1 /* Schedule other threads to run. 2 Copyright (C) 2019-2021 Free Software Foundation, Inc. 3 4 This file is free software: you can redistribute it and/or modify 5 it under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 This file 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 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser 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 #elif defined __KLIBC__ 38 /* OS/2 kLIBC implementation */ 39 40 # define INCL_DOS 41 # include <os2.h> 42 43 int 44 sched_yield (void) /* */ 45 { 46 DosSleep (0); 47 return 0; 48 } 49 50 #else 51 /* Provide a dummy implementation for single-threaded applications. */ 52 53 int 54 sched_yield (void) /* */ 55 { 56 return 0; 57 } 58 59 #endif