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package Select::Retry;
use strict;
use warnings;
use Sub::Exporter -setup => {
exports => [ 'retry_select' ],
groups => { default => [ 'retry_select' ] },
};
sub retry_select {
my $options = (@_ > 1 && ref($_[0]) eq 'HASH'
? shift
: { mode => 'r' });
my (@handles) = @_;
my ($out, $eout);
my ($in, $ein) = (_build_select_vec(@handles)) x 2;
my $res;
if ($options->{mode} eq 'r') {
$res = select($out = $in, undef, $eout = $ein, $options->{timeout});
}
else {
$res = select(undef, $out = $in, $eout = $ein, $options->{timeout});
}
my $again = $!{EAGAIN} || $!{EINTR};
if ($res == -1) {
if ($again) {
return retry_select($options, @handles);
}
else {
Carp::croak("select failed: $!");
}
}
return ($out, $eout);
}
sub _build_select_vec {
my @handles = @_;
my $vec = '';
for my $handle (@handles) {
vec($vec, fileno($handle), 1) = 1;
}
return $vec;
}
1;
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