事件对象实现线程同步（VS2010）

1、主要用到的函数：

　　CreateEvent();

　　ResetEvent();  //将某事件对象设置为非信号状态；

　　SetEvent();  //将某事件对象设置为有信号状态；

 

　　//TRUE代表人工重置的事件对象，当事件有信号时，多有等待的线程都变为可调度线程，可同时运行；最好不要采用人工重置的事件对象；采用自动重置的事件对象，只有一个线

　　//程可调度

　　//FALSE代表非信号状态，最后一个NULL代表匿名的事件对象

　　hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);

 

　　实例代码：

#include <windows.h>
#include <iostream>
#include <stdlib.h>
using namespace std;


DWORD WINAPI MyThreadProc1(LPVOID lpParameter);
DWORD WINAPI MyThreadProc2(LPVOID lpParameter);
DWORD WINAPI MyThreadProc3(LPVOID lpParameter);

int index = 100;
HANDLE hEvent;

int main()
{
	HANDLE handle1,handle2,handle3;
	handle1 = CreateThread(NULL,0,MyThreadProc1,NULL,0,NULL);
	handle2 = CreateThread(NULL,0,MyThreadProc2,NULL,0,NULL);
	handle3 = CreateThread(NULL,0,MyThreadProc3,NULL,0,NULL);

	if(NULL == handle1)
	{
		cout<<"Create Thread failed !"<<endl;
		return -1;
	}
	if(NULL == handle2)
	{
		cout<<"Create Thread failed !"<<endl;
		return -1;
	}
	if(NULL == handle3)
	{
		cout<<"Create Thread failed !"<<endl;
		return -1;
	}

	CloseHandle(handle1);
	CloseHandle(handle2);
	CloseHandle(handle3);

	
	hEvent = CreateEvent(NULL,FALSE,TRUE,NULL);

	SetEvent(hEvent);

	Sleep(2000);
	system("PAUSE");
	return 0;
}
DWORD WINAPI MyThreadProc1(LPVOID lpParameter)
{
	while(true)
	{
		WaitForSingleObject(hEvent,INFINITE);
		if(index > 0)
		{
			Sleep(1);
			cout<<"The Index1 Number is : "<<index--<<endl;
		}
		else 
			break;
	}
	return 0;
}
DWORD WINAPI MyThreadProc2(LPVOID lpParameter)
{
	while(true)
	{
		WaitForSingleObject(hEvent,INFINITE);
		if(index > 0)
		{
			Sleep(1);
			cout<<"The Index2 Number is : "<<index--<<endl;
		}
		else 
			break;
		SetEvent(hEvent);
	}
	return 0;
}

DWORD WINAPI MyThreadProc3(LPVOID lpParameter)
{
	while(true)
	{
		WaitForSingleObject(hEvent,INFINITE);
		if(index > 0)
		{
			Sleep(1);
			cout<<"The Index3 Number is : "<<index--<<endl;
		}
		else 
			break;
	}
	return 0;
}