bsd/sys/semaphore.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*      @(#)semaphore.h 1.0     2/29/00         */
  23
  24
  25
  26 /*
  27  * semaphore.h - POSIX semaphores
  28  *
  29  * HISTORY
  30  * 29-Feb-00    A.Ramesh at Apple
  31  *      Created for Mac OS X
  32  */
  33
  34 #ifndef _SYS_SEMAPHORE_H_
  35 #define _SYS_SEMAPHORE_H_
  36
  37 typedef int sem_t;
  38 /* this should go in limits.h> */
  39 #define SEM_VALUE_MAX 32767
  40 #define SEM_FAILED -1
  41
  42 #ifndef KERNEL
  43 int sem_close(sem_t *);
  44 int sem_destroy(sem_t *);
  45 int sem_getvalue(sem_t *, int *);
  46 int sem_init(sem_t *, int, unsigned int);
  47 sem_t * sem_open(const char *, int, ...);
  48 int sem_post(sem_t *);
  49 int sem_trywait(sem_t *);
  50 int sem_unlink(const char *);
  51 int sem_wait(sem_t *);
  52
  53 #endif /* KERNEL */
  54
  55 #endif  /* _SYS_SEMAPHORE_H_ */