projects / mirror_zfs.git / blame
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|---|---|---|
| 572e2857 BB |
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 */ |