1 /* 2 * Copyright (c) 2000-2008 Apple 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 #ifndef _MACH_SEMAPHORE_H_ 30 #define _MACH_SEMAPHORE_H_ 31 32 #include <mach/port.h> 33 #include <mach/mach_types.h> 34 #include <mach/kern_return.h> 35 #include <mach/sync_policy.h> 36 37 /* 38 * Forward Declarations 39 * 40 * The semaphore creation and deallocation routines are 41 * defined with the Mach task APIs in <mach/task.h>. 42 * 43 * kern_return_t semaphore_create(task_t task, 44 * semaphore_t *new_semaphore, 45 * sync_policy_t policy, 46 * int value); 47 * 48 * kern_return_t semaphore_destroy(task_t task, 49 * semaphore_t semaphore); 50 */ 51 52 #include <sys/cdefs.h> 53 __BEGIN_DECLS 54 55 extern kern_return_t semaphore_signal(semaphore_t semaphore); 56 extern kern_return_t semaphore_signal_all(semaphore_t semaphore); 57 58 extern kern_return_t semaphore_wait(semaphore_t semaphore); 59 60 #ifdef KERNEL 61 62 #ifdef __LP64__ 63 64 #ifdef KERNEL_PRIVATE 65 66 extern kern_return_t semaphore_timedwait(semaphore_t semaphore, 67 mach_timespec_t wait_time); 68 69 #endif /* KERNEL_PRIVATE */ 70 71 #else /* __LP64__ */ 72 73 extern kern_return_t semaphore_timedwait(semaphore_t semaphore, 74 mach_timespec_t wait_time); 75 76 #endif /* __LP64__ */ 77 78 extern kern_return_t semaphore_wait_deadline(semaphore_t semaphore, 79 uint64_t deadline); 80 extern kern_return_t semaphore_wait_noblock(semaphore_t semaphore); 81 82 #ifdef XNU_KERNEL_PRIVATE 83 84 extern kern_return_t semaphore_wait_signal(semaphore_t wait_semaphore, 85 semaphore_t signal_semaphore); 86 87 extern kern_return_t semaphore_timedwait_signal(semaphore_t wait_semaphore, 88 semaphore_t signal_semaphore, 89 mach_timespec_t wait_time); 90 91 extern kern_return_t semaphore_signal_thread(semaphore_t semaphore, 92 thread_t thread); 93 94 #endif /* XNU_KERNEL_PRIVATE */ 95 96 #else /* KERNEL */ 97 98 extern kern_return_t semaphore_timedwait(semaphore_t semaphore, 99 mach_timespec_t wait_time); 100 101 extern kern_return_t semaphore_timedwait_signal(semaphore_t wait_semaphore, 102 semaphore_t signal_semaphore, 103 mach_timespec_t wait_time); 104 105 extern kern_return_t semaphore_wait_signal(semaphore_t wait_semaphore, 106 semaphore_t signal_semaphore); 107 108 extern kern_return_t semaphore_signal_thread(semaphore_t semaphore, 109 thread_t thread); 110 111 #endif /* KERNEL */ 112 113 __END_DECLS 114 115 #ifdef PRIVATE 116 117 #define SEMAPHORE_OPTION_NONE 0x00000000 118 119 #define SEMAPHORE_SIGNAL 0x00000001 120 #define SEMAPHORE_WAIT 0x00000002 121 #define SEMAPHORE_WAIT_ON_SIGNAL 0x00000008 122 123 #define SEMAPHORE_SIGNAL_TIMEOUT 0x00000010 124 #define SEMAPHORE_SIGNAL_ALL 0x00000020 125 #define SEMAPHORE_SIGNAL_INTERRUPT 0x00000040 /* libmach implements */ 126 #define SEMAPHORE_SIGNAL_PREPOST 0x00000080 127 128 #define SEMAPHORE_WAIT_TIMEOUT 0x00000100 129 #define SEMAPHORE_WAIT_INTERRUPT 0x00000400 /* libmach implements */ 130 131 #define SEMAPHORE_TIMEOUT_NOBLOCK 0x00100000 132 #define SEMAPHORE_TIMEOUT_RELATIVE 0x00200000 133 134 #define SEMAPHORE_USE_SAVED_RESULT 0x01000000 /* internal use only */ 135 #define SEMAPHORE_SIGNAL_RELEASE 0x02000000 /* internal use only */ 136 #define SEMAPHORE_THREAD_HANDOFF 0x04000000 137 138 #endif /* PRIVATE */ 139 140 #endif /* _MACH_SEMAPHORE_H_ */ 141