nptl/pthread_atfork.c

   1 /* Copyright (C) 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include "pthreadP.h"
  21 #include <fork.h>
  22
  23 /* This is defined by newer gcc version unique for each module.  */
  24 extern void *__dso_handle __attribute__ ((__weak__));
  25
  26
  27 /* Hide the symbol so that no definition but the one locally in the
  28    executable or DSO is used.  */
  29 int
  30 #ifndef __pthread_atfork
  31 /* Don't mark the compatibility function as hidden.  */
  32 attribute_hidden
  33 #endif
  34 __pthread_atfork (prepare, parent, child)
  35      void (*prepare) (void);
  36      void (*parent) (void);
  37      void (*child) (void);
  38 {
  39   return __register_atfork (prepare, parent, child,
  40                             &__dso_handle == NULL ? NULL : __dso_handle);
  41 }
  42 #ifndef __pthread_atfork
  43 extern int pthread_atfork (void (*prepare) (void), void (*parent) (void),
  44                            void (*child) (void)) attribute_hidden;
  45 strong_alias (__pthread_atfork, pthread_atfork)
  46 #endif