bsd/sys/semaphore.h

   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_ */