pmt: revert 7f8090b

include/libgnulib/glthread/yield.h

@@ -1,100 +0,0 @@
-/* Yielding the processor to other threads and processes.
-   Copyright (C) 2005-2024 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 */