多線程--事件Event

//

#include "stdafx.h"

#include <stdio.h>  
#include <process.h>  
#include <windows.h>  

long g_nNum;  
unsigned int __stdcall Fun(void *pPM);  
const int THREAD_NUM = 10;  

CRITICAL_SECTION g_csThreadCode;  
HANDLE g_hEvent;
int main()  
{  
	/*
	LPSECURITY_ATTRIBUTES lpEventAttributes,
	BOOL bManualReset,	手動置位
	BOOL bInitialState, true有信号，false無信号
	LPCWSTR lpName
	*/
	g_hEvent = CreateEvent(NULL,FALSE,FALSE,NULL);//第3個參數必須為false，需要讓主線程等待。
	InitializeCriticalSection(&g_csThreadCode);  

	HANDLE  handle[THREAD_NUM];   
	g_nNum = 0;   
	int i = 0;  
	while (i < THREAD_NUM)   
	{  
		handle[i] = (HANDLE)_beginthreadex(NULL, 0, Fun, &i, 0, NULL);  
		WaitForSingleObject(g_hEvent, INFINITE); //等待事件有信号
		i++;  
	}  
	WaitForMultipleObjects(THREAD_NUM, handle, TRUE, INFINITE);  

	CloseHandle(g_hEvent);  
	DeleteCriticalSection(&g_csThreadCode);  
	for (i = 0; i < THREAD_NUM; i++)  
		CloseHandle(handle[i]);  
	return 0;  
}  
unsigned int __stdcall Fun(void *pPM)  
{  
	int nThreadNum = *(int *)pPM;  
	SetEvent(g_hEvent);

	Sleep(50);//some work should to do  

	EnterCriticalSection(&g_csThreadCode);  
	g_nNum++;  
	Sleep(0);//some work should to do  
	printf("線程編号為%d  全局資源值為%d\n", nThreadNum, g_nNum);  
	LeaveCriticalSection(&g_csThreadCode);  
	return 0;  
}  
           

備注：CreateEvent(NULL,FALSE,FALSE,NULL);//第3個參數必須為false，需要讓主線程等待。

如果為自動置位，則對該事件調用WaitForSingleObject()後會自動調用ResetEvent()使事件變成未觸發狀态。