Mass Deface
add(@_)
if @_;
$vec;
}
sub add
{
shift->_update('add', @_);
}
sub remove
{
shift->_update('remove', @_);
}
sub exists
{
my $vec = shift;
my $fno = $vec->_fileno(shift);
return undef unless defined $fno;
$vec->[$fno + FIRST_FD];
}
sub _fileno
{
my($self, $f) = @_;
return unless defined $f;
$f = $f->[0] if ref($f) eq 'ARRAY';
($f =~ /^\d+$/) ? $f : fileno($f);
}
sub _update
{
my $vec = shift;
my $add = shift eq 'add';
my $bits = $vec->[VEC_BITS];
$bits = '' unless defined $bits;
my $count = 0;
my $f;
foreach $f (@_)
{
my $fn = $vec->_fileno($f);
if ($add) {
next unless defined $fn;
my $i = $fn + FIRST_FD;
if (defined $vec->[$i]) {
$vec->[$i] = $f; # if array rest might be different, so we update
next;
}
$vec->[FD_COUNT]++;
vec($bits, $fn, 1) = 1;
$vec->[$i] = $f;
} else { # remove
if ( ! defined $fn ) { # remove if fileno undef'd
defined($_) && $_ == $f and do { $vec->[FD_COUNT]--; $_ = undef; }
for @{$vec}[FIRST_FD .. $#$vec];
next;
}
my $i = $fn + FIRST_FD;
next unless defined $vec->[$i];
$vec->[FD_COUNT]--;
vec($bits, $fn, 1) = 0;
$vec->[$i] = undef;
}
$count++;
}
$vec->[VEC_BITS] = $vec->[FD_COUNT] ? $bits : undef;
$count;
}
sub can_read
{
my $vec = shift;
my $timeout = shift;
my $r = $vec->[VEC_BITS];
defined($r) && (select($r,undef,undef,$timeout) > 0)
? handles($vec, $r)
: ();
}
sub can_write
{
my $vec = shift;
my $timeout = shift;
my $w = $vec->[VEC_BITS];
defined($w) && (select(undef,$w,undef,$timeout) > 0)
? handles($vec, $w)
: ();
}
sub has_exception
{
my $vec = shift;
my $timeout = shift;
my $e = $vec->[VEC_BITS];
defined($e) && (select(undef,undef,$e,$timeout) > 0)
? handles($vec, $e)
: ();
}
sub has_error
{
warnings::warn("Call to deprecated method 'has_error', use 'has_exception'")
if warnings::enabled();
goto &has_exception;
}
sub count
{
my $vec = shift;
$vec->[FD_COUNT];
}
sub bits
{
my $vec = shift;
$vec->[VEC_BITS];
}
sub as_string # for debugging
{
my $vec = shift;
my $str = ref($vec) . ": ";
my $bits = $vec->bits;
my $count = $vec->count;
$str .= defined($bits) ? unpack("b*", $bits) : "undef";
$str .= " $count";
my @handles = @$vec;
splice(@handles, 0, FIRST_FD);
for (@handles) {
$str .= " " . (defined($_) ? "$_" : "-");
}
$str;
}
sub _max
{
my($a,$b,$c) = @_;
$a > $b
? $a > $c
? $a
: $c
: $b > $c
? $b
: $c;
}
sub select
{
shift
if defined $_[0] && !ref($_[0]);
my($r,$w,$e,$t) = @_;
my @result = ();
my $rb = defined $r ? $r->[VEC_BITS] : undef;
my $wb = defined $w ? $w->[VEC_BITS] : undef;
my $eb = defined $e ? $e->[VEC_BITS] : undef;
if(select($rb,$wb,$eb,$t) > 0)
{
my @r = ();
my @w = ();
my @e = ();
my $i = _max(defined $r ? scalar(@$r)-1 : 0,
defined $w ? scalar(@$w)-1 : 0,
defined $e ? scalar(@$e)-1 : 0);
for( ; $i >= FIRST_FD ; $i--)
{
my $j = $i - FIRST_FD;
push(@r, $r->[$i])
if defined $rb && defined $r->[$i] && vec($rb, $j, 1);
push(@w, $w->[$i])
if defined $wb && defined $w->[$i] && vec($wb, $j, 1);
push(@e, $e->[$i])
if defined $eb && defined $e->[$i] && vec($eb, $j, 1);
}
@result = (\@r, \@w, \@e);
}
@result;
}
sub handles
{
my $vec = shift;
my $bits = shift;
my @h = ();
my $i;
my $max = scalar(@$vec) - 1;
for ($i = FIRST_FD; $i <= $max; $i++)
{
next unless defined $vec->[$i];
push(@h, $vec->[$i])
if !defined($bits) || vec($bits, $i - FIRST_FD, 1);
}
@h;
}
1;
__END__
=head1 NAME
IO::Select - OO interface to the select system call
=head1 SYNOPSIS
use IO::Select;
$s = IO::Select->new();
$s->add(\*STDIN);
$s->add($some_handle);
@ready = $s->can_read($timeout);
@ready = IO::Select->new(@handles)->can_read(0);
=head1 DESCRIPTION
The C