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
61extern  kern_return_t   semaphore_timedwait(semaphore_t semaphore,
62    mach_timespec_t wait_time);
63
64extern  kern_return_t   semaphore_timedwait_signal(semaphore_t wait_semaphore,
65    semaphore_t signal_semaphore,
66    mach_timespec_t wait_time);
67
68extern  kern_return_t   semaphore_wait_signal(semaphore_t wait_semaphore,
69    semaphore_t signal_semaphore);
70
71extern  kern_return_t   semaphore_signal_thread(semaphore_t semaphore,
72    thread_t thread);
73
74
75__END_DECLS
76
77
78#endif  /* _MACH_SEMAPHORE_H_ */