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mutex.h revision 1.1.2.4 
      1 /*	$NetBSD: mutex.h,v 1.1.2.4 2013/07/24 02:10:15 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 static inline void
     49 mutex_lock(struct mutex *mutex)
     50 {
     51 	mutex_enter(&mutex->mtx_lock);
     52 }
     53 
     54 static inline void
     55 mutex_lock_interruptible(struct mutex *mutex)
     56 {
     57 	mutex_enter(&mutex->mtx_lock); /* XXX */
     58 }
     59 
     60 static inline int
     61 mutex_trylock(struct mutex *mutex)
     62 {
     63 	return mutex_tryenter(&mutex->mtx_lock);
     64 }
     65 
     66 static inline void
     67 mutex_unlock(struct mutex *mutex)
     68 {
     69 	mutex_exit(&mutex->mtx_lock);
     70 }
     71 
     72 static inline bool
     73 mutex_is_locked(struct mutex *mutex)
     74 {
     75 	return mutex_owned(&mutex->mtx_lock);
     76 }
     77 
     78 #endif  /* _LINUX_MUTEX_H_ */
     79