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 55extern kern_return_t semaphore_signal (semaphore_t semaphore); 56extern kern_return_t semaphore_signal_all (semaphore_t semaphore); 57 58extern kern_return_t semaphore_wait (semaphore_t semaphore); 59 60#ifdef KERNEL 61 62#ifdef __LP64__ 63 64#ifdef KERNEL_PRIVATE 65 66extern kern_return_t semaphore_timedwait (semaphore_t semaphore, 67 mach_timespec_t wait_time); 68 69#endif /* KERNEL_PRIVATE */ 70 71#else /* __LP64__ */ 72 73extern kern_return_t semaphore_timedwait (semaphore_t semaphore, 74 mach_timespec_t wait_time); 75 76#endif /* __LP64__ */ 77 78extern kern_return_t semaphore_wait_deadline (semaphore_t semaphore, 79 uint64_t deadline); 80extern kern_return_t semaphore_wait_noblock (semaphore_t semaphore); 81 82#ifdef XNU_KERNEL_PRIVATE 83 84extern kern_return_t semaphore_wait_signal (semaphore_t wait_semaphore, 85 semaphore_t signal_semaphore); 86 87extern kern_return_t semaphore_timedwait_signal(semaphore_t wait_semaphore, 88 semaphore_t signal_semaphore, 89 mach_timespec_t wait_time); 90 91extern kern_return_t semaphore_signal_thread (semaphore_t semaphore, 92 thread_t thread); 93 94#endif /* XNU_KERNEL_PRIVATE */ 95 96#else /* KERNEL */ 97 98extern kern_return_t semaphore_timedwait (semaphore_t semaphore, 99 mach_timespec_t wait_time); 100 101extern kern_return_t semaphore_timedwait_signal(semaphore_t wait_semaphore, 102 semaphore_t signal_semaphore, 103 mach_timespec_t wait_time); 104 105extern kern_return_t semaphore_wait_signal (semaphore_t wait_semaphore, 106 semaphore_t signal_semaphore); 107 108extern 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 */ 136 137#endif /* PRIVATE */ 138 139#endif /* _MACH_SEMAPHORE_H_ */ 140