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poe::pipe::twoway

POE::Pipe::TwoWay(3pm)					User Contributed Perl Documentation				    POE::Pipe::TwoWay(3pm)

NAME

       POE::Pipe::TwoWay - a portable API for two-way pipes

SYNOPSIS

	 my ($a_read, $a_write, $b_read, $b_write) = POE::Pipe::TwoWay->new();
	 die "couldn't create a pipe: $!" unless defined $a_read;

DESCRIPTION

       Pipes are troublesome beasts because there are a few different, incompatible ways to create them, and many operating systems implement some
       subset of them.	Therefore it's impossible to rely on a particular method for their creation.

       POE::Pipe::TwoWay will attempt to create a bidirectional pipe using an appropriate method.  If that fails, it will fall back to some other
       means until success or all methods have been exhausted.	Some operating systems require certain exceptions, which are hardcoded into the
       library.

       The upshot of all this is that an application can use POE::Pipe::TwoWay to create a bidirectional pipe without worrying about the mechanism
       that works in the current run-time environment.

       By the way, POE::Pipe::TwoWay doesn't use POE internally, so it may be used in stand-alone applications without POE.

PUBLIC METHODS

   new [TYPE]
       Create a new two-way pipe, optionally constraining it to a particular TYPE of pipe.  Two-way pipes have two ends, both of which can be read
       from and written to.  Therefore, a successful new() call will return four handles: read and write for one end, and read and write for the
       other.  On failure, new() sets $! to describe the error and returns nothing.

	 my ($a_read, $a_write, $b_read, $b_write) = POE::Pipe::TwoWay->new();
	 die $! unless defined $a_read;

       TYPE may be one of "pipe", "socketpair", or "inet".  When set, POE::Pipe::TwoWay 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.

BUGS

       POE::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::OneWay.

AUTHOR &; COPYRIGHT
       POE::Pipe::TwoWay is copyright 2000-2008 by Rocco Caputo.  All rights reserved.	POE::Pipe::TwoWay is free software; you may redistribute
       it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-05-15						    POE::Pipe::TwoWay(3pm)

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