Hi All.
I am writing a perl program that will read a list of configuration files in a directory and open a separate thread for each file. This thread sub will open a UDP socket, send a special message, and wait TIMEOUT time for response. After opening all the threads I am waiting to all the threaded subs to finish. Here is a snippet of the code (In which I suspect I have a problem): 
my @threads;
my $thread;
my $rc;
while (@threads = threads->list()) {
    foreach $thread (@threads) {
        if ($thread->is_joinable()) {
            $rc = $thread->join();
            
            # Send the opcmon
            # $rc->[0] is the return code.
            # $rc->[1] is the nodeName the thread worked on.
            &sendOpcmon($tag, $rc->[0], $rc->[1]);
        }
    }
    
    # To prevent the hard CPU lookups
    sleep(1);
}

#
sub sendRequest {
        require IO::Socket::INET;
        #IO::Socket::INET->import(...);

        my ($msg, $peerAddr, $peerPort) = @_;
    my $eTime = time() + TIMEOUT;
    my $host = (split/\./, $msg)[0];
    
    # configure the socket.
    $MySocket = new IO::Socket::INET->new(    PeerPort => $peerPort,
                            Proto => 'udp',
                            PeerAddr => $peerAddr,
                            );
    ioctl($MySocket, 0x8004667e, pack("I", 1));
    
    # Send the request.
    $MySocket->send($msg);

    # Now we will wait till the server will respond to our request.
    while(time() < $eTime)
    {
        $MySocket->recv($text,128);
        if($text =~ /OK/) {
            return [1, $host];
        }
        
        # Sleep for 2 secs just to free up a %CPU usage
        sleep 2;
    }
    
    # We reached the timeout, probably no response will arrive.
    return [0, $host];
}

[download]
Unfortunately my code crashes the interpreter (in the $thread->join() call) with the error: "Free to wrong pool 1825cf0 not ff during global destruction".
I read some questions related to this issues here in the forum but unfortunately couldn't find a solution.
Can it be that IO::Socket::INET isn't threadsafe ?
If so, what is the best way to implement that ?

In reply to win32 threads problem by leonidlm

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.