diff options
Diffstat (limited to 'libc/nptl/sysdeps/unix/sysv/linux/fork.h')
-rw-r--r-- | libc/nptl/sysdeps/unix/sysv/linux/fork.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/libc/nptl/sysdeps/unix/sysv/linux/fork.h b/libc/nptl/sysdeps/unix/sysv/linux/fork.h new file mode 100644 index 000000000..6458977b9 --- /dev/null +++ b/libc/nptl/sysdeps/unix/sysv/linux/fork.h @@ -0,0 +1,57 @@ +/* Copyright (C) 2002, 2003, 2006 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 lll_lock_t __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) |