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>