lib/libc/sysvipc/sysvipc_ipc.h

   1 /**
   2  * Copyright (c) 2013 Larisa Grigore<larisagrigore@gmail.com>.
   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. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef _SYSV_IPC_H_
  29 #define _SYSV_IPC_H_
  30
  31 #define MAXSIZE         100
  32
  33 #define IPC_INITIALIZED 1
  34
  35 #define SHMGET          1
  36 #define SEMGET          2
  37 #define MSGGET          3
  38 #define UNDOGET         4
  39
  40 #define SHMAT           5
  41 #define SHMDT           6
  42 #define SHMCTL          7
  43
  44 #define SEMOP           8
  45 #define SEMCTL          9
  46
  47 #define PIPE_READ       0
  48 #define PIPE_WRITE      1
  49
  50 #define IPCID_TO_IX(id)         ((id) & 0xffff)
  51 #define IPCID_TO_SEQ(id)        (((id) >> 16) & 0xffff)
  52 #define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff))
  53
  54 #include <sys/shm.h>
  55 #include "sysvipc_utils.h"
  56
  57 /* Structures used to send/receive
  58  * messages to/from daemon.
  59  */
  60 struct shmget_msg {
  61         key_t key;
  62         size_t size;
  63         int shmflg;
  64         int type;
  65 };
  66
  67 struct shmat_msg {
  68         int shmid;
  69         const void *shmaddr;
  70         int shmflg;
  71         size_t size;
  72 };
  73
  74 struct shmdt_msg {
  75         const void *shmaddr;
  76 };
  77
  78 struct shmctl_msg {
  79         int shmid;
  80         int cmd;
  81         struct shmid_ds buf;
  82 };
  83
  84 struct sysvipc_msg {
  85         int type;
  86         char data[0];
  87 };
  88
  89 struct semget_msg {
  90         key_t key;
  91         int nsems;
  92         int shmflg;
  93 };
  94
  95 /* Send/receive messages. */
  96 int send_message(int, int, char *, int);
  97 int receive_type_message(int);
  98 int receive_message(int, char *, int);
  99
 100 /* sysv ipc structures initialization. */
 101 int is_sysvinit(void);
 102 int sysvinit(void);
 103 int sysvexit(void);
 104
 105 #endif