$my wait_time = XX :shared;
 
        ...
        $heap->{update_config_threads} = POE::Component::Pool::Thread->new(
          # Only one thread at a time...just needs to be nonblocking for other stuff
          MinFree       =>  1,
          MaxFree       =>  1,
          MaxThreads    =>  1,
          StartTheads   =>  1,
          Name          =>  'UpdateThread',
          EntryPoint    =>  \&update_child,
          CallBack      =>  \&update_result_handler,
        );
        $kernel->delay(config_check => $wait_time);
      },
      got_input => sub  {
        my ($kernel, $heap) = @_[KERNEL, HEAP];
        my $input_line = $_[ARG0];
        #print "DEBUG: \$input_line = $input_line\n";
        $kernel->post(InputThread => run => $input_line);
      },

      config_check => sub  {
        my ($kernel, $heap) = @_[KERNEL, HEAP];
        # Pass $kernel in so callback handler can get it and post new $kernel->delay after we're finished
        $kernel->post(UpdateThread => run => ($kernel, $config));
      },

    }
  );

sub update_child  {
  my ($kernel, $input) = @_;
  # BUILD_NEW_CONFIG HERE
  return ($kernel, $new_config);
}

sub update_result_handler {
  my ($kernel, $config = @_[ ARG0, ARG1 ];
  # COPY_CONFIG_TO_SHARED_VAR HERE
  # Then post new $kernel->delay for next update check
  $kernel->delay(config_check => $wait_time);
}


##</code><code>##

Invalid value for shared scalar at /usr/local/share/perl/5.8.7/POE/Component/Pool/Thread.pm line 183.