|
Packit |
6c4009 |
/* Get current priority ceiling of pthread_mutex_t.
|
|
Packit |
6c4009 |
Copyright (C) 2006-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library; if not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <errno.h>
|
|
Packit |
6c4009 |
#include <pthreadP.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
int
|
|
Packit |
6c4009 |
pthread_mutex_getprioceiling (const pthread_mutex_t *mutex, int *prioceiling)
|
|
Packit |
6c4009 |
{
|
|
Packit Service |
2b441b |
/* See concurrency notes regarding __kind in struct __pthread_mutex_s
|
|
Packit Service |
2b441b |
in sysdeps/nptl/bits/thread-shared-types.h. */
|
|
Packit Service |
2b441b |
if (__builtin_expect ((atomic_load_relaxed (&(mutex->__data.__kind))
|
|
Packit |
6c4009 |
& PTHREAD_MUTEX_PRIO_PROTECT_NP) == 0, 0))
|
|
Packit |
6c4009 |
return EINVAL;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
*prioceiling = (mutex->__data.__lock & PTHREAD_MUTEX_PRIO_CEILING_MASK)
|
|
Packit |
6c4009 |
>> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return 0;
|
|
Packit |
6c4009 |
}
|