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fix: hold mutex when signaling cond var #31

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@elupus elupus commented May 8, 2025

If mutex is not held when signalling the condition variable, a thread woken up by the mutex unlock,
may have lower priority than the thread waiting
on the condition leading to priority inversion.

We also don't need to wake up waiters when we
clear events, since this will never trigger
return from the wait.

If mutex is not held when signalling the condition
variable, a thread woken up by the mutex unlock,
may have lower priority than the thread waiting
on the condition leading to priority inversion.

We also don't need to wake up waiters when we
clear events, since this will never trigger
return from the wait.
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