3af3df905f
This implements a subset of the LWP rwlock interface by wrapping the
equivalent POSIX thread interface. It is a superset of the features
needed by ztest.
The missing bits are {,_}rw_read_held() and {,_}rw_write_held().
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1970
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/*
|
|
* 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 2008 Sun Microsystems, Inc. All rights reserved.
|
|
* Copyright 2014 Zettabyte Software, LLC. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
#ifndef _LIBSPL_SYNCH_H
|
|
#define _LIBSPL_SYNCH_H
|
|
|
|
#ifndef __sun__
|
|
|
|
#include <assert.h>
|
|
#include <pthread.h>
|
|
|
|
/*
|
|
* Definitions of synchronization types.
|
|
*/
|
|
#define USYNC_THREAD 0x00 /* private to a process */
|
|
#define USYNC_PROCESS 0x01 /* shared by processes */
|
|
|
|
typedef pthread_rwlock_t rwlock_t;
|
|
|
|
#define DEFAULTRWLOCK PTHREAD_RWLOCK_INITIALIZER
|
|
|
|
static inline int
|
|
rwlock_init(rwlock_t *rwlp, int type, void *arg)
|
|
{
|
|
pthread_rwlockattr_t attr;
|
|
int err = 0;
|
|
|
|
VERIFY0(pthread_rwlockattr_init(&attr));
|
|
switch (type) {
|
|
case USYNC_THREAD:
|
|
VERIFY0(pthread_rwlockattr_setpshared(&attr,
|
|
PTHREAD_PROCESS_PRIVATE));
|
|
break;
|
|
case USYNC_PROCESS:
|
|
VERIFY0(pthread_rwlockattr_setpshared(&attr,
|
|
PTHREAD_PROCESS_SHARED));
|
|
break;
|
|
default:
|
|
VERIFY0(1);
|
|
}
|
|
|
|
err = pthread_rwlock_init(rwlp, &attr);
|
|
VERIFY0(pthread_rwlockattr_destroy(&attr));
|
|
|
|
return (err);
|
|
}
|
|
|
|
#define rwlock_destroy(x) pthread_rwlock_destroy((x))
|
|
#define rw_rdlock(x) pthread_rwlock_rdlock((x))
|
|
#define rw_wrlock(x) pthread_rwlock_wrlock((x))
|
|
#define rw_unlock(x) pthread_rwlock_unlock((x))
|
|
#define rw_tryrdlock(x) pthread_rwlock_tryrdlock((x))
|
|
#define rw_trywrlock(x) pthread_rwlock_trywrlock((x))
|
|
|
|
#endif /* __sun__ */
|
|
|
|
#endif
|