| 1 | /* $OpenBSD: semaphore.h,v 1.1 2017/10/15 23:40:33 guenther Exp $ */ |
| 2 | |
| 3 | /* semaphore.h: POSIX 1003.1b semaphores */ |
| 4 | |
| 5 | /*- |
| 6 | * Copyright (c) 1996, 1997 |
| 7 | * HD Associates, Inc. All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. All advertising materials mentioning features or use of this software |
| 18 | * must display the following acknowledgement: |
| 19 | * This product includes software developed by HD Associates, Inc |
| 20 | * 4. Neither the name of the author nor the names of any co-contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | */ |
| 36 | |
| 37 | #ifndef _SEMAPHORE_H_ |
| 38 | #define _SEMAPHORE_H_ |
| 39 | |
| 40 | #include <sys/cdefs.h> |
| 41 | |
| 42 | /* Opaque type definition. */ |
| 43 | struct __sem; |
| 44 | typedef struct __sem *sem_t; |
| 45 | struct timespec; |
| 46 | |
| 47 | #define SEM_FAILED ((sem_t *)0) |
| 48 | |
| 49 | __BEGIN_DECLS |
| 50 | int sem_init(sem_t *, int, unsigned int); |
| 51 | int sem_destroy(sem_t *); |
| 52 | sem_t *sem_open(const char *, int, ...); |
| 53 | int sem_close(sem_t *); |
| 54 | int sem_unlink(const char *); |
| 55 | int sem_wait(sem_t *); |
| 56 | int sem_timedwait(sem_t * __restrict, const struct timespec * __restrict); |
| 57 | int sem_trywait(sem_t *); |
| 58 | int sem_post(sem_t *); |
| 59 | int sem_getvalue(sem_t * __restrict, int * __restrict); |
| 60 | __END_DECLS |
| 61 | |
| 62 | #endif /* _SEMAPHORE_H_ */ |