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glibc  2.9
fork.h
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00001 /* Copyright (C) 2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <list.h>
00021 #include <bits/libc-lock.h>
00022 #include <sysdep.h>
00023 
00024 struct fork_block
00025 {
00026   /* Lock to protect handling of fork handlers.  */
00027   __libc_lock_define (, lock);
00028 
00029   /* Lists of registered fork handlers.  */
00030   list_t prepare_list;
00031   list_t parent_list;
00032   list_t child_list;
00033 };
00034 
00035 extern struct fork_block __fork_block attribute_hidden;
00036 
00037 /* Elements of the fork handler lists.  */
00038 struct fork_handler
00039 {
00040   list_t list;
00041   void (*handler) (void);
00042   void *dso_handle;
00043 };
00044 
00045 
00046 /* Function to call to unregister fork handlers.  */
00047 extern void __unregister_atfork (void *dso_handle) attribute_hidden;
00048 #define UNREGISTER_ATFORK(dso_handle) __unregister_atfork (dso_handle)
00049 
00050 
00051 /* C library side function to register new fork handlers.  */
00052 extern int __register_atfork (void (*__prepare) (void),
00053                            void (*__parent) (void),
00054                            void (*__child) (void),
00055                            void *dso_handle);
00056 libc_hidden_proto (__register_atfork)
00057 
00058 #ifndef ARCH_FORK
00059 # define ARCH_FORK() INLINE_SYSCALL (fork, 0)
00060 #endif