100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/* Yielding the processor to other threads and processes.
|
|
Copyright (C) 2005-2025 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 */
|