io::async::loop::poll(3pm) [debian man page]

IO::Async::Loop::Poll(3pm)				User Contributed Perl Documentation				IO::Async::Loop::Poll(3pm)

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>

perl v5.14.2							    2012-10-24						IO::Async::Loop::Poll(3pm)

IO::Async::Loop::Select(3pm)				User Contributed Perl Documentation			      IO::Async::Loop::Select(3pm)

NAME

       "IO::Async::Loop::Select" - use "IO::Async" with "select(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 a "select" call.

	use IO::Async::Loop::Select;

	my $loop = IO::Async::Loop::Select->new;

	$loop->add( ... );

	while(1) {
	   my ( $rvec, $wvec, $evec ) = ('') x 3;
	   my $timeout;

	   $loop->pre_select( $rvec, $wvec, $evec, $timeout );
	   ...
	   my $ret = select( $rvec, $wvec, $evec, $timeout );
	   ...
	   $loop->post_select( $rvec, $evec, $wvec );
	}

DESCRIPTION

       This subclass of "IO::Async::Loop" uses the select(2) syscall to perform read-ready and write-ready tests.

       To integrate with an existing "select"-based event loop, a pair of methods "pre_select" and "post_select" can be called immediately before
       and after a "select" call. The relevant bits in the read-ready, write-ready and exceptional-state bitvectors are set by the "pre_select"
       method, and tested by the "post_select" method to pick which event callbacks to invoke.

CONSTRUCTOR

   $loop = IO::Async::Loop::Select->new
       This function returns a new instance of a "IO::Async::Loop::Select" object.  It takes no special arguments.

METHODS

   $loop->pre_select( $readvec, $writevec, $exceptvec, $timeout )
       This method prepares the bitvectors for a "select" call, setting the bits that the Loop is interested in. It will also adjust the $timeout
       value if appropriate, reducing it if the next event timeout the Loop requires is sooner than the current value.

       $readvec
       $writevec
       $exceptvec
	       Scalar references to the reading, writing and exception bitvectors

       $timeout
	       Scalar reference to the timeout value

   $loop->post_select( $readvec, $writevec, $exceptvec )
       This method checks the returned bitvectors from a "select" call, and calls any of the callbacks that are appropriate.

       $readvec
       $writevec
       $exceptvec
	       Scalars containing the read-ready, write-ready and exception bitvectors

   $count = $loop->loop_once( $timeout )
       This method calls the "pre_select" method to prepare the bitvectors for a "select" syscall, performs it, then calls "post_select" to
       process the result. It returns the total number of callbacks invoked by the "post_select" method, or "undef" if the underlying select(2)
       syscall returned an error.

SEE ALSO

       o   IO::Select - OO interface to select system call

AUTHOR

       Paul Evans <leonerd@leonerd.org.uk>

perl v5.14.2							    2012-10-24					      IO::Async::Loop::Select(3pm)