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
24int
25pthread_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
36int
37pthread_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