root / lab4 / .minix-src / include / semaphore.h @ 14
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| 1 | 13 | up20180614 | /* $NetBSD: semaphore.h,v 1.4 2012/03/08 21:59:28 joerg Exp $ */
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| 2 | |||
| 3 | /*-
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| 4 | * Copyright (c) 2003 The NetBSD Foundation, Inc.
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to The NetBSD Foundation
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| 8 | * by Christos Zoulas.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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| 29 | * POSSIBILITY OF SUCH DAMAGE.
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| 30 | */
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| 31 | |||
| 32 | #ifndef _SEMAPHORE_H_
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| 33 | #define _SEMAPHORE_H_
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| 34 | |||
| 35 | /* POSIX 1003.1b semaphores */
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| 36 | |||
| 37 | struct _sem_st;
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| 38 | typedef struct _sem_st *sem_t; |
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| 39 | |||
| 40 | #define SEM_FAILED ((sem_t *)0) |
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| 41 | #define SEM_VALUE_MAX (~0U) |
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| 42 | |||
| 43 | #include <sys/time.h> |
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| 44 | |||
| 45 | __BEGIN_DECLS |
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| 46 | int sem_close(sem_t *);
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| 47 | int sem_destroy(sem_t *);
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| 48 | int sem_getvalue(sem_t * __restrict, int * __restrict); |
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| 49 | int sem_init(sem_t *, int, unsigned int); |
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| 50 | int sem_post(sem_t *);
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| 51 | int sem_timedwait(sem_t *, const struct timespec * __restrict); |
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| 52 | int sem_trywait(sem_t *);
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| 53 | int sem_unlink(const char *); |
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| 54 | int sem_wait(sem_t *);
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| 55 | sem_t *sem_open(const char *, int, ...); |
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| 56 | __END_DECLS |
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| 57 | |||
| 58 | #endif /* !_SEMAPHORE_H_ */ |