The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/ibcs2/ibcs2_ipc.h

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    1 /*-
    2  * Copyright (c) 1995 Steven Wallace
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Steven Wallace.
   16  * 4. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * $FreeBSD: releng/6.2/sys/i386/ibcs2/ibcs2_ipc.h 139799 2005-01-06 23:22:04Z imp $
   31  */
   32 
   33 
   34 struct ibcs2_ipc_perm {
   35         u_short uid;    /* user id */
   36         u_short gid;    /* group id */
   37         u_short cuid;   /* creator user id */
   38         u_short cgid;   /* creator group id */
   39         u_short mode;   /* r/w permission */
   40         u_short seq;    /* sequence # (to generate unique msg/sem/shm id) */
   41         key_t   key;    /* user specified msg/sem/shm key */
   42 };
   43 
   44 struct ibcs2_msqid_ds {
   45         struct ibcs2_ipc_perm msg_perm;
   46         struct msg *msg_first;
   47         struct msg *msg_last;
   48         u_short msg_cbytes;
   49         u_short msg_qnum;
   50         u_short msg_qbytes;
   51         u_short msg_lspid;
   52         u_short msg_lrpid;
   53         ibcs2_time_t msg_stime;
   54         ibcs2_time_t msg_rtime;
   55         ibcs2_time_t msg_ctime;
   56 };
   57 
   58 struct ibcs2_semid_ds {
   59         struct ibcs2_ipc_perm sem_perm;
   60         struct ibcs2_sem *sem_base;
   61         u_short sem_nsems;
   62         ibcs2_time_t sem_otime;
   63         ibcs2_time_t sem_ctime;
   64 };
   65 
   66 struct ibcs2_sem {
   67         u_short semval;
   68         ibcs2_pid_t sempid;
   69         u_short semncnt;
   70         u_short semzcnt;
   71 };
   72 
   73 struct ibcs2_shmid_ds {
   74         struct ibcs2_ipc_perm shm_perm;
   75         int shm_segsz;
   76         int pad1;
   77         char pad2[4];
   78         u_short shm_lpid;
   79         u_short shm_cpid;
   80         u_short shm_nattch;
   81         u_short shm_cnattch;
   82         ibcs2_time_t shm_atime;
   83         ibcs2_time_t shm_dtime;
   84         ibcs2_time_t shm_ctime;
   85 };

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