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/* $OpenBSD: rthread_mutex_prio.c,v 1.1 2011/12/22 00:42:07 guenther Exp $ */
/*
* Copyright (c) 2011 Philip Guenther <guenther@openbsd.org>
* All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <pthread.h>
#include "rthread.h"
int
pthread_mutex_getprioceiling(pthread_mutex_t *mutexp, int *prioceiling)
{
pthread_mutex_t mutex = *mutexp;
if (mutex->prioceiling == -1)
return (EINVAL);
*prioceiling = mutex->prioceiling;
return (0);
}
int
pthread_mutex_setprioceiling(pthread_mutex_t *mutexp, int prioceiling,
int *old_ceiling)
{
pthread_mutex_t mutex = *mutexp;
int ret;
if (mutex->prioceiling == -1 ||
prioceiling < PTHREAD_MIN_PRIORITY ||
prioceiling > PTHREAD_MAX_PRIORITY) {
ret = EINVAL;
} else if ((ret = pthread_mutex_lock(mutexp)) == 0) {
*old_ceiling = mutex->prioceiling;
mutex->prioceiling = prioceiling;
pthread_mutex_unlock(mutexp);
}
return (ret);
}
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