1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef _SEMAPHORE_H
30#define _SEMAPHORE_H
31
32#include <sys/cdefs.h>
33
34__BEGIN_DECLS
35
36struct timespec;
37
38typedef struct {
39  unsigned int count;
40#ifdef __LP64__
41  int __reserved[3];
42#endif
43} sem_t;
44
45#define SEM_FAILED NULL
46
47int sem_destroy(sem_t*);
48int sem_getvalue(sem_t*, int*);
49int sem_init(sem_t*, int, unsigned int);
50int sem_post(sem_t*);
51int sem_timedwait(sem_t*, const struct timespec*);
52int sem_trywait(sem_t*);
53int sem_wait(sem_t*);
54
55/* These aren't actually implemented. */
56sem_t* sem_open(const char*, int, ...);
57int sem_close(sem_t*);
58int sem_unlink(const char*);
59
60__END_DECLS
61
62#endif /* _SEMAPHORE_H */
63