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多个线程同时读写同一个数据，必定是要同步的，没写同步代码肯定是有问题的，写个代码测试一下就知道了
#include "stdafx.h"
CRITICAL_SECTION cs;
struct ThreadStruct [COLOR="Green"]//线程结构[/COLOR]
{
int nTest;
float fTest;
};
[COLOR="Green"]//线程函数[/COLOR]
DWORD CALLBACK ThreadFun(LPVOID pParam)
{
ThreadStruct* pThreadStruct = (ThreadStruct*)pParam;
EnterCriticalSection(&cs); [COLOR="Green"]//同步好线程[/COLOR]
cout << "nTest:\t" << pThreadStruct->nTest << endl
<< "fTest:\t" << pThreadStruct->fTest << endl;
pThreadStruct->nTest = 5000;
pThreadStruct->fTest = 3.5;
LeaveCriticalSection(&cs);
return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{
InitializeCriticalSection(&cs);
ThreadStruct* pThreadStruct = new ThreadStruct;
pThreadStruct->nTest = 0;
pThreadStruct->fTest = 0;
CreateThread(0, 0, ThreadFun, pThreadStruct, 0, 0);
CreateThread(0, 0, ThreadFun, pThreadStruct, 0, 0);
system("pause");
return 0;
} |
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