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.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
25 __register_atfork (prepare, parent, child, dso_handle)
26 void (*prepare) (void);
27 void (*parent) (void);
31 struct fork_handler *new_prepare = NULL;
32 struct fork_handler *new_parent = NULL;
33 struct fork_handler *new_child = NULL;
37 new_prepare = (struct fork_handler *) malloc (sizeof (*new_prepare));
38 if (new_prepare == NULL)
41 new_prepare->handler = prepare;
42 new_prepare->dso_handle = dso_handle;
47 new_parent = (struct fork_handler *) malloc (sizeof (*new_parent));
48 if (new_parent == NULL)
51 new_parent->handler = parent;
52 new_parent->dso_handle = dso_handle;
57 new_child = (struct fork_handler *) malloc (sizeof (*new_child));
58 if (new_child == NULL)
67 new_child->handler = child;
68 new_child->dso_handle = dso_handle;
71 /* Get the lock to not conflict with running forks. */
72 __libc_lock_lock (__fork_block.lock);
74 /* Now that we have all the handlers allocate enqueue them. */
75 if (new_prepare != NULL)
76 list_add_tail (&new_prepare->list, &__fork_block.prepare_list);
77 if (new_parent != NULL)
78 list_add_tail (&new_parent->list, &__fork_block.parent_list);
79 if (new_child != NULL)
80 list_add_tail (&new_child->list, &__fork_block.child_list);
82 /* Release the lock. */
83 __libc_lock_unlock (__fork_block.lock);