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IO::Async::Loop::Poll.3pm

NAME

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

SYNOPSIS

  use IO::Async::Loop::Poll;
 
  my $loop = IO::Async::Loop::Poll->new();
 
  $loop->add( ... );
 
  $loop->loop_forever();
 
 

Or

  while(1) {
     $loop->loop_once();
     ...
  }
 
 

Or

  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 "enqueue_timer" 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>