| 1 | /* Copyright (C) 2002-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <errno.h> |
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| 19 | #include "pthreadP.h" |
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| 20 | #include <shlib-compat.h> |
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| 21 | #include <stap-probe.h> |
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| 22 | |
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| 23 | |
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| 24 | int |
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| 25 | ___pthread_mutex_destroy (pthread_mutex_t *mutex) |
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| 26 | { |
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| 27 | LIBC_PROBE (mutex_destroy, 1, mutex); |
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| 28 | |
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| 29 | /* See concurrency notes regarding __kind in struct __pthread_mutex_s |
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| 30 | in sysdeps/nptl/bits/thread-shared-types.h. */ |
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| 31 | if ((atomic_load_relaxed (&(mutex->__data.__kind)) |
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| 32 | & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0 |
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| 33 | && mutex->__data.__nusers != 0) |
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| 34 | return EBUSY; |
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| 35 | |
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| 36 | /* Set to an invalid value. Relaxed MO is enough as it is undefined behavior |
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| 37 | if the mutex is used after it has been destroyed. But you can reinitialize |
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| 38 | it with pthread_mutex_init. */ |
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| 39 | atomic_store_relaxed (&(mutex->__data.__kind), -1); |
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| 40 | |
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| 41 | return 0; |
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| 42 | } |
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| 43 | versioned_symbol (libc, ___pthread_mutex_destroy, pthread_mutex_destroy, |
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| 44 | GLIBC_2_0); |
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| 45 | libc_hidden_ver (___pthread_mutex_destroy, __pthread_mutex_destroy) |
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| 46 | #ifndef SHARED |
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| 47 | strong_alias (___pthread_mutex_destroy, __pthread_mutex_destroy) |
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| 48 | #endif |
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| 49 | |
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| 50 | #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_34) |
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| 51 | compat_symbol (libpthread, ___pthread_mutex_destroy, __pthread_mutex_destroy, |
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| 52 | GLIBC_2_0); |
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| 53 | #endif |
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| 54 | |
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