trusty (3) IO::Async::Loop::Poll.3pm.gz

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>