1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 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 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#ifndef _SEMAPHORE_H 30#define _SEMAPHORE_H 31 32#include <sys/cdefs.h> 33 34__BEGIN_DECLS 35 36struct timespec; 37 38typedef struct { 39 unsigned int count; 40#ifdef __LP64__ 41 int __reserved[3]; 42#endif 43} sem_t; 44 45#define SEM_FAILED NULL 46 47int sem_destroy(sem_t*); 48int sem_getvalue(sem_t*, int*); 49int sem_init(sem_t*, int, unsigned int); 50int sem_post(sem_t*); 51int sem_timedwait(sem_t*, const struct timespec*); 52int sem_trywait(sem_t*); 53int sem_wait(sem_t*); 54 55/* These aren't actually implemented. */ 56sem_t* sem_open(const char*, int, ...); 57int sem_close(sem_t*); 58int sem_unlink(const char*); 59 60__END_DECLS 61 62#endif /* _SEMAPHORE_H */ 63