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-rw-r--r--tests/sched_yield.c59
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+/* Schedule other threads to run.
+ Copyright (C) 2019-2022 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019. */
+
+#include <config.h>
+
+/* Specification. */
+#include <sched.h>
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+/* Use Windows threads. */
+
+# define WIN32_LEAN_AND_MEAN /* avoid including junk */
+# include <windows.h>
+
+int
+sched_yield (void)
+{
+ Sleep (0);
+ return 0;
+}
+
+#elif defined __KLIBC__
+/* OS/2 kLIBC implementation */
+
+# define INCL_DOS
+# include <os2.h>
+
+int
+sched_yield (void)
+{
+ DosSleep (0);
+ return 0;
+}
+
+#else
+/* Provide a dummy implementation for single-threaded applications. */
+
+int
+sched_yield (void)
+{
+ return 0;
+}
+
+#endif