The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/bsd/sys/semaphore.h

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    1 /*
    2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
    3  *
    4  * @APPLE_LICENSE_HEADER_START@
    5  * 
    6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
    7  * 
    8  * This file contains Original Code and/or Modifications of Original Code
    9  * as defined in and that are subject to the Apple Public Source License
   10  * Version 2.0 (the 'License'). You may not use this file except in
   11  * compliance with the License. Please obtain a copy of the License at
   12  * http://www.opensource.apple.com/apsl/ and read it before using this
   13  * file.
   14  * 
   15  * The Original Code and all software distributed under the License are
   16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
   17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
   18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
   19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
   20  * Please see the License for the specific language governing rights and
   21  * limitations under the License.
   22  * 
   23  * @APPLE_LICENSE_HEADER_END@
   24  */
   25 /*      @(#)semaphore.h 1.0     2/29/00         */
   26 
   27 
   28 
   29 /* 
   30  * semaphore.h - POSIX semaphores
   31  *
   32  * HISTORY
   33  * 29-Feb-00    A.Ramesh at Apple
   34  *      Created for Mac OS X
   35  */
   36 
   37 #ifndef _SYS_SEMAPHORE_H_
   38 #define _SYS_SEMAPHORE_H_
   39 
   40 typedef int sem_t;
   41 /* this should go in limits.h> */
   42 #define SEM_VALUE_MAX 32767
   43 #define SEM_FAILED -1
   44 
   45 #ifndef KERNEL
   46 #include <sys/cdefs.h>
   47 
   48 __BEGIN_DECLS
   49 int sem_close(sem_t *);
   50 int sem_destroy(sem_t *);
   51 int sem_getvalue(sem_t *, int *);
   52 int sem_init(sem_t *, int, unsigned int);
   53 sem_t * sem_open(const char *, int, ...);
   54 int sem_post(sem_t *);
   55 int sem_trywait(sem_t *);
   56 int sem_unlink(const char *);
   57 int sem_wait(sem_t *);
   58 __END_DECLS
   59 
   60 #endif /* KERNEL */
   61 
   62 #endif  /* _SYS_SEMAPHORE_H_ */

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