windows mutex waitforsingleobject

最新推荐文章于 2022-11-28 00:43:38 发布

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本文提供了一个使用互斥锁控制线程同步的C++代码示例，展示了如何创建线程并实现互斥操作以避免数据竞争。

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example:

#define THREAD_INSTANCE_NUMBER 3  
LONG g_fResourceInUse  = FALSE;  
LONG g_lCounter = 0;  
HANDLE hMutex;  
DWORD ThreadProc(void *pData)  
{  
	int ThreadNumberTemp = (*(int*)pData);  
	WaitForSingleObject(hMutex, INFINITE);  
	cout << "ThreadProc: " << ThreadNumberTemp << " is running!" << endl;  
	ReleaseMutex(hMutex);  
	return 0;  
}  
int _tmain(int argc, _TCHAR* argv[]){
		int i;  
		DWORD ID[THREAD_INSTANCE_NUMBER];  
		HANDLE h[THREAD_INSTANCE_NUMBER];  
		if ( (hMutex = CreateMutex(NULL, FALSE, FALSE)) == NULL )  
		{  
			cout << "Create Mutex error!" << endl;  
			return 0;  
		}  
		for (i = 0; i < THREAD_INSTANCE_NUMBER; i++)  
		{  
			WaitForSingleObject(hMutex, INFINITE);  
			h[i] = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ThreadProc, (void *)&ID[i], 0, &(ID[i]));  
			if (h[i] == NULL)  
				cout << "CreateThread error" << ID[i] << " " << i << endl;  
			else  
				cout << "CreateThread: " << ID[i] << " " << i << endl;  
			ReleaseMutex(hMutex);  
		}  

		WaitForMultipleObjects(THREAD_INSTANCE_NUMBER, h, TRUE, INFINITE);  
		cout << "Close the Mutex Handle!" << endl;  
		CloseHandle(hMutex);