mirror of
https://https.git.savannah.gnu.org/git/gnulib.git
synced 2026-06-16 15:56:32 +00:00
Paul Eggert
250881c4f8
In lib/glthread/*.h, avoid including files if it’s easy, and if the files are not needed in the .h file to implement the module. * lib/glthread/cond.h: Include glthread/lock.h only if needed. * lib/glthread/lock.c, lib/glthread/once.c: Include <errno.h> here ... * lib/glthread/lock.h, lib/glthread/once.h: ... instead of here. * lib/glthread/lock.h: Include glthread/once.h only if needed. * lib/glthread/yield.h: Don’t include <errno.h>.
99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/* Yielding the processor to other threads and processes.
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Copyright (C) 2005-2026 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* This file contains a primitive for yielding the processor to other threads.
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extern void gl_thread_yield (void);
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*/
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#ifndef _GLTHREAD_YIELD_H
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#define _GLTHREAD_YIELD_H
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/* ========================================================================= */
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#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
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/* Use the ISO C threads library. */
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# include <threads.h>
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# ifdef __cplusplus
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extern "C" {
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# endif
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# define gl_thread_yield() \
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thrd_yield ()
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# ifdef __cplusplus
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}
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# endif
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#endif
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/* ========================================================================= */
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#if USE_POSIX_THREADS
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/* Use the POSIX threads library. */
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# include <sched.h>
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# ifdef __cplusplus
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extern "C" {
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# endif
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# define gl_thread_yield() \
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sched_yield ()
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# ifdef __cplusplus
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}
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# endif
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#endif
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/* ========================================================================= */
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#if USE_WINDOWS_THREADS
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# define WIN32_LEAN_AND_MEAN /* avoid including junk */
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# include <windows.h>
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# ifdef __cplusplus
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extern "C" {
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# endif
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# define gl_thread_yield() \
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Sleep (0)
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# ifdef __cplusplus
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}
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# endif
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#endif
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/* ========================================================================= */
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#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
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/* Provide dummy implementation if threads are not supported. */
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# define gl_thread_yield() 0
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#endif
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/* ========================================================================= */
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#endif /* _GLTHREAD_YIELD_H */
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