CreateSemaphore event set

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How to set event in case of calling CreateSemaphore ? I mean what I should use to avoid Main from exiting before my threads if I am implying CreateSemaphore in the Main itself??? I am using QueueUserWorkItem with Semaphore. Anybody please.

Posted 18-Feb-12 5:36am

Abhineet Ayan Verma

Updated 18-Feb-12 5:37am

v2

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Albert Holguin · Accepted Answer · 2012-02-18T10:33:00

Solution 1

If you need to prevent main from exiting before your worker threads, then a semaphore really has nothing to do with that. You have to wait for your threads to finish. Do this by using the WaitForMultipleObjects() call with your thread handles.

http://msdn.microsoft.com/en-us/library/windows/desktop/ms687025%28v=vs.85%29.aspx[^]

Posted 18-Feb-12 10:33am

Albert Holguin

Updated 18-Feb-12 11:12am

v3

Comments

Abhineet Ayan Verma 20-Feb-12 0:02am

I am using QueueUserWorkItem to create multiple threads, so cant use WaitForMultipleObjects as it needs an array of Handles in its second parameter.

Albert Holguin 20-Feb-12 1:19am

That's .net, is your application .net? Please tag accordingly.

Abhineet Ayan Verma 20-Feb-12 1:21am

No, my application is not .Net. Its WinAPI Win32 C.

Albert Holguin 20-Feb-12 1:55am

Oh ok (.net version is the first thing that comes up on MSDN)... Well, use a synchronization event and pass the event handle to the thread, when he's done, he can signal the event. Main can simply wait for the event (or events). See CreateEvent(), ResetEvent(), and SetEvent().

Abhineet Ayan Verma 20-Feb-12 1:58am

Thanks Albert Holguin, I am already using the CreateEvent Method but was stuck in the logic as to when call the SetEvent as I am having a thread pool. I got the solution by using InterlockedIncrement and InterlockedDecrement. Thanks anyways for your efforts.