| | 1 | /* |
| | 2 | * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. The rights granted to you under the License |
| | 10 | * may not be used to create, or enable the creation or redistribution of, |
| | 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| | 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| | 13 | * terms of an Apple operating system software license agreement. |
| | 14 | * |
| | 15 | * Please obtain a copy of the License at |
| | 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| | 17 | * |
| | 18 | * The Original Code and all software distributed under the License are |
| | 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 23 | * Please see the License for the specific language governing rights and |
| | 24 | * limitations under the License. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | /* |
| | 29 | * @OSF_COPYRIGHT@ |
| | 30 | */ |
| | 31 | /* |
| | 32 | * Mach Operating System |
| | 33 | * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University |
| | 34 | * All Rights Reserved. |
| | 35 | * |
| | 36 | * Permission to use, copy, modify and distribute this software and its |
| | 37 | * documentation is hereby granted, provided that both the copyright |
| | 38 | * notice and this permission notice appear in all copies of the |
| | 39 | * software, derivative works or modified versions, and any portions |
| | 40 | * thereof, and that both notices appear in supporting documentation. |
| | 41 | * |
| | 42 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| | 43 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
| | 44 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
| | 45 | * |
| | 46 | * Carnegie Mellon requests users of this software to return to |
| | 47 | * |
| | 48 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
| | 49 | * School of Computer Science |
| | 50 | * Carnegie Mellon University |
| | 51 | * Pittsburgh PA 15213-3890 |
| | 52 | * |
| | 53 | * any improvements or extensions that they make and grant Carnegie Mellon |
| | 54 | * the rights to redistribute these changes. |
| | 55 | */ |
| | 56 | /* |
| | 57 | * File: kern/lock.h |
| | 58 | * Author: Avadis Tevanian, Jr., Michael Wayne Young |
| | 59 | * Date: 1985 |
| | 60 | * |
| | 61 | * Higher Level Locking primitives definitions |
| | 62 | */ |
| | 63 | |
| | 64 | #ifdef KERNEL_PRIVATE |
| | 65 | |
| | 66 | #ifndef _KERN_LOCK_H_ |
| | 67 | #define _KERN_LOCK_H_ |
| | 68 | |
| | 69 | #include <kern/simple_lock.h> |
| | 70 | #include <machine/lock.h> |
| | 71 | #include <sys/cdefs.h> |
| | 72 | |
| | 73 | __BEGIN_DECLS |
| | 74 | |
| | 75 | #ifndef MACH_KERNEL_PRIVATE |
| | 76 | |
| | 77 | typedef struct __mutex__ mutex_t; |
| | 78 | |
| | 79 | #else /* MACH_KERNEL_PRIVATE */ |
| | 80 | |
| | 81 | #define decl_mutex_data(class,name) class mutex_t name; |
| | 82 | #define mutex_addr(m) (&(m)) |
| | 83 | |
| | 84 | extern void mutex_init( |
| | 85 | mutex_t *mutex, |
| | 86 | unsigned short tag); |
| | 87 | |
| | 88 | #endif /* MACH_KERNEL_PRIVATE */ |
| | 89 | |
| | 90 | extern mutex_t *mutex_alloc( |
| | 91 | unsigned short tag); |
| | 92 | |
| | 93 | extern void mutex_free( |
| | 94 | mutex_t *mutex); |
| | 95 | |
| | 96 | extern void mutex_lock( |
| | 97 | mutex_t *mutex); |
| | 98 | |
| | 99 | extern void mutex_unlock( |
| | 100 | mutex_t *mutex); |
| | 101 | |
| | 102 | extern boolean_t mutex_try( |
| | 103 | mutex_t *mutex); |
| | 104 | |
| | 105 | extern void mutex_pause(void); |
| | 106 | |
| | 107 | #define MA_OWNED 0x01 |
| | 108 | #define MA_NOTOWNED 0x02 |
| | 109 | |
| | 110 | void _mutex_assert ( |
| | 111 | mutex_t *mutex, |
| | 112 | unsigned int what); |
| | 113 | |
| | 114 | #define mutex_assert(a, b) _mutex_assert(a, b) |
| | 115 | |
| | 116 | #ifndef MACH_KERNEL_PRIVATE |
| | 117 | |
| | 118 | typedef struct __lock__ lock_t; |
| | 119 | |
| | 120 | #else /* MACH_KERNEL_PRIVATE */ |
| | 121 | |
| | 122 | extern void lock_init( |
| | 123 | lock_t *lock, |
| | 124 | boolean_t can_sleep, |
| | 125 | unsigned short tag0, |
| | 126 | unsigned short tag1); |
| | 127 | |
| | 128 | #endif /* MACH_KERNEL_PRIVATE */ |
| | 129 | |
| | 130 | extern lock_t *lock_alloc( |
| | 131 | boolean_t can_sleep, |
| | 132 | unsigned short tag0, |
| | 133 | unsigned short tag1); |
| | 134 | |
| | 135 | extern void lock_free( |
| | 136 | lock_t *lock); |
| | 137 | |
| | 138 | extern void lock_write( |
| | 139 | lock_t *lock); |
| | 140 | |
| | 141 | extern void lock_read( |
| | 142 | lock_t *lock); |
| | 143 | |
| | 144 | extern void lock_done( |
| | 145 | lock_t *lock); |
| | 146 | |
| | 147 | extern void lock_write_to_read( |
| | 148 | lock_t *lock); |
| | 149 | |
| | 150 | #define lock_read_done(l) lock_done(l) |
| | 151 | #define lock_write_done(l) lock_done(l) |
| | 152 | |
| | 153 | extern boolean_t lock_read_to_write( |
| | 154 | lock_t *lock); |
| | 155 | |
| | 156 | |
| | 157 | /* Sleep, unlocking and then relocking a usimple_lock in the process */ |
| | 158 | extern wait_result_t thread_sleep_usimple_lock( |
| | 159 | event_t event, |
| | 160 | usimple_lock_t lock, |
| | 161 | wait_interrupt_t interruptible); |
| | 162 | |
| | 163 | /* Sleep, unlocking and then relocking a mutex in the process */ |
| | 164 | extern wait_result_t thread_sleep_mutex( |
| | 165 | event_t event, |
| | 166 | mutex_t *mutex, |
| | 167 | wait_interrupt_t interruptible); |
| | 168 | |
| | 169 | /* Sleep with a deadline, unlocking and then relocking a mutex in the process */ |
| | 170 | extern wait_result_t thread_sleep_mutex_deadline( |
| | 171 | event_t event, |
| | 172 | mutex_t *mutex, |
| | 173 | uint64_t deadline, |
| | 174 | wait_interrupt_t interruptible); |
| | 175 | |
| | 176 | /* Sleep, unlocking and then relocking a write lock in the process */ |
| | 177 | extern wait_result_t thread_sleep_lock_write( |
| | 178 | event_t event, |
| | 179 | lock_t *lock, |
| | 180 | wait_interrupt_t interruptible); |
| | 181 | __END_DECLS |
| | 182 | |
| | 183 | #ifdef MACH_KERNEL_PRIVATE |
| | 184 | |
| | 185 | extern wait_result_t thread_sleep_fast_usimple_lock( |
| | 186 | event_t event, |
| | 187 | simple_lock_t lock, |
| | 188 | wait_interrupt_t interruptible); |
| | 189 | #endif /* MACH_KERNEL_PRIVATE */ |
| | 190 | |
| | 191 | #endif /* _KERN_LOCK_H_ */ |
| | 192 | |
| | 193 | #endif /* KERNEL_PRIVATE */ |
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