mutex.h revision 1.3
1 1.3 riastrad /* $NetBSD: mutex.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _LINUX_MUTEX_H_ 33 1.2 riastrad #define _LINUX_MUTEX_H_ 34 1.2 riastrad 35 1.2 riastrad #include <sys/mutex.h> 36 1.2 riastrad 37 1.3 riastrad #include <lib/libkern/libkern.h> /* KASSERT */ 38 1.3 riastrad 39 1.2 riastrad struct mutex { 40 1.2 riastrad kmutex_t mtx_lock; 41 1.2 riastrad }; 42 1.2 riastrad 43 1.2 riastrad /* Name collision. Pooh. */ 44 1.2 riastrad static inline void 45 1.2 riastrad linux_mutex_init(struct mutex *mutex) 46 1.2 riastrad { 47 1.2 riastrad mutex_init(&mutex->mtx_lock, MUTEX_DEFAULT, IPL_NONE); 48 1.2 riastrad } 49 1.2 riastrad 50 1.2 riastrad /* Another name collision. */ 51 1.2 riastrad static inline void 52 1.2 riastrad linux_mutex_destroy(struct mutex *mutex) 53 1.2 riastrad { 54 1.2 riastrad mutex_destroy(&mutex->mtx_lock); 55 1.2 riastrad } 56 1.2 riastrad 57 1.2 riastrad static inline void 58 1.2 riastrad mutex_lock(struct mutex *mutex) 59 1.2 riastrad { 60 1.2 riastrad mutex_enter(&mutex->mtx_lock); 61 1.2 riastrad } 62 1.2 riastrad 63 1.2 riastrad static inline int 64 1.2 riastrad mutex_lock_interruptible(struct mutex *mutex) 65 1.2 riastrad { 66 1.2 riastrad mutex_enter(&mutex->mtx_lock); /* XXX */ 67 1.2 riastrad return 0; 68 1.2 riastrad } 69 1.2 riastrad 70 1.2 riastrad static inline int 71 1.2 riastrad mutex_trylock(struct mutex *mutex) 72 1.2 riastrad { 73 1.2 riastrad return mutex_tryenter(&mutex->mtx_lock); 74 1.2 riastrad } 75 1.2 riastrad 76 1.2 riastrad static inline void 77 1.2 riastrad mutex_unlock(struct mutex *mutex) 78 1.2 riastrad { 79 1.2 riastrad mutex_exit(&mutex->mtx_lock); 80 1.2 riastrad } 81 1.2 riastrad 82 1.2 riastrad static inline bool 83 1.2 riastrad mutex_is_locked(struct mutex *mutex) 84 1.2 riastrad { 85 1.2 riastrad return mutex_owned(&mutex->mtx_lock); 86 1.2 riastrad } 87 1.2 riastrad 88 1.3 riastrad static inline void 89 1.3 riastrad mutex_lock_nest_lock(struct mutex *mutex, struct mutex *already) 90 1.3 riastrad { 91 1.3 riastrad 92 1.3 riastrad KASSERT(mutex_is_locked(already)); 93 1.3 riastrad mutex_lock(mutex); 94 1.3 riastrad } 95 1.3 riastrad 96 1.2 riastrad #endif /* _LINUX_MUTEX_H_ */ 97
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