Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/posix4/semaphore.h
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1 #ifndef _SEMAPHORE_H_ 2 #define _SEMAPHORE_H_ 3 4 /* semaphore.h: POSIX 1003.1b semaphores */ 5 6 /*- 7 * Copyright (c) 1996, 1997 8 * HD Associates, Inc. All rights reserved. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by HD Associates, Inc 21 * 4. Neither the name of the author nor the names of any co-contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 */ 38 39 #include <sys/_posix.h> 40 41 #ifdef _P1003_1B_INCLUDE_MAYBES 42 #include <sys/types.h> 43 #include <fcntl.h> 44 #endif 45 46 typedef int sem_t; 47 48 #ifndef KERNEL 49 #include <sys/cdefs.h> 50 51 __BEGIN_DECLS 52 int sem_init __P((sem_t *, int, unsigned int)); 53 int sem_destroy __P((sem_t *)); 54 sem_t sem_open __P((const char *, int, ...)); 55 int sem_close __P((sem_t *)); 56 int sem_unlink __P((const char *)); 57 int sem_wait __P((sem_t *)); 58 int sem_trywait __P((sem_t *)); 59 int sem_post __P((sem_t *)); 60 int sem_getvalue __P((sem_t *, int *)); 61 __END_DECLS 62 63 #endif /* KERNEL */ 64 65 #endif /* _SEMAPHORE_H_ */
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