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glibc  2.9
msq.h
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00001 /* Copyright (C) 2000 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003        Contribute by David Mosberger-Tang <davidm@hpl.hp.com>
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #ifndef _SYS_MSG_H
00021 #error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
00022 #endif
00023 
00024 #include <sys/types.h>
00025 
00026 /* Define options for message queue functions.  */
00027 #define MSG_NOERROR  010000 /* no error if message is too big */
00028 #define MSG_EXCEPT   020000 /* recv any msg except of specified type */
00029 
00030 
00031 /* Structure of record for one message inside the kernel.
00032    The type `struct __msg' is opaque.  */
00033 struct msqid_ds
00034 {
00035   struct ipc_perm msg_perm; /* structure describing operation permission */
00036   __time_t msg_stime;              /* time of last msgsnd command */
00037   __time_t msg_rtime;              /* time of last msgrcv command */
00038   __time_t msg_ctime;              /* time of last change */
00039   unsigned long int __msg_cbytes;  /* current number of bytes on queue */
00040   unsigned long int msg_qnum;      /* number of messages currently on queue */
00041   unsigned long int msg_qbytes;    /* max number of bytes allowed on queue */
00042   __pid_t msg_lspid;        /* pid of last msgsnd() */
00043   __pid_t msg_lrpid;        /* pid of last msgrcv() */
00044   unsigned long int __unused1;
00045   unsigned long int __unused2;
00046 };
00047 
00048 #ifdef __USE_MISC
00049 
00050 # define msg_cbytes  __msg_cbytes
00051 
00052 /* ipcs ctl commands */
00053 # define MSG_STAT 11
00054 # define MSG_INFO 12
00055 
00056 /* buffer for msgctl calls IPC_INFO, MSG_INFO */
00057 struct msginfo
00058   {
00059     int msgpool;
00060     int msgmap;
00061     int msgmax;
00062     int msgmnb;
00063     int msgmni;
00064     int msgssz;
00065     int msgtql;
00066     unsigned short int msgseg;
00067   };
00068 
00069 #endif /* __USE_MISC */