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121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/* $NetBSD: mutex.h,v 1.7 2014/08/23 08:03:33 riastradh Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_MUTEX_H_
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#define _LINUX_MUTEX_H_
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#include <sys/mutex.h>
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#include <lib/libkern/libkern.h> /* KASSERT */
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#define __acquires(lock) /* XXX lockdep stuff */
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#define __releases(lock) /* XXX lockdep stuff */
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struct mutex {
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kmutex_t mtx_lock;
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};
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struct lock_class_key {
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};
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/* Name collision. Pooh. */
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static inline void
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linux_mutex_init(struct mutex *mutex)
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{
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mutex_init(&mutex->mtx_lock, MUTEX_DEFAULT, IPL_NONE);
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}
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/* Lockdep stuff. */
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static inline void
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__mutex_init(struct mutex *mutex, const char *name __unused,
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struct lock_class_key *key __unused)
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{
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linux_mutex_init(mutex);
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}
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/* Another name collision. */
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static inline void
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linux_mutex_destroy(struct mutex *mutex)
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{
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mutex_destroy(&mutex->mtx_lock);
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}
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static inline void
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mutex_lock(struct mutex *mutex)
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{
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mutex_enter(&mutex->mtx_lock);
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}
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static inline int
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mutex_lock_interruptible(struct mutex *mutex)
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{
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mutex_enter(&mutex->mtx_lock); /* XXX */
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return 0;
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}
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static inline int
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mutex_trylock(struct mutex *mutex)
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{
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return mutex_tryenter(&mutex->mtx_lock);
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}
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static inline void
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mutex_unlock(struct mutex *mutex)
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{
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mutex_exit(&mutex->mtx_lock);
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}
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static inline bool
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mutex_is_locked(struct mutex *mutex)
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{
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return mutex_owned(&mutex->mtx_lock);
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}
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static inline void
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mutex_lock_nest_lock(struct mutex *mutex, struct mutex *already)
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{
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KASSERT(mutex_is_locked(already));
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mutex_lock(mutex);
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}
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#define lockdep_assert_held(m) do {} while (0)
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#define SINGLE_DEPTH_NESTING 0
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static inline void
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mutex_lock_nested(struct mutex *mutex, unsigned subclass __unused)
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{
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mutex_lock(mutex);
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}
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#endif /* _LINUX_MUTEX_H_ */
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