Perl 5 version 28.0 documentation
IPC::Msg - SysV Msg IPC object class
A class providing an object based interface to SysV IPC message queues.
- new ( KEY , FLAGS )
Creates a new message queue associated with
KEY. A new queue is created if
KEYis equal to
KEYdoes not already have a message queue associated with it, and
FLAGS & IPC_CREATis true.
On creation of a new message queue
FLAGSis 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.
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(2). The BUF becomes tainted.
Remove and destroy the message queue from the system.
- set ( STAT )
- set ( NAME => VALUE [, NAME => VALUE ...] )
setwill set the following values of the
statstructure associated with the message queue.
- mode (oly the permission bits)
setaccepts either a stat object, as returned by the
statmethod, or a list of name-value pairs.
- snd ( TYPE, MSG [, FLAGS ] )
Place a message on the queue with the data from
MSGand with type
TYPE. See msgsnd(2).
Returns an object of type
IPC::Msg::statwhich is a sub-class of
Class::Struct. It provides the following fields. For a description of these fields see you system documentation.
Graham Barr <firstname.lastname@example.org>, Marcus Holland-Moritz <email@example.com>
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.