Deadlocks usually occur across several threads. Do you have a stack trace for other threads, too?
Alexey On Fri, 2024-07-19 at 12:12 +0100, Nuno Santos via Interest wrote: > Dennis, > > Thanks for the clarification. > > Maybe it is deviating a bit from Qt. It’s probably something I’m not > doing correctly from the Qt paradigm perspective but this is one of > those problems where I feeling lost. > > I’ve just had one of those rare deadlock and it happened like this: > > - This is a music making application. I have the audio processing and > the GUI. > - In the audio render thread, I call the processing of the sequencer > which is responsible for handling the music events. > - There are visual representations of this elements that contains the > notes that are being played > - During the processing of the musical steps, there is a signal that > is being called. It got stuck there. > > But invoking a method as a queue connection in another thread > shouldn’t be a problem, right? > > QMetaObject::invokeMethod(this, &DSClip::stepChanged, > Qt::QueuedConnection); > > This invoke will trigger a signal that will request the DSClip visual > instance to be updated on the QML side. > > Here is the place it got stuck in the audio render thread. It got > locked when invoking the method. > > Does this ring any bell? > > Thanks! > > Best, > > Nuno > > > > > On 19 Jul 2024, at 12:00, Dennis Luehring <dl.so...@gmx.net> wrote: > > > > Am 19.07.2024 um 12:52 schrieb Nuno Santos: > > > Can data race cause deadlocks? > > > > > > Or should I explicitly look for deadlock: "lock-order-inversion > > > (potential deadlock)” > > > > > > data races can maybe get you into deadlocks someway... but you > > should > > look for lock-order-inversions and fix them (even if very hard to > > sometimes understand why they happening) > > > > > > btw: the discussion is drifting away from Qt itself :) > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest
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