/*
*NAME:MESA_handle_logger
*INTRODUCTION:Based on logger and thread_safe, provide runtime_log function with independent handle for different users.
*Author:yangwei@iie.ac.cn
*History:
2014-03-24 created by yw
1)第一个动态库版本
2014-04-16 modified by yw
1) 支持g++ 4.4.4编译
2014-05-29 update by yw
1)支持创建用户指定的日志目录
2019-2-18 update by yw
1)性能优化，句柄中存储文件fp，定期flush至文件
2020-09-07 update to libMESA_handle_logger2 by yw
1)内部使用zlog实现，行为变更，更新库为libMESA_handle_logger2
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NOTICE:
1)compatible with g++, extern with c;
2)thread_safe IS supported;
3)DO destroy handle process before exit.
4)demo requires lpthread support
*/
