创建定时器 和简单的了解了一下APC消息队列 14.4.29

// WaitTimer.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#define _WIN32_WINNT 0x0400
#include "windows.h"
#include "conio.h"


HANDLE g_hTimer=NULL;

VOID CALLBACK TimerProc(LPVOID lpArgToCompletionRoutine,
  DWORD dwTimerLowValue,DWORD dwTimerHighValue)
{
	printf("-----APC Timer--------\n");
}

void APCTimer(){
	HANDLE hTime=CreateWaitableTimer(NULL,false,NULL);
	UINT64 nDueTime=-20000000;
	//设置定时器每隔200毫秒执行一次
	SetWaitableTimer(hTime,(PLARGE_INTEGER)&nDueTime,200,TimerProc,NULL,false);
	//这里想说明的是APC的队列要优先于我们的消息队列
	//我们现在吧MAIN函数给堵塞上了 可是程序还是会继续输出-----APC Timer--------
	while(1){
	SleepEx(-1,true);
	}

	CloseHandle(hTime);

}
DWORD WINAPI ThreadTimer(LPVOID pParam){

	while(1){
	
		WaitForSingleObject(g_hTimer,INFINITE);
		printf("ThreadTimer----\n");
	}
}

void CreateTimer(){
	//创建定时器
	g_hTimer=CreateWaitableTimer(NULL,false,NULL);
	//设置定时器 时间
	//设置一个定时器多久开始
	UINT64 nDueTime=-20000000;
	//设置定时器每隔200毫秒执行一次
	SetWaitableTimer(g_hTimer,(PLARGE_INTEGER)&nDueTime,200,
		NULL,NULL,false);
	
	
	//创建等候线程
	DWORD nID=0;
	HANDLE hThread=CreateThread(NULL,0,ThreadTimer,NULL,0,&nID);
	WaitForSingleObject(hThread,INFINITE);
	//关闭定时器
	CloseHandle(g_hTimer);

}


int main(int argc, char* argv[])
{
	//CreateTimer();
	APCTimer();
	return 0;
}