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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 #include <bits/wordsize.h>
00025 
00026 /* Define options for message queue functions.  */
00027 #define MSG_NOERROR  010000 /* no error if message is too big */
00028 #ifdef __USE_GNU
00029 # define MSG_EXCEPT  020000 /* recv any msg except of specified type */
00030 #endif
00031 
00032 /* Types used in the structure definition.  */
00033 typedef unsigned long int msgqnum_t;
00034 typedef unsigned long int msglen_t;
00035 
00036 
00037 /* Structure of record for one message inside the kernel.
00038    The type `struct msg' is opaque.  */
00039 struct msqid_ds
00040 {
00041   struct ipc_perm msg_perm; /* structure describing operation permission */
00042 #if __WORDSIZE == 32
00043   unsigned int __pad1;
00044 #endif
00045   __time_t msg_stime;              /* time of last msgsnd command */
00046 #if __WORDSIZE == 32
00047   unsigned int __pad2;
00048 #endif
00049   __time_t msg_rtime;              /* time of last msgrcv command */
00050 #if __WORDSIZE == 32
00051   unsigned int __pad3;
00052 #endif
00053   __time_t msg_ctime;              /* time of last change */
00054   unsigned long int __msg_cbytes; /* current number of bytes on queue */
00055   msgqnum_t msg_qnum;              /* number of messages currently on queue */
00056   msglen_t msg_qbytes;             /* max number of bytes allowed on queue */
00057   __pid_t msg_lspid;        /* pid of last msgsnd() */
00058   __pid_t msg_lrpid;        /* pid of last msgrcv() */
00059   unsigned long int __unused1;
00060   unsigned long int __unused2;
00061 };
00062 
00063 #ifdef __USE_MISC
00064 
00065 # define msg_cbytes  __msg_cbytes
00066 
00067 /* ipcs ctl commands */
00068 # define MSG_STAT 11
00069 # define MSG_INFO 12
00070 
00071 /* buffer for msgctl calls IPC_INFO, MSG_INFO */
00072 struct msginfo
00073   {
00074     int msgpool;
00075     int msgmap;
00076     int msgmax;
00077     int msgmnb;
00078     int msgmni;
00079     int msgssz;
00080     int msgtql;
00081     unsigned short int msgseg;
00082   };
00083 
00084 #endif /* __USE_MISC */