1 /* Get priority ceiling setting from 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/>. */
25 pthread_mutexattr_getprioceiling (attr, prioceiling)
26 const pthread_mutexattr_t *attr;
29 const struct pthread_mutexattr *iattr;
32 iattr = (const struct pthread_mutexattr *) attr;
34 ceiling = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
35 >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT);
39 /* See __init_sched_fifo_prio. */
40 if (atomic_load_relaxed (&__sched_fifo_min_prio) == -1)
41 __init_sched_fifo_prio ();
42 if (ceiling < atomic_load_relaxed (&__sched_fifo_min_prio))
43 ceiling = atomic_load_relaxed (&__sched_fifo_min_prio);
46 *prioceiling = ceiling;