1 /* $NetBSD: mutex.h,v 1.2 2014/03/18 18:20:43 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 int 62 mutex_lock_interruptible(struct mutex *mutex) 63 { 64 mutex_enter(&mutex->mtx_lock); /* XXX */ 65 return 0; 66 } 67 68 static inline int 69 mutex_trylock(struct mutex *mutex) 70 { 71 return mutex_tryenter(&mutex->mtx_lock); 72 } 73 74 static inline void 75 mutex_unlock(struct mutex *mutex) 76 { 77 mutex_exit(&mutex->mtx_lock); 78 } 79 80 static inline bool 81 mutex_is_locked(struct mutex *mutex) 82 { 83 return mutex_owned(&mutex->mtx_lock); 84 } 85 86 #endif /* _LINUX_MUTEX_H_ */ 87