mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 21:20:18 +00:00
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include "pthreadP.h"
|
|
|
|
#include <stap-probe.h>
|
|
|
|
|
|
int
|
|
__pthread_mutex_destroy (pthread_mutex_t *mutex)
|
|
{
|
|
LIBC_PROBE (mutex_destroy, 1, mutex);
|
|
|
|
/* See concurrency notes regarding __kind in struct __pthread_mutex_s
|
|
in sysdeps/nptl/bits/thread-shared-types.h. */
|
|
if ((atomic_load_relaxed (&(mutex->__data.__kind))
|
|
& PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0
|
|
&& mutex->__data.__nusers != 0)
|
|
return EBUSY;
|
|
|
|
/* Set to an invalid value. Relaxed MO is enough as it is undefined behavior
|
|
if the mutex is used after it has been destroyed. But you can reinitialize
|
|
it with pthread_mutex_init. */
|
|
atomic_store_relaxed (&(mutex->__data.__kind), -1);
|
|
|
|
return 0;
|
|
}
|
|
weak_alias (__pthread_mutex_destroy, pthread_mutex_destroy)
|
|
hidden_def (__pthread_mutex_destroy)
|