xref: /dflybsd-src/lib/libthread_xu/thread/thr_setschedparam.c (revision 940be950819fa932cd401a01f1182bf686a2e61e)
171b3fa15SDavid Xu /*
271b3fa15SDavid Xu  * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>.
371b3fa15SDavid Xu  * All rights reserved.
471b3fa15SDavid Xu  *
571b3fa15SDavid Xu  * Redistribution and use in source and binary forms, with or without
671b3fa15SDavid Xu  * modification, are permitted provided that the following conditions
771b3fa15SDavid Xu  * are met:
871b3fa15SDavid Xu  * 1. Redistributions of source code must retain the above copyright
971b3fa15SDavid Xu  *    notice, this list of conditions and the following disclaimer.
1071b3fa15SDavid Xu  * 2. Redistributions in binary form must reproduce the above copyright
1171b3fa15SDavid Xu  *    notice, this list of conditions and the following disclaimer in the
1271b3fa15SDavid Xu  *    documentation and/or other materials provided with the distribution.
1371b3fa15SDavid Xu  * 3. All advertising materials mentioning features or use of this software
1471b3fa15SDavid Xu  *    must display the following acknowledgement:
1571b3fa15SDavid Xu  *	This product includes software developed by Daniel Eischen.
1671b3fa15SDavid Xu  * 4. Neither the name of the author nor the names of any co-contributors
1771b3fa15SDavid Xu  *    may be used to endorse or promote products derived from this software
1871b3fa15SDavid Xu  *    without specific prior written permission.
1971b3fa15SDavid Xu  *
2071b3fa15SDavid Xu  * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND
2171b3fa15SDavid Xu  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2271b3fa15SDavid Xu  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2371b3fa15SDavid Xu  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
2471b3fa15SDavid Xu  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2571b3fa15SDavid Xu  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2671b3fa15SDavid Xu  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2771b3fa15SDavid Xu  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2871b3fa15SDavid Xu  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2971b3fa15SDavid Xu  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3071b3fa15SDavid Xu  * SUCH DAMAGE.
3171b3fa15SDavid Xu  *
3271b3fa15SDavid Xu  */
339e2ee207SJoerg Sonnenberger 
34fc71f871SDavid Xu #include "namespace.h"
359e2ee207SJoerg Sonnenberger #include <machine/tls.h>
3671b3fa15SDavid Xu #include <sys/param.h>
37fc71f871SDavid Xu #include <errno.h>
3871b3fa15SDavid Xu #include <pthread.h>
39fc71f871SDavid Xu #include "un-namespace.h"
40fc71f871SDavid Xu 
4171b3fa15SDavid Xu #include "thr_private.h"
4271b3fa15SDavid Xu 
4371b3fa15SDavid Xu int
_pthread_setschedparam(pthread_t pthread,int policy,const struct sched_param * param)4471b3fa15SDavid Xu _pthread_setschedparam(pthread_t pthread, int policy,
4571b3fa15SDavid Xu 	const struct sched_param *param)
4671b3fa15SDavid Xu {
47*940be950Szrj 	pthread_t curthread = tls_get_curthread();
4871b3fa15SDavid Xu 	int	ret = 0;
4971b3fa15SDavid Xu 
50a31d0705SMatthew Dillon 	if (pthread == curthread) {
51a31d0705SMatthew Dillon 		THR_LOCK(curthread);
52a31d0705SMatthew Dillon 		if (curthread->attr.sched_policy == policy &&
53a31d0705SMatthew Dillon 		     curthread->attr.prio == param->sched_priority) {
54a31d0705SMatthew Dillon 			THR_UNLOCK(curthread);
55a31d0705SMatthew Dillon 			return (0);
56a31d0705SMatthew Dillon 		}
57a31d0705SMatthew Dillon 		if (policy == SCHED_OTHER) {
58a31d0705SMatthew Dillon 			ret = _thr_set_sched_other_prio(curthread,
59a31d0705SMatthew Dillon 						param->sched_priority);
60a31d0705SMatthew Dillon 		} else {
61a31d0705SMatthew Dillon 			ret = _thr_setscheduler(curthread->tid, policy, param);
62a31d0705SMatthew Dillon 		}
63a31d0705SMatthew Dillon 		if (ret == -1)
64a31d0705SMatthew Dillon 			ret = errno;
65a31d0705SMatthew Dillon 		else {
66a31d0705SMatthew Dillon 			curthread->attr.sched_policy = policy;
67a31d0705SMatthew Dillon 			curthread->attr.prio = param->sched_priority;
68a31d0705SMatthew Dillon 		}
69a31d0705SMatthew Dillon 		THR_UNLOCK(curthread);
7071b3fa15SDavid Xu 	} else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
7171b3fa15SDavid Xu 		== 0) {
7271b3fa15SDavid Xu 		THR_THREAD_LOCK(curthread, pthread);
73a31d0705SMatthew Dillon 		if (pthread->attr.sched_policy == policy &&
74a31d0705SMatthew Dillon 		     pthread->attr.prio == param->sched_priority) {
7571b3fa15SDavid Xu 			THR_THREAD_UNLOCK(curthread, pthread);
76a31d0705SMatthew Dillon 			return (0);
7771b3fa15SDavid Xu 		}
78a31d0705SMatthew Dillon 		if (policy == SCHED_OTHER) {
79091bff16SMatthew Dillon 			ret = _thr_set_sched_other_prio(pthread,
80a31d0705SMatthew Dillon 						param->sched_priority);
81a31d0705SMatthew Dillon 		} else {
82091bff16SMatthew Dillon 			ret = _thr_setscheduler(pthread->tid, policy, param);
83a31d0705SMatthew Dillon 		}
84a31d0705SMatthew Dillon 		if (ret == -1)
85a31d0705SMatthew Dillon 			ret = errno;
8671b3fa15SDavid Xu 		else {
87a31d0705SMatthew Dillon 			pthread->attr.sched_policy = policy;
88a31d0705SMatthew Dillon 			pthread->attr.prio = param->sched_priority;
8971b3fa15SDavid Xu 		}
90a31d0705SMatthew Dillon 		THR_THREAD_UNLOCK(curthread, pthread);
9171b3fa15SDavid Xu 		_thr_ref_delete(curthread, pthread);
9271b3fa15SDavid Xu 	}
9371b3fa15SDavid Xu 	return (ret);
9471b3fa15SDavid Xu }
955a1048c8SDavid Xu 
965a1048c8SDavid Xu __strong_reference(_pthread_setschedparam, pthread_setschedparam);
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