1 /*- 2 * Copyright (c) 1996, 1997 3 * HD Associates, Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by HD Associates, Inc 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD: src/sys/posix4/semaphore.h,v 1.6 2000/01/20 07:55:42 jasone Exp $ 33 */ 34 35 #ifndef _SEMAPHORE_H_ 36 #define _SEMAPHORE_H_ 37 38 /* semaphore.h: POSIX 1003.1b semaphores */ 39 40 #include <sys/cdefs.h> 41 #include <sys/_timespec.h> 42 #include <machine/limits.h> 43 44 /* Opaque type definition. */ 45 struct sem; 46 typedef struct sem *sem_t; 47 48 #define SEM_FAILED ((sem_t *)0) 49 #define SEM_VALUE_MAX INT_MAX 50 51 __BEGIN_DECLS 52 int sem_init(sem_t *, int, unsigned int); 53 int sem_destroy(sem_t *); 54 sem_t *sem_open(const char *, int, ...); 55 int sem_close(sem_t *); 56 int sem_unlink(const char *); 57 int sem_wait(sem_t *); 58 int sem_trywait(sem_t *); 59 int sem_timedwait(sem_t * __restrict, const struct timespec * __restrict); 60 int sem_post(sem_t *); 61 int sem_getvalue(sem_t * __restrict, int * __restrict); 62 __END_DECLS 63 64 #endif /* !_SEMAPHORE_H_ */ 65