I'm trying to speed up some conversions from html to wordXML by using threads. I was hoping it would be fairly straightforward to spawn several threads with Microsoft word running from each one, but my code for threads throws errors:

use strict;
use threads;
use Win32::OLE;

my $threadNum = 2;
my $directoryLocation = 'C:\Users\nate\Desktop\websites';#

opendir(DIR, $directoryLocation);
my @files = grep(/\.html$/,readdir(DIR));
closedir(DIR);
my @threads;
my $counter = 0;
for(1..$threadNum){
    my @fileSlice = @files[$counter..$counter+$#files/$threadNum];
    push @threads, threads->create(\&convertToWord,@fileSlice);
    $counter += $#files/$threadNum+1;
}
$_->join for(@threads);

sub convertToWord(){
    my $Word = Win32::OLE->new('Word.Application', 'Quit');
    #convert some stuff to wordXML here, not shown to save space
}

[download]

Actually, the line about starting Microsoft word isn't needed to make the program fail. The perl interpreter crashes and prints the following:

Free to wrong pool 25f3778 not 213fd8 during global destruction.

When I say crash, I don't mean that the program just exits early, I mean that a window pops up telling me that the Perl Command Line Interpreter has stopped working. Any suggestions?

In reply to How to use Threads by nglenn

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