1/*
2 * Copyright (c) 2000-2006 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/* @(#)semaphore.h 1.0 2/29/00 */
29
30
31
32/*
33 * semaphore.h - POSIX semaphores
34 *
35 * HISTORY
36 * 29-Feb-00 A.Ramesh at Apple
37 * Created for Mac OS X
38 */
39
40#ifndef _SYS_SEMAPHORE_H_
41#define _SYS_SEMAPHORE_H_
42
43typedef int sem_t;
44
45/* this should go in limits.h> */
46#define SEM_VALUE_MAX 32767
47#define SEM_FAILED ((sem_t *)-1)
48
49#ifndef KERNEL
50#include <sys/cdefs.h>
51
52__BEGIN_DECLS
53int sem_close(sem_t *);
54int sem_destroy(sem_t *) __deprecated;
55int sem_getvalue(sem_t * __restrict, int * __restrict) __deprecated;
56int sem_init(sem_t *, int, unsigned int) __deprecated;
57sem_t * sem_open(const char *, int, ...);
58int sem_post(sem_t *);
59int sem_trywait(sem_t *);
60int sem_unlink(const char *);
61int sem_wait(sem_t *) __DARWIN_ALIAS_C(sem_wait);
62__END_DECLS
63
64#else /* KERNEL */
65void psem_cache_init(void);
66#endif /* KERNEL */
67
68#endif /* _SYS_SEMAPHORE_H_ */
69