[PEAK] issues with Trellis event loops and threads
maluke at gmail.com
Sun Jul 20 21:39:00 EDT 2008
There's a problem with using the trellis and activity module in a
multithreaded app. There's a main loop thread with activity.EventLoop
running and there's a rule that runs periodically by rescheduling
itself (in my case it calls wx.ProgressBar.Pulse(), just to give you
an example of why this could be a legitimate use). There's also a
worker thread that initiates this process, but due to EventLoop and
Time being context.Service this doesn't work as expected -- the
dependency on _Timer instance (Time[0.1] for example) created from a
worker thread doesn't schedule a recalculation.
See test in attached file -- it should't hang up, but it does as
do_update rule only runs once.
I tried to fix it by restoring state from the main thread in the
worker thread but it's rather non-trivial as the State instances seem
to rely on a threadlocal data. If there's a proper way to do it, I'd
be happy to learn what it is. Thanks a lot in advance.
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