HOLY COW! I'm totally inspired by your "nothing cannot be done in Perl" attitude. It took me some time to digest that code, and I finally came up with my interpretation of that. I hope this helps many others who are on the same (average) level as me and facing the same problem too! 
#!/usr/bin/perl
use strict;
use warnings;

use Carp;
use English '-no_match_vars';
use charnames ':full';
use Readonly;
use Readonly::XS;
use threads;
use IO::Socket;

use version; Readonly::Scalar our $VERSION => qv(0.0_1);

$OUTPUT_AUTOFLUSH = 1;

# IOCTL code to enable or disable non-blocking mode on a socket
Readonly::Scalar my $FIONBIO => 0x80_046_67e;

# Create a UDP server socket as input??? Pick a random port number
my $in_sock = IO::Socket::INET->new(
    LocalAddr => 'localhost',
    LocalPort => 0,
    Proto     => 'udp'
) or croak 'Failed to open port';

# Enable the newly created input socket's non-blocking mode
my $true = 1;
( ioctl $in_sock, $FIONBIO, \$true ) or croak $ERRNO;

# Create a UDP client socket as output??? Bind it to the input socket 
+created
# earlier
my $out_sock = IO::Socket::INET->new(
    PeerAddr => 'localhost',
    PeerPort => $in_sock->sockport(),
    Proto    => 'udp'
) or croak "Failed to bind remote port $in_sock->sockport()";

# Don't really get the mechanics behind these. Just copy and apply for
+ now
threads::async {
    while (<>) {
        $out_sock->send($_);
    }
}
->threads::detach;

# A simple test to prove that it is non-blocking
while (1) {
    sleep 1;
    print "\N{FULL STOP}";
}

1;

[download]
While the script is running, I can even hit Backspace to erase the contents on the screen!

In reply to Re^4: Any event modules that support STDIN polling for Windows? by KHLeow
in thread Any event modules that support STDIN polling for Windows? by KHLeow

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