1 /* $OpenBSD: rthread_mutex_prio.c,v 1.2 2014/06/23 00:43:15 guenther Exp $ */
2 /*
3 * Copyright (c) 2011 Philip Guenther <guenther@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18
19 #include <errno.h>
20
21 #include <pthread.h>
22 #include "rthread.h"
23
24 int
pthread_mutex_getprioceiling(pthread_mutex_t * mutexp,int * prioceiling)25 pthread_mutex_getprioceiling(pthread_mutex_t *mutexp, int *prioceiling)
26 {
27 pthread_mutex_t mutex = *mutexp;
28
29 if (mutex->prioceiling == -1)
30 return (EINVAL);
31 *prioceiling = mutex->prioceiling;
32
33 return (0);
34 }
35
36 int
pthread_mutex_setprioceiling(pthread_mutex_t * mutexp,int prioceiling,int * old_ceiling)37 pthread_mutex_setprioceiling(pthread_mutex_t *mutexp, int prioceiling,
38 int *old_ceiling)
39 {
40 pthread_mutex_t mutex = *mutexp;
41 int ret;
42
43 if (mutex->prioceiling == -1 ||
44 prioceiling < PTHREAD_MIN_PRIORITY ||
45 prioceiling > PTHREAD_MAX_PRIORITY) {
46 ret = EINVAL;
47 } else if ((ret = pthread_mutex_lock(mutexp)) == 0) {
48 *old_ceiling = mutex->prioceiling;
49 mutex->prioceiling = prioceiling;
50 pthread_mutex_unlock(mutexp);
51 }
52
53 return (ret);
54 }
55