semaphore.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SEMAPHORE_H
#define _SEMAPHORE_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/feature_tests.h>
#include <sys/types.h>
#include <sys/fcntl.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
/* this structure must be the same as sema_t in <synch.h> */
uint32_t sem_count; /* semaphore count */
uint16_t sem_type;
uint16_t sem_magic;
upad64_t sem_pad1[3]; /* reserved for a mutex_t */
upad64_t sem_pad2[2]; /* reserved for a cond_t */
} sem_t;
#define SEM_FAILED ((sem_t *)(-1))
/*
* function prototypes
*/
#if defined(__STDC__)
int sem_init(sem_t *, int, unsigned int);
int sem_destroy(sem_t *);
sem_t *sem_open(const char *, int, ...);
int sem_close(sem_t *);
int sem_unlink(const char *);
int sem_wait(sem_t *);
/*
* Inclusion of <time.h> breaks X/Open and POSIX namespace.
* The timespec structure while allowed in XPG6 and POSIX.1003d-1999,
* is not permitted in prior POSIX or X/Open specifications even
* though functions beginning with sem_* are allowed.
*/
#if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
struct timespec;
int sem_timedwait(sem_t *_RESTRICT_KYWD,
const struct timespec *_RESTRICT_KYWD);
int sem_reltimedwait_np(sem_t *_RESTRICT_KYWD,
const struct timespec *_RESTRICT_KYWD);
#endif /* !defined(__XOPEN_OR_POSIX) || defined(_XPG6) ... */
int sem_trywait(sem_t *);
int sem_post(sem_t *);
int sem_getvalue(sem_t *_RESTRICT_KYWD, int *_RESTRICT_KYWD);
#else
int sem_init();
int sem_destroy();
sem_t *sem_open();
int sem_close();
int sem_unlink();
int sem_wait();
#if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__)
int sem_timedwait();
int sem_reltimedwait_np();
#endif /* #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) ... */
int sem_trywait();
int sem_post();
int sem_getvalue();
#endif /* __STDC__ */
#ifdef __cplusplus
}
#endif
#endif /* _SEMAPHORE_H */