Linux多线程C++工具库：liblmp_tool --CurrentThread 类

CurrentThread 类 主要实现 获取当前线程的tid,并在类中保存，后续在ThreadPool中查询时，做一次判断即可。不用每次都查询tid.

Linux多线程编程工具库liblmp_tool   github: https://github.com/Dwyane05/liblmp_tool

头文件实现：

/*
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the License file.
 *
 *  CurrentThread.h
 *  Created on: May 30, 2019
 *  Author:     cuiyongfei
 */

#ifndef LMP_TOOL_CURRENTTHREAD_H
#define LMP_TOOL_CURRENTTHREAD_H

#include "Common.h"

namespace lmp_tool
{
namespace CurrentThread
{
  // internal
  extern __thread int t_cachedTid;
  extern __thread char t_tidString[32];
  extern __thread int t_tidStringLength;
  extern __thread const char* t_threadName;
  void cacheTid();

  inline int ti