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>