/*
 * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Daniel Eischen.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include "namespace.h"
#include <machine/tls.h>
#include <sys/param.h>
#include <errno.h>
#include <pthread.h>
#include "un-namespace.h"

#include "thr_private.h"

int
_pthread_setschedparam(pthread_t pthread, int policy,
        const struct sched_param *param)
{
        pthread_t curthread = tls_get_curthread();
        int     ret = 0;

        if (pthread == curthread) {
                THR_LOCK(curthread);
                if (curthread->attr.sched_policy == policy &&
                     curthread->attr.prio == param->sched_priority) {
                        THR_UNLOCK(curthread);
                        return (0);
                }
                if (policy == SCHED_OTHER) {
                        ret = _thr_set_sched_other_prio(curthread,
                                                param->sched_priority);
                } else {
                        ret = _thr_setscheduler(curthread->tid, policy, param);
                }
                if (ret == -1)
                        ret = errno;
                else {
                        curthread->attr.sched_policy = policy;
                        curthread->attr.prio = param->sched_priority;
                }
                THR_UNLOCK(curthread);
        } else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
                == 0) {
                THR_THREAD_LOCK(curthread, pthread);
                if (pthread->attr.sched_policy == policy &&
                     pthread->attr.prio == param->sched_priority) {
                        THR_THREAD_UNLOCK(curthread, pthread);
                        return (0);
                }
                if (policy == SCHED_OTHER) {
                        ret = _thr_set_sched_other_prio(pthread,
                                                param->sched_priority);
                } else {
                        ret = _thr_setscheduler(pthread->tid, policy, param);
                }
                if (ret == -1)
                        ret = errno;
                else {
                        pthread->attr.sched_policy = policy;
                        pthread->attr.prio = param->sched_priority;
                }
                THR_THREAD_UNLOCK(curthread, pthread);
                _thr_ref_delete(curthread, pthread);
        }
        return (ret);
}

__strong_reference(_pthread_setschedparam, pthread_setschedparam);