/usr/share/perl5/IO/Event/Event.pm is in libio-event-perl 0.813-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110  | #
# Use Event for the IO::Event event handler
#
my $debug = $IO::Event::debug;
my $edebug = $IO::Event::edebug;
my $sdebug = $IO::Event::sdebug;
package IO::Event::Event;
require IO::Event;
use strict;
use warnings;
our @ISA = qw(IO::Event::Common);
sub import
{
	require IO::Event;
	IO::Event->import('no_emulate_Event');
}
sub new
{
	my ($pkg, @stuff) = @_;
	require Event;
	require Event::Watcher;
	$pkg->SUPER::new(@stuff);
}
sub loop
{
	require Event;
	Event::loop(@_);
}
sub unloop_all
{
	require Event;
	Event::unloop_all(@_);
}
sub timer
{
	require Event;
	shift;
	Event->timer(hard => 1, @_);
}
sub idle
{
	require Event;
	shift;
	Event->idle(@_);
}
sub set_write_polling
{
	my ($self, $new) = @_;
	my $event = ${*$self}{ie_event};
	if ($new) {
		$event->poll($event->poll | Event::Watcher::W());
	} else {
		$event->poll($event->poll & ~Event::Watcher::W());
	}
}
sub set_read_polling
{
	my ($self, $new) = @_;
	my $event = ${*$self}{ie_event};
	if ($new) {
		$event->poll($event->poll | Event::Watcher::R());
	} else {
		if ($event) {
			$event->poll($event->poll & ~Event::Watcher::R());
		}
	}
}
sub ie_register
{
	my ($self) = @_;
	my ($fh, $fileno) = $self->SUPER::ie_register();
	my $R = ${*$self}{ie_readclosed}
		? 0
		: Event::Watcher::R();
	${*$self}{ie_want_read_events} = ! ${*$self}{ie_readclosed};
	${*$self}{ie_want_write_events} = '';
	${*$self}{ie_event} = Event->io(
		fd	=> $fileno,
		poll	=> Event::Watcher::E()|Event::Watcher::T()|$R,
		cb	=> [ $self, 'ie_dispatch' ],
		desc	=> ${*$self}{ie_desc},
		edebug	=> $edebug,
	);
	print STDERR "registered ${*$self}{ie_fileno}:${*$self}{ie_desc} $self $fh ${*$self}{ie_event}\n"
		if $debug;
}
sub ie_deregister
{
	my ($self) = @_;
	$self->SUPER::ie_deregister();
	${*$self}{ie_event}->cancel
		if ${*$self}{ie_event};
	delete ${*$self}{ie_event};
}
1;
 |