/* * 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. * Copyright (c) 2015 by Delphix. 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 *); #define zrl_add(_z) zrl_add_impl((_z), __func__) extern void zrl_add_impl(zrlock_t *, const char *); 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 */ |