I see an issue (actually a crash) on OS X 10.5.5 with my current threading model. see my code snippet below:

use threads;
use threads::shared;
use Thread::Queue;

use Wx;

my %thread_hash;
share(%thread_hash);

# Signal Handler
$SIG{'KILL'} =
    sub {
        # Tell user we've been terminated
        printf("           %3d <- Killed\n", threads->tid());
        # Detach and terminate
        threads->detach() if ! threads->is_detached();
        threads->exit();
    };

# .. frame creation etc.

# two buttons being called to start/stop thread task

EVT_BUTTON( $self, $self->{start}, \&StartExecThread );
EVT_BUTTON( $self, $self->{stop}, \&StopExecThread );

# .. rest of wx code

sub StartExecThread {
    
    my ( $self, $event ) = @_;

    my $threadqueue = Thread::Queue->new();

    my $worker = threads->create('CallThread', $self, $threadqueue );

    $thread_hash{start_queue} = $threadqueue;

    $self->{start_thread} = $worker; 

    $thread_hash{start_queue}->enqueue('GO'); 
}

sub StopExecThread {
    
    my ( $self, $event ) = @_;

    if ($self->{start_thread}->is_running()) {

        # Send a signal to a thread
        print "Killing thread ...\n";
        $self->{start_thread}->kill('KILL');

    # toggle button state while thread after thread is stopped
    $self->{start_button}->Enable(1);
    $self->{stop_button}->Enable(0);
    }
}

sub CallThread {

    my ( $self, $event ) = @_;

    # toggle button state
    $self->{start_button}->Enable(0);
    $self->{stop_button}->Enable(1);

    # ... do some stuff

    # toggle button state
    $self->{start_button}->Enable(1);
    $self->{stop_button}->Enable(0);

}
[download]

If I eliminate the threading aspect from my code it works fine. Am I handling the thread creation incorrectly?

Thanks, -Paul