[issue38106] Race in PyThread_release_lock - can lead to memory corruption and deadlock

[Kirill Smelkov]

Kirill Smelkov <kirr at nexedi.com> added the comment:

And it is indeed better to always do pthread_cond_signal() from under mutex.
Many pthread libraries delay the signalling to associated mutex unlock, so
there should be no performance penalty here and the correctness is much more
easier to reason about.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38106>
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