author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 01 Apr 2010 00:15:09 +0300 | |
branch | RCL_3 |
changeset 15 | 18da5738c9b6 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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/*- |
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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: src/sys/sys/_mutex.h,v 1.11 2004/01/25 01:59:26 rwatson Exp $ |
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*/ |
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|
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#ifndef _SYS__MUTEX_H_ |
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#define _SYS__MUTEX_H_ |
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|
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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 flags. */ |
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volatile u_int mtx_recurse; /* Number of recursive holds. */ |
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|
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#ifdef MUTEX_PROFILING |
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/* |
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* This does not result in variant structure sizes because |
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* MUTEX_PROFILING is in opt_global.h |
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*/ |
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u_int64_t mtx_acqtime; |
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const char *mtx_filename; |
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int mtx_lineno; |
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/* |
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* Fields relating to measuring contention on mutexes. |
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* holding must be accessed atomically since it's |
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* modified by threads that don't yet hold the mutex. |
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* locking is only modified and referenced while |
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* the mutex is held. |
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*/ |
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u_int mtx_contest_holding; |
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u_int mtx_contest_locking; |
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#endif |
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}; |
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#endif /* !_SYS__MUTEX_H_ */ |