1/* Copyright (C) 2005-2023 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
22int
23__pthread_mutex_consistent (pthread_mutex_t *mutex)
24{
25 /* Test whether this is a robust mutex with a dead owner.
26 See concurrency notes regarding __kind in struct __pthread_mutex_s
27 in sysdeps/nptl/bits/thread-shared-types.h. */
28 if ((atomic_load_relaxed (&(mutex->__data.__kind))
29 & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0
30 || mutex->__data.__owner != PTHREAD_MUTEX_INCONSISTENT)
31 return EINVAL;
32
33 mutex->__data.__owner = THREAD_GETMEM (THREAD_SELF, tid);
34
35 return 0;
36}
37versioned_symbol (libc, __pthread_mutex_consistent, pthread_mutex_consistent,
38 GLIBC_2_34);
39
40#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_4, GLIBC_2_34)
41# undef pthread_mutex_consistent_np
42compat_symbol (libpthread, __pthread_mutex_consistent,
43 pthread_mutex_consistent_np, GLIBC_2_4);
44#endif
45
46#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_34)
47compat_symbol (libpthread, __pthread_mutex_consistent,
48 pthread_mutex_consistent, GLIBC_2_12);
49#endif
50