c4e20cad00
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. 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.
92 lines
3.4 KiB
C
92 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2000 Jake Burkholder <jake@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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*
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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_CONDVAR_H_
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#define _SYS_CONDVAR_H_
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#ifndef LOCORE
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#include <sys/queue.h>
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struct lock_object;
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struct thread;
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TAILQ_HEAD(cv_waitq, thread);
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/*
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* Condition variable. The waiters count is protected by the mutex that
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* protects the condition; that is, the mutex that is passed to cv_wait*()
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* and is held across calls to cv_signal() and cv_broadcast(). It is an
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* optimization to avoid looking up the sleep queue if there are no waiters.
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*/
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struct cv {
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const char *cv_description;
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int cv_waiters;
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};
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#ifdef _KERNEL
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void cv_init(struct cv *cvp, const char *desc);
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void cv_destroy(struct cv *cvp);
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void _cv_wait(struct cv *cvp, struct lock_object *lock);
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void _cv_wait_unlock(struct cv *cvp, struct lock_object *lock);
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int _cv_wait_sig(struct cv *cvp, struct lock_object *lock);
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int _cv_timedwait_sbt(struct cv *cvp, struct lock_object *lock,
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sbintime_t sbt, sbintime_t pr, int flags);
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int _cv_timedwait_sig_sbt(struct cv *cvp, struct lock_object *lock,
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sbintime_t sbt, sbintime_t pr, int flags);
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void cv_signal(struct cv *cvp);
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void cv_broadcastpri(struct cv *cvp, int pri);
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#define cv_wait(cvp, lock) \
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_cv_wait((cvp), &(lock)->lock_object)
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#define cv_wait_unlock(cvp, lock) \
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_cv_wait_unlock((cvp), &(lock)->lock_object)
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#define cv_wait_sig(cvp, lock) \
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_cv_wait_sig((cvp), &(lock)->lock_object)
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#define cv_timedwait(cvp, lock, timo) \
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_cv_timedwait_sbt((cvp), &(lock)->lock_object, \
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tick_sbt * (timo), 0, C_HARDCLOCK)
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#define cv_timedwait_sbt(cvp, lock, sbt, pr, flags) \
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_cv_timedwait_sbt((cvp), &(lock)->lock_object, (sbt), (pr), (flags))
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#define cv_timedwait_sig(cvp, lock, timo) \
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_cv_timedwait_sig_sbt((cvp), &(lock)->lock_object, \
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tick_sbt * (timo), 0, C_HARDCLOCK)
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#define cv_timedwait_sig_sbt(cvp, lock, sbt, pr, flags) \
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_cv_timedwait_sig_sbt((cvp), &(lock)->lock_object, (sbt), (pr), (flags))
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#define cv_broadcast(cvp) cv_broadcastpri(cvp, 0)
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#define cv_wmesg(cvp) ((cvp)->cv_description)
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#endif /* _KERNEL */
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#endif /* !LOCORE */
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#endif /* _SYS_CONDVAR_H_ */
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