1 /* Copyright (C) 1995-1997,1999,2000,2003,2006,2007
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
27 /* Get common definition of System V style IPC. */
30 /* Get system dependent definition of `struct msqid_ds' and more. */
33 /* Define types required by the standard. */
37 #ifndef __pid_t_defined
38 typedef __pid_t pid_t
;
39 # define __pid_t_defined
42 #ifndef __ssize_t_defined
43 typedef __ssize_t ssize_t
;
44 # define __ssize_t_defined
47 /* The following System V style IPC functions implement a message queue
48 system. The definition is found in XPG2. */
51 /* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */
54 long int mtype
; /* type of received/sent message */
55 char mtext
[1]; /* text of the message */
62 /* Message queue control operation. */
63 extern int msgctl (int __msqid
, int __cmd
, struct msqid_ds
*__buf
) __THROW
;
65 /* Get messages queue. */
66 extern int msgget (key_t __key
, int __msgflg
) __THROW
;
68 /* Receive message from message queue.
70 This function is a cancellation point and therefore not marked with
72 extern ssize_t
msgrcv (int __msqid
, void *__msgp
, size_t __msgsz
,
73 long int __msgtyp
, int __msgflg
);
75 /* Send message to message queue.
77 This function is a cancellation point and therefore not marked with
79 extern int msgsnd (int __msqid
, const void *__msgp
, size_t __msgsz
,
84 #endif /* sys/msg.h */