51369649b0
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2007 Stephan Uphoff <ups@FreeBSD.org>
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* 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. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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__RMLOCK_H_
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#define _SYS__RMLOCK_H_
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/*
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* Mostly reader/occasional writer lock.
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*/
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LIST_HEAD(rmpriolist,rm_priotracker);
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struct rm_queue {
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struct rm_queue *volatile rmq_next;
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struct rm_queue *volatile rmq_prev;
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};
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struct rmlock {
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struct lock_object lock_object;
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volatile cpuset_t rm_writecpus;
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LIST_HEAD(,rm_priotracker) rm_activeReaders;
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union {
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struct lock_object _rm_wlock_object;
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struct mtx _rm_lock_mtx;
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struct sx _rm_lock_sx;
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} _rm_lock;
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};
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#define rm_wlock_object _rm_lock._rm_wlock_object
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#define rm_lock_mtx _rm_lock._rm_lock_mtx
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#define rm_lock_sx _rm_lock._rm_lock_sx
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struct rm_priotracker {
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struct rm_queue rmp_cpuQueue; /* Must be first */
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struct rmlock *rmp_rmlock;
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struct thread *rmp_thread;
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int rmp_flags;
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LIST_ENTRY(rm_priotracker) rmp_qentry;
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};
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#endif /* !_SYS__RMLOCK_H_ */
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