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glibc  2.9
msq.h
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00001 /* Copyright (C) 1995, 1996, 1997, 2000, 2002 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 #if __WORDSIZE == 32
00042   unsigned int __unused1;
00043 #endif
00044   __time_t msg_stime;          /* time of last msgsnd command */
00045 #if __WORDSIZE == 32
00046   unsigned int __unused2;
00047 #endif
00048   __time_t msg_rtime;          /* time of last msgrcv command */
00049 #if __WORDSIZE == 32
00050   unsigned int __unused3;
00051 #endif
00052   __time_t msg_ctime;          /* time of last change */
00053   unsigned long __msg_cbytes; /* current number of bytes on queue */
00054   msgqnum_t msg_qnum;          /* number of messages currently on queue */
00055   msglen_t msg_qbytes;         /* max number of bytes allowed on queue */
00056   __pid_t msg_lspid;           /* pid of last msgsnd() */
00057   __pid_t msg_lrpid;           /* pid of last msgrcv() */
00058   unsigned long __unused4;
00059   unsigned long __unused5;
00060 };
00061 
00062 #ifdef __USE_MISC
00063 
00064 # define msg_cbytes    __msg_cbytes
00065 
00066 /* ipcs ctl commands */
00067 # define MSG_STAT 11
00068 # define MSG_INFO 12
00069 
00070 /* buffer for msgctl calls IPC_INFO, MSG_INFO */
00071 struct msginfo
00072   {
00073     int msgpool;
00074     int msgmap;
00075     int msgmax;
00076     int msgmnb;
00077     int msgmni;
00078     int msgssz;
00079     int msgtql;
00080     unsigned short int msgseg;
00081   };
00082 
00083 #endif /* __USE_MISC */