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POC# Running IronPython On Multiple Threads
 

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  1. POC# Running IronPython On Multiple Threads
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    <p>I have a WPF app that controls audio hardware. It uses the same PythonEngine on multiple threads. This causes strange errors I see from time to time where the PythonEngines Globals dictionary has missing values. I am looking for some guidance on how to debug/fix this. </p> <p>The device has multiple components [filter's, gain's, etc.]. Each component has multiple controls [slider's,togglebutton's, etc.]. </p> <p>Everytime a user changes a control value a python script (from the hardware vendor) needs to run. I am using IronPython 1.1.2(PythonEngine.Execute(code)) to do this. </p> <p>Every component has a script. And each script requires the current values of all controls (of that component) to run.</p> <p>The sequence is - user makes change > run component script > send results to device > check response for failure. This whole cycle takes too long to keep the UI waiting so everytime something changes I do something like component.begininvoke(startcycle).</p> <p>Startcycle looks something like this -</p> <pre><code>PyEngine Engine = PyEngine.GetInstance(); // this is a singleton lock(component) // this prevents diff controls of the same component from walking over each other { Engine.runcode(...) } </code></pre> <p>When <em>different</em> component.begininvokes happen close to each other there are chances where engine.runcode is happening on different threads at the same time. It looks like I need to get rid of the component.begininvoke but that would make things crawl. Any ideas?</p>
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    1. COyou posted this a year ago, but I'm researching solutions for a similar sort of problem. Did you end up getting it to work? I was thinking that it's not simultaneous access to the engine that's causing problems, but maybe you need to create a separate ScriptScope for each thread. I'm curious to know how you ended up solving your problem.
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