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Editorial Team
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Asked: 2026-05-13T12:56:30+00:00

I have a function which is part of a class and in this function

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I have a function which is part of a class and in this function there is a mutex.lock at the beginning of the function and a mutex.unlock just before its return. Now I have encountered a situation where the mutex is stuck in the locked state. What could be doing this if this function is the only place where I use that mutex to lock and unlock. The function is called from the main thread and from 1 or 2 other QThreads.

UPDATE: the problem was due to the thread not sleeping in between function calls. Maybe the lack of a sleep relocked the mutex really fast? You could also call yieldCurrentThread();

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1 Answer

  1. Editorial Team

    The mutex was relocking right after unlocking from the same QThread so fast that the main thread didn’t have time to lock it back. Adding a sleep or yieldCurrentThread() fixed the problem

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