Discussion: deal with time change event in win32 service program

In my program, I want to get local time in real time and if the time fits with the setting of my program, another thread will wake up ,do some operations and sleep. After some hours, the time fit with the setting again the thread is waked up again and......

I don't want to use loop to get current time, are there any good idea about this situation?


thanks a lot

Making a virus are we?

si basically, your program would be running in the background the whole time the computer's on?

Use SetTimer() to send you a WM_TIMER message when the timer expires.

Waitable timers are ideal for this task. Your lazy thread could look something like this:

Code:

---

HANDLE hTimer = CreateWaitableTimer(NULL, TRUE, NULL);

while (TRUE)
{
        /* Set liDueTime to the time you want the timer to trigger. */

        SetWaitableTimer(hTimer, &liDueTime, 0, NULL, NULL, FALSE);
        WaitForSingleObject(hTimer, INFINITE);


        /* Do work here. */
}

---

Waitable timers can even wake your computer up from suspend mode (if supported).

Thanks, anonytmouse. After I posted this thread, I read some chapters of jeffrey's "advanced windows programming" again and then...... :p the answer is in your thread.

to prog-bman: not a virus, just a common win32 service program :)

Why not use the OS scheduler to just say when you want your main program to run?

To Salem: I'm sorry, I don't understand the meaning of your thread. Would you mind explain it in detail?

http://www.iopus.com/guides/winscheduler.htm

Oh, I see..... but I just want some thread in my program to be waked up in some time interval. Task scheduler does not afford this mechanism. Anyway, thanks

Oh please, you can set multiple events for the same program

Can you use the task scheduler to wake individual threads within an application? I don't use it, so am no expert. As I suggested already, I'd use one of the various OS supplied timer functions.