1 /* $OpenBSD: _lock.h,v 1.5 2024/06/03 12:46:59 claudio 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_MUTEX, 54 LO_CLASS_RWLOCK, 55 LO_CLASS_RRWLOCK 56 }; 57 58 struct lock_object { 59 const struct lock_type *lo_type; 60 const char *lo_name; /* Individual lock name. */ 61 struct witness *lo_witness; /* Data for witness. */ 62 unsigned int lo_flags; 63 }; 64 65 struct lock_type { 66 const char *lt_name; 67 }; 68 69 #endif /* !_SYS__LOCK_H_ */ 70