foreach my $dthread(1..$numworkers){
 share ($shash{$dthread}{'go'});
 share ($shash{$dthread}{'data'});
 share ($shash{$dthread}{'pid'});
 share ($shash{$dthread}{'die'});

 $shash{$dthread}{'go'} = 0;
 $shash{$dthread}{'data'} = $data;
 $shash{$dthread}{'pid'} = -1;
 $shash{$dthread}{'die'} = 0;
 $hash{$dthread}{'thread'} = threads->new(\&work,$dthread);
}

sub work{
  my $dthread = shift;
    $|++;
    while(1){
       if($shash{$dthread}{'die'} == 1){ goto END };

       if ( $shash{$dthread}{'go'} == 1 ){

    eval( system( $shash{$dthread}{'data'} )    );

   foreach my $num (1..100){
          $shash{$dthread}{'progress'} = $num;
       print "\t" x $dthread,"$dthread->$num\n";
       select(undef,undef,undef, .5);
       if($shash{$dthread}{'go'} == 0){last}
       if($shash{$dthread}{'die'} == 1){ goto END };
       }

    $shash{$dthread}{'go'} = 0; #turn off self before returning       
       }else
         { sleep 1 }
    }
END:
}