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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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
#ifndef _SYS_ZRLOCK_H
#define _SYS_ZRLOCK_H
#include <sys/zfs_context.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct zrlock {
kmutex_t zr_mtx;
volatile int32_t zr_refcount;
kcondvar_t zr_cv;
uint16_t zr_pad;
#ifdef ZFS_DEBUG
kthread_t *zr_owner;
const char *zr_caller;
#endif
} zrlock_t;
extern void zrl_init(zrlock_t *);
extern void zrl_destroy(zrlock_t *);
#ifdef ZFS_DEBUG
#define zrl_add(_z) zrl_add_debug((_z), __func__)
extern void zrl_add_debug(zrlock_t *, const char *);
#else
extern void zrl_add(zrlock_t *);
#endif
extern void zrl_remove(zrlock_t *);
extern int zrl_tryenter(zrlock_t *);
extern void zrl_exit(zrlock_t *);
extern int zrl_is_zero(zrlock_t *);
extern int zrl_is_locked(zrlock_t *);
#ifdef ZFS_DEBUG
extern kthread_t *zrl_owner(zrlock_t *);
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_ZRLOCK_H */
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