多线程-定时器

这不是一个完整的例子：

#include<stdio.h>
#include<stdlib.h>
#include<Windows.h>

//单独定时器只能用于同步通信
HANDLE timer;

void main1()
{
	timer = CreateWaitableTimer(NULL, TRUE, NULL);		//创建定时器

	if (timer == NULL)
	{
		return 0;
	}
	else
	{
		LARGE_INTEGER time;		//精确到小数点后 7位。
		time.QuadPart = -20000000;		// 2秒
		SetWaitableTimer(timer, &time, 0, NULL, 0, NULL);	//设置定时器等待2秒
		if (WaitForSingleObject(timer, TRUE, INFINITE) == WAIT_OBJECT_0)
		{
			printf("等待成功！\n");
		}
		else
		{
			printf("等待失败！\n");
		}

	}



	system("pause");
}

DWORD WINAPI go1(void *p)
{
	MessageBoxA(0, "1", "1", 0);
	timer = CreateWaitableTimer(NULL, TRUE, NULL);
	LARGE_INTEGER time;		//精确到小数点后 7位。
	time.QuadPart = -50000000;		// 2秒
	SetWaitableTimer(timer, &time, 0, NULL, 0, NULL);	//设置定时器等待2秒
}

DWORD WINAPI go2(void *p)
{
	
	MessageBoxA(0, "2", "2", 0);
	printf("等待成功！\n");
	
}

void main()
{
	HANDLE hd = CreateThread(NULL, 0, go1, NULL, 0, NULL);
	if (WaitForSingleObject(hd, INFINITE) == WAIT_OBJECT_0)
	{
		CreateThread(NULL, 0, go2, NULL, 0, NULL);
	}
	else
	{
		printf("等待失败！\n");
	}


	
	system("pause");
}