vlingvo has asked for the wisdom of the Perl Monks concerning the following question:

Hi All, I am writing fairly large program using ActiveState Perl 5.8 build 806 Win2k, and when i am trying to use threads i got this error : Free to wrong pool 15dda38 not 15d4240 during global destruction Threads created o.k but it happens when i try to join them i have this error and it just dies . I have scaled down my program to provide test case to test problem.please remember this is a test case so there no much sence in it :)
Thanks 

use strict;
use threads;

mxu_install();

sub mxu_install
{
    my $count=0;
    my $kit_temp=$ARGV[0];
    if(!opendir(MXU_DIR,"$kit_temp/MXU"))
    {
    print "Can't open $kit_temp/MXU: $!";
    }
    
    while( defined (my $file = readdir MXU_DIR) ) 
    {
    next if $file =~ /^\.\.?$/;
    install_mxu_comp();
    return;    
    }
    closedir(MXU_DIR);
}

sub install_mxu_comp
{
    my $count=0;
    $|=1;
    my $thread1 = threads->new(\&blah);
    my $thread2=threads->new(\&blah);
    $thread1->join();
    $thread2->join();
    print "Father exiting\n";
    return 0;
}
sub blah
{
    print "inthread\n";
    sleep(5);
}

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Replies are listed 'Best First'.
Re: threads problem
by nite_man (Deacon) on Jul 23, 2003 at 13:53 UTC
    Try to look at this topic, maybe it will help you resolve your problem. 
          
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SV* sv_bless(SV* sv, HV* stash);
[reply]
      Thanks , I tryed to modify my code and when i remove directory part completly it works.it doesn't make sense to me.
[reply]
Re: threads problem
by Anonymous Monk on Jul 23, 2003 at 14:53 UTC
    I changed my code so filedescriptor will be closed before threads starts and it works , so why this strange behavier ? i thought that filedescriptors r duped per thread on windows 
    use strict;
use warnings;
use threads;

mxu_install();

sub mxu_install
{
    my $count=0;
    my $kit_temp=$ARGV[0];
    if(!opendir(MXU_DIR,"$kit_temp/MXU"))
    {
    print "Can't open $kit_temp/MXU: $!";
    }
    

    
   while( defined (my $file = readdir MXU_DIR) ) 
    {
    next if $file =~ /^\.\.?$/;
    }
    
    closedir(MXU_DIR);
    install_mxu_comp();
    return;    
    
}

sub install_mxu_comp
{
    my $count=0;
    $|=1;
    my $thread1 = threads->new(\&blah);
    my $thread2=threads->new(\&blah);
    $thread1->join();
    $thread2->join();
    print "Father exiting\n";
    return 0;
}
sub blah
{
    print "inthread\n";
    sleep(5);
}

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