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/*
* 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.
*
* $FreeBSD$
*/
#include "namespace.h"
#include <sys/param.h>
#include <errno.h>
#include <pthread.h>
#include "un-namespace.h"
#include "thr_private.h"
__weak_reference(_pthread_setschedparam, pthread_setschedparam);
/*
* Set a thread's scheduling parameters, this should be done
* in kernel, doing it in userland is no-op.
*/
int
_pthread_setschedparam(pthread_t pthread, int policy,
const struct sched_param *param)
{
struct pthread *curthread = _get_curthread();
int ret;
if (pthread == curthread) {
THR_LOCK(curthread);
if (curthread->attr.sched_policy == policy &&
(policy == SCHED_OTHER ||
curthread->attr.prio == param->sched_priority)) {
pthread->attr.prio = param->sched_priority;
THR_UNLOCK(curthread);
return (0);
}
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 &&
(policy == SCHED_OTHER ||
pthread->attr.prio == param->sched_priority)) {
pthread->attr.prio = param->sched_priority;
THR_THREAD_UNLOCK(curthread, pthread);
return (0);
}
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);
}
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