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glibc  2.9
msq.h
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00001 /* Copyright (C) 1995, 1996, 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 #ifdef __USE_GNU
00028 # define MSG_EXCEPT  020000 /* recv any msg except of specified type */
00029 #endif
00030 
00031 /* Types used in the structure definition.  */
00032 typedef unsigned long int msgqnum_t;
00033 typedef unsigned long int msglen_t;
00034 
00035 
00036 /* Structure of record for one message inside the kernel.
00037    The type `struct msg' is opaque.  */
00038 struct msqid_ds
00039 {
00040   struct ipc_perm msg_perm; /* structure describing operation permission */
00041   __time_t msg_stime;              /* time of last msgsnd command */
00042   unsigned long int __unused1;
00043   __time_t msg_rtime;              /* time of last msgrcv command */
00044   unsigned long int __unused2;
00045   __time_t msg_ctime;              /* time of last change */
00046   unsigned long int __unused3;
00047   unsigned long int __msg_cbytes; /* current number of bytes on queue */
00048   msgqnum_t msg_qnum;              /* number of messages currently on queue */
00049   msglen_t msg_qbytes;             /* max number of bytes allowed on queue */
00050   __pid_t msg_lspid;        /* pid of last msgsnd() */
00051   __pid_t msg_lrpid;        /* pid of last msgrcv() */
00052   unsigned long int __unused4;
00053   unsigned long int __unused5;
00054 };
00055 
00056 #ifdef __USE_MISC
00057 
00058 # define msg_cbytes  __msg_cbytes
00059 
00060 /* ipcs ctl commands */
00061 # define MSG_STAT 11
00062 # define MSG_INFO 12
00063 
00064 /* buffer for msgctl calls IPC_INFO, MSG_INFO */
00065 struct msginfo
00066   {
00067     int msgpool;
00068     int msgmap;
00069     int msgmax;
00070     int msgmnb;
00071     int msgmni;
00072     int msgssz;
00073     int msgtql;
00074     unsigned short int msgseg;
00075   };
00076 
00077 #endif /* __USE_MISC */