1/* $NetBSD: semaphore.h,v 1.5 2016/04/24 19:48:29 dholland Exp $ */ 2 3/*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#ifndef _SEMAPHORE_H_ 33#define _SEMAPHORE_H_ 34 35/* POSIX 1003.1b semaphores */ 36 37struct _sem_st; 38typedef struct _sem_st *sem_t; 39 40#define SEM_FAILED ((sem_t *)0) 41 42#include <sys/semaphore.h> /* some kernel-only bits */ 43#include <sys/time.h> 44 45__BEGIN_DECLS 46int sem_close(sem_t *); 47int sem_destroy(sem_t *); 48int sem_getvalue(sem_t * __restrict, int * __restrict); 49int sem_init(sem_t *, int, unsigned int); 50int sem_post(sem_t *); 51int sem_timedwait(sem_t *, const struct timespec * __restrict); 52int sem_trywait(sem_t *); 53int sem_unlink(const char *); 54int sem_wait(sem_t *); 55sem_t *sem_open(const char *, int, ...); 56__END_DECLS 57 58#endif /* !_SEMAPHORE_H_ */ 59