Calling function after a halt

I want my application to run particular code after 1hr and so on. Its a checking some file program after a particular time period of 1hr. Then again check it after 1hr. The application starts with system startup.

Im writing it in raw winapi and how do I call a function with a gap of 1hr. Im trying from window callback function but dont think that this is the proper way.

Now Im just putting that function in WM_INITDIALOG and its just for 1 time running purpose. How do I make this function to call automatically after a halt (ie: using Sleep) of 1hr. ?

If your main thread should remain responsible you need to set up a thread which does the job.

Code:

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  _beginthread(ThreadFunc, 0, 0);

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To wait for an hour in a thread call

Code:

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    void ThreadFunc(void* p)
    {
        Sleep(3600000);
        doWhatMustBeDone();
    }

---

For a periodical thing do the above into a loop.

Regards, Alex

Thats not the problem, I can use multithread but where to put this _beginthread() for calling the function.

I mean where do I place this new thread inside my application window procedure ie: callback function.

Why not just use a while loop with a sleep in it, or a timer?

It may also be worth looking at Windows Task Scheduler, e.g. http://msdn.microsoft.com/en-us/libr...(v=VS.85).aspx

Quote:

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Originally Posted by hypheni

Thats not the problem, I can use multithread but where to put this _beginthread() for calling the function.

I mean where do I place this new thread inside my application window procedure ie: callback function.

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Have you thought to try some threading samples/tutorials from the internet? Wouldn't looking through some of these be a good place to start?


__________________________________________________________
Arjay

See my latest series on using WCF to communicate between a Windows Service and WPF task bar application.
Tray Notify - Part I Tray Notify - Part II

Need a little help with Win32 thread synchronization? Check out the following CG articles and posts:
Sharing a thread safe std::queue between threads w/progress bar updating
Simple Thread: Part I Simple Thread: Part II
Win32 Thread Synchronization, Part I: Overview Win32 Thread Synchronization, Part 2: Helper Classes

www.iridyn.com

Okay. Can I use SetTimer in InitDialog and then process the function in wm_timer. And I think the multithreading part should be used here for not hanging the application.

Quote:

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Originally Posted by hypheni

Okay. Can I use SetTimer in InitDialog and then process the function in wm_timer. And I think the multithreading part should be used here for not hanging the application.

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Right. So maybe a good approach is to start by looking at other threading examples from the internet.


__________________________________________________________
Arjay

See my latest series on using WCF to communicate between a Windows Service and WPF task bar application.
Tray Notify - Part I Tray Notify - Part II

Need a little help with Win32 thread synchronization? Check out the following CG articles and posts:
Sharing a thread safe std::queue between threads w/progress bar updating
Simple Thread: Part I Simple Thread: Part II
Win32 Thread Synchronization, Part I: Overview Win32 Thread Synchronization, Part 2: Helper Classes

www.iridyn.com

I cleared all my doubts from my previous post related about _beginthread.

But tell me one thing is WM_INITDIALOG the right place to put this code ?. Cause my application will run until unless user clicks on it.

Instead of using _beginthread, you'll want to use _beginthreadex.

Also, don't use Sleep( ) with a long timeout because with sleep you lose control over the thread.

Instead use WaitForSingleObject( ) inside the thread with a timeout.

Something like:

Code:

---

switch( ::WaitForSingleObject( ..., LONG_TIMEOUT_VALUE ) )
{
case WFSO_SHUTDOWN_INDEX:
  return 1;  // shutdown event set, so bail
case WAIT_TIMEOUT:
  DoWorkOnTimeout( );
  break;
}

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By the sound of what you are trying to do, it sounds like you need a service app more than a Windows app.

Its an application which fetches some data from internet and display it on a dialogbox.

Okay. Keep in mind that you won't be able to directly update the UI from the worker thread.