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Call method from a different thread

Posted on 2008-09-30
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Last Modified: 2013-12-17
I have an application that uses 2 threads, one for calculations and one for displaying an UI. I need to call a method that is in the calculation thread from the UI thread. When I call methods located in the UI thread from the calculation thread I use Invoke, but the other way around is not working.
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Question by:marioana
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mastoo earned 250 total points
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You can't really interrupt a non-Gui thread like that, to call from another thread.  You would instead do some kind of synchronization.  For instance, your calc thread might have a queue and the gui thread enqueues "requests" on it.  The calc thread then periodically polls the queue.  You'd need some kind of sync on the queue to avoid concurrent access by both threads.

Or if the calc thread finishes and you want the gui to tell it there is more to do, the calc thread waits on a sync event that the gui can raise.
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by:marioana
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In the end it seems it's not a threadng problem, but my question was threading related, so I thank you for the answer.
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