Merge pull request #2359 from tiolan/master

Revert "Merge pull request #2352 from tiolan/topic/android_buffer"

INSTALL

@@ -2,9 +2,9 @@ spdlog is header only library.
 Just copy the files to your build tree and use a C++11 compiler
 
 Tested on:
-gcc 4.8.1 and above
-clang 3.5
-Visual Studio 2013
+gcc 4.8.1 or above
+clang 3.5 or above
+Visual Studio 2013 or above
 
 gcc 4.8 flags: --std==c++11 -pthread -O3 -flto -Wl,--no-as-needed
 gcc 4.9 flags: --std=c++11 -pthread -O3 -flto

README.md

@@ -20,7 +20,7 @@ Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.
  
 
 ## Platforms
- * Linux, FreeBSD, Solaris
+ * Linux, FreeBSD, Solaris, AIX
  * Windows (vc 2013+, cygwin)
  * Mac OSX (clang 3.5+)
  * Android

include/spdlog/common.h

@@ -143,11 +143,6 @@ 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:
@@ -158,7 +153,9 @@ public:
 
     spdlog_ex(const std::string &msg, int last_errno)
     {
-        _msg = msg + ": " + details::os::errno_str(last_errno);
+        fmt::MemoryWriter writer;
+        fmt::format_system_error(writer, last_errno, msg);
+        _msg = writer.str();
     }
 
     const char *what() const SPDLOG_NOEXCEPT override
@@ -179,4 +176,13 @@ using filename_t = std::wstring;
 using filename_t = std::string;
 #endif
 
+#define SPDLOG_CATCH_AND_HANDLE                                                                                                            \
+    catch (const std::exception &ex)                                                                                                       \
+    {                                                                                                                                      \
+        _err_handler(ex.what());                                                                                                           \
+    }                                                                                                                                      \
+    catch (...)                                                                                                                            \
+    {                                                                                                                                      \
+        _err_handler("Unknown exeption in logger");                                                                                        \
+    }
 } // namespace spdlog

include/spdlog/contrib/sinks/step_file_sink.h

@@ -18,22 +18,26 @@
 // 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());
+// filename_t &tmp_ext = ".tmp", unsigned max_file_size = std::numeric_limits<unsigned>::max(), bool delete_empty_files = true, const
+// filename_t &file_header = ""); 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)
+//     const std::string &logger_name, const filename_t &filename_fmt, unsigned seconds, const filename_t &tmp_ext, unsigned max_file_size,
+//     bool delete_empty_files, const filename_t &file_header)
 // {
-//     return create<spdlog::sinks::step_file_sink_mt>(logger_name, filename_fmt, seconds, tmp_ext, max_file_size);
+//     return create<spdlog::sinks::step_file_sink_mt>(logger_name, filename_fmt, seconds, tmp_ext, max_file_size, delete_empty_files,
+//     file_header);
 // }
 
 // 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)
+//     const std::string &logger_name, const filename_t &filename_fmt, unsigned seconds, const filename_t &tmp_ext, unsigned max_file_size,
+//     bool delete_empty_files, const filename_t &file_header)
 // {
-//     return create<spdlog::sinks::step_file_sink_st>(logger_name, filename_fmt, seconds, tmp_ext, max_file_size);
+//     return create<spdlog::sinks::step_file_sink_st>(logger_name, filename_fmt, seconds, tmp_ext, max_file_size, delete_empty_files,
+//     file_header);
 // }
 
 namespace spdlog {
@@ -64,17 +68,27 @@ 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)
+    step_file_sink(filename_t base_filename, unsigned step_seconds, filename_t tmp_ext, unsigned max_size, bool delete_empty_files,
+        filename_t file_header)
         : _base_filename(std::move(base_filename))
         , _tmp_ext(std::move(tmp_ext))
         , _step_seconds(step_seconds)
         , _max_size(max_size)
+        , _delete_empty_files(delete_empty_files)
     {
         if (step_seconds == 0)
         {
             throw spdlog_ex("step_file_sink: Invalid time step in ctor");
         }
-        if (max_size == 0)
+
+        if (!file_header.empty())
+        {
+            pattern_formatter formatter_for_file_header("%v");
+            _file_header.raw << file_header;
+            formatter_for_file_header.format(_file_header);
+        }
+
+        if (max_size <= _file_header.formatted.size())
         {
             throw spdlog_ex("step_file_sink: Invalid max log size in ctor");
         }
@@ -89,6 +103,13 @@ public:
 
         _file_helper.open(_current_filename);
         _current_size = _file_helper.size(); // expensive. called only once
+
+        if (!_current_size)
+        {
+            _current_size += _file_header.formatted.size();
+            if (_current_size)
+                _file_helper.write(_file_header);
+        }
     }
 
     ~step_file_sink()
@@ -105,16 +126,34 @@ public:
 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)
+        auto msg_size = msg.formatted.size();
+
+        if (std::chrono::system_clock::now() >= _tp || _current_size + msg_size > _max_size)
+        {
+            filename_t new_filename;
+            std::tie(new_filename, std::ignore) = FileNameCalc::calc_filename(_base_filename, _tmp_ext);
+
+            bool change_occured = !details::file_helper::file_exists(new_filename);
+            if (change_occured)
             {
                 close_current_file();
 
-            std::tie(_current_filename, std::ignore) = FileNameCalc::calc_filename(_base_filename, _tmp_ext);
+                _current_filename = std::move(new_filename);
+
                 _file_helper.open(_current_filename);
-            _tp = _next_tp();
-            _current_size = msg.formatted.size();
             }
+
+            _tp = _next_tp();
+
+            if (change_occured)
+            {
+                _current_size = _file_header.formatted.size();
+                if (_current_size)
+                    _file_helper.write(_file_header);
+            }
+        }
+
+        _current_size += msg_size;
         _file_helper.write(msg);
     }
 
@@ -133,13 +172,25 @@ private:
     {
         using details::os::filename_to_str;
 
-        filename_t src = _current_filename, target;
-        std::tie(target, std::ignore) = details::file_helper::split_by_extenstion(src);
+        // Delete empty files, if required
+        if (_delete_empty_files && _current_size <= _file_header.formatted.size())
+        {
+            if (details::os::remove(_current_filename) != 0)
+            {
+                throw spdlog_ex("step_file_sink: not remove " + filename_to_str(_current_filename), errno);
+            }
+
+            return;
+        }
+
+        filename_t target;
+        std::tie(target, std::ignore) = details::file_helper::split_by_extenstion(_current_filename);
         target += _ext;
 
-        if (details::file_helper::file_exists(src) && details::os::rename(src, target) != 0)
+        if (details::file_helper::file_exists(_current_filename) && details::os::rename(_current_filename, target) != 0)
         {
-            throw spdlog_ex("step_file_sink: failed renaming " + filename_to_str(src) + " to " + filename_to_str(target), errno);
+            throw spdlog_ex(
+                "step_file_sink: failed renaming " + filename_to_str(_current_filename) + " to " + filename_to_str(target), errno);
         }
     }
 
@@ -147,6 +198,7 @@ private:
     const filename_t _tmp_ext;
     const std::chrono::seconds _step_seconds;
     const unsigned _max_size;
+    const bool _delete_empty_files;
 
     std::chrono::system_clock::time_point _tp;
     filename_t _current_filename;
@@ -154,6 +206,7 @@ private:
     unsigned _current_size;
 
     details::file_helper _file_helper;
+    details::log_msg _file_header;
 };
 
 using step_file_sink_mt = step_file_sink<std::mutex>;

include/spdlog/details/async_log_helper.h

@@ -23,7 +23,6 @@
 #include <condition_variable>
 #include <exception>
 #include <functional>
-#include <iostream>
 #include <memory>
 #include <string>
 #include <thread>
@@ -83,7 +82,7 @@ class async_log_helper
         }
 
         // copy into log_msg
-        void fill_log_msg(log_msg &msg, std::string* logger_name)
+        void fill_log_msg(log_msg &msg, std::string *logger_name)
         {
             msg.logger_name = logger_name;
             msg.level = level;
@@ -101,12 +100,8 @@ public:
 
     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,
+    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);
@@ -176,15 +171,9 @@ private:
 ///////////////////////////////////////////////////////////////////////////////
 // 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)
+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))
@@ -251,14 +240,7 @@ inline void spdlog::details::async_log_helper::worker_loop()
         {
             active = process_next_msg();
         }
-        catch (const std::exception &ex)
-        {
-            _err_handler(ex.what());
-        }
-        catch (...)
-        {
-            _err_handler("Unknown exeption in async logger worker loop.");
-        }
+        SPDLOG_CATCH_AND_HANDLE
     }
     if (_worker_teardown_cb)
     {
@@ -295,9 +277,13 @@ inline bool spdlog::details::async_log_helper::process_next_msg()
         for (auto &s : _sinks)
         {
             if (s->should_log(incoming_log_msg.level))
+            {
+                try
                 {
                     s->log(incoming_log_msg);
                 }
+                SPDLOG_CATCH_AND_HANDLE
+            }
         }
         handle_flush_interval();
         return true;
@@ -334,9 +320,14 @@ inline void spdlog::details::async_log_helper::handle_flush_interval()
 // 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)
+    {
+        try
         {
             s->flush();
         }
+        SPDLOG_CATCH_AND_HANDLE
+    }
     _last_flush = os::now();
 }

include/spdlog/details/async_logger_impl.h

@@ -21,8 +21,8 @@ inline spdlog::async_logger::async_logger(const std::string &logger_name, const
     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))
+    , _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))
 {
 }
 

include/spdlog/details/logger_impl.h

@@ -68,15 +68,7 @@ inline void spdlog::logger::log(level::level_enum lvl, const char *fmt, const Ar
 #endif
         _sink_it(log_msg);
     }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception in logger " + _name);
-        throw;
-    }
+    SPDLOG_CATCH_AND_HANDLE
 }
 
 template<typename... Args>
@@ -92,15 +84,7 @@ inline void spdlog::logger::log(level::level_enum lvl, const char *msg)
         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;
-    }
+    SPDLOG_CATCH_AND_HANDLE
 }
 
 template<typename T>
@@ -116,15 +100,7 @@ inline void spdlog::logger::log(level::level_enum lvl, const T &msg)
         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;
-    }
+    SPDLOG_CATCH_AND_HANDLE
 }
 
 template<typename Arg1, typename... Args>
@@ -331,10 +307,14 @@ inline void spdlog::logger::_set_formatter(formatter_ptr msg_formatter)
 
 inline void spdlog::logger::flush()
 {
+    try
+    {
         for (auto &sink : _sinks)
         {
             sink->flush();
         }
+    }
+    SPDLOG_CATCH_AND_HANDLE
 }
 
 inline void spdlog::logger::_default_err_handler(const std::string &msg)

include/spdlog/details/os.h

@@ -237,7 +237,7 @@ inline size_t filesize(FILE *f)
 #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__)
+#if !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__APPLE__) && !defined(__HAIKU__) && (defined(__x86_64__) || defined(__ppc64__)) && !defined(__CYGWIN__)
     struct stat64 st;
     if (fstat64(fd, &st) == 0)
     {
@@ -282,7 +282,7 @@ inline int utc_minutes_offset(const std::tm &tm = details::os::localtime())
     return offset;
 #else
 
-#if defined(sun) || defined(__sun)
+#if defined(sun) || defined(__sun) || defined(_AIX)
     // 'tm_gmtoff' field is BSD extension and it's missing on SunOS/Solaris
     struct helper
     {
@@ -383,54 +383,6 @@ inline std::string filename_to_str(const filename_t &filename)
 }
 #endif
 
-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()
 {
 

include/spdlog/sinks/dist_sink.h

@@ -62,6 +62,12 @@ public:
         std::lock_guard<Mutex> lock(base_sink<Mutex>::_mutex);
         _sinks.erase(std::remove(_sinks.begin(), _sinks.end(), sink), _sinks.end());
     }
+
+    void remove_all_sinks()
+    {
+        std::lock_guard<Mutex> lock(base_sink<Mutex>::_mutex);
+        _sinks.clear();
+    }
 };
 
 using dist_sink_mt = dist_sink<std::mutex>;

include/spdlog/sinks/wincolor_sink.h

@@ -104,7 +104,7 @@ private:
     void _print_range(const details::log_msg &msg, size_t start, size_t end)
     {
         DWORD size = static_cast<DWORD>(end - start);
-        WriteConsoleA(out_handle_, msg.formatted.data() + start, size, nullptr, nullptr);
+        WriteFile(out_handle_, msg.formatted.data() + start, size, nullptr, nullptr);
     }
 };
 

tests/errors.cpp

@@ -7,14 +7,17 @@
 
 class failing_sink : public spdlog::sinks::sink
 {
-    void log(const spdlog::details::log_msg &msg) override
+    void log(const spdlog::details::log_msg &) override
     {
         throw std::runtime_error("some error happened during log");
     }
 
-    void flush() override {}
+    void flush() override
+    {
+        throw std::runtime_error("some error happened during flush");
+    }
 };
-
+using namespace std;
 TEST_CASE("default_error_handler", "[errors]]")
 {
     prepare_logdir();
@@ -44,7 +47,7 @@ TEST_CASE("custom_error_handler", "[errors]]")
     std::string filename = "logs/simple_log.txt";
     auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("logger", filename, true);
     logger->flush_on(spdlog::level::info);
-    logger->set_error_handler([=](const std::string &msg) { throw custom_ex(); });
+    logger->set_error_handler([=](const std::string &) { throw custom_ex(); });
     logger->info("Good message #1");
 #if !defined(SPDLOG_FMT_PRINTF)
     REQUIRE_THROWS_AS(logger->info("Bad format msg {} {}", "xxx"), custom_ex);
@@ -57,12 +60,19 @@ TEST_CASE("custom_error_handler", "[errors]]")
 
 TEST_CASE("default_error_handler2", "[errors]]")
 {
-
     auto logger = spdlog::create<failing_sink>("failed_logger");
-    logger->set_error_handler([=](const std::string &msg) { throw custom_ex(); });
+    logger->set_error_handler([=](const std::string &) { throw custom_ex(); });
     REQUIRE_THROWS_AS(logger->info("Some message"), custom_ex);
 }
 
+TEST_CASE("flush_error_handler", "[errors]]")
+{
+    spdlog::drop_all();
+    auto logger = spdlog::create<failing_sink>("failed_logger");
+    logger->set_error_handler([=](const std::string &) { throw custom_ex(); });
+    REQUIRE_THROWS_AS(logger->flush(), custom_ex);
+}
+
 TEST_CASE("async_error_handler", "[errors]]")
 {
     prepare_logdir();
@@ -71,7 +81,7 @@ TEST_CASE("async_error_handler", "[errors]]")
     std::string filename = "logs/simple_async_log.txt";
     {
         auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("logger", filename, true);
-        logger->set_error_handler([=](const std::string &msg) {
+        logger->set_error_handler([=](const std::string &) {
             std::ofstream ofs("logs/custom_err.txt");
             if (!ofs)
                 throw std::runtime_error("Failed open logs/custom_err.txt");
@@ -99,7 +109,7 @@ TEST_CASE("async_error_handler2", "[errors]]")
     spdlog::set_async_mode(128);
     {
         auto logger = spdlog::create<failing_sink>("failed_logger");
-        logger->set_error_handler([=](const std::string &msg) {
+        logger->set_error_handler([=](const std::string &) {
             std::ofstream ofs("logs/custom_err2.txt");
             if (!ofs)
                 throw std::runtime_error("Failed open logs/custom_err2.txt");
@@ -108,6 +118,7 @@ TEST_CASE("async_error_handler2", "[errors]]")
         logger->info("Hello failure");
         spdlog::drop("failed_logger"); // force logger to drain the queue and shutdown
         spdlog::set_sync_mode();
+        logger.reset();
     }
 
     REQUIRE(file_contents("logs/custom_err2.txt") == err_msg);

tests/file_log.cpp

@@ -50,7 +50,7 @@ TEST_CASE("flush_on", "[flush_on]]")
 TEST_CASE("rotating_file_logger1", "[rotating_logger]]")
 {
     prepare_logdir();
-    std::string basename = "logs/rotating_log";
+    std::string basename = "logs/rotating_log_A";
     auto logger = spdlog::rotating_logger_mt("logger", basename, 1024, 0);
 
     for (int i = 0; i < 10; ++i)
@@ -70,8 +70,9 @@ TEST_CASE("rotating_file_logger1", "[rotating_logger]]")
 TEST_CASE("rotating_file_logger2", "[rotating_logger]]")
 {
     prepare_logdir();
-    std::string basename = "logs/rotating_log";
-    auto logger = spdlog::rotating_logger_mt("logger", basename, 1024, 1);
+    size_t max_size = 10 * 1024;
+    std::string basename = "logs/rotating_log.txt";
+    auto logger = spdlog::rotating_logger_mt("logger", basename, max_size, 1);
     for (int i = 0; i < 10; ++i)
         logger->info("Test message {}", i);
 
@@ -88,9 +89,9 @@ TEST_CASE("rotating_file_logger2", "[rotating_logger]]")
     }
 
     logger->flush();
-    REQUIRE(get_filesize(filename) <= 1024);
-    auto filename1 = basename + ".1";
-    REQUIRE(get_filesize(filename1) <= 1024);
+    REQUIRE(get_filesize(filename) <= max_size);
+    auto filename1 = "logs/rotating_log.1.txt";
+    REQUIRE(get_filesize(filename1) <= max_size);
 }
 
 TEST_CASE("daily_logger", "[daily_logger]]")

tests/test_async.cpp

@@ -21,7 +21,7 @@ TEST_CASE("basic async test ", "[async]")
     auto test_sink = std::make_shared<spdlog::sinks::test_sink_mt>();
     size_t queue_size = 128;
     size_t messages = 256;
-    auto logger = spdlog::create_async("as", test_sink, 128, spdlog::async_overflow_policy::block_retry);
+    auto logger = spdlog::create_async("as", test_sink, queue_size, spdlog::async_overflow_policy::block_retry);
     for (size_t i = 0; i < messages; i++)
     {
         logger->info("Hello message #{}", i);

tests/tests.sln

@@ -1,10 +1,83 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2015
-VisualStudioVersion = 14.0
+# Visual Studio 15
+VisualStudioVersion = 15.0.27428.2037
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "tests", "tests.vcxproj", "{59A07559-5F38-4DD6-A7FA-DB4153690B42}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "spdlog", "spdlog", "{7EFD7EC9-512F-4B35-ADFE-49863B2C04A5}"
+	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", "{AAD3C108-4E24-4AA8-BA09-4C9A75A881B3}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\contrib\README.md = ..\include\spdlog\contrib\README.md
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sinks", "sinks", "{3FB7E4DF-2397-463E-BDAD-32854AB66DFD}"
+	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", "{97DED9BF-821E-4A7A-8D13-ED9A739E1F55}"
+	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", "{0B649723-CF78-47C0-B1CA-1F173DDBFED4}"
+	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", "{1FBA69C4-7EAA-4D60-BCF9-3D59D5A88D32}"
+	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", "{278CDF3C-6E6D-4FAF-AF79-C1806101B4CB}"
+	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
@@ -25,4 +98,15 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{AAD3C108-4E24-4AA8-BA09-4C9A75A881B3} = {7EFD7EC9-512F-4B35-ADFE-49863B2C04A5}
+		{3FB7E4DF-2397-463E-BDAD-32854AB66DFD} = {AAD3C108-4E24-4AA8-BA09-4C9A75A881B3}
+		{97DED9BF-821E-4A7A-8D13-ED9A739E1F55} = {7EFD7EC9-512F-4B35-ADFE-49863B2C04A5}
+		{0B649723-CF78-47C0-B1CA-1F173DDBFED4} = {7EFD7EC9-512F-4B35-ADFE-49863B2C04A5}
+		{1FBA69C4-7EAA-4D60-BCF9-3D59D5A88D32} = {0B649723-CF78-47C0-B1CA-1F173DDBFED4}
+		{278CDF3C-6E6D-4FAF-AF79-C1806101B4CB} = {7EFD7EC9-512F-4B35-ADFE-49863B2C04A5}
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {25A6A4D3-9B25-4071-81B4-99DFDD066255}
+	EndGlobalSection
 EndGlobal

tests/tests.vcxproj.filters

@@ -30,9 +30,6 @@
     <ClCompile Include="utils.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="errors.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
     <ClCompile Include="test_macros.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
@@ -42,6 +39,9 @@
     <ClCompile Include="test_misc.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="errors.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="test_async.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>