1. renamed lib to to spitlog

2. Rotating bugfix

include/spitlog/sinks/base_sink.h

@@ -0,0 +1,43 @@
+#pragma once
+//
+// base sink templated over a mutex (either dummy or realy)
+// concrete implementation should only overrid the _sink_it method.
+// all locking is taken care of here so no locking needed by the implementors..
+//
+
+#include<string>
+#include<mutex>
+#include<atomic>
+#include "./sink.h"
+#include "../formatter.h"
+#include "../common.h"
+#include "../details/log_msg.h"
+
+
+namespace spitlog
+{
+namespace sinks
+{
+template<class Mutex>
+class base_sink:public sink
+{
+public:
+    base_sink():_mutex() {}
+    virtual ~base_sink() = default;
+
+    base_sink(const base_sink&) = delete;
+    base_sink& operator=(const base_sink&) = delete;
+
+    void log(const details::log_msg& msg) override
+    {
+        std::lock_guard<Mutex> lock(_mutex);
+        _sink_it(msg);
+    };
+
+
+protected:
+    virtual void _sink_it(const details::log_msg& msg) = 0;
+    Mutex _mutex;
+};
+}
+}