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Cygwin: pthread: Fix handle leak in pthread_once. 

If pthread_once() is called with pthread_once_t initialized using
PTREAD_ONCE_INIT, pthread_once does not release pthread_mutex used
internally. This patch fixes that by calling pthread_mutex_destroy()
in the thread which has called init_routine.

Reviewed-by: Corinna Vinschen <corinna@vinschen.de>
Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>
This commit is contained in:
Takashi Yano 2024-01-24 22:33:12 +09:00
parent 15140d6df6
commit 2c5433e5da
1 changed files with 3 additions and 0 deletions
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3
winsup/cygwin/thread.cc
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@ -2060,6 +2060,9 @@ pthread::once (pthread_once_t *once_control, void (*init_routine) (void))
{ {
init_routine (); init_routine ();
once_control->state = 1; once_control->state = 1;
pthread_mutex_unlock (&once_control->mutex);
while (pthread_mutex_destroy (&once_control->mutex) == EBUSY);
return 0;
} }
/* Here we must remove our cancellation handler */ /* Here we must remove our cancellation handler */
pthread_mutex_unlock (&once_control->mutex); pthread_mutex_unlock (&once_control->mutex);