bsd/sys/posix_shm.h

   1 /*
   2  * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  *      Copyright (c) 1990, 1996-1998 Apple Computer, Inc.
  30  *      All Rights Reserved.
  31  */
  32 /*
  33  * posix_shm.c : Support for POSIX shared memory APIs
  34  *
  35  *      File:   posix_shm.c
  36  *      Author: Ananthakrishna Ramesh
  37  *
  38  * HISTORY
  39  * 2-Sep-1999   A.Ramesh
  40  *      Created for MacOSX
  41  *
  42  */
  43
  44 #ifndef _SYS_POSIX_SHM_H_
  45 #define _SYS_POSIX_SHM_H_
  46
  47 #include <sys/appleapiopts.h>
  48 #include <sys/types.h>
  49 #include <sys/proc.h>
  50
  51 struct label;
  52
  53 #define PSHMNAMLEN      31      /* maximum name segment length we bother with */
  54
  55 struct pshminfo {
  56         unsigned int    pshm_flags;
  57         unsigned int    pshm_usecount;
  58         off_t           pshm_length;
  59         mode_t          pshm_mode;
  60         uid_t           pshm_uid;
  61         gid_t           pshm_gid;
  62         char            pshm_name[PSHMNAMLEN + 1];      /* segment name */
  63         void *          pshm_memobject;
  64 #if DIAGNOSTIC
  65         unsigned int    pshm_readcount;
  66         unsigned int    pshm_writecount;
  67         struct proc *   pshm_proc;
  68 #endif /* DIAGNOSTIC */
  69         struct label *  pshm_label;
  70 };
  71 #define PSHMINFO_NULL (struct pshminfo *)0
  72
  73 #define PSHM_NONE       1
  74 #define PSHM_DEFINED    2
  75 #define PSHM_ALLOCATED  4
  76 #define PSHM_MAPPED     8
  77 #define PSHM_INUSE      0x10
  78 #define PSHM_REMOVED    0x20
  79 #define PSHM_INCREATE   0x40
  80 #define PSHM_INDELETE   0x80
  81
  82 #endif