2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 #include "thr_private.h"
34 int _sched_yield(void);
36 __weak_reference(_sched_yield, sched_yield);
37 __weak_reference(_pthread_yield, pthread_yield);
42 struct pthread *curthread = _get_curthread();
44 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
45 return (__sys_sched_yield());
47 /* Reset the accumulated time slice value for the current thread: */
48 curthread->slice_usec = -1;
50 /* Schedule the next thread: */
51 _thr_sched_switch(curthread);
52 /* Always return no error. */
60 struct pthread *curthread = _get_curthread();
62 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
67 /* Reset the accumulated time slice value for the current thread: */
68 curthread->slice_usec = -1;
70 /* Schedule the next thread: */
71 _thr_sched_switch(curthread);