b784ffe91a
release times. Measurements are made and stored in nanoseconds but presented in microseconds, which should be sufficient for the locks for which we actually want this (those that are held long and / or often). Also, rename some variables and structure members to unit-agnostic names.
52 lines
2.1 KiB
C
52 lines
2.1 KiB
C
/*-
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* Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Berkeley Software Design Inc's name may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_MUTEX_TYPES_H_
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#define _SYS_MUTEX_TYPES_H_
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/*
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* Sleep/spin mutex
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*/
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struct mtx {
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struct lock_object mtx_object; /* Common lock properties. */
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volatile uintptr_t mtx_lock; /* owner (and state for sleep locks) */
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volatile u_int mtx_recurse; /* number of recursive holds */
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TAILQ_HEAD(, thread) mtx_blocked; /* threads blocked on this lock */
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LIST_ENTRY(mtx) mtx_contested; /* list of all contested locks */
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/* #ifdef MUTEX_PROFILING */
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u_int64_t acqtime;
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const char *file;
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int line;
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/* #endif */
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};
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#endif /* !_SYS_MUTEX_TYPES_H_ */
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