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mutex.h revision 1.1.2.5 
      1 /*	$NetBSD: mutex.h,v 1.1.2.5 2013/07/24 02:37:00 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LINUX_MUTEX_H_
     33 #define _LINUX_MUTEX_H_
     34 
     35 #include <sys/mutex.h>
     36 
     37 struct mutex {
     38 	kmutex_t mtx_lock;
     39 };
     40 
     41 /* Name collision.  Pooh.  */
     42 static inline void
     43 linux_mutex_init(struct mutex *mutex)
     44 {
     45 	mutex_init(&mutex->mtx_lock, MUTEX_DEFAULT, IPL_NONE);
     46 }
     47 
     48 /* Another name collision.  */
     49 static inline void
     50 linux_mutex_destroy(struct mutex *mutex)
     51 {
     52 	mutex_destroy(&mutex->mtx_lock);
     53 }
     54 
     55 static inline void
     56 mutex_lock(struct mutex *mutex)
     57 {
     58 	mutex_enter(&mutex->mtx_lock);
     59 }
     60 
     61 static inline void
     62 mutex_lock_interruptible(struct mutex *mutex)
     63 {
     64 	mutex_enter(&mutex->mtx_lock); /* XXX */
     65 }
     66 
     67 static inline int
     68 mutex_trylock(struct mutex *mutex)
     69 {
     70 	return mutex_tryenter(&mutex->mtx_lock);
     71 }
     72 
     73 static inline void
     74 mutex_unlock(struct mutex *mutex)
     75 {
     76 	mutex_exit(&mutex->mtx_lock);
     77 }
     78 
     79 static inline bool
     80 mutex_is_locked(struct mutex *mutex)
     81 {
     82 	return mutex_owned(&mutex->mtx_lock);
     83 }
     84 
     85 #endif  /* _LINUX_MUTEX_H_ */
     86