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POHow to keep message-pumping while waiting?
 

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  1. POHow to keep message-pumping while waiting?
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    <p>I have an application that is based on a message-pump thread-pool archtecture. Whenever there is an action that could block, it is implemented as "callback on complete/trigger evnet" action, so it won't stall the executing thread.</p> <p>While this techniqiue is appropriate for most cases, there are situations when it becomes very inconvinient and over-complicates the code.</p> <p>What I'd like to be able to do is, to keep processing events while waiting, in a transparent way, without breaking the function up into pre/post waiting parts.</p> <p>How should I do this?</p> <p>I had two options in mind:</p> <ol> <li>Run the message loop from within the executing function while waiting.</li> <li>Create a new working thread while waiting, and terminating it (in a proper way) when resuming.</li> </ol> <p>Both options have their flaws, to name a few:</p> <p>For 1:</p> <ul> <li>Could potentially result in stack overflow.</li> <li>Could potentially end up dead-locked.</li> <li>If the inner message results in waiting for a second event to complete, and the outer event completes in the meanwhile, the outer function can't continue until the second event completes, and this situation can expand.</li> </ul> <p>Option 2 can simply end up in creating more and more threads.</p> <p>Ofcourse, there might be other options that I haven't thought of.</p> <p><strong>EDIT:</strong> Language is C++, so functions can't be stepped out of and into in an easy (portable?) manner. Platform is Windows (API), although I don't think it's relevant.</p>
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    1. USDaniel Earwicker
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