usr/src/lib/libbc/inc/include/sys/msg.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 1987 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_msg_h
  31 #define _sys_msg_h
  32
  33 #pragma ident   "%Z%%M% %I%     %E% SMI"
  34
  35 /*
  36  *      IPC Message Facility.
  37  */
  38
  39 /*
  40  *      Message Operation Flags.
  41  */
  42 #define MSG_NOERROR     010000  /* no error if big message */
  43
  44 /*
  45  *      Structure Definitions.
  46  */
  47
  48 /*
  49  *      There is one msg queue id data structure for each q in the system.
  50  */
  51
  52 struct msqid_ds {
  53         struct ipc_perm msg_perm;       /* operation permission struct */
  54         struct msg      *msg_first;     /* ptr to first message on q */
  55         struct msg      *msg_last;      /* ptr to last message on q */
  56         ushort          msg_cbytes;     /* current # bytes on q */
  57         ushort          msg_qnum;       /* # of messages on q */
  58         ushort          msg_qbytes;     /* max # of bytes on q */
  59         ushort          msg_lspid;      /* pid of last msgsnd */
  60         ushort          msg_lrpid;      /* pid of last msgrcv */
  61         time_t          msg_stime;      /* last msgsnd time */
  62         time_t          msg_rtime;      /* last msgrcv time */
  63         time_t          msg_ctime;      /* last change time */
  64 };
  65
  66 /*
  67  *      User message buffer template for msgsnd and msgrcv system calls.
  68  */
  69
  70 /* HACK :: change the name when compiling the kernel to avoid conflicts */
  71 struct msgbuf {
  72         long    mtype;          /* message type */
  73         char    mtext[1];       /* message text */
  74 };
  75
  76 /*
  77  *      There is one msg structure for each message that may be in the system.
  78  */
  79
  80 struct msg {
  81         struct msg      *msg_next;      /* ptr to next message on q */
  82         long            msg_type;       /* message type */
  83         ushort          msg_ts;         /* message text size */
  84         ushort          msg_spot;       /* message text map address */
  85 };
  86
  87 #endif /* !_sys_msg_h */