/* Copyright (C) 2002, 2003, 2006, 2007 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.   The GNU C Library 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.   The GNU C Library 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 the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <lowlevellock.h>/* The fork generation counter, defined in libpthread.  */extern unsigned long int __fork_generation attribute_hidden;/* Pointer to the fork generation counter in the thread library.  */extern unsigned long int *__fork_generation_pointer attribute_hidden;/* Lock to protect allocation and deallocation of fork handlers.  */extern int __fork_lock attribute_hidden;/* Elements of the fork handler lists.  */struct fork_handler{  struct fork_handler *next;  void (*prepare_handler) (void);  void (*parent_handler) (void);  void (*child_handler) (void);  void *dso_handle;  unsigned int refcntr;  int need_signal;};/* The single linked list of all currently registered for handlers.  */extern struct fork_handler *__fork_handlers attribute_hidden;/* Function to call to unregister fork handlers.  */extern void __unregister_atfork (void *dso_handle) attribute_hidden;#define UNREGISTER_ATFORK(dso_handle) __unregister_atfork (dso_handle)/* C library side function to register new fork handlers.  */extern int __register_atfork (void (*__prepare) (void),			      void (*__parent) (void),			      void (*__child) (void),			      void *dso_handle);libc_hidden_proto (__register_atfork)