native_client_sdk/src/libraries/third_party/pthreads-win32/sched_yield.c

   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
  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 }