1/*
2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: releng/11.0/lib/libthr/thread/thr_setprio.c 297706 2016-04-08 11:15:26Z kib $");
32
33#include "namespace.h"
34#include <pthread.h>
35#include "un-namespace.h"
36
37#include "thr_private.h"
38
39__weak_reference(_pthread_setprio, pthread_setprio);
40
41int
42_pthread_setprio(pthread_t pthread, int prio)
43{
44	struct pthread	*curthread = _get_curthread();
45	struct sched_param	param;
46	int	ret;
47
48	param.sched_priority = prio;
49	if (pthread == curthread)
50		THR_LOCK(curthread);
51	else if ((ret = _thr_find_thread(curthread, pthread, /*include dead*/0)))
52		return (ret);
53	if (pthread->attr.sched_policy == SCHED_OTHER ||
54	    pthread->attr.prio == prio) {
55		pthread->attr.prio = prio;
56		ret = 0;
57	} else {
58		ret = _thr_setscheduler(pthread->tid,
59			pthread->attr.sched_policy, &param);
60		if (ret == -1)
61			ret = errno;
62		else
63			pthread->attr.prio = prio;
64	}
65	THR_THREAD_UNLOCK(curthread, pthread);
66	return (ret);
67}
68