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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "mt.h"
#include <stdlib.h>
void *
thr_get_storage(pthread_key_t *keyp, size_t size, void (*destructor)(void *))
{
extern mutex_t tsd_lock;
pthread_key_t key;
void *addr;
if ((key = *keyp) == 0) {
(void) mutex_lock(&tsd_lock);
if ((key = *keyp) == 0) {
if (pthread_key_create(keyp, destructor) != 0) {
(void) mutex_unlock(&tsd_lock);
return (NULL);
}
key = *keyp;
}
(void) mutex_unlock(&tsd_lock);
}
addr = pthread_getspecific(key);
if (addr == NULL && size != 0) {
addr = calloc(1, size);
if (addr != NULL && pthread_setspecific(key, addr) != 0) {
free(addr);
return (NULL);
}
}
return (addr);
}
/*
* sig_mutex_lock() and sig_mutex_unlock() are the same
* as mutex_lock() and mutex_unlock() except that all
* signals are deferred while the lock is held. Likewise
* for sig_rw_rdlock(), sig_rw_wrlock() and sig_rw_unlock().
*
* _sigoff() and _sigon() are consolidation-private
* interfaces in libc that defer and enable signals.
* Calls to these can nest but must be balanced, so
* nested calls to these functions work properly.
*/
void
sig_mutex_lock(mutex_t *mp)
{
_sigoff();
(void) mutex_lock(mp);
}
void
sig_mutex_unlock(mutex_t *mp)
{
(void) mutex_unlock(mp);
_sigon();
}
void
sig_rw_rdlock(rwlock_t *rwlp)
{
_sigoff();
(void) rw_rdlock(rwlp);
}
void
sig_rw_wrlock(rwlock_t *rwlp)
{
_sigoff();
(void) rw_wrlock(rwlp);
}
void
sig_rw_unlock(rwlock_t *rwlp)
{
(void) rw_unlock(rwlp);
_sigon();
}
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