usr/src/lib/libbc/inc/include/sys/shm.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #ifndef _sys_shm_h
  31 #define _sys_shm_h
  32
  33 #pragma ident   "%Z%%M% %I%     %E% SMI"
  34
  35 /*
  36  *      IPC Shared Memory Facility.
  37  */
  38
  39 #include <sys/param.h>
  40 /* #include <machine/mmu.h> */
  41
  42 /*
  43  *      Shared Memory Operation Flags.
  44  */
  45
  46 #define SHM_RDONLY      010000  /* attach read-only (else read-write) */
  47 #define SHM_RND         020000  /* round attach address to SHMLBA */
  48
  49 /*
  50  * Shmctl Command Definitions.
  51  */
  52
  53 #define SHM_LOCK        3       /* Lock segment in core */
  54 #define SHM_UNLOCK      4       /* Unlock segment */
  55
  56 /*
  57  *      Implementation Constants.
  58  */
  59 #define SHMLBA  PAGESIZE        /* segment low boundary address multiple */
  60                                 /* (SHMLBA must be a power of 2) */
  61
  62 /*
  63  *      Structure Definitions.
  64  */
  65
  66 /*
  67  *      There is a shared mem id data structure for each segment in the system.
  68  */
  69
  70 struct shmid_ds {
  71         struct ipc_perm shm_perm;       /* operation permission struct */
  72         uint            shm_segsz;      /* size of segment in bytes */
  73         ushort          shm_lpid;       /* pid of last shmop */
  74         ushort          shm_cpid;       /* pid of creator */
  75         ushort          shm_nattch;     /* number of current attaches */
  76         time_t          shm_atime;      /* last shmat time */
  77         time_t          shm_dtime;      /* last shmdt time */
  78         time_t          shm_ctime;      /* last change time */
  79         struct anon_map *shm_amp;       /* segment anon_map pointer */
  80 };
  81
  82 #endif /* !_sys_shm_h */