logger.h

/**  
 * 日志类头文件, Logger.h 
 * zhangyl 2017.02.28 
 **/  

#ifndef __LOGGER_H__  
#define __LOGGER_H__  

#include <string>  
 #include <memory>  
 #include <thread>  
 #include <mutex>  
 #include <condition_variable>  
 #include <list>  
 
 //struct FILE;  

 class Logger  
 {  
 public:  
     static Logger& GetInstance();  
 
     void SetFileName(const char* filename);  
     bool Start();  
     void Stop();  
 
     void AddToQueue(const char* pszLevel,
                     const char* pszFile,
                     int lineNo,
                     const char* pszFuncSig,
                     char* pszFmt, ...);  
 
 private:  
     Logger() = default;  
     Logger(const Logger& rhs) = delete;  
     Logger& operator =(Logger& rhs) = delete;  
 
     void threadfunc();  
 
 
 private:  
     std::string                     filename_;  
     FILE*                           fp_{};  
     std::shared_ptr<std::thread>    spthread_;  
     std::mutex                      mutex_;  
     std::condition_variable         cv_;
             //有新的日志到来的标识  
     bool                            exit_{false};  
     std::list<std::string>          queue_;  
 };  

 #define LogInfo(...) \
      Logger::GetInstance().AddToQueue("INFO", __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__)
 #define LogWarning(...) \
      Logger::GetInstance().AddToQueue("WARNING", __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__)
 #define LogError(...) \
      Logger::GetInstance().AddToQueue("ERROR", __FILE__, __LINE__, __PRETTY_FUNCTION__, __VA_ARGS__)
 
 #endif //!__LOGGER_H__