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/* Copyright (C) 2005-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2005.
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>
int
pthread_mutex_consistent (pthread_mutex_t *mutex)
{
/* Test whether this is a robust mutex with a dead owner.
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.__owner != PTHREAD_MUTEX_INCONSISTENT)
return EINVAL;
mutex->__data.__owner = THREAD_GETMEM (THREAD_SELF, tid);
return 0;
}
weak_alias (pthread_mutex_consistent, pthread_mutex_consistent_np)
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