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bpo-33316: PyThread_release_lock always fails (GH-6541)

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Use correct interpretation of return value from APIs.
(cherry picked from commit 05e922136a)

Co-authored-by: native-api <ivan_pozdeev@mail.ru>
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Miss Islington (bot) 2019-02-02 08:45:50 -08:00 • committed by GitHub
parent a2f4c40233
commit c851dfc99b
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2 changed files with 4 additions and 2 deletions
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5
Python/thread_nt.h
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@ -104,8 +104,9 @@ LeaveNonRecursiveMutex(PNRMUTEX mutex)
if (PyMUTEX_LOCK(&mutex->cs))
return FALSE;
mutex->locked = 0;
result = PyCOND_SIGNAL(&mutex->cv);
result &= PyMUTEX_UNLOCK(&mutex->cs);
/* condvar APIs return 0 on success. We need to return TRUE on success. */
result = !PyCOND_SIGNAL(&mutex->cv);
PyMUTEX_UNLOCK(&mutex->cs);
return result;
}