1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef _SEMAPHORE_H
28#define	_SEMAPHORE_H
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#include <sys/feature_tests.h>
33
34#include <sys/types.h>
35#include <sys/fcntl.h>
36
37#ifdef	__cplusplus
38extern "C" {
39#endif
40
41typedef struct {
42	/* this structure must be the same as sema_t in <synch.h> */
43	uint32_t	sem_count;	/* semaphore count */
44	uint16_t	sem_type;
45	uint16_t	sem_magic;
46	upad64_t	sem_pad1[3];	/* reserved for a mutex_t */
47	upad64_t 	sem_pad2[2];	/* reserved for a cond_t */
48} sem_t;
49
50#define	SEM_FAILED	((sem_t *)(-1))
51
52/*
53 * function prototypes
54 */
55#if	defined(__STDC__)
56int	sem_init(sem_t *, int, unsigned int);
57int	sem_destroy(sem_t *);
58sem_t	*sem_open(const char *, int, ...);
59int	sem_close(sem_t *);
60int	sem_unlink(const char *);
61int	sem_wait(sem_t *);
62/*
63 * Inclusion of <time.h> breaks X/Open and POSIX namespace.
64 * The timespec structure while allowed in XPG6 and POSIX.1003d-1999,
65 * is not permitted in prior POSIX or X/Open specifications even
66 * though functions beginning with sem_* are allowed.
67 */
68#if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
69struct timespec;
70int	sem_timedwait(sem_t *_RESTRICT_KYWD,
71		const struct timespec *_RESTRICT_KYWD);
72int	sem_reltimedwait_np(sem_t *_RESTRICT_KYWD,
73		const struct timespec *_RESTRICT_KYWD);
74#endif	/* !defined(__XOPEN_OR_POSIX) || defined(_XPG6) ... */
75int	sem_trywait(sem_t *);
76int	sem_post(sem_t *);
77int	sem_getvalue(sem_t *_RESTRICT_KYWD, int *_RESTRICT_KYWD);
78#else
79int	sem_init();
80int	sem_destroy();
81sem_t	*sem_open();
82int	sem_close();
83int	sem_unlink();
84int	sem_wait();
85#if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
86int	sem_timedwait();
87int	sem_reltimedwait_np();
88#endif	/* #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) ... */
89int	sem_trywait();
90int	sem_post();
91int	sem_getvalue();
92#endif	/* __STDC__ */
93
94#ifdef	__cplusplus
95}
96#endif
97
98#endif	/* _SEMAPHORE_H */
99