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 http://www.opensolaris.org/os/licensing. 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 */ 24 25 #ifndef _SYS_ZRLOCK_H 26 #define _SYS_ZRLOCK_H 27 28 #include <sys/zfs_context.h> 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 typedef struct zrlock { 35 kmutex_t zr_mtx; 36 volatile int32_t zr_refcount; 37 kcondvar_t zr_cv; 38 uint16_t zr_pad; 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 #ifdef ZFS_DEBUG 48 #define zrl_add(_z) zrl_add_debug((_z), __func__) 49 extern void zrl_add_debug(zrlock_t *, const char *); 50 #else 51 extern void zrl_add(zrlock_t *); 52 #endif 53 extern void zrl_remove(zrlock_t *); 54 extern int zrl_tryenter(zrlock_t *); 55 extern void zrl_exit(zrlock_t *); 56 extern int zrl_is_zero(zrlock_t *); 57 extern int zrl_is_locked(zrlock_t *); 58 #ifdef ZFS_DEBUG 59 extern kthread_t *zrl_owner(zrlock_t *); 60 #endif 61 62 #ifdef __cplusplus 63 } 64 #endif 65 66 #endif /* _SYS_ZRLOCK_H */ 67