Remove unused macros from i386 lowlevellock.h.
[glibc.git] / nptl / pthread_mutexattr_setprioceiling.c
blobfcd4190faad55e03e301871f39db9ec8b9a1672f
1 /* Change priority ceiling setting in pthread_mutexattr_t.
2 Copyright (C) 2006-2015 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
20 #include <errno.h>
21 #include <pthreadP.h>
22 #include <atomic.h>
25 int
26 pthread_mutexattr_setprioceiling (attr, prioceiling)
27 pthread_mutexattr_t *attr;
28 int prioceiling;
30 /* See __init_sched_fifo_prio. */
31 if (atomic_load_relaxed (&__sched_fifo_min_prio) == -1
32 || atomic_load_relaxed (&__sched_fifo_max_prio) == -1)
33 __init_sched_fifo_prio ();
35 if (__glibc_unlikely (prioceiling
36 < atomic_load_relaxed (&__sched_fifo_min_prio))
37 || __glibc_unlikely (prioceiling
38 > atomic_load_relaxed (&__sched_fifo_max_prio))
39 || __glibc_unlikely ((prioceiling
40 & (PTHREAD_MUTEXATTR_PRIO_CEILING_MASK
41 >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT))
42 != prioceiling))
43 return EINVAL;
45 struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
47 iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
48 | (prioceiling << PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT));
50 return 0;