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

   1 /* Copyright (C) 2011-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SYS_MSG_H
  20 # error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
  21 #endif
  22
  23 #include <bits/types.h>
  24 #include <bits/wordsize.h>
  25
  26 /* Define options for message queue functions.  */
  27 #define MSG_NOERROR     010000  /* no error if message is too big */
  28 #ifdef __USE_GNU
  29 # define MSG_EXCEPT     020000  /* recv any msg except of specified type */
  30 # define MSG_COPY       040000  /* copy (not remove) all queue messages */
  31 #endif
  32
  33 /* Types used in the structure definition.  */
  34 typedef unsigned long int msgqnum_t;
  35 typedef unsigned long int msglen_t;
  36
  37 /* Structure of record for one message inside the kernel.
  38    The type `struct msg' is opaque.  */
  39 struct msqid_ds
  40 {
  41   struct ipc_perm msg_perm;     /* structure describing operation permission */
  42   __time_t msg_stime;           /* time of last msgsnd command */
  43 #if __WORDSIZE == 32
  44   unsigned long int __glibc_reserved1;
  45 #endif
  46   __time_t msg_rtime;           /* time of last msgrcv command */
  47 #if __WORDSIZE == 32
  48   unsigned long int __glibc_reserved2;
  49 #endif
  50   __time_t msg_ctime;           /* time of last change */
  51 #if __WORDSIZE == 32
  52   unsigned long int __glibc_reserved3;
  53 #endif
  54   unsigned long int __msg_cbytes; /* current number of bytes on queue */
  55   msgqnum_t msg_qnum;           /* number of messages currently on queue */
  56   msglen_t msg_qbytes;          /* max number of bytes allowed on queue */
  57   __pid_t msg_lspid;            /* pid of last msgsnd() */
  58   __pid_t msg_lrpid;            /* pid of last msgrcv() */
  59   unsigned long int __glibc_reserved4;
  60   unsigned long int __glibc_reserved5;
  61 };
  62
  63 #ifdef __USE_MISC
  64
  65 # define msg_cbytes     __msg_cbytes
  66
  67 /* ipcs ctl commands */
  68 # define MSG_STAT 11
  69 # define MSG_INFO 12
  70
  71 /* buffer for msgctl calls IPC_INFO, MSG_INFO */
  72 struct msginfo
  73   {
  74     int msgpool;
  75     int msgmap;
  76     int msgmax;
  77     int msgmnb;
  78     int msgmni;
  79     int msgssz;
  80     int msgtql;
  81     unsigned short int msgseg;
  82   };
  83
  84 #endif /* __USE_MISC */