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fd26970f 1/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
8a4b65b4 2 This file is part of the GNU C Library.
d2f5be2a 3
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4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
d2f5be2a 8
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9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
d2f5be2a 13
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14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
d2f5be2a 18
f4017d20 19#ifndef _SYS_MSG_H
9756dfe1 20# error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
f4017d20 21#endif
8a4b65b4 22
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23#include <sys/types.h>
24
25/* Define options for message queue functions. */
26#define MSG_NOERROR 010000 /* no error if message is too big */
27#define MSG_EXCEPT 020000 /* recv any msg except of specified type */
28
29
d2f5be2a 30/* Structure of record for one message inside the kernel.
9756dfe1 31 The type `struct msg' is opaque. */
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32struct msqid_ds
33{
34 struct ipc_perm msg_perm; /* structure describing operation permission */
35 struct msg *__msg_first; /* pointer to first message on queue */
36 struct msg *__msg_last; /* pointer to last message on queue */
37 __time_t msg_stime; /* time of last msgsnd command */
38 __time_t msg_rtime; /* time of last msgrcv command */
39 __time_t msg_ctime; /* time of last change */
40 struct wait_queue *__wwait; /* ??? */
41 struct wait_queue *__rwait; /* ??? */
42 unsigned short int __msg_cbytes;/* current number of bytes on queue */
43 unsigned short int msg_qnum; /* number of messages currently on queue */
44 unsigned short int msg_qbytes;/* max number of bytes allowed on queue */
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45 __ipc_pid_t msg_lspid; /* pid of last msgsnd() */
46 __ipc_pid_t msg_lrpid; /* pid of last msgrcv() */
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47};
48
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49#ifdef __USE_MISC
50
9756dfe1 51# define msg_cbytes __msg_cbytes
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52
53/* ipcs ctl commands */
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54# define MSG_STAT 11
55# define MSG_INFO 12
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56
57/* buffer for msgctl calls IPC_INFO, MSG_INFO */
8a4b65b4 58struct msginfo
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59 {
60 int msgpool;
61 int msgmap;
62 int msgmax;
63 int msgmnb;
64 int msgmni;
65 int msgssz;
66 int msgtql;
9756dfe1 67 unsigned short int msgseg;
f4017d20 68 };
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69
70#endif /* __USE_MISC */