IO::Async::Loop::Poll(3pm)				User Contributed Perl Documentation				IO::Async::Loop::Poll(3pm)

NAME

       "IO::Async::Loop::Poll" - use "IO::Async" with "poll(2)"

SYNOPSIS

       Normally an instance of this class would not be directly constructed by a program. It may however, be useful for runinng IO::Async with an
       existing program already using an "IO::Poll" object.

	use IO::Poll;
	use IO::Async::Loop::Poll;

	my $poll = IO::Poll->new;
	my $loop = IO::Async::Loop::Poll->new( poll => $poll );

	$loop->add( ... );

	while(1) {
	   my $timeout = ...
	   my $ret = $poll->poll( $timeout );
	   $loop->post_poll;
	}

DESCRIPTION

       This subclass of "IO::Async::Loop" uses an "IO::Poll" object to perform read-ready and write-ready tests.

       To integrate with existing code that uses an "IO::Poll", a "post_poll" can be called immediately after the "poll" method on the contained
       "IO::Poll" object. The appropriate mask bits are maintained on the "IO::Poll" object when notifiers are added or removed from the set, or
       when they change their "want_writeready" status. The "post_poll" method inspects the result bits and invokes the "on_read_ready" or
       "on_write_ready" methods on the notifiers.

CONSTRUCTOR

   $loop = IO::Async::Loop::Poll->new( %args )
       This function returns a new instance of a "IO::Async::Loop::Poll" object. It takes the following named arguments:

       "poll"  The "IO::Poll" object to use for notification. Optional; if a value is not given, a new "IO::Poll" object will be constructed.

METHODS

   $count = $loop->post_poll( $poll )
       This method checks the returned event list from a "IO::Poll::poll" call, and calls any of the notification methods or callbacks that are
       appropriate.  It returns the total number of callbacks that were invoked; that is, the total number of "on_read_ready" and "on_write_ready"
       callbacks for "watch_io", and "watch_time" event callbacks.

       $poll   Reference to the "IO::Poll" object

   $count = $loop->loop_once( $timeout )
       This method calls the "poll" method on the stored "IO::Poll" object, passing in the value of $timeout, and then runs the "post_poll" method
       on itself. It returns the total number of callbacks invoked by the "post_poll" method, or "undef" if the underlying "poll" method returned
       an error.

AUTHOR

       Paul Evans <leonerd@leonerd.org.uk>

perl v5.14.2							    2012-10-24						IO::Async::Loop::Poll(3pm)