1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2015 by Delphix. All rights reserved. 25 */ 26 27 #ifndef _SYS_ZRLOCK_H 28 #define _SYS_ZRLOCK_H 29 30 #include <sys/zfs_context.h> 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 typedef struct zrlock { 37 kmutex_t zr_mtx; 38 kcondvar_t zr_cv; 39 volatile int32_t zr_refcount; 40 #ifdef ZFS_DEBUG 41 kthread_t *zr_owner; 42 const char *zr_caller; 43 #endif 44 } zrlock_t; 45 46 extern void zrl_init(zrlock_t *); 47 extern void zrl_destroy(zrlock_t *); 48 #define zrl_add(_z) zrl_add_impl((_z), __func__) 49 extern void zrl_add_impl(zrlock_t *, const char *); 50 extern void zrl_remove(zrlock_t *); 51 extern int zrl_tryenter(zrlock_t *); 52 extern void zrl_exit(zrlock_t *); 53 extern int zrl_is_zero(zrlock_t *); 54 extern int zrl_is_locked(zrlock_t *); 55 #ifdef ZFS_DEBUG 56 extern kthread_t *zrl_owner(zrlock_t *); 57 #endif 58 59 #ifdef __cplusplus 60 } 61 #endif 62 63 #endif /* _SYS_ZRLOCK_H */ 64