/*      $OpenBSD: rthread_mutex_prio.c,v 1.2 2014/06/23 00:43:15 guenther Exp $ */
/*
 * Copyright (c) 2011 Philip Guenther <guenther@openbsd.org>
 *
 * 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);
}