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04277e02 | 1 | /* Copyright (C) 2002-2019 Free Software Foundation, Inc. |
76a50749 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
76a50749 | 18 | |
f6c93bd9 | 19 | #include <errno.h> |
76a50749 UD |
20 | #include "pthreadP.h" |
21 | ||
5acf7263 RM |
22 | #include <stap-probe.h> |
23 | ||
76a50749 UD |
24 | |
25 | int | |
9d46370c | 26 | __pthread_mutex_destroy (pthread_mutex_t *mutex) |
76a50749 | 27 | { |
5acf7263 RM |
28 | LIBC_PROBE (mutex_destroy, 1, mutex); |
29 | ||
403b4feb SL |
30 | /* See concurrency notes regarding __kind in struct __pthread_mutex_s |
31 | in sysdeps/nptl/bits/thread-shared-types.h. */ | |
32 | if ((atomic_load_relaxed (&(mutex->__data.__kind)) | |
33 | & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0 | |
0f6699ea UD |
34 | && mutex->__data.__nusers != 0) |
35 | return EBUSY; | |
f6c93bd9 | 36 | |
403b4feb SL |
37 | /* Set to an invalid value. Relaxed MO is enough as it is undefined behavior |
38 | if the mutex is used after it has been destroyed. But you can reinitialize | |
39 | it with pthread_mutex_init. */ | |
40 | atomic_store_relaxed (&(mutex->__data.__kind), -1); | |
dcc73a8d | 41 | |
76a50749 UD |
42 | return 0; |
43 | } | |
fa872e1b | 44 | weak_alias (__pthread_mutex_destroy, pthread_mutex_destroy) |
4d17e683 | 45 | hidden_def (__pthread_mutex_destroy) |