FreeBSD/Linux Kernel Cross Reference
sys/sys/_lock.h
1 /* $OpenBSD: _lock.h,v 1.4 2019/04/23 13:35:12 visa Exp $ */
2
3 /*-
4 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Berkeley Software Design Inc's name may not be used to endorse or
15 * promote products derived from this software without specific prior
16 * written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD: head/sys/sys/_lock.h 179025 2008-05-15 20:10:06Z attilio $
31 */
32
33 #ifndef _SYS__LOCK_H_
34 #define _SYS__LOCK_H_
35
36 #define LO_CLASSFLAGS 0x0000ffff /* Class specific flags. */
37 #define LO_INITIALIZED 0x00010000 /* Lock has been initialized. */
38 #define LO_WITNESS 0x00020000 /* Should witness monitor this lock. */
39 #define LO_QUIET 0x00040000 /* Don't log locking operations. */
40 #define LO_RECURSABLE 0x00080000 /* Lock may recurse. */
41 #define LO_SLEEPABLE 0x00100000 /* Lock may be held while sleeping. */
42 #define LO_UPGRADABLE 0x00200000 /* Lock may be upgraded/downgraded. */
43 #define LO_DUPOK 0x00400000 /* Don't check for duplicate acquires */
44 #define LO_IS_VNODE 0x00800000 /* Tell WITNESS about a VNODE lock */
45 #define LO_CLASSMASK 0x0f000000 /* Class index bitmask. */
46 #define LO_NOPROFILE 0x10000000 /* Don't profile this lock */
47 #define LO_NEW 0x20000000 /* Don't check for double-init */
48
49 #define LO_CLASSSHIFT 24
50
51 enum lock_class_index {
52 LO_CLASS_KERNEL_LOCK,
53 LO_CLASS_SCHED_LOCK,
54 LO_CLASS_MUTEX,
55 LO_CLASS_RWLOCK,
56 LO_CLASS_RRWLOCK
57 };
58
59 struct lock_object {
60 const struct lock_type *lo_type;
61 const char *lo_name; /* Individual lock name. */
62 struct witness *lo_witness; /* Data for witness. */
63 unsigned int lo_flags;
64 };
65
66 struct lock_type {
67 const char *lt_name;
68 };
69
70 #endif /* !_SYS__LOCK_H_ */
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