Avoid another potential deadlock for good measure.
Firing these signals while locked is not a good idea, Sequence/ControlList need a better design for this that accounts for recording and lockedness.
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@ -446,8 +446,10 @@ MidiRegion::model_automation_state_changed (Evoral::Parameter const & p)
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for a given set of filtered_parameters, so now that we've changed that list we must invalidate
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the iterator.
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*/
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Glib::Threads::Mutex::Lock lm (midi_source(0)->mutex());
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midi_source(0)->invalidate (lm);
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Glib::Threads::Mutex::Lock lm (midi_source(0)->mutex(), Glib::Threads::TRY_LOCK);
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if (lm.locked()) {
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midi_source(0)->invalidate (lm);
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}
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}
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/** This is called when a trim drag has resulted in a -ve _start time for this region.
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