C:\test>perl -c 632320.pl
Global symbol "$i" requires explicit package name at 632320.pl line 17.
Global symbol "$i" requires explicit package name at 632320.pl line 17.
Global symbol "$i" requires explicit package name at 632320.pl line 17.
Global symbol "$i" requires explicit package name at 632320.pl line 18.
Global symbol "$i" requires explicit package name at 632320.pl line 22.
Global symbol "$i" requires explicit package name at 632320.pl line 22.
Global symbol "$i" requires explicit package name at 632320.pl line 22.
Global symbol "$i" requires explicit package name at 632320.pl line 23.
Global symbol "$i" requires explicit package name at 632320.pl line 24.
Global symbol "$i" requires explicit package name at 632320.pl line 24.
Global symbol "$i" requires explicit package name at 632320.pl line 25.
Global symbol "$i" requires explicit package name at 632320.pl line 34.
Global symbol "$i" requires explicit package name at 632320.pl line 34.
Global symbol "$i" requires explicit package name at 632320.pl line 34.
Global symbol "$i" requires explicit package name at 632320.pl line 35.
Global symbol "$inPattQty" requires explicit package name at 632320.pl line 69.
Global symbol "$outPattQty" requires explicit package name at 632320.pl line 69.
syntax error at 632320.pl line 73, near ") {"
632320.pl has too many errors.

##</code><code>##

#/usr/bin/perl -w

use strict;
use threads;
use threads::shared;
use Thread::Queue;
use Win32::Console;

my $CONSOLE = Win32::Console->new(STD_OUTPUT_HANDLE);
my $CURRENT_ROW = 3;
my @consoleInfo = $CONSOLE->Info();
my $statusRow = $consoleInfo[$CURRENT_ROW];

my $numthreads = 4;

my @DataQueues; #There are n+1 queues (mileposts vs. miles).
for (my $i = 0; $i <= $numthreads  + 1; $i++) {
   $DataQueues[$i] = Thread::Queue->new;
}

my @aThreads;
for (my $i=0;  $i <= $numthreads; $i++) {
   $aThreads[$i] = threads->new(
       \&threadprocessor, $DataQueues[$i], $DataQueues[$i+1], $i
   );
}

#put first (empty) solution on the first queue
my $hrefSolution = &share({});
$DataQueues[0]->enqueue($hrefSolution);
$DataQueues[0]->enqueue(undef);

#wait for threads to exit.
for (my $i=0; $i<=$#aThreads; $i++) {
    $aThreads[$i]->join;
}

#dequeue from the last queue of the chain
my $Solutionref;
my %Solution;
print "\nresults: \n";
while ($Solutionref = $DataQueues[$#DataQueues]->dequeue) {
    %Solution = %{$Solutionref};
    printSolution (\%Solution);
}
print "\n";


sub printSolution {
    my $href = shift;
    print "\nKEYS: ";
    print(($_).' ') foreach (sort keys %{$href});
    print "\nvals: ";
    print(($$href{$_}).' ') foreach (sort keys %{$href});
    print "\n";
}

sub isSolution{ 1 }

sub threadprocessor {
    my ($inqueue, $outqueue, $threadNum) = @_;
    my $inSolnQty = 0;
    my $outSolnQty = 0;
    my $statString;
    my $threadStatusColumn = $threadNum * 12;
    my $inSolutionref;
    my %inSolution;
    my $outSolutionref;
    my %outSolution;
    while ($inSolutionref = $inqueue->dequeue) {
        $statString = sprintf ("%5s/%-5s", $inSolnQty++, $outSolnQty );
        $CONSOLE->WriteChar($statString, $threadStatusColumn, $statusRow);
        %inSolution = %{$inSolutionref};
        while (<>) {                   #ok, I'm hiding complexity here
            if (isSolution($_)) {     #ok, I'm hiding complexity here
                $outSolutionref = &share({});
                %$outSolutionref = (%inSolution);
                                      #ok, I'm hiding complexity here
                $outqueue->enqueue($outSolutionref);
                $statString = sprintf ("%5s/%-5s", $inSolnQty, $outSolnQty++);
                $CONSOLE->WriteChar($statString, $threadStatusColumn, $statusRow);
            }
        }
    }
    $outqueue->enqueue(undef);
    $statString = sprintf ("%5s/%-5s.", $inSolnQty, $outSolnQty);
    $CONSOLE->WriteChar($statString, $threadStatusColumn, $statusRow)
}