lib/sched_yield.c

   1 /* Schedule other threads to run.
   2    Copyright (C) 2019-2020 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
  18
  19 #include <config.h>
  20
  21 /* Specification.  */
  22 #include <sched.h>
  23
  24 #if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
  25 /* Use Windows threads.  */
  26
  27 # define WIN32_LEAN_AND_MEAN  /* avoid including junk */
  28 # include <windows.h>
  29
  30 int
  31 sched_yield (void)
  32 {
  33   Sleep (0);
  34   return 0;
  35 }
  36
  37 #else
  38 /* Provide a dummy implementation for single-threaded applications.  */
  39
  40 int
  41 sched_yield (void)
  42 {
  43   return 0;
  44 }
  45
  46 #endif