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- /* $NetBSD: semaphore.h,v 1.2 2003/01/21 12:27:11 kleink Exp $ */
-
- /*-
- * Copyright (c) 2003 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Christos Zoulas.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the NetBSD
- * Foundation, Inc. and its contributors.
- * 4. Neither the name of The NetBSD Foundation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
- #ifndef _SEMAPHORE_H_
- #define _SEMAPHORE_H_
-
- #include <pthread.h>
-
- /* POSIX 1003.1b semaphores */
-
- typedef unsigned int semid_t;
-
- struct pthread_queue_t;
-
- typedef struct {
- unsigned int usem_magic;
-
- semid_t usem_semid;
-
- /* Protects data below. */
- pthread_rwlock_t usem_interlock;
-
- struct pthread_queue_t *usem_waiters;
- unsigned int usem_count;
- } sem_t;
-
- #define SEM_FAILED ((sem_t *)0)
- #define SEM_VALUE_MAX (~0U)
-
- #include <sys/cdefs.h>
-
- __BEGIN_DECLS
- int sem_close(sem_t *);
- int sem_destroy(sem_t *);
- int sem_getvalue(sem_t * __restrict, int * __restrict);
- int sem_init(sem_t *, int, unsigned int);
- int sem_post(sem_t *);
- int sem_trywait(sem_t *);
- int sem_unlink(const char *);
- int sem_wait(sem_t *);
- sem_t *sem_open(const char *, int, ...);
- __END_DECLS
-
- #endif /* !_SEMAPHORE_H_ */
-