NAME
IPC::Msg - SysV Msg IPC object class
SYNOPSIS
use IPC::SysV qw(IPC_PRIVATE S_IRUSR S_IWUSR); use IPC::Msg; $msg = IPC::Msg->new(IPC_PRIVATE, S_IRUSR | S_IWUSR); $msg->snd($msgtype, $msgdata); $msg->rcv($buf, 256); $ds = $msg->stat; $msg->remove;
DESCRIPTION
A class providing an object based interface to SysV IPC message queues.
METHODS
-
new ( KEY , FLAGS )
Creates a new message queue associated with
KEY
. A new queue is created if-
KEY
is equal toIPC_PRIVATE
-
KEY
does not already have a message queue associated with it, andFLAGS & IPC_CREAT
is true.
On creation of a new message queue
FLAGS
is used to set the permissions. Be careful not to set any flags that the Sys V IPC implementation does not allow: in some systems setting execute bits makes the operations fail. -
-
id
Returns the system message queue identifier.
-
rcv ( BUF, LEN [, TYPE [, FLAGS ]] )
Read a message from the queue. Returns the type of the message read. See msgrcv. The BUF becomes tainted.
-
remove
Remove and destroy the message queue from the system.
- set ( STAT )
-
set ( NAME => VALUE [, NAME => VALUE ...] )
set
will set the following values of thestat
structure associated with the message queue.uid gid mode (oly the permission bits) qbytes
set
accepts either a stat object, as returned by thestat
method, or a list of name-value pairs. -
snd ( TYPE, MSG [, FLAGS ] )
Place a message on the queue with the data from
MSG
and with typeTYPE
. See msgsnd. -
stat
Returns an object of type
IPC::Msg::stat
which is a sub-class ofClass::Struct
. It provides the following fields. For a description of these fields see you system documentation.uid gid cuid cgid mode qnum qbytes lspid lrpid stime rtime ctime
SEE ALSO
AUTHORS
Graham Barr <gbarr@pobox.com>, Marcus Holland-Moritz <mhx@cpan.org>
COPYRIGHT
Version 2.x, Copyright (C) 2007-2013, Marcus Holland-Moritz.
Version 1.x, Copyright (c) 1997, Graham Barr.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
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