2 * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Daniel Eischen.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include "thr_private.h"
40 __weak_reference(_pthread_mutexattr_getprioceiling, pthread_mutexattr_getprioceiling);
41 __weak_reference(_pthread_mutexattr_setprioceiling, pthread_mutexattr_setprioceiling);
42 __weak_reference(_pthread_mutex_getprioceiling, pthread_mutex_getprioceiling);
43 __weak_reference(_pthread_mutex_setprioceiling, pthread_mutex_setprioceiling);
46 _pthread_mutexattr_getprioceiling(pthread_mutexattr_t *mattr, int *prioceiling)
53 *prioceiling = (*mattr)->m_ceiling;
59 _pthread_mutexattr_setprioceiling(pthread_mutexattr_t *mattr, int prioceiling)
65 else if (prioceiling <= PTHREAD_MAX_PRIORITY &&
66 prioceiling >= PTHREAD_MIN_PRIORITY)
67 (*mattr)->m_ceiling = prioceiling;
75 _pthread_mutex_getprioceiling(pthread_mutex_t *mutex,
81 *prioceiling = (*mutex)->m_prio;
86 _pthread_mutex_setprioceiling(pthread_mutex_t *mutex,
87 int prioceiling, int *old_ceiling)
93 else if (prioceiling > PTHREAD_MAX_PRIORITY ||
94 prioceiling < PTHREAD_MIN_PRIORITY)
98 * Because of the use of pthread_mutex_unlock(), the
99 * priority ceiling of a mutex cannot be changed
100 * while the mutex is held by another thread. It also,
101 * means that the the thread trying to change the
102 * priority ceiling must adhere to prio protection rules.
104 if ((ret = pthread_mutex_lock(mutex)) == 0) {
105 /* Return the old ceiling and set the new ceiling: */
106 *old_ceiling = (*mutex)->m_prio;
107 (*mutex)->m_prio = prioceiling;
109 /* Unlock the mutex: */
110 ret = pthread_mutex_unlock(mutex);