#!/usr/bin/perl

#-----------------------------------------------------
package p1;
#-----------------------------------------------------

use strict;
use warnings;
use threads;
use threads::shared;

sub new {
  my $class = shift;
  my $self  = { @_ };
  $self->{x2} = $self->{x1};
  return bless $self, $class;
}


sub startThread {

  my $self = shift;
  my $thr;

  share ($self->{x2});

  sub test {
    my $x1 = shift;
    my $r = int(rand()*1000);
    print "$x1: starting thread r=$r \$self{x1}=$self->{x1}\n";
    sleep $r/100;
    print "$x1: setting variable\n";
    $self->{x2} = $r;
    sleep 10;
    print "$x1: closing thread \$self{x2}=$self->{x2}\n";
    threads->exit();
  };

  print "threads->create \$self{x1}=$self->{x1}\n";
  $thr = threads->create('test', $self->{x1});
  $thr->detach();
}


#-----------------------------------------------------
package main;
#-----------------------------------------------------

use strict;
use warnings;

my $objA = p1->new( x1 => 'A' );
my $objB = p1->new( x1 => 'B' );
my $objC = p1->new( x1 => 'C' );

print "    $objA->{x1}=$objA->{x2} $objB->{x1}=$objB->{x2} $objC->{x1}=$objC->{x2}\n";

$objA->startThread();
$objB->startThread();
$objC->startThread();

for (my $i = 1; $i < 15; $i++) {
  print "    $objA->{x1}=$objA->{x2} $objB->{x1}=$objB->{x2} $objC->{x1}=$objC->{x2}\n";
  sleep 2;
}