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Index of /FSS-OZR/root/sys/dev/char/13:67/subsystem/mice/power
Index of /FSS-OZR/root/sys/dev/char/13:67/subsystem/mice/power
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# IO::Poll.pm
#
# Copyright (c) 1997-8 Graham Barr . All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
package IO::Poll;
use strict;
use IO::Handle;
use Exporter ();
our @ISA = qw(Exporter);
our $VERSION = "1.41";
our @EXPORT = qw( POLLIN
POLLOUT
POLLERR
POLLHUP
POLLNVAL
);
our @EXPORT_OK = qw(
POLLPRI
POLLRDNORM
POLLWRNORM
POLLRDBAND
POLLWRBAND
POLLNORM
);
# [0] maps fd's to requested masks
# [1] maps fd's to returned masks
# [2] maps fd's to handles
sub new {
my $class = shift;
my $self = bless [{},{},{}], $class;
$self;
}
sub mask {
my $self = shift;
my $io = shift;
my $fd = fileno($io);
return unless defined $fd;
if (@_) {
my $mask = shift;
if($mask) {
$self->[0]{$fd}{$io} = $mask; # the error events are always returned
$self->[1]{$fd} = 0; # output mask
$self->[2]{$io} = $io; # remember handle
} else {
delete $self->[0]{$fd}{$io};
unless(%{$self->[0]{$fd}}) {
# We no longer have any handles for this FD
delete $self->[1]{$fd};
delete $self->[0]{$fd};
}
delete $self->[2]{$io};
}
}
return unless exists $self->[0]{$fd} and exists $self->[0]{$fd}{$io};
return $self->[0]{$fd}{$io};
}
sub poll {
my($self,$timeout) = @_;
$self->[1] = {};
my($fd,$mask,$iom);
my @poll = ();
while(($fd,$iom) = each %{$self->[0]}) {
$mask = 0;
$mask |= $_ for values(%$iom);
push(@poll,$fd => $mask);
}
my $ret = _poll(defined($timeout) ? $timeout * 1000 : -1,@poll);
return $ret
unless $ret > 0;
while(@poll) {
my($fd,$got) = splice(@poll,0,2);
$self->[1]{$fd} = $got if $got;
}
return $ret;
}
sub events {
my $self = shift;
my $io = shift;
my $fd = fileno($io);
exists $self->[1]{$fd} and exists $self->[0]{$fd}{$io}
? $self->[1]{$fd} & ($self->[0]{$fd}{$io}|POLLHUP|POLLERR|POLLNVAL)
: 0;
}
sub remove {
my $self = shift;
my $io = shift;
$self->mask($io,0);
}
sub handles {
my $self = shift;
return values %{$self->[2]} unles