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/* Change priority ceiling setting in pthread_mutexattr_t.
Copyright (C) 2006-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
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
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthreadP.h>
int
pthread_mutexattr_setprioceiling (pthread_mutexattr_t *attr, int prioceiling)
{
if (__sched_fifo_min_prio == -1)
__init_sched_fifo_prio ();
if (__builtin_expect (prioceiling < __sched_fifo_min_prio, 0)
|| __builtin_expect (prioceiling > __sched_fifo_max_prio, 0)
|| __builtin_expect ((prioceiling
& (PTHREAD_MUTEXATTR_PRIO_CEILING_MASK
>> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT))
!= prioceiling, 0))
return EINVAL;
struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
| (prioceiling << PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT));
return 0;
}
|
