kc3-lang/gnulib/lib/glthread/yield.h

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• lib/glthread/yield.h

• /* 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 */
  

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