xref: /freebsd/lib/libthr/thread/thr_yield.c (revision bb535300dd871731b2542594a917bc2892479ca0)
1bb535300SJeff Roberson /*
2bb535300SJeff Roberson  * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
3bb535300SJeff Roberson  * All rights reserved.
4bb535300SJeff Roberson  *
5bb535300SJeff Roberson  * Redistribution and use in source and binary forms, with or without
6bb535300SJeff Roberson  * modification, are permitted provided that the following conditions
7bb535300SJeff Roberson  * are met:
8bb535300SJeff Roberson  * 1. Redistributions of source code must retain the above copyright
9bb535300SJeff Roberson  *    notice, this list of conditions and the following disclaimer.
10bb535300SJeff Roberson  * 2. Redistributions in binary form must reproduce the above copyright
11bb535300SJeff Roberson  *    notice, this list of conditions and the following disclaimer in the
12bb535300SJeff Roberson  *    documentation and/or other materials provided with the distribution.
13bb535300SJeff Roberson  * 3. All advertising materials mentioning features or use of this software
14bb535300SJeff Roberson  *    must display the following acknowledgement:
15bb535300SJeff Roberson  *	This product includes software developed by John Birrell.
16bb535300SJeff Roberson  * 4. Neither the name of the author nor the names of any co-contributors
17bb535300SJeff Roberson  *    may be used to endorse or promote products derived from this software
18bb535300SJeff Roberson  *    without specific prior written permission.
19bb535300SJeff Roberson  *
20bb535300SJeff Roberson  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21bb535300SJeff Roberson  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22bb535300SJeff Roberson  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23bb535300SJeff Roberson  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24bb535300SJeff Roberson  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25bb535300SJeff Roberson  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26bb535300SJeff Roberson  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27bb535300SJeff Roberson  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28bb535300SJeff Roberson  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29bb535300SJeff Roberson  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30bb535300SJeff Roberson  * SUCH DAMAGE.
31bb535300SJeff Roberson  *
32bb535300SJeff Roberson  * $FreeBSD$
33bb535300SJeff Roberson  */
34bb535300SJeff Roberson #include <pthread.h>
35bb535300SJeff Roberson #include "thr_private.h"
36bb535300SJeff Roberson 
37bb535300SJeff Roberson __weak_reference(_pthread_yield, pthread_yield);
38bb535300SJeff Roberson 
39bb535300SJeff Roberson /* Draft 4 yield */
40bb535300SJeff Roberson void
41bb535300SJeff Roberson _pthread_yield(void)
42bb535300SJeff Roberson {
43bb535300SJeff Roberson 
44bb535300SJeff Roberson 	sched_yield();
45bb535300SJeff Roberson }
46