POE::Pipe::OneWay(3) User Contributed Perl Documentation POE::Pipe::OneWay(3)NAMEPOE::Pipe::OneWay - a portable API for one-way pipes
SYNOPSIS
my ($read, $write) = POE::Pipe::OneWay->new();
die "couldn't create a pipe: $!" unless defined $read;
DESCRIPTION
The right way to create an anonymous pipe varies from one operating
system to the next. Some operating systems support "pipe()". Others
require "socketpair()". And a few operating systems support neither,
so a plain old socket must be created.
POE::Pipe::OneWay will attempt to create a unidirectional pipe using
"pipe()", "socketpair()", and IO::Socket::INET, in that order.
Exceptions are hardcoded for operating systems with broken or
nonstandard behaviors.
The upshot of all this is that an application can portably create a
one-way pipe by instantiating POE::Pipe::OneWay. The work of deciding
how to create the pipe and opening the handles will be taken care of
internally.
POE::Pipe::OneWay may be used outside of POE, as it doesn't use POE
internally.
PUBLIC METHODS
new [TYPE]
Create a new one-way pipe, optionally constraining it to a particular
TYPE of pipe. One-way pipes have two ends: a "read" end and a "write"
end. On success, new() returns two handles: one for the "read" end and
one for the "write" end. Returns nothing on failure, and sets $! to
explain why the constructor failed.
my ($read, $write) = POE::Pipe::OneWay->new();
die $! unless defined $read;
TYPE may be one of "pipe", "socketpair", or "inet". When set,
POE::Pipe::OneWay will constrain its search to either "pipe()", a UNIX-
domain "socketpair()", or plain old sockets, respectively. Otherwise
new() will try each method in order, or a particular method
predetermined to be the best one for the current operating environment.
BUGSPOE::Pipe::OneWay may block up to one second on some systems if failure
occurs while trying to create "inet" sockets.
SEE ALSO
POE::Pipe, POE::Pipe::TwoWay.
AUTHOR & COPYRIGHTPOE::Pipe::OneWay is copyright 2000-2008 by Rocco Caputo. All rights
reserved. POE::Pipe::OneWay is free software; you may redistribute it
and/or modify it under the same terms as Perl itself.
perl v5.14.2 2011-12-15 POE::Pipe::OneWay(3)
