1/* Copyright (C) 2002-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include "pthreadP.h"
20#include <shlib-compat.h>
21#include <stap-probe.h>
22
23
24int
25___pthread_mutex_destroy (pthread_mutex_t *mutex)
26{
27 LIBC_PROBE (mutex_destroy, 1, mutex);
28
29 /* See concurrency notes regarding __kind in struct __pthread_mutex_s
30 in sysdeps/nptl/bits/thread-shared-types.h. */
31 if ((atomic_load_relaxed (&(mutex->__data.__kind))
32 & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0
33 && mutex->__data.__nusers != 0)
34 return EBUSY;
35
36 /* Set to an invalid value. Relaxed MO is enough as it is undefined behavior
37 if the mutex is used after it has been destroyed. But you can reinitialize
38 it with pthread_mutex_init. */
39 atomic_store_relaxed (&(mutex->__data.__kind), -1);
40
41 return 0;
42}
43versioned_symbol (libc, ___pthread_mutex_destroy, pthread_mutex_destroy,
44 GLIBC_2_0);
45libc_hidden_ver (___pthread_mutex_destroy, __pthread_mutex_destroy)
46#ifndef SHARED
47strong_alias (___pthread_mutex_destroy, __pthread_mutex_destroy)
48#endif
49
50#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_34)
51compat_symbol (libpthread, ___pthread_mutex_destroy, __pthread_mutex_destroy,
52 GLIBC_2_0);
53#endif
54