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/* Copyright (C) 2002 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, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdlib.h>
#include "fork.h"
int
__register_atfork (prepare, parent, child, dso_handle)
void (*prepare) (void);
void (*parent) (void);
void (*child) (void);
void *dso_handle;
{
struct fork_handler *new_prepare = NULL;
struct fork_handler *new_parent = NULL;
struct fork_handler *new_child = NULL;
if (prepare != NULL)
{
new_prepare = (struct fork_handler *) malloc (sizeof (*new_prepare));
if (new_prepare == NULL)
goto out1;
new_prepare->handler = prepare;
new_prepare->dso_handle = dso_handle;
}
if (parent != NULL)
{
new_parent = (struct fork_handler *) malloc (sizeof (*new_parent));
if (new_parent == NULL)
goto out2;
new_parent->handler = parent;
new_parent->dso_handle = dso_handle;
}
if (child != NULL)
{
new_child = (struct fork_handler *) malloc (sizeof (*new_child));
if (new_child == NULL)
{
free (new_parent);
out2:
free (new_prepare);
out1:
return errno;
}
new_child->handler = child;
new_child->dso_handle = dso_handle;
}
/* Get the lock to not conflict with running forks. */
__libc_lock_lock (__fork_block.lock);
/* Now that we have all the handlers allocate enqueue them. */
if (new_prepare != NULL)
list_add_tail (&new_prepare->list, &__fork_block.prepare_list);
if (new_parent != NULL)
list_add_tail (&new_parent->list, &__fork_block.parent_list);
if (new_child != NULL)
list_add_tail (&new_child->list, &__fork_block.child_list);
/* Release the lock. */
__libc_lock_unlock (__fork_block.lock);
return 0;
}
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