1 /*- 2 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Berkeley Software Design Inc's name may not be used to endorse or 13 * promote products derived from this software without specific prior 14 * written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _SYS__LOCK_H_ 32 #define _SYS__LOCK_H_ 33 34 struct lock_profile_object { 35 /* 36 * This does not result in variant structure sizes because 37 * MUTEX_PROFILING is in opt_global.h 38 */ 39 u_int64_t lpo_acqtime; 40 u_int64_t lpo_waittime; 41 const char *lpo_filename; 42 u_int lpo_namehash; 43 int lpo_lineno; 44 const char *lpo_type; 45 /* 46 * Fields relating to measuring contention on mutexes. 47 * holding must be accessed atomically since it's 48 * modified by threads that don't yet hold the mutex. 49 * locking is only modified and referenced while 50 * the mutex is held. 51 */ 52 u_int lpo_contest_holding; 53 u_int lpo_contest_locking; 54 }; 55 56 struct lock_object { 57 const char *lo_name; /* Individual lock name. */ 58 const char *lo_type; /* General lock type. */ 59 u_int lo_flags; 60 #ifdef LOCK_PROFILING 61 struct lock_profile_object lo_profile_obj; 62 #endif 63 union { /* Data for witness. */ 64 STAILQ_ENTRY(lock_object) lod_list; 65 struct witness *lod_witness; 66 } lo_witness_data; 67 }; 68 69 #endif /* !_SYS__LOCK_H_ */ 70