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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 */ |