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	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
	137	#endif /* PRIVATE */
	138
	139	#endif /* _MACH_SEMAPHORE_H_ */