我想用CreateTimerQueueTimer(...)
來經常運行一個函數。用CreateTimerQueueTimer,Visual Studio 2012,C++創建一個定時器,定期運行
我使用從MSDN的例子,主要是該行關注我:
CreateTimerQueueTimer(&hTimer, hTimerQueue,(WAITORTIMERCALLBACK)TimerRoutine, &arg , 50,100, 0)
其語法是:
BOOL WINAPI CreateTimerQueueTimer(
_Out_ PHANDLE phNewTimer,
_In_opt_ HANDLE TimerQueue,
_In_ WAITORTIMERCALLBACK Callback,
_In_opt_ PVOID Parameter,
_In_ DWORD DueTime,
_In_ DWORD Period,
_In_ ULONG Flags
);
倒數第二個參數狀態
期[in]
t的週期他計時器,以毫秒爲單位。如果此參數爲零,則定時器發信號一次。如果此參數大於零,則定時器是週期性的。週期性計時器每次經過一段時間後自動重新激活,直到計時器被取消。
正如你可以在我的代碼中看到的,我將50的期限和期限設置爲100.當我運行它時,它不會啓動repeat
觸發定時器。有人可以幫我弄這個嗎 ?
這裏是整個代碼:
#include "stdafx.h"
#include <string>
#include <iostream>
#include <thread>
#include <Windows.h>
#include <stdio.h>
using namespace std;
HANDLE gDoneEvent;
VOID CALLBACK TimerRoutine(PVOID lpParam, BOOLEAN TimerOrWaitFired)
{
if (lpParam == NULL)
{
printf("TimerRoutine lpParam is NULL\n");
}
else
{
// lpParam points to the argument; in this case it is an int
printf("Timer routine called. Parameter is %d.\n",
*(int*)lpParam);
if(TimerOrWaitFired)
{
printf("The wait timed out.\n");
}
else
{
printf("The wait event was signaled.\n");
}
}
SetEvent(gDoneEvent);
}
int main()
{
HANDLE hTimer = NULL;
HANDLE hTimerQueue = NULL;
int arg = 123,x;
// Use an event object to track the TimerRoutine execution
gDoneEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
if (NULL == gDoneEvent)
{
printf("CreateEvent failed (%d)\n", GetLastError());
return 1;
}
// Create the timer queue.
hTimerQueue = CreateTimerQueue();
if (NULL == hTimerQueue)
{
printf("CreateTimerQueue failed (%d)\n", GetLastError());
return 2;
}
// Set a timer to call the timer routine in 10 seconds.
if (!CreateTimerQueueTimer(&hTimer, hTimerQueue,(WAITORTIMERCALLBACK)TimerRoutine, &arg , 50,100, 0))
{
printf("CreateTimerQueueTimer failed (%d)\n", GetLastError());
return 3;
}
// TODO: Do other useful work here
printf("Call timer routine in 10 seconds...\n");
// Wait for the timer-queue thread to complete using an event
// object. The thread will signal the event at that time.
if (WaitForSingleObject(gDoneEvent, INFINITE) != WAIT_OBJECT_0)
printf("WaitForSingleObject failed (%d)\n", GetLastError());
CloseHandle(gDoneEvent);
// Delete all timers in the timer queue.
if (!DeleteTimerQueue(hTimerQueue))
printf("DeleteTimerQueue failed (%d)\n", GetLastError());
cin>>x;
return 0;
}
謝謝
http://www.sscce.org/ –
您的代碼適用於我。你期望的輸出是什麼? – Sunius
'通話計時器例程在10秒內... 計時器例程被調用。參數是123. 等待超時' 然後它等待我的鍵盤命令。 – user3463936