mutex.h revision 1.6.4.2
1 1.6.4.2 tls /* $NetBSD: mutex.h,v 1.6.4.2 2014/08/20 00:04:21 tls Exp $ */ 2 1.6.4.2 tls 3 1.6.4.2 tls /*- 4 1.6.4.2 tls * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.6.4.2 tls * All rights reserved. 6 1.6.4.2 tls * 7 1.6.4.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.6.4.2 tls * by Taylor R. Campbell. 9 1.6.4.2 tls * 10 1.6.4.2 tls * Redistribution and use in source and binary forms, with or without 11 1.6.4.2 tls * modification, are permitted provided that the following conditions 12 1.6.4.2 tls * are met: 13 1.6.4.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.6.4.2 tls * notice, this list of conditions and the following disclaimer. 15 1.6.4.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.6.4.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.6.4.2 tls * documentation and/or other materials provided with the distribution. 18 1.6.4.2 tls * 19 1.6.4.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.6.4.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.6.4.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.6.4.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.6.4.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.6.4.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.6.4.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.6.4.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.6.4.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.6.4.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.6.4.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.6.4.2 tls */ 31 1.6.4.2 tls 32 1.6.4.2 tls #ifndef _LINUX_MUTEX_H_ 33 1.6.4.2 tls #define _LINUX_MUTEX_H_ 34 1.6.4.2 tls 35 1.6.4.2 tls #include <sys/mutex.h> 36 1.6.4.2 tls 37 1.6.4.2 tls #include <lib/libkern/libkern.h> /* KASSERT */ 38 1.6.4.2 tls 39 1.6.4.2 tls struct mutex { 40 1.6.4.2 tls kmutex_t mtx_lock; 41 1.6.4.2 tls }; 42 1.6.4.2 tls 43 1.6.4.2 tls struct lock_class_key { 44 1.6.4.2 tls }; 45 1.6.4.2 tls 46 1.6.4.2 tls /* Name collision. Pooh. */ 47 1.6.4.2 tls static inline void 48 1.6.4.2 tls linux_mutex_init(struct mutex *mutex) 49 1.6.4.2 tls { 50 1.6.4.2 tls mutex_init(&mutex->mtx_lock, MUTEX_DEFAULT, IPL_NONE); 51 1.6.4.2 tls } 52 1.6.4.2 tls 53 1.6.4.2 tls /* Lockdep stuff. */ 54 1.6.4.2 tls static inline void 55 1.6.4.2 tls __mutex_init(struct mutex *mutex, const char *name __unused, 56 1.6.4.2 tls struct lock_class_key *key __unused) 57 1.6.4.2 tls { 58 1.6.4.2 tls linux_mutex_init(mutex); 59 1.6.4.2 tls } 60 1.6.4.2 tls 61 1.6.4.2 tls /* Another name collision. */ 62 1.6.4.2 tls static inline void 63 1.6.4.2 tls linux_mutex_destroy(struct mutex *mutex) 64 1.6.4.2 tls { 65 1.6.4.2 tls mutex_destroy(&mutex->mtx_lock); 66 1.6.4.2 tls } 67 1.6.4.2 tls 68 1.6.4.2 tls static inline void 69 1.6.4.2 tls mutex_lock(struct mutex *mutex) 70 1.6.4.2 tls { 71 1.6.4.2 tls mutex_enter(&mutex->mtx_lock); 72 1.6.4.2 tls } 73 1.6.4.2 tls 74 1.6.4.2 tls static inline int 75 1.6.4.2 tls mutex_lock_interruptible(struct mutex *mutex) 76 1.6.4.2 tls { 77 1.6.4.2 tls mutex_enter(&mutex->mtx_lock); /* XXX */ 78 1.6.4.2 tls return 0; 79 1.6.4.2 tls } 80 1.6.4.2 tls 81 1.6.4.2 tls static inline int 82 1.6.4.2 tls mutex_trylock(struct mutex *mutex) 83 1.6.4.2 tls { 84 1.6.4.2 tls return mutex_tryenter(&mutex->mtx_lock); 85 1.6.4.2 tls } 86 1.6.4.2 tls 87 1.6.4.2 tls static inline void 88 1.6.4.2 tls mutex_unlock(struct mutex *mutex) 89 1.6.4.2 tls { 90 1.6.4.2 tls mutex_exit(&mutex->mtx_lock); 91 1.6.4.2 tls } 92 1.6.4.2 tls 93 1.6.4.2 tls static inline bool 94 1.6.4.2 tls mutex_is_locked(struct mutex *mutex) 95 1.6.4.2 tls { 96 1.6.4.2 tls return mutex_owned(&mutex->mtx_lock); 97 1.6.4.2 tls } 98 1.6.4.2 tls 99 1.6.4.2 tls static inline void 100 1.6.4.2 tls mutex_lock_nest_lock(struct mutex *mutex, struct mutex *already) 101 1.6.4.2 tls { 102 1.6.4.2 tls 103 1.6.4.2 tls KASSERT(mutex_is_locked(already)); 104 1.6.4.2 tls mutex_lock(mutex); 105 1.6.4.2 tls } 106 1.6.4.2 tls 107 1.6.4.2 tls #define lockdep_assert_held(m) do {} while (0) 108 1.6.4.2 tls 109 1.6.4.2 tls #define SINGLE_DEPTH_NESTING 0 110 1.6.4.2 tls 111 1.6.4.2 tls static inline void 112 1.6.4.2 tls mutex_lock_nested(struct mutex *mutex, unsigned subclass __unused) 113 1.6.4.2 tls { 114 1.6.4.2 tls mutex_lock(mutex); 115 1.6.4.2 tls } 116 1.6.4.2 tls 117 1.6.4.2 tls #endif /* _LINUX_MUTEX_H_ */ 118
Indexes created Mon Sep 29 21:09:56 GMT 2025