kc3-lang/gnulib/lib/call_once.c

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• Hash : 9eeae87d
  Author :
  Date : 2024-05-30T10:55:40
  

  call_once: Work around Cygwin 3.5.3 bug.
  
  * m4/call_once.m4 (gl_FUNC_CALL_ONCE): Require AC_CANONICAL_HOST.
  On Cygwin, set REPLACE_CALL_ONCE to 1.
  * lib/call_once.c (call_once): On Cygwin, use a cast, to avoid a
  compiler warning.
  * modules/call_once (Depends-on): Add pthread-once.
  * doc/posix-functions/call_once.texi: Mention the Cygwin bug.
  

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• lib/call_once.c

• /* ISO C 11 once-only initialization.
     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/>.  */
  
  /* Written by Bruno Haible <bruno@clisp.org>, 2005, 2019.
     Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h.  */
  
  #include <config.h>
  
  #include <threads.h>
  
  #include <errno.h>
  
  #if defined _WIN32 && ! defined __CYGWIN__
  /* Use Windows threads.  */
  
  # define WIN32_LEAN_AND_MEAN  /* avoid including junk */
  # include <windows.h>
  
  # include <stdlib.h>
  
  #else
  /* Use POSIX threads.  */
  
  # include <pthread.h>
  
  #endif
  
  #if defined _WIN32 && ! defined __CYGWIN__
  /* Use Windows threads.  */
  
  void
  call_once (once_flag *flagp, void (*func) (void))
  {
    glwthread_once (flagp, func);
  }
  
  #else
  /* Use POSIX threads.  */
  
  void
  call_once (once_flag *flagp, void (*func) (void))
  {
  # if defined __CYGWIN__
    /* Verify that once_flag and pthread_once_t are of the same size.  */
    struct _ { int v [sizeof (once_flag) == sizeof (pthread_once_t) ? 1 : -1]; };
    pthread_once ((pthread_once_t *) flagp, func);
  # else
    pthread_once (flagp, func);
  # endif
  }
  
  #endif
  

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