1 /* Copyright (C) 1995-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
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 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
19 # error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
22 #include <bits/types.h>
23 #include <bits/msq-pad.h>
25 /* Define options for message queue functions. */
26 #define MSG_NOERROR 010000 /* no error if message is too big */
28 # define MSG_EXCEPT 020000 /* recv any msg except of specified type */
29 # define MSG_COPY 040000 /* copy (not remove) all queue messages */
32 /* Types used in the structure definition. */
33 typedef __syscall_ulong_t msgqnum_t
;
34 typedef __syscall_ulong_t msglen_t
;
36 #if __MSQ_PAD_BEFORE_TIME
37 # define __MSQ_PAD_TIME(NAME, RES) \
38 unsigned long int __glibc_reserved ## RES; __time_t NAME
39 #elif __MSQ_PAD_AFTER_TIME
40 # define __MSQ_PAD_TIME(NAME, RES) \
41 __time_t NAME; unsigned long int __glibc_reserved ## RES
43 # define __MSQ_PAD_TIME(NAME, RES) \
47 /* Structure of record for one message inside the kernel.
48 The type `struct msg' is opaque. */
51 struct ipc_perm msg_perm
; /* structure describing operation permission */
52 __MSQ_PAD_TIME (msg_stime
, 1); /* time of last msgsnd command */
53 __MSQ_PAD_TIME (msg_rtime
, 2); /* time of last msgrcv command */
54 __MSQ_PAD_TIME (msg_ctime
, 3); /* time of last change */
55 __syscall_ulong_t __msg_cbytes
; /* current number of bytes on queue */
56 msgqnum_t msg_qnum
; /* number of messages currently on queue */
57 msglen_t msg_qbytes
; /* max number of bytes allowed on queue */
58 __pid_t msg_lspid
; /* pid of last msgsnd() */
59 __pid_t msg_lrpid
; /* pid of last msgrcv() */
60 __syscall_ulong_t __glibc_reserved4
;
61 __syscall_ulong_t __glibc_reserved5
;
66 # define msg_cbytes __msg_cbytes
68 /* ipcs ctl commands */
71 # define MSG_STAT_ANY 13
73 /* buffer for msgctl calls IPC_INFO, MSG_INFO */
83 unsigned short int msgseg
;
86 #endif /* __USE_MISC */