1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2015 by Delphix. All rights reserved. 24 */ 25 26 #ifndef _SYS_ZRLOCK_H 27 #define _SYS_ZRLOCK_H 28 29 #include <sys/zfs_context.h> 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 typedef struct zrlock { 36 kmutex_t zr_mtx; 37 kcondvar_t zr_cv; 38 volatile int32_t zr_refcount; 39 #ifdef ZFS_DEBUG 40 kthread_t *zr_owner; 41 const char *zr_caller; 42 #endif 43 } zrlock_t; 44 45 extern void zrl_init(zrlock_t *); 46 extern void zrl_destroy(zrlock_t *); 47 #define zrl_add(_z) zrl_add_impl((_z), __func__) 48 extern void zrl_add_impl(zrlock_t *, const char *); 49 extern void zrl_remove(zrlock_t *); 50 extern int zrl_tryenter(zrlock_t *); 51 extern void zrl_exit(zrlock_t *); 52 extern int zrl_is_zero(zrlock_t *); 53 extern int zrl_is_locked(zrlock_t *); 54 #ifdef ZFS_DEBUG 55 extern kthread_t *zrl_owner(zrlock_t *); 56 #endif 57 58 #ifdef __cplusplus 59 } 60 #endif 61 62 #endif /* _SYS_ZRLOCK_H */ 63