1 /*
2 * sched_yield.c
3 *
4 * Description:
5 * POSIX thread functions that deal with thread scheduling.
6 *
7 * --------------------------------------------------------------------------
8 *
9 * Pthreads-win32 - POSIX Threads Library for Win32
10 * Copyright(C) 1998 John E. Bossom
11 * Copyright(C) 1999,2005 Pthreads-win32 contributors
12 *
13 * Contact Email: rpj@callisto.canberra.edu.au
14 *
15 * The current list of contributors is contained
16 * in the file CONTRIBUTORS included with the source
17 * code distribution. The list can also be seen at the
18 * following World Wide Web location:
19 * http://sources.redhat.com/pthreads-win32/contributors.html
20 *
21 * This library is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU Lesser General Public
23 * License as published by the Free Software Foundation; either
24 * version 2 of the License, or (at your option) any later version.
25 *
26 * This library is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29 * Lesser General Public License for more details.
30 *
31 * You should have received a copy of the GNU Lesser General Public
32 * License along with this library in the file COPYING.LIB;
33 * if not, write to the Free Software Foundation, Inc.,
34 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
35 */
36
37 #include "pthread.h"
38 #include "implement.h"
39 #include "sched.h"
40
41 int
sched_yield(void)42 sched_yield (void)
43 /*
44 * ------------------------------------------------------
45 * DOCPUBLIC
46 * This function indicates that the calling thread is
47 * willing to give up some time slices to other threads.
48 *
49 * PARAMETERS
50 * N/A
51 *
52 *
53 * DESCRIPTION
54 * This function indicates that the calling thread is
55 * willing to give up some time slices to other threads.
56 * NOTE: Since this is part of POSIX 1003.1b
57 * (realtime extensions), it is defined as returning
58 * -1 if an error occurs and sets errno to the actual
59 * error.
60 *
61 * RESULTS
62 * 0 successfully created semaphore,
63 * ENOSYS sched_yield not supported,
64 *
65 * ------------------------------------------------------
66 */
67 {
68 Sleep (0);
69
70 return 0;
71 }
72