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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "lint.h"
#include <mtlib.h>
#include <sys/types.h>
#include <synch.h>
#include <thread.h>
#include <pthread.h>
#include "libc.h"
/*
* fork1-safety.
* These three routines were used to make some libc interfaces fork1-safe.
* With the merge of libthread into libc, almost all libc internal-only
* locks are acquired via lmutex_lock() or lrw_rdlock()/lrw_wrlock(),
* which makes them automatically fork1-safe (as well as async-signal
* safe), so these functions are now used only for the locks that cannot
* be used with lmutex_lock or lrw_rdlock()/lrw_wrlock().
*/
extern void atexit_locks(void);
extern void atexit_unlocks(void);
extern void stdio_locks(void);
extern void stdio_unlocks(void);
extern void malloc_locks(void);
extern void malloc_unlocks(void);
static void
libc_prepare_atfork(void)
{
atexit_locks();
stdio_locks();
malloc_locks();
}
static void
libc_child_atfork(void)
{
malloc_unlocks();
stdio_unlocks();
atexit_unlocks();
}
static void
libc_parent_atfork(void)
{
malloc_unlocks();
stdio_unlocks();
atexit_unlocks();
}
/* called from libc_init() */
void
atfork_init(void)
{
(void) pthread_atfork(libc_prepare_atfork,
libc_parent_atfork, libc_child_atfork);
}
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