ports/sysdeps/unix/sysv/linux/alpha/bits/msq.h

   1 /* Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _SYS_MSG_H
  19 # error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
  20 #endif
  21
  22 #include <bits/types.h>
  23
  24 /* Define options for message queue functions.  */
  25 #define MSG_NOERROR     010000  /* no error if message is too big */
  26 #ifdef __USE_GNU
  27 # define MSG_EXCEPT     020000  /* recv any msg except of specified type */
  28 #endif
  29
  30 /* Types used in the structure definition.  */
  31 typedef unsigned long int msgqnum_t;
  32 typedef unsigned long int msglen_t;
  33
  34
  35 /* Structure of record for one message inside the kernel.
  36    The type `struct msg' is opaque.  */
  37 struct msqid_ds
  38 {
  39   struct ipc_perm msg_perm;     /* structure describing operation permission */
  40   __time_t msg_stime;           /* time of last msgsnd command */
  41   __time_t msg_rtime;           /* time of last msgrcv command */
  42   __time_t msg_ctime;           /* time of last change */
  43   unsigned long int __msg_cbytes; /* current number of bytes on queue */
  44   msgqnum_t msg_qnum;           /* number of messages currently on queue */
  45   msglen_t msg_qbytes;          /* max number of bytes allowed on queue */
  46   __pid_t msg_lspid;            /* pid of last msgsnd() */
  47   __pid_t msg_lrpid;            /* pid of last msgrcv() */
  48   unsigned long int __unused1;
  49   unsigned long int __unused2;
  50 };
  51
  52 #ifdef __USE_MISC
  53
  54 # define msg_cbytes     __msg_cbytes
  55
  56 /* ipcs ctl commands */
  57 # define MSG_STAT 11
  58 # define MSG_INFO 12
  59
  60 /* buffer for msgctl calls IPC_INFO, MSG_INFO */
  61 struct msginfo
  62   {
  63     int msgpool;
  64     int msgmap;
  65     int msgmax;
  66     int msgmnb;
  67     int msgmni;
  68     int msgssz;
  69     int msgtql;
  70     unsigned short int msgseg;
  71   };
  72
  73 #endif /* __USE_MISC */