);
-    for (auto &sink : _sinks)
-    {
-        if (sink->should_log(msg.level))
-        {
-            sink->log(msg);
-        }
-    }
-
-    if (_should_flush_on(msg))
-    {
-        flush();
-    }
-}
-
-inline void spdlog::logger::_set_pattern(const std::string &pattern, pattern_time_type pattern_time)
-{
-    _formatter = std::make_shared<pattern_formatter>(pattern, pattern_time);
-}
-
-inline void spdlog::logger::_set_formatter(formatter_ptr msg_formatter)
-{
-    _formatter = std::move(msg_formatter);
-}
-
-inline void spdlog::logger::flush()
-{
-    for (auto &sink : _sinks)
-    {
-        sink->flush();
-    }
-}
-
-inline void spdlog::logger::_default_err_handler(const std::string &msg)
-{
-    auto now = time(nullptr);
-    if (now - _last_err_time < 60)
-    {
-        return;
-    }
-    _last_err_time = now;
-    auto tm_time = details::os::localtime(now);
-    char date_buf[100];
-    std::strftime(date_buf, sizeof(date_buf), "%Y-%m-%d %H:%M:%S", &tm_time);
-    fmt::print(stderr, "[*** LOG ERROR ***] [{}] [{}] {}\n", date_buf, name(), msg);
-}
-
-inline bool spdlog::logger::_should_flush_on(const details::log_msg &msg)
-{
-    const auto flush_level = _flush_level.load(std::memory_order_relaxed);
-    return (msg.level >= flush_level) && (msg.level != level::off);
-}
-
-inline void spdlog::logger::_incr_msg_counter(details::log_msg &msg)
-{
-    msg.msg_id = _msg_counter.fetch_add(1, std::memory_order_relaxed);
-}
-
-inline const std::vector<spdlog::sink_ptr> &spdlog::logger::sinks() const
-{
-    return _sinks;
-}

include/spdlog/details/mpmc_blocking_q.h

@@ -1,57 +1,52 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
 #pragma once
 
-//
-// Copyright(c) 2018 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
+// multi producer-multi consumer blocking queue.
+// enqueue(..) - will block until room found to put the new message.
+// enqueue_nowait(..) - will return immediately with false if no room left in
+// the queue.
+// dequeue_for(..) - will block until the queue is not empty or timeout have
+// passed.
 
-// async log helper :
-// multi producer-multi consumer blocking queue
-// enqueue(..) - will block until room found to put the new message
-// enqueue_nowait(..) - will return immediatly with false if no room left in the queue
-// dequeue_for(..) - will block until the queue is not empty or timeout passed
+#include "spdlog/details/circular_q.h"
 
 #include <condition_variable>
 #include <mutex>
-#include <queue>
 
 namespace spdlog {
 namespace details {
 
 template<typename T>
-class mpmc_bounded_queue
+class mpmc_blocking_queue
 {
 public:
     using item_type = T;
-    explicit mpmc_bounded_queue(size_t max_items)
-        : max_items_(max_items)
-    {
-    }
+    explicit mpmc_blocking_queue(size_t max_items)
+        : q_(max_items)
+    {}
 
+#ifndef __MINGW32__
     // try to enqueue and block if no room left
     void enqueue(T &&item)
     {
         {
             std::unique_lock<std::mutex> lock(queue_mutex_);
-            pop_cv_.wait(lock, [this] { return this->q_.size() < this->max_items_; });
-            q_.push(std::move(item));
+            pop_cv_.wait(lock, [this] { return !this->q_.full(); });
+            q_.push_back(std::move(item));
         }
         push_cv_.notify_one();
     }
 
-    // try to enqueue and return immdeialty false if no room left
-    bool enqueue_nowait(T &&item)
+    // enqueue immediately. overrun oldest message in the queue if no room left.
+    void enqueue_nowait(T &&item)
     {
         {
             std::unique_lock<std::mutex> lock(queue_mutex_);
-            if (q_.size() == this->max_items_)
-            {
-                return false;
-            }
-            q_.push(std::forward<T>(item));
+            q_.push_back(std::move(item));
         }
         push_cv_.notify_one();
-        return true;
     }
 
     // try to dequeue item. if no item found. wait upto timeout and try again
@@ -60,25 +55,66 @@ public:
     {
         {
             std::unique_lock<std::mutex> lock(queue_mutex_);
-            if (!push_cv_.wait_for(lock, wait_duration, [this] { return this->q_.size() > 0; }))
+            if (!push_cv_.wait_for(lock, wait_duration, [this] { return !this->q_.empty(); }))
             {
                 return false;
             }
-
             popped_item = std::move(q_.front());
-            q_.pop();
+            q_.pop_front();
         }
         pop_cv_.notify_one();
         return true;
     }
 
+#else
+    // apparently mingw deadlocks if the mutex is released before cv.notify_one(),
+    // so release the mutex at the very end each function.
+
+    // try to enqueue and block if no room left
+    void enqueue(T &&item)
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        pop_cv_.wait(lock, [this] { return !this->q_.full(); });
+        q_.push_back(std::move(item));
+        push_cv_.notify_one();
+    }
+
+    // enqueue immediately. overrun oldest message in the queue if no room left.
+    void enqueue_nowait(T &&item)
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        q_.push_back(std::move(item));
+        push_cv_.notify_one();
+    }
+
+    // try to dequeue item. if no item found. wait upto timeout and try again
+    // Return true, if succeeded dequeue item, false otherwise
+    bool dequeue_for(T &popped_item, std::chrono::milliseconds wait_duration)
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        if (!push_cv_.wait_for(lock, wait_duration, [this] { return !this->q_.empty(); }))
+        {
+            return false;
+        }
+        popped_item = std::move(q_.front());
+        q_.pop_front();
+        pop_cv_.notify_one();
+        return true;
+    }
+
+#endif
+
+    size_t overrun_counter()
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        return q_.overrun_counter();
+    }
+
 private:
-    size_t max_items_;
     std::mutex queue_mutex_;
     std::condition_variable push_cv_;
     std::condition_variable pop_cv_;
-
-    std::queue<T> q_;
+    spdlog::details::circular_q<T> q_;
 };
 } // namespace details
 } // namespace spdlog

include/spdlog/details/null_mutex.h

@@ -1,20 +1,19 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
 #include <atomic>
+#include <utility>
 // null, no cost dummy "mutex" and dummy "atomic" int
 
 namespace spdlog {
 namespace details {
 struct null_mutex
 {
-    void lock() {}
-    void unlock() {}
-    bool try_lock()
+    void lock() const {}
+    void unlock() const {}
+    bool try_lock() const
     {
         return true;
     }
@@ -25,19 +24,24 @@ struct null_atomic_int
     int value;
     null_atomic_int() = default;
 
-    explicit null_atomic_int(int val)
-        : value(val)
-    {
-    }
+    explicit null_atomic_int(int new_value)
+        : value(new_value)
+    {}
 
-    int load(std::memory_order) const
+    int load(std::memory_order = std::memory_order_relaxed) const
     {
         return value;
     }
 
-    void store(int val)
+    void store(int new_value, std::memory_order = std::memory_order_relaxed)
     {
-        value = val;
+        value = new_value;
+    }
+
+    int exchange(int new_value, std::memory_order = std::memory_order_relaxed)
+    {
+        std::swap(new_value, value);
+        return new_value; // return value before the call
     }
 };
 

include/spdlog/details/os-inl.h

@@ -0,0 +1,465 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/details/os.h"
+#endif
+
+#include "spdlog/common.h"
+
+#include <algorithm>
+#include <chrono>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <string>
+#include <thread>
+#include <array>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#ifdef _WIN32
+
+#ifndef NOMINMAX
+#define NOMINMAX // prevent windows redefining min/max
+#endif
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <io.h>      // _get_osfhandle and _isatty support
+#include <process.h> //  _get_pid support
+#include <windows.h>
+
+#ifdef __MINGW32__
+#include <share.h>
+#endif
+
+#if defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)
+#include <limits>
+#endif
+
+#else // unix
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef __linux__
+#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
+
+#elif defined(_AIX)
+#include <pthread.h> // for pthread_getthreadid_np
+
+#elif defined(__DragonFly__) || defined(__FreeBSD__)
+#include <pthread_np.h> // for pthread_getthreadid_np
+
+#elif defined(__NetBSD__)
+#include <lwp.h> // for _lwp_self
+
+#elif defined(__sun)
+#include <thread.h> // for thr_self
+#endif
+
+#endif // unix
+
+#ifndef __has_feature      // Clang - feature checking macros.
+#define __has_feature(x) 0 // Compatibility with non-clang compilers.
+#endif
+
+namespace spdlog {
+namespace details {
+namespace os {
+
+SPDLOG_INLINE spdlog::log_clock::time_point now() SPDLOG_NOEXCEPT
+{
+
+#if defined __linux__ && defined SPDLOG_CLOCK_COARSE
+    timespec ts;
+    ::clock_gettime(CLOCK_REALTIME_COARSE, &ts);
+    return std::chrono::time_point<log_clock, typename log_clock::duration>(
+        std::chrono::duration_cast<typename log_clock::duration>(std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec)));
+
+#else
+    return log_clock::now();
+#endif
+}
+SPDLOG_INLINE std::tm localtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    std::tm tm;
+    localtime_s(&tm, &time_tt);
+#else
+    std::tm tm;
+    localtime_r(&time_tt, &tm);
+#endif
+    return tm;
+}
+
+SPDLOG_INLINE std::tm localtime() SPDLOG_NOEXCEPT
+{
+    std::time_t now_t = time(nullptr);
+    return localtime(now_t);
+}
+
+SPDLOG_INLINE std::tm gmtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    std::tm tm;
+    gmtime_s(&tm, &time_tt);
+#else
+    std::tm tm;
+    gmtime_r(&time_tt, &tm);
+#endif
+    return tm;
+}
+
+SPDLOG_INLINE std::tm gmtime() SPDLOG_NOEXCEPT
+{
+    std::time_t now_t = time(nullptr);
+    return gmtime(now_t);
+}
+
+SPDLOG_INLINE void prevent_child_fd(FILE *f)
+{
+
+#ifdef _WIN32
+#if !defined(__cplusplus_winrt)
+    auto file_handle = reinterpret_cast<HANDLE>(_get_osfhandle(_fileno(f)));
+    if (!::SetHandleInformation(file_handle, HANDLE_FLAG_INHERIT, 0))
+        SPDLOG_THROW(spdlog_ex("SetHandleInformation failed", errno));
+#endif
+#else
+    auto fd = fileno(f);
+    if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
+    {
+        SPDLOG_THROW(spdlog_ex("fcntl with FD_CLOEXEC failed", errno));
+    }
+#endif
+}
+
+// fopen_s on non windows for writing
+SPDLOG_INLINE bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode)
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+    *fp = _wfsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
+#else
+    *fp = _fsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
+#endif
+#else // unix
+    *fp = fopen((filename.c_str()), mode.c_str());
+#endif
+
+#ifdef SPDLOG_PREVENT_CHILD_FD
+    if (*fp != nullptr)
+    {
+        prevent_child_fd(*fp);
+    }
+#endif
+    return *fp == nullptr;
+}
+
+SPDLOG_INLINE int remove(const filename_t &filename) SPDLOG_NOEXCEPT
+{
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+    return _wremove(filename.c_str());
+#else
+    return std::remove(filename.c_str());
+#endif
+}
+
+SPDLOG_INLINE int remove_if_exists(const filename_t &filename) SPDLOG_NOEXCEPT
+{
+    return file_exists(filename) ? remove(filename) : 0;
+}
+
+SPDLOG_INLINE int rename(const filename_t &filename1, const filename_t &filename2) SPDLOG_NOEXCEPT
+{
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+    return _wrename(filename1.c_str(), filename2.c_str());
+#else
+    return std::rename(filename1.c_str(), filename2.c_str());
+#endif
+}
+
+// Return true if file exists
+SPDLOG_INLINE bool file_exists(const filename_t &filename) SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+    auto attribs = GetFileAttributesW(filename.c_str());
+#else
+    auto attribs = GetFileAttributesA(filename.c_str());
+#endif
+    return (attribs != INVALID_FILE_ATTRIBUTES && !(attribs & FILE_ATTRIBUTE_DIRECTORY));
+#else // common linux/unix all have the stat system call
+    struct stat buffer;
+    return (::stat(filename.c_str(), &buffer) == 0);
+#endif
+}
+
+// Return file size according to open FILE* object
+SPDLOG_INLINE size_t filesize(FILE *f)
+{
+    if (f == nullptr)
+    {
+        SPDLOG_THROW(spdlog_ex("Failed getting file size. fd is null"));
+    }
+#if defined(_WIN32) && !defined(__CYGWIN__)
+    int fd = _fileno(f);
+#if _WIN64 // 64 bits
+    __int64 ret = _filelengthi64(fd);
+    if (ret >= 0)
+    {
+        return static_cast<size_t>(ret);
+    }
+
+#else // windows 32 bits
+    long ret = _filelength(fd);
+    if (ret >= 0)
+    {
+        return static_cast<size_t>(ret);
+    }
+#endif
+
+#else // unix
+    int fd = fileno(f);
+// 64 bits(but not in osx or cygwin, where fstat64 is deprecated)
+#if (defined(__linux__) || defined(__sun) || defined(_AIX)) && (defined(__LP64__) || defined(_LP64))
+    struct stat64 st;
+    if (::fstat64(fd, &st) == 0)
+    {
+        return static_cast<size_t>(st.st_size);
+    }
+#else // unix 32 bits or cygwin
+    struct stat st;
+
+    if (::fstat(fd, &st) == 0)
+    {
+        return static_cast<size_t>(st.st_size);
+    }
+#endif
+#endif
+    SPDLOG_THROW(spdlog_ex("Failed getting file size from fd", errno));
+}
+
+// Return utc offset in minutes or throw spdlog_ex on failure
+SPDLOG_INLINE int utc_minutes_offset(const std::tm &tm)
+{
+
+#ifdef _WIN32
+#if _WIN32_WINNT < _WIN32_WINNT_WS08
+    TIME_ZONE_INFORMATION tzinfo;
+    auto rv = GetTimeZoneInformation(&tzinfo);
+#else
+    DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
+    auto rv = GetDynamicTimeZoneInformation(&tzinfo);
+#endif
+    if (rv == TIME_ZONE_ID_INVALID)
+        SPDLOG_THROW(spdlog::spdlog_ex("Failed getting timezone info. ", errno));
+
+    int offset = -tzinfo.Bias;
+    if (tm.tm_isdst)
+    {
+        offset -= tzinfo.DaylightBias;
+    }
+    else
+    {
+        offset -= tzinfo.StandardBias;
+    }
+    return offset;
+#else
+
+#if defined(sun) || defined(__sun) || defined(_AIX)
+    // 'tm_gmtoff' field is BSD extension and it's missing on SunOS/Solaris
+    struct helper
+    {
+        static long int calculate_gmt_offset(const std::tm &localtm = details::os::localtime(), const std::tm &gmtm = details::os::gmtime())
+        {
+            int local_year = localtm.tm_year + (1900 - 1);
+            int gmt_year = gmtm.tm_year + (1900 - 1);
+
+            long int days = (
+                // difference in day of year
+                localtm.tm_yday -
+                gmtm.tm_yday
+
+                // + intervening leap days
+                + ((local_year >> 2) - (gmt_year >> 2)) - (local_year / 100 - gmt_year / 100) +
+                ((local_year / 100 >> 2) - (gmt_year / 100 >> 2))
+
+                // + difference in years * 365 */
+                + (long int)(local_year - gmt_year) * 365);
+
+            long int hours = (24 * days) + (localtm.tm_hour - gmtm.tm_hour);
+            long int mins = (60 * hours) + (localtm.tm_min - gmtm.tm_min);
+            long int secs = (60 * mins) + (localtm.tm_sec - gmtm.tm_sec);
+
+            return secs;
+        }
+    };
+
+    auto offset_seconds = helper::calculate_gmt_offset(tm);
+#else
+    auto offset_seconds = tm.tm_gmtoff;
+#endif
+
+    return static_cast<int>(offset_seconds / 60);
+#endif
+}
+
+// Return current thread id as size_t
+// It exists because the std::this_thread::get_id() is much slower(especially
+// under VS 2013)
+SPDLOG_INLINE size_t _thread_id() SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+    return static_cast<size_t>(::GetCurrentThreadId());
+#elif defined(__linux__)
+#if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
+#define SYS_gettid __NR_gettid
+#endif
+    return static_cast<size_t>(syscall(SYS_gettid));
+#elif defined(_AIX) || defined(__DragonFly__) || defined(__FreeBSD__)
+    return static_cast<size_t>(pthread_getthreadid_np());
+#elif defined(__NetBSD__)
+    return static_cast<size_t>(_lwp_self());
+#elif defined(__OpenBSD__)
+    return static_cast<size_t>(getthrid());
+#elif defined(__sun)
+    return static_cast<size_t>(thr_self());
+#elif __APPLE__
+    uint64_t tid;
+    pthread_threadid_np(nullptr, &tid);
+    return static_cast<size_t>(tid);
+#else // Default to standard C++11 (other Unix)
+    return static_cast<size_t>(std::hash<std::thread::id>()(std::this_thread::get_id()));
+#endif
+}
+
+// Return current thread id as size_t (from thread local storage)
+SPDLOG_INLINE size_t thread_id() SPDLOG_NOEXCEPT
+{
+#if defined(SPDLOG_NO_TLS)
+    return _thread_id();
+#else // cache thread id in tls
+    static thread_local const size_t tid = _thread_id();
+    return tid;
+#endif
+}
+
+// This is avoid msvc issue in sleep_for that happens if the clock changes.
+// See https://github.com/gabime/spdlog/issues/609
+SPDLOG_INLINE void sleep_for_millis(int milliseconds) SPDLOG_NOEXCEPT
+{
+#if defined(_WIN32)
+    ::Sleep(milliseconds);
+#else
+    std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds));
+#endif
+}
+
+// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+SPDLOG_INLINE std::string filename_to_str(const filename_t &filename)
+{
+    memory_buf_t buf;
+    wstr_to_utf8buf(filename, buf);
+    return fmt::to_string(buf);
+}
+#else
+SPDLOG_INLINE std::string filename_to_str(const filename_t &filename)
+{
+    return filename;
+}
+#endif
+
+SPDLOG_INLINE int pid() SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    return static_cast<int>(::GetCurrentProcessId());
+#else
+    return static_cast<int>(::getpid());
+#endif
+}
+
+// Determine if the terminal supports colors
+// Source: https://github.com/agauniyal/rang/
+SPDLOG_INLINE bool is_color_terminal() SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+    return true;
+#else
+    static constexpr std::array<const char *, 14> Terms = {
+        {"ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux", "msys", "putty", "rxvt", "screen", "vt100", "xterm"}};
+
+    const char *env_p = std::getenv("TERM");
+    if (env_p == nullptr)
+    {
+        return false;
+    }
+
+    static const bool result =
+        std::any_of(std::begin(Terms), std::end(Terms), [&](const char *term) { return std::strstr(env_p, term) != nullptr; });
+    return result;
+#endif
+}
+
+// Detrmine if the terminal attached
+// Source: https://github.com/agauniyal/rang/
+SPDLOG_INLINE bool in_terminal(FILE *file) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    return _isatty(_fileno(file)) != 0;
+#else
+    return isatty(fileno(file)) != 0;
+#endif
+}
+
+#if (defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)) && defined(_WIN32)
+SPDLOG_INLINE void wstr_to_utf8buf(wstring_view_t wstr, memory_buf_t &target)
+{
+    if (wstr.size() > static_cast<size_t>(std::numeric_limits<int>::max()))
+    {
+        SPDLOG_THROW(spdlog::spdlog_ex("UTF-16 string is too big to be converted to UTF-8"));
+    }
+
+    int wstr_size = static_cast<int>(wstr.size());
+    if (wstr_size == 0)
+    {
+        target.resize(0);
+        return;
+    }
+
+    int result_size = static_cast<int>(target.capacity());
+    if ((wstr_size + 1) * 2 > result_size)
+    {
+        result_size = ::WideCharToMultiByte(CP_UTF8, 0, wstr.data(), wstr_size, NULL, 0, NULL, NULL);
+    }
+
+    if (result_size > 0)
+    {
+        target.resize(result_size);
+        result_size = ::WideCharToMultiByte(CP_UTF8, 0, wstr.data(), wstr_size, target.data(), result_size, NULL, NULL);
+
+        if (result_size > 0)
+        {
+            target.resize(result_size);
+            return;
+        }
+    }
+
+    SPDLOG_THROW(spdlog::spdlog_ex(fmt::format("WideCharToMultiByte failed. Last error: {}", ::GetLastError())));
+}
+#endif // (defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)) && defined(_WIN32)
+
+} // namespace os
+} // namespace details
+} // namespace spdlog

include/spdlog/details/os.h

@@ -1,122 +1,24 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
+
 #pragma once
 
-#include "../common.h"
-
-#include <algorithm>
-#include <chrono>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-#include <functional>
-#include <string>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <thread>
-
-#ifdef _WIN32
-
-#ifndef NOMINMAX
-#define NOMINMAX // prevent windows redefining min/max
-#endif
-
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
-#include <io.h>      // _get_osfhandle and _isatty support
-#include <process.h> //  _get_pid support
-#include <windows.h>
-
-#ifdef __MINGW32__
-#include <share.h>
-#endif
-
-#else // unix
-
-#include <fcntl.h>
-#include <unistd.h>
-
-#ifdef __linux__
-#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
-
-#elif __FreeBSD__
-#include <sys/thr.h> //Use thr_self() syscall under FreeBSD to get thread id
-#endif
-
-#endif // unix
-
-#ifndef __has_feature      // Clang - feature checking macros.
-#define __has_feature(x) 0 // Compatibility with non-clang compilers.
-#endif
+#include "spdlog/common.h"
+#include <ctime> // std::time_t
 
 namespace spdlog {
 namespace details {
 namespace os {
 
-inline spdlog::log_clock::time_point now()
-{
+spdlog::log_clock::time_point now() SPDLOG_NOEXCEPT;
 
-#if defined __linux__ && defined SPDLOG_CLOCK_COARSE
-    timespec ts;
-    ::clock_gettime(CLOCK_REALTIME_COARSE, &ts);
-    return std::chrono::time_point<log_clock, typename log_clock::duration>(
-        std::chrono::duration_cast<typename log_clock::duration>(std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec)));
+std::tm localtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT;
 
-#else
-    return log_clock::now();
-#endif
-}
-inline std::tm localtime(const std::time_t &time_tt)
-{
+std::tm localtime() SPDLOG_NOEXCEPT;
 
-#ifdef _WIN32
-    std::tm tm;
-    localtime_s(&tm, &time_tt);
-#else
-    std::tm tm;
-    localtime_r(&time_tt, &tm);
-#endif
-    return tm;
-}
+std::tm gmtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT;
 
-inline std::tm localtime()
-{
-    std::time_t now_t = time(nullptr);
-    return localtime(now_t);
-}
-
-inline std::tm gmtime(const std::time_t &time_tt)
-{
-
-#ifdef _WIN32
-    std::tm tm;
-    gmtime_s(&tm, &time_tt);
-#else
-    std::tm tm;
-    gmtime_r(&time_tt, &tm);
-#endif
-    return tm;
-}
-
-inline std::tm gmtime()
-{
-    std::time_t now_t = time(nullptr);
-    return gmtime(now_t);
-}
-inline bool operator==(const std::tm &tm1, const std::tm &tm2)
-{
-    return (tm1.tm_sec == tm2.tm_sec && tm1.tm_min == tm2.tm_min && tm1.tm_hour == tm2.tm_hour && tm1.tm_mday == tm2.tm_mday &&
-            tm1.tm_mon == tm2.tm_mon && tm1.tm_year == tm2.tm_year && tm1.tm_isdst == tm2.tm_isdst);
-}
-
-inline bool operator!=(const std::tm &tm1, const std::tm &tm2)
-{
-    return !(tm1 == tm2);
-}
+std::tm gmtime() SPDLOG_NOEXCEPT;
 
 // eol definition
 #if !defined(SPDLOG_EOL)
@@ -131,349 +33,66 @@ SPDLOG_CONSTEXPR static const char *default_eol = SPDLOG_EOL;
 
 // folder separator
 #ifdef _WIN32
-SPDLOG_CONSTEXPR static const char folder_sep = '\\';
+const char folder_sep = '\\';
 #else
 SPDLOG_CONSTEXPR static const char folder_sep = '/';
 #endif
 
-inline void prevent_child_fd(FILE *f)
-{
-
-#ifdef _WIN32
-#if !defined(__cplusplus_winrt)
-    auto file_handle = (HANDLE)_get_osfhandle(_fileno(f));
-    if (!::SetHandleInformation(file_handle, HANDLE_FLAG_INHERIT, 0))
-        throw spdlog_ex("SetHandleInformation failed", errno);
-#endif
-#else
-    auto fd = fileno(f);
-    if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
-    {
-        throw spdlog_ex("fcntl with FD_CLOEXEC failed", errno);
-    }
-#endif
-}
+void prevent_child_fd(FILE *f);
 
 // fopen_s on non windows for writing
-inline bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode)
-{
-#ifdef _WIN32
-#ifdef SPDLOG_WCHAR_FILENAMES
-    *fp = _wfsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
-#else
-    *fp = _fsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
-#endif
-#else // unix
-    *fp = fopen((filename.c_str()), mode.c_str());
-#endif
+bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode);
 
-#ifdef SPDLOG_PREVENT_CHILD_FD
-    if (*fp != nullptr)
-    {
-        prevent_child_fd(*fp);
-    }
-#endif
-    return *fp == nullptr;
-}
+// Remove filename. return 0 on success
+int remove(const filename_t &filename) SPDLOG_NOEXCEPT;
 
-inline int remove(const filename_t &filename)
-{
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-    return _wremove(filename.c_str());
-#else
-    return std::remove(filename.c_str());
-#endif
-}
+// Remove file if exists. return 0 on success
+// Note: Non atomic (might return failure to delete if concurrently deleted by other process/thread)
+int remove_if_exists(const filename_t &filename) SPDLOG_NOEXCEPT;
 
-inline int rename(const filename_t &filename1, const filename_t &filename2)
-{
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-    return _wrename(filename1.c_str(), filename2.c_str());
-#else
-    return std::rename(filename1.c_str(), filename2.c_str());
-#endif
-}
+int rename(const filename_t &filename1, const filename_t &filename2) SPDLOG_NOEXCEPT;
 
-// Return if file exists
-inline bool file_exists(const filename_t &filename)
-{
-#ifdef _WIN32
-#ifdef SPDLOG_WCHAR_FILENAMES
-    auto attribs = GetFileAttributesW(filename.c_str());
-#else
-    auto attribs = GetFileAttributesA(filename.c_str());
-#endif
-    return (attribs != INVALID_FILE_ATTRIBUTES && !(attribs & FILE_ATTRIBUTE_DIRECTORY));
-#else // common linux/unix all have the stat system call
-    struct stat buffer;
-    return (stat(filename.c_str(), &buffer) == 0);
-#endif
-}
+// Return if file exists.
+bool file_exists(const filename_t &filename) SPDLOG_NOEXCEPT;
 
 // Return file size according to open FILE* object
-inline size_t filesize(FILE *f)
-{
-    if (f == nullptr)
-    {
-        throw spdlog_ex("Failed getting file size. fd is null");
-    }
-#if defined(_WIN32) && !defined(__CYGWIN__)
-    int fd = _fileno(f);
-#if _WIN64 // 64 bits
-    struct _stat64 st;
-    if (_fstat64(fd, &st) == 0)
-    {
-        return st.st_size;
-    }
-
-#else // windows 32 bits
-    long ret = _filelength(fd);
-    if (ret >= 0)
-    {
-        return static_cast<size_t>(ret);
-    }
-#endif
-
-#else // unix
-    int fd = fileno(f);
-    // 64 bits(but not in osx or cygwin, where fstat64 is deprecated)
-#if !defined(__FreeBSD__) && !defined(__APPLE__) && (defined(__x86_64__) || defined(__ppc64__)) && !defined(__CYGWIN__)
-    struct stat64 st;
-    if (fstat64(fd, &st) == 0)
-    {
-        return static_cast<size_t>(st.st_size);
-    }
-#else // unix 32 bits or cygwin
-    struct stat st;
-
-    if (fstat(fd, &st) == 0)
-    {
-        return static_cast<size_t>(st.st_size);
-    }
-#endif
-#endif
-    throw spdlog_ex("Failed getting file size from fd", errno);
-}
+size_t filesize(FILE *f);
 
 // Return utc offset in minutes or throw spdlog_ex on failure
-inline int utc_minutes_offset(const std::tm &tm = details::os::localtime())
-{
-
-#ifdef _WIN32
-#if _WIN32_WINNT < _WIN32_WINNT_WS08
-    TIME_ZONE_INFORMATION tzinfo;
-    auto rv = GetTimeZoneInformation(&tzinfo);
-#else
-    DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
-    auto rv = GetDynamicTimeZoneInformation(&tzinfo);
-#endif
-    if (rv == TIME_ZONE_ID_INVALID)
-        throw spdlog::spdlog_ex("Failed getting timezone info. ", errno);
-
-    int offset = -tzinfo.Bias;
-    if (tm.tm_isdst)
-    {
-        offset -= tzinfo.DaylightBias;
-    }
-    else
-    {
-        offset -= tzinfo.StandardBias;
-    }
-    return offset;
-#else
-
-#if defined(sun) || defined(__sun)
-    // 'tm_gmtoff' field is BSD extension and it's missing on SunOS/Solaris
-    struct helper
-    {
-        static long int calculate_gmt_offset(const std::tm &localtm = details::os::localtime(), const std::tm &gmtm = details::os::gmtime())
-        {
-            int local_year = localtm.tm_year + (1900 - 1);
-            int gmt_year = gmtm.tm_year + (1900 - 1);
-
-            long int days = (
-                // difference in day of year
-                localtm.tm_yday -
-                gmtm.tm_yday
-
-                // + intervening leap days
-                + ((local_year >> 2) - (gmt_year >> 2)) - (local_year / 100 - gmt_year / 100) +
-                ((local_year / 100 >> 2) - (gmt_year / 100 >> 2))
-
-                // + difference in years * 365 */
-                + (long int)(local_year - gmt_year) * 365);
-
-            long int hours = (24 * days) + (localtm.tm_hour - gmtm.tm_hour);
-            long int mins = (60 * hours) + (localtm.tm_min - gmtm.tm_min);
-            long int secs = (60 * mins) + (localtm.tm_sec - gmtm.tm_sec);
-
-            return secs;
-        }
-    };
-
-    auto offset_seconds = helper::calculate_gmt_offset(tm);
-#else
-    auto offset_seconds = tm.tm_gmtoff;
-#endif
-
-    return static_cast<int>(offset_seconds / 60);
-#endif
-}
+int utc_minutes_offset(const std::tm &tm = details::os::localtime());
 
 // Return current thread id as size_t
-// It exists because the std::this_thread::get_id() is much slower(especially under VS 2013)
-inline size_t _thread_id()
-{
-#ifdef _WIN32
-    return static_cast<size_t>(::GetCurrentThreadId());
-#elif __linux__
-#if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
-#define SYS_gettid __NR_gettid
-#endif
-    return static_cast<size_t>(syscall(SYS_gettid));
-#elif __FreeBSD__
-    long tid;
-    thr_self(&tid);
-    return static_cast<size_t>(tid);
-#elif __APPLE__
-    uint64_t tid;
-    pthread_threadid_np(nullptr, &tid);
-    return static_cast<size_t>(tid);
-#else // Default to standard C++11 (other Unix)
-    return static_cast<size_t>(std::hash<std::thread::id>()(std::this_thread::get_id()));
-#endif
-}
+// It exists because the std::this_thread::get_id() is much slower(especially
+// under VS 2013)
+size_t _thread_id() SPDLOG_NOEXCEPT;
 
 // Return current thread id as size_t (from thread local storage)
-inline size_t thread_id()
-{
-#if defined(SPDLOG_DISABLE_TID_CACHING) || (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__cplusplus_winrt) ||                       \
-    (defined(__clang__) && !__has_feature(cxx_thread_local))
-    return _thread_id();
-#else // cache thread id in tls
-    static thread_local const size_t tid = _thread_id();
-    return tid;
-#endif
-}
+size_t thread_id() SPDLOG_NOEXCEPT;
 
 // This is avoid msvc issue in sleep_for that happens if the clock changes.
 // See https://github.com/gabime/spdlog/issues/609
-inline void sleep_for_millis(int milliseconds)
-{
-#if defined(_WIN32)
-    ::Sleep(milliseconds);
-#else
-    std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds));
-#endif
-}
+void sleep_for_millis(int milliseconds) SPDLOG_NOEXCEPT;
 
-// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-#define SPDLOG_FILENAME_T(s) L##s
-inline std::string filename_to_str(const filename_t &filename)
-{
-    std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> c;
-    return c.to_bytes(filename);
-}
-#else
-#define SPDLOG_FILENAME_T(s) s
-inline std::string filename_to_str(const filename_t &filename)
-{
-    return filename;
-}
-#endif
+std::string filename_to_str(const filename_t &filename);
 
-inline std::string errno_to_string(char[256], char *res)
-{
-    return std::string(res);
-}
-
-inline std::string errno_to_string(char buf[256], int res)
-{
-    if (res == 0)
-    {
-        return std::string(buf);
-    }
-    return "Unknown error";
-}
-
-// Return errno string (thread safe)
-inline std::string errno_str(int err_num)
-{
-    char buf[256];
-    SPDLOG_CONSTEXPR auto buf_size = sizeof(buf);
-
-#ifdef _WIN32
-    if (strerror_s(buf, buf_size, err_num) == 0)
-    {
-        return std::string(buf);
-    }
-    else
-    {
-        return "Unknown error";
-    }
-
-#elif defined(__FreeBSD__) || defined(__APPLE__) || defined(ANDROID) || defined(__SUNPRO_CC) ||                                            \
-    ((_POSIX_C_SOURCE >= 200112L) && !defined(_GNU_SOURCE)) // posix version
-
-    if (strerror_r(err_num, buf, buf_size) == 0)
-    {
-        return std::string(buf);
-    }
-    else
-    {
-        return "Unknown error";
-    }
-
-#else // gnu version (might not use the given buf, so its retval pointer must be used)
-    auto err = strerror_r(err_num, buf, buf_size); // let compiler choose type
-    return errno_to_string(buf, err);              // use overloading to select correct stringify function
-#endif
-}
-
-inline int pid()
-{
-
-#ifdef _WIN32
-    return static_cast<int>(::GetCurrentProcessId());
-#else
-    return static_cast<int>(::getpid());
-#endif
-}
+int pid() SPDLOG_NOEXCEPT;
 
 // Determine if the terminal supports colors
 // Source: https://github.com/agauniyal/rang/
-inline bool is_color_terminal()
-{
-#ifdef _WIN32
-    return true;
-#else
-    static constexpr const char *Terms[] = {
-        "ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux", "msys", "putty", "rxvt", "screen", "vt100", "xterm"};
-
-    const char *env_p = std::getenv("TERM");
-    if (env_p == nullptr)
-    {
-        return false;
-    }
-
-    static const bool result =
-        std::any_of(std::begin(Terms), std::end(Terms), [&](const char *term) { return std::strstr(env_p, term) != nullptr; });
-    return result;
-#endif
-}
+bool is_color_terminal() SPDLOG_NOEXCEPT;
 
 // Detrmine if the terminal attached
 // Source: https://github.com/agauniyal/rang/
-inline bool in_terminal(FILE *file)
-{
+bool in_terminal(FILE *file) SPDLOG_NOEXCEPT;
 
-#ifdef _WIN32
-    return _isatty(_fileno(file)) != 0;
-#else
-    return isatty(fileno(file)) != 0;
+#if (defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)) && defined(_WIN32)
+void wstr_to_utf8buf(wstring_view_t wstr, memory_buf_t &target);
 #endif
-}
+
 } // namespace os
 } // namespace details
 } // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "os-inl.h"
+#endif

include/spdlog/details/pattern_formatter.h

@@ -0,0 +1,99 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include "spdlog/common.h"
+#include "spdlog/details/log_msg.h"
+#include "spdlog/details/os.h"
+#include "spdlog/formatter.h"
+
+#include <chrono>
+#include <ctime>
+#include <memory>
+
+#include <string>
+#include <vector>
+
+namespace spdlog {
+namespace details {
+
+// padding information.
+struct padding_info
+{
+    enum pad_side
+    {
+        left,
+        right,
+        center
+    };
+
+    padding_info() = default;
+    padding_info(size_t width, padding_info::pad_side side)
+        : width_(width)
+        , side_(side)
+    {}
+
+    bool enabled() const
+    {
+        return width_ != 0;
+    }
+    const size_t width_ = 0;
+    const pad_side side_ = left;
+};
+
+class flag_formatter
+{
+public:
+    explicit flag_formatter(padding_info padinfo)
+        : padinfo_(padinfo)
+    {}
+    flag_formatter() = default;
+    virtual ~flag_formatter() = default;
+    virtual void format(const details::log_msg &msg, const std::tm &tm_time, memory_buf_t &dest) = 0;
+
+protected:
+    padding_info padinfo_;
+};
+
+} // namespace details
+
+class pattern_formatter final : public formatter
+{
+public:
+    explicit pattern_formatter(
+        std::string pattern, pattern_time_type time_type = pattern_time_type::local, std::string eol = spdlog::details::os::default_eol);
+
+    // use default pattern is not given
+    explicit pattern_formatter(pattern_time_type time_type = pattern_time_type::local, std::string eol = spdlog::details::os::default_eol);
+
+    pattern_formatter(const pattern_formatter &other) = delete;
+    pattern_formatter &operator=(const pattern_formatter &other) = delete;
+
+    std::unique_ptr<formatter> clone() const override;
+    void format(const details::log_msg &msg, memory_buf_t &dest) override;
+
+private:
+    std::string pattern_;
+    std::string eol_;
+    pattern_time_type pattern_time_type_;
+    std::tm cached_tm_;
+    std::chrono::seconds last_log_secs_;
+    std::vector<std::unique_ptr<details::flag_formatter>> formatters_;
+
+    std::tm get_time_(const details::log_msg &msg);
+    template<typename Padder>
+    void handle_flag_(char flag, details::padding_info padding);
+
+    // Extract given pad spec (e.g. %8X)
+    // Advance the given it pass the end of the padding spec found (if any)
+    // Return padding.
+    details::padding_info handle_padspec_(std::string::const_iterator &it, std::string::const_iterator end);
+
+    void compile_pattern_(const std::string &pattern);
+};
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "pattern_formatter-inl.h"
+#endif

include/spdlog/details/pattern_formatter_impl.h

@@ -1,707 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-#include "../details/log_msg.h"
-#include "../details/os.h"
-#include "../fmt/fmt.h"
-#include "../formatter.h"
-
-#include <array>
-#include <chrono>
-#include <ctime>
-#include <memory>
-#include <mutex>
-#include <string>
-#include <thread>
-#include <utility>
-#include <vector>
-
-namespace spdlog {
-namespace details {
-class flag_formatter
-{
-public:
-    virtual ~flag_formatter() = default;
-    virtual void format(details::log_msg &msg, const std::tm &tm_time) = 0;
-};
-
-///////////////////////////////////////////////////////////////////////
-// name & level pattern appenders
-///////////////////////////////////////////////////////////////////////
-class name_formatter : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << *msg.logger_name;
-    }
-};
-
-// log level appender
-class level_formatter : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << level::to_str(msg.level);
-    }
-};
-
-// short log level appender
-class short_level_formatter : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << level::to_short_str(msg.level);
-    }
-};
-
-///////////////////////////////////////////////////////////////////////
-// Date time pattern appenders
-///////////////////////////////////////////////////////////////////////
-
-static const char *ampm(const tm &t)
-{
-    return t.tm_hour >= 12 ? "PM" : "AM";
-}
-
-static int to12h(const tm &t)
-{
-    return t.tm_hour > 12 ? t.tm_hour - 12 : t.tm_hour;
-}
-
-// Abbreviated weekday name
-static const std::string days[]{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
-class a_formatter : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << days[tm_time.tm_wday];
-    }
-};
-
-// Full weekday name
-static const std::string full_days[]{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
-class A_formatter : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << full_days[tm_time.tm_wday];
-    }
-};
-
-// Abbreviated month
-static const std::string months[]{"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"};
-class b_formatter : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << months[tm_time.tm_mon];
-    }
-};
-
-// Full month name
-static const std::string full_months[]{
-    "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
-class B_formatter : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << full_months[tm_time.tm_mon];
-    }
-};
-
-// write 2 ints separated by sep with padding of 2
-static fmt::MemoryWriter &pad_n_join(fmt::MemoryWriter &w, int v1, int v2, char sep)
-{
-    w << fmt::pad(v1, 2, '0') << sep << fmt::pad(v2, 2, '0');
-    return w;
-}
-
-// write 3 ints separated by sep with padding of 2
-static fmt::MemoryWriter &pad_n_join(fmt::MemoryWriter &w, int v1, int v2, int v3, char sep)
-{
-    w << fmt::pad(v1, 2, '0') << sep << fmt::pad(v2, 2, '0') << sep << fmt::pad(v3, 2, '0');
-    return w;
-}
-
-// Date and time representation (Thu Aug 23 15:35:46 2014)
-class c_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << days[tm_time.tm_wday] << ' ' << months[tm_time.tm_mon] << ' ' << tm_time.tm_mday << ' ';
-        pad_n_join(msg.formatted, tm_time.tm_hour, tm_time.tm_min, tm_time.tm_sec, ':') << ' ' << tm_time.tm_year + 1900;
-    }
-};
-
-// year - 2 digit
-class C_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << fmt::pad(tm_time.tm_year % 100, 2, '0');
-    }
-};
-
-// Short MM/DD/YY date, equivalent to %m/%d/%y 08/23/01
-class D_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        pad_n_join(msg.formatted, tm_time.tm_mon + 1, tm_time.tm_mday, tm_time.tm_year % 100, '/');
-    }
-};
-
-// year - 4 digit
-class Y_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << tm_time.tm_year + 1900;
-    }
-};
-
-// month 1-12
-class m_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << fmt::pad(tm_time.tm_mon + 1, 2, '0');
-    }
-};
-
-// day of month 1-31
-class d_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << fmt::pad(tm_time.tm_mday, 2, '0');
-    }
-};
-
-// hours in 24 format 0-23
-class H_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << fmt::pad(tm_time.tm_hour, 2, '0');
-    }
-};
-
-// hours in 12 format 1-12
-class I_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << fmt::pad(to12h(tm_time), 2, '0');
-    }
-};
-
-// minutes 0-59
-class M_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << fmt::pad(tm_time.tm_min, 2, '0');
-    }
-};
-
-// seconds 0-59
-class S_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << fmt::pad(tm_time.tm_sec, 2, '0');
-    }
-};
-
-// milliseconds
-class e_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        auto duration = msg.time.time_since_epoch();
-        auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count() % 1000;
-        msg.formatted << fmt::pad(static_cast<int>(millis), 3, '0');
-    }
-};
-
-// microseconds
-class f_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        auto duration = msg.time.time_since_epoch();
-        auto micros = std::chrono::duration_cast<std::chrono::microseconds>(duration).count() % 1000000;
-        msg.formatted << fmt::pad(static_cast<int>(micros), 6, '0');
-    }
-};
-
-// nanoseconds
-class F_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        auto duration = msg.time.time_since_epoch();
-        auto ns = std::chrono::duration_cast<std::chrono::nanoseconds>(duration).count() % 1000000000;
-        msg.formatted << fmt::pad(static_cast<int>(ns), 9, '0');
-    }
-};
-
-class E_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        auto duration = msg.time.time_since_epoch();
-        auto seconds = std::chrono::duration_cast<std::chrono::seconds>(duration).count();
-        msg.formatted << seconds;
-    }
-};
-
-// AM/PM
-class p_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        msg.formatted << ampm(tm_time);
-    }
-};
-
-// 12 hour clock 02:55:02 pm
-class r_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        pad_n_join(msg.formatted, to12h(tm_time), tm_time.tm_min, tm_time.tm_sec, ':') << ' ' << ampm(tm_time);
-    }
-};
-
-// 24-hour HH:MM time, equivalent to %H:%M
-class R_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        pad_n_join(msg.formatted, tm_time.tm_hour, tm_time.tm_min, ':');
-    }
-};
-
-// ISO 8601 time format (HH:MM:SS), equivalent to %H:%M:%S
-class T_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-        pad_n_join(msg.formatted, tm_time.tm_hour, tm_time.tm_min, tm_time.tm_sec, ':');
-    }
-};
-
-// ISO 8601 offset from UTC in timezone (+-HH:MM)
-class z_formatter SPDLOG_FINAL : public flag_formatter
-{
-public:
-    const std::chrono::seconds cache_refresh = std::chrono::seconds(5);
-
-    z_formatter() = default;
-    z_formatter(const z_formatter &) = delete;
-    z_formatter &operator=(const z_formatter &) = delete;
-
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-#ifdef _WIN32
-        int total_minutes = get_cached_offset(msg, tm_time);
-#else
-        // No need to chache under gcc,
-        // it is very fast (already stored in tm.tm_gmtoff)
-        int total_minutes = os::utc_minutes_offset(tm_time);
-#endif
-        bool is_negative = total_minutes < 0;
-        char sign;
-        if (is_negative)
-        {
-            total_minutes = -total_minutes;
-            sign = '-';
-        }
-        else
-        {
-            sign = '+';
-        }
-
-        int h = total_minutes / 60;
-        int m = total_minutes % 60;
-        msg.formatted << sign;
-        pad_n_join(msg.formatted, h, m, ':');
-    }
-
-private:
-    log_clock::time_point _last_update{std::chrono::seconds(0)};
-    int _offset_minutes{0};
-    std::mutex _mutex;
-
-    int get_cached_offset(const log_msg &msg, const std::tm &tm_time)
-    {
-        std::lock_guard<std::mutex> l(_mutex);
-        if (msg.time - _last_update >= cache_refresh)
-        {
-            _offset_minutes = os::utc_minutes_offset(tm_time);
-            _last_update = msg.time;
-        }
-        return _offset_minutes;
-    }
-};
-
-// Thread id
-class t_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << msg.thread_id;
-    }
-};
-
-// Current pid
-class pid_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << details::os::pid();
-    }
-};
-
-// message counter formatter
-class i_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << fmt::pad(msg.msg_id, 6, '0');
-    }
-};
-
-class v_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << fmt::StringRef(msg.raw.data(), msg.raw.size());
-    }
-};
-
-class ch_formatter SPDLOG_FINAL : public flag_formatter
-{
-public:
-    explicit ch_formatter(char ch)
-        : _ch(ch)
-    {
-    }
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << _ch;
-    }
-
-private:
-    char _ch;
-};
-
-// aggregate user chars to display as is
-class aggregate_formatter SPDLOG_FINAL : public flag_formatter
-{
-public:
-    aggregate_formatter() = default;
-
-    void add_ch(char ch)
-    {
-        _str += ch;
-    }
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.formatted << _str;
-    }
-
-private:
-    std::string _str;
-};
-
-// mark the color range. expect it to be in the form of "%^colored text%$"
-class color_start_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.color_range_start = msg.formatted.size();
-    }
-};
-class color_stop_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &) override
-    {
-        msg.color_range_end = msg.formatted.size();
-    }
-};
-
-// Full info formatter
-// pattern: [%Y-%m-%d %H:%M:%S.%e] [%n] [%l] %v
-class full_formatter SPDLOG_FINAL : public flag_formatter
-{
-    void format(details::log_msg &msg, const std::tm &tm_time) override
-    {
-#ifndef SPDLOG_NO_DATETIME
-        auto duration = msg.time.time_since_epoch();
-        auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count() % 1000;
-
-        /* Slower version(while still very fast - about 3.2 million lines/sec under 10 threads),
-        msg.formatted.write("[{:d}-{:02d}-{:02d} {:02d}:{:02d}:{:02d}.{:03d}] [{}] [{}] {} ",
-        tm_time.tm_year + 1900,
-        tm_time.tm_mon + 1,
-        tm_time.tm_mday,
-        tm_time.tm_hour,
-        tm_time.tm_min,
-        tm_time.tm_sec,
-        static_cast<int>(millis),
-        msg.logger_name,
-        level::to_str(msg.level),
-        msg.raw.str());*/
-
-        // Faster (albeit uglier) way to format the line (5.6 million lines/sec under 10 threads)
-        msg.formatted << '[' << static_cast<unsigned int>(tm_time.tm_year + 1900) << '-'
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_mon + 1), 2, '0') << '-'
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_mday), 2, '0') << ' '
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_hour), 2, '0') << ':'
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_min), 2, '0') << ':'
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_sec), 2, '0') << '.'
-                      << fmt::pad(static_cast<unsigned int>(millis), 3, '0') << "] ";
-
-        // no datetime needed
-#else
-        (void)tm_time;
-#endif
-
-#ifndef SPDLOG_NO_NAME
-        msg.formatted << '[' << *msg.logger_name << "] ";
-#endif
-
-        msg.formatted << '[';
-        // wrap the level name with color
-        msg.color_range_start = msg.formatted.size();
-        msg.formatted << level::to_str(msg.level);
-        msg.color_range_end = msg.formatted.size();
-        msg.formatted << "] " << fmt::StringRef(msg.raw.data(), msg.raw.size());
-    }
-};
-
-} // namespace details
-} // namespace spdlog
-///////////////////////////////////////////////////////////////////////////////
-// pattern_formatter inline impl
-///////////////////////////////////////////////////////////////////////////////
-inline spdlog::pattern_formatter::pattern_formatter(const std::string &pattern, pattern_time_type pattern_time, std::string eol)
-    : _eol(std::move(eol))
-    , _pattern_time(pattern_time)
-{
-    compile_pattern(pattern);
-}
-
-inline void spdlog::pattern_formatter::compile_pattern(const std::string &pattern)
-{
-    auto end = pattern.end();
-    std::unique_ptr<details::aggregate_formatter> user_chars;
-    for (auto it = pattern.begin(); it != end; ++it)
-    {
-        if (*it == '%')
-        {
-            if (user_chars) // append user chars found so far
-            {
-                _formatters.push_back(std::move(user_chars));
-            }
-            // if(
-            if (++it != end)
-            {
-                handle_flag(*it);
-            }
-            else
-            {
-                break;
-            }
-        }
-        else // chars not following the % sign should be displayed as is
-        {
-            if (!user_chars)
-            {
-                user_chars = std::unique_ptr<details::aggregate_formatter>(new details::aggregate_formatter());
-            }
-            user_chars->add_ch(*it);
-        }
-    }
-    if (user_chars) // append raw chars found so far
-    {
-        _formatters.push_back(std::move(user_chars));
-    }
-}
-inline void spdlog::pattern_formatter::handle_flag(char flag)
-{
-    switch (flag)
-    {
-    // logger name
-    case 'n':
-        _formatters.emplace_back(new details::name_formatter());
-        break;
-
-    case 'l':
-        _formatters.emplace_back(new details::level_formatter());
-        break;
-
-    case 'L':
-        _formatters.emplace_back(new details::short_level_formatter());
-        break;
-
-    case ('t'):
-        _formatters.emplace_back(new details::t_formatter());
-        break;
-
-    case ('v'):
-        _formatters.emplace_back(new details::v_formatter());
-        break;
-
-    case ('a'):
-        _formatters.emplace_back(new details::a_formatter());
-        break;
-
-    case ('A'):
-        _formatters.emplace_back(new details::A_formatter());
-        break;
-
-    case ('b'):
-    case ('h'):
-        _formatters.emplace_back(new details::b_formatter());
-        break;
-
-    case ('B'):
-        _formatters.emplace_back(new details::B_formatter());
-        break;
-    case ('c'):
-        _formatters.emplace_back(new details::c_formatter());
-        break;
-
-    case ('C'):
-        _formatters.emplace_back(new details::C_formatter());
-        break;
-
-    case ('Y'):
-        _formatters.emplace_back(new details::Y_formatter());
-        break;
-
-    case ('D'):
-    case ('x'):
-
-        _formatters.emplace_back(new details::D_formatter());
-        break;
-
-    case ('m'):
-        _formatters.emplace_back(new details::m_formatter());
-        break;
-
-    case ('d'):
-        _formatters.emplace_back(new details::d_formatter());
-        break;
-
-    case ('H'):
-        _formatters.emplace_back(new details::H_formatter());
-        break;
-
-    case ('I'):
-        _formatters.emplace_back(new details::I_formatter());
-        break;
-
-    case ('M'):
-        _formatters.emplace_back(new details::M_formatter());
-        break;
-
-    case ('S'):
-        _formatters.emplace_back(new details::S_formatter());
-        break;
-
-    case ('e'):
-        _formatters.emplace_back(new details::e_formatter());
-        break;
-
-    case ('f'):
-        _formatters.emplace_back(new details::f_formatter());
-        break;
-    case ('F'):
-        _formatters.emplace_back(new details::F_formatter());
-        break;
-
-    case ('E'):
-        _formatters.emplace_back(new details::E_formatter());
-        break;
-
-    case ('p'):
-        _formatters.emplace_back(new details::p_formatter());
-        break;
-
-    case ('r'):
-        _formatters.emplace_back(new details::r_formatter());
-        break;
-
-    case ('R'):
-        _formatters.emplace_back(new details::R_formatter());
-        break;
-
-    case ('T'):
-    case ('X'):
-        _formatters.emplace_back(new details::T_formatter());
-        break;
-
-    case ('z'):
-        _formatters.emplace_back(new details::z_formatter());
-        break;
-
-    case ('+'):
-        _formatters.emplace_back(new details::full_formatter());
-        break;
-
-    case ('P'):
-        _formatters.emplace_back(new details::pid_formatter());
-        break;
-
-    case ('i'):
-        _formatters.emplace_back(new details::i_formatter());
-        break;
-
-    case ('^'):
-        _formatters.emplace_back(new details::color_start_formatter());
-        break;
-
-    case ('$'):
-        _formatters.emplace_back(new details::color_stop_formatter());
-        break;
-
-    default: // Unknown flag appears as is
-        _formatters.emplace_back(new details::ch_formatter('%'));
-        _formatters.emplace_back(new details::ch_formatter(flag));
-        break;
-    }
-}
-
-inline std::tm spdlog::pattern_formatter::get_time(details::log_msg &msg)
-{
-    if (_pattern_time == pattern_time_type::local)
-    {
-        return details::os::localtime(log_clock::to_time_t(msg.time));
-    }
-    return details::os::gmtime(log_clock::to_time_t(msg.time));
-}
-
-inline void spdlog::pattern_formatter::format(details::log_msg &msg)
-{
-
-#ifndef SPDLOG_NO_DATETIME
-    auto tm_time = get_time(msg);
-#else
-    std::tm tm_time;
-#endif
-    for (auto &f : _formatters)
-    {
-        f->format(msg, tm_time);
-    }
-    // write eol
-    msg.formatted << _eol;
-}

include/spdlog/details/periodic_worker-inl.h

@@ -0,0 +1,49 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include "spdlog/details/periodic_worker.h"
+#endif
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE periodic_worker::periodic_worker(const std::function<void()> &callback_fun, std::chrono::seconds interval)
+{
+    active_ = (interval > std::chrono::seconds::zero());
+    if (!active_)
+    {
+        return;
+    }
+
+    worker_thread_ = std::thread([this, callback_fun, interval]() {
+        for (;;)
+        {
+            std::unique_lock<std::mutex> lock(this->mutex_);
+            if (this->cv_.wait_for(lock, interval, [this] { return !this->active_; }))
+            {
+                return; // active_ == false, so exit this thread
+            }
+            callback_fun();
+        }
+    });
+}
+
+// stop the worker thread and join it
+SPDLOG_INLINE periodic_worker::~periodic_worker()
+{
+    if (worker_thread_.joinable())
+    {
+        {
+            std::lock_guard<std::mutex> lock(mutex_);
+            active_ = false;
+        }
+        cv_.notify_one();
+        worker_thread_.join();
+    }
+}
+
+} // namespace details
+} // namespace spdlog