计时器

// 计时器.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <windows.h>
#include <iostream>
#include <time.h>
using namespace std;

BOOL __IsLoop = TRUE;


void GetSystemTime();
DWORD WINAPI ThreadProc(LPVOID parameterData);


int main()
{
    HANDLE ThreadHandle = CreateThread(
        NULL,
        0,
        (LPTHREAD_START_ROUTINE)ThreadProc,
        NULL,
        0,
        NULL
        );

    printf("input any key to exit
");
    getchar();
    __IsLoop = FALSE;
    WaitForSingleObject(ThreadHandle, INFINITE);

    if (ThreadHandle != NULL)
    {
        CloseHandle(ThreadHandle);
        ThreadHandle = NULL;
    }

    
    return 0;
}

DWORD WINAPI ThreadProc(LPVOID parameterData)
{
    LARGE_INTEGER DueTime;
    DueTime.QuadPart = -10'000'000LL;//倒计时1秒

    HANDLE TimeHandle = NULL;
    TimeHandle =
        CreateWaitableTimer(
            NULL,
            //TRUE, //BOOL  bManualReset
            FALSE,
            NULL
        );


    //同步事件(synchronizationEvent)
    //当事件对象为激发时，如遇到KeWaitForXX等内核函数，事件对象则自动变回未激发态
    //通知事件(NotificationEvent)
    //当事件对象为激发时，如遇到KeWaitForXX等内核函数，事件对象则不会自动变回未激发态
    
    while (__IsLoop)
    {
        if (!SetWaitableTimer(TimeHandle, &DueTime, 0, NULL, NULL, 0))
        {
            printf("SetWaitableTimer FAIL: %d  
", GetLastError());
            return 0;
        }

        BOOL IsOk = WaitForSingleObject(TimeHandle, INFINITE);
        IsOk -= WAIT_OBJECT_0;

        if (IsOk==0)
        {
            system("cls");
            GetSystemTime();
            printf("Timer was signaled
");
        }
        else
        {
            break;
        }
    }
    CancelWaitableTimer(TimeHandle);
    CloseHandle(TimeHandle);
    TimeHandle = NULL;
    printf("ThreadProc Exit
");

    return 0;
}

void GetSystemTime()
{
    time_t t = time(0);
    char tmp[64];
    strftime(tmp, sizeof(tmp), "%Y/%m/%d %X %A 本年第%j天 %z", localtime(&t));
    puts(tmp);
}