CRITICAL_SECTION 学习

 

// Critsetion.cpp : 定义控制台应用程序的入口点。
//#include "stdafx.h"
#include <Windows.h>
#include <iostream>
#include <process.h>
using namespace std;CRITICAL_SECTION g_cs;
char name[]="zhangdongsheng";unsigned __stdcall ThreadPoc1( void* pArguments)
{while (1){EnterCriticalSection(&g_cs); //如果此处不对全局变量name进行加锁//那么输出结果将有可能出现不一致现象memset(name,0,sizeof(name));strcpy(name,"Thread1");Sleep(600);cout<<"Thread1 "<<name<<endl;LeaveCriticalSection(&g_cs);}return 0;
}
unsigned __stdcall ThreadPoc2( void* pArguments)
{while(1){EnterCriticalSection(&g_cs);memset(name,0,sizeof(name));strcpy(name,"Thread2");Sleep(500);cout<<"Thread2 "<<name<<endl;LeaveCriticalSection(&g_cs);}return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{InitializeCriticalSection(&g_cs);HANDLE hThread1=(HANDLE)_beginthreadex(NULL,0,ThreadPoc1,NULL,0,NULL);HANDLE hThread2=(HANDLE)_beginthreadex(NULL,0,ThreadPoc2,NULL,0,NULL);CloseHandle(hThread1);CloseHandle(hThread2);while(1){Sleep(500);}DeleteCriticalSection(&g_cs);return 0;
}

不加锁会出现不一致的情况

加锁后：