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glibc  2.9
msq.h
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00001 /* Copyright (C) 1995, 1997, 2000 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #ifndef _SYS_MSG_H
00020 #error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
00021 #endif
00022 
00023 #include <bits/types.h>
00024 
00025 /* Define options for message queue functions.  */
00026 #define MSG_NOERROR  010000 /* no error if message is too big */
00027 
00028 /* Types used in the structure definition.  */
00029 typedef unsigned short int msgqnum_t;
00030 typedef unsigned short int msglen_t;
00031 
00032 
00033 /* Structure of record for one message inside the kernel.
00034    The type `struct __msg' is opaque.  */
00035 struct msqid_ds
00036 {
00037   struct ipc_perm msg_perm; /* structure describing operation permission */
00038   __time_t msg_stime;              /* time of last msgsnd command */
00039   __time_t msg_rtime;              /* time of last msgrcv command */
00040   __time_t msg_ctime;              /* time of last change */
00041   msgqnum_t msg_qnum;              /* number of messages currently on queue */
00042   msglen_t msg_qbytes;             /* max number of bytes allowed on queue */
00043   __pid_t msg_lspid;        /* pid of last msgsnd() */
00044   __pid_t msg_lrpid;        /* pid of last msgrcv() */
00045 };