1 files changed, 100 insertions, 0 deletions
diff --git a/gnulib-tests/glthread/yield.h b/gnulib-tests/glthread/yield.h
new file mode 100644
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--- /dev/null
+++ b/gnulib-tests/glthread/yield.h
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+/* Yielding the processor to other threads and processes.
+   Copyright (C) 2005-2023 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/>.  */
+
+/* This file contains a primitive for yielding the processor to other threads.
+     extern void gl_thread_yield (void);
+ */
+
+#ifndef _GLTHREAD_YIELD_H
+#define _GLTHREAD_YIELD_H
+
+#include <errno.h>
+
+/* ========================================================================= */
+
+#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+/* Use the ISO C threads library.  */
+
+# include <threads.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# define gl_thread_yield() \
+    thrd_yield ()
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS
+
+/* Use the POSIX threads library.  */
+
+# include <sched.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# define gl_thread_yield() \
+    sched_yield ()
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WINDOWS_THREADS
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# define gl_thread_yield() \
+    Sleep (0)
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
+
+/* Provide dummy implementation if threads are not supported.  */
+
+# define gl_thread_yield() 0
+
+#endif
+
+/* ========================================================================= */
+
+#endif /* _GLTHREAD_YIELD_H */