Manual Reference Pages - IO::ASYNC::LOOP::POLL (3)
"IO::Async::Loop::Poll" - use "IO::Async" with "poll(2)"
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.
my $poll = IO::Poll->new;
my $loop = IO::Async::Loop::Poll->new( poll => $poll );
$loop->add( ... );
my $timeout = ...
my $ret = $poll->poll( $timeout );
This subclass of IO::Async::Loop uses the poll(2) system call to perform
read-ready and write-ready tests.
By default, this loop will use the underlying poll() system call directly,
bypassing the usual IO::Poll object wrapper around it because of a number
of bugs and design flaws in that class; namely
However, to integrate with existing code that uses an IO::Poll object, a
post_poll can be called immediately after the poll method that
IO::Poll object. The appropriate mask bits are maintained on the
IO::Poll object when notifiers are added or removed from the loop, or when
they change their want_* status. The post_poll method inspects the
result bits and invokes the on_read_ready or on_write_ready methods on
<https://rt.cpan.org/Ticket/Display.html?id=93107> - IO::Poll relies on
stable stringification of IO handles
<https://rt.cpan.org/Ticket/Display.html?id=25049> - IO::Poll->poll() with no
handles always returns immediately
$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:
The IO::Poll object to use for notification. Optional; if a value is not
given, the underlying IO::Poll::_poll() function is invoked directly,
outside of the object wrapping.
$count = $loop->post_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.
$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
Paul Evans <email@example.com>
|perl v5.20.3 ||IO::ASYNC::LOOP::POLL (3) ||2015-12-15 |
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