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Star
Guest
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 Posted: Thu Mar 03, 2005 10:45 pm Post subject: Wake up a thread after calling Sleep() funtion |
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Hi,
Is there anyway to do this?
If I have a thread, and inside the Execute method I do
Sleep(30000)
Can I wake up that thread from the main thread? I tried with Resume but it
didn't
work.
Thanks
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Remy Lebeau (TeamB)
Guest
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| Posted: Thu Mar 03, 2005 11:17 pm Post subject: Re: Wake up a thread after calling Sleep() funtion |
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"Star" <nospam (AT) nospam (DOT) com> wrote
| Quote: | If I have a thread, and inside the Execute method I do
Sleep(30000)
Can I wake up that thread from the main thread?
|
No. You cannot interrupt Sleep(). It does not return until the specified
interval has elapsed. If you need to wake up a sleeping thread, then you
need to use a smaller interval and then loop the Sleep(), ie:
for(DWORD dw = 0; dw < 30; ++dw)
{
Sleep(1000);
if( SomeCondition )
break;
}
Otherwise, use CreateEvent() and WaitForSingleObject() instead:
HANDLE hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
//...
WaitForSingleObject(hEvent, 30000);
//...
CloseHandle(hEvent);
Other threads can call SetEvent() using the HANDLE in order to cause
WaitForSingleObject() to exit sooner than the timeout.
Gambit
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Star
Guest
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| Posted: Fri Mar 04, 2005 2:47 am Post subject: Re: Wake up a thread after calling Sleep() funtion |
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Thanks a lot for the examples, Remy. I think I will use CreateEvent()
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Sam S. Firouz
Guest
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| Posted: Tue Mar 08, 2005 7:05 pm Post subject: Re: Wake up a thread after calling Sleep() funtion |
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You can also check out TEvent. The nice people at Borland have wraped
CreateEvent and all its complex functions into a simple class.
Sam
"Star" <nospam (AT) nospam (DOT) com> wrote
| Quote: | Thanks a lot for the examples, Remy. I think I will use CreateEvent()
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