mutex.h revision 1.6.4.3
1 1.6.4.2 tls /* $NetBSD: mutex.h,v 1.6.4.3 2017/12/03 11:37:59 jdolecek 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 1.6.4.3 jdolecek #define __acquires(lock) /* XXX lockdep stuff */ 40 1.6.4.3 jdolecek #define __releases(lock) /* XXX lockdep stuff */ 41 1.6.4.3 jdolecek 42 1.6.4.2 tls struct mutex { 43 1.6.4.2 tls kmutex_t mtx_lock; 44 1.6.4.2 tls }; 45 1.6.4.2 tls 46 1.6.4.2 tls struct lock_class_key { 47 1.6.4.2 tls }; 48 1.6.4.2 tls 49 1.6.4.2 tls /* Name collision. Pooh. */ 50 1.6.4.2 tls static inline void 51 1.6.4.2 tls linux_mutex_init(struct mutex *mutex) 52 1.6.4.2 tls { 53 1.6.4.2 tls mutex_init(&mutex->mtx_lock, MUTEX_DEFAULT, IPL_NONE); 54 1.6.4.2 tls } 55 1.6.4.2 tls 56 1.6.4.2 tls /* Lockdep stuff. */ 57 1.6.4.2 tls static inline void 58 1.6.4.2 tls __mutex_init(struct mutex *mutex, const char *name __unused, 59 1.6.4.2 tls struct lock_class_key *key __unused) 60 1.6.4.2 tls { 61 1.6.4.2 tls linux_mutex_init(mutex); 62 1.6.4.2 tls } 63 1.6.4.2 tls 64 1.6.4.2 tls /* Another name collision. */ 65 1.6.4.2 tls static inline void 66 1.6.4.2 tls linux_mutex_destroy(struct mutex *mutex) 67 1.6.4.2 tls { 68 1.6.4.2 tls mutex_destroy(&mutex->mtx_lock); 69 1.6.4.2 tls } 70 1.6.4.2 tls 71 1.6.4.2 tls static inline void 72 1.6.4.2 tls mutex_lock(struct mutex *mutex) 73 1.6.4.2 tls { 74 1.6.4.2 tls mutex_enter(&mutex->mtx_lock); 75 1.6.4.2 tls } 76 1.6.4.2 tls 77 1.6.4.2 tls static inline int 78 1.6.4.2 tls mutex_lock_interruptible(struct mutex *mutex) 79 1.6.4.2 tls { 80 1.6.4.2 tls mutex_enter(&mutex->mtx_lock); /* XXX */ 81 1.6.4.2 tls return 0; 82 1.6.4.2 tls } 83 1.6.4.2 tls 84 1.6.4.2 tls static inline int 85 1.6.4.2 tls mutex_trylock(struct mutex *mutex) 86 1.6.4.2 tls { 87 1.6.4.2 tls return mutex_tryenter(&mutex->mtx_lock); 88 1.6.4.2 tls } 89 1.6.4.2 tls 90 1.6.4.2 tls static inline void 91 1.6.4.2 tls mutex_unlock(struct mutex *mutex) 92 1.6.4.2 tls { 93 1.6.4.2 tls mutex_exit(&mutex->mtx_lock); 94 1.6.4.2 tls } 95 1.6.4.2 tls 96 1.6.4.2 tls static inline bool 97 1.6.4.2 tls mutex_is_locked(struct mutex *mutex) 98 1.6.4.2 tls { 99 1.6.4.2 tls return mutex_owned(&mutex->mtx_lock); 100 1.6.4.2 tls } 101 1.6.4.2 tls 102 1.6.4.2 tls static inline void 103 1.6.4.2 tls mutex_lock_nest_lock(struct mutex *mutex, struct mutex *already) 104 1.6.4.2 tls { 105 1.6.4.2 tls 106 1.6.4.2 tls KASSERT(mutex_is_locked(already)); 107 1.6.4.2 tls mutex_lock(mutex); 108 1.6.4.2 tls } 109 1.6.4.2 tls 110 1.6.4.2 tls #define lockdep_assert_held(m) do {} while (0) 111 1.6.4.2 tls 112 1.6.4.2 tls #define SINGLE_DEPTH_NESTING 0 113 1.6.4.2 tls 114 1.6.4.2 tls static inline void 115 1.6.4.2 tls mutex_lock_nested(struct mutex *mutex, unsigned subclass __unused) 116 1.6.4.2 tls { 117 1.6.4.2 tls mutex_lock(mutex); 118 1.6.4.2 tls } 119 1.6.4.2 tls 120 1.6.4.2 tls #endif /* _LINUX_MUTEX_H_ */ 121
Indexes created Mon Sep 29 21:09:56 GMT 2025