Hi Monks, Need an help here, i am using multi-threaded perl script, where i am calling an subroutine in which its accessing global variable defined in main function, now problem is that all threads are accessing this variable at same time, and i want this variable to be incremented each time this subrountine is called from main script, how can i do this below is the code for this 

use threads;
my @arr = (1,2,3,4);
my $outnumber=1;

print "\n variable outside thread that is in main program $outnumber\n
+";
my @threads;
foreach (@arr) {
   push @threads, threads->new(\&doSomething, $_, $outnumber);
}
foreach (@threads) {
   $_->join();
}

sub doSomething ()
{
  my ($thread)=@_;

  lock $outnumber;
  my $intervariable=$outnumber;
    print "\n Before increment is $intervariable\n";
    ++$intervariable;
    
    print "\n After increment is $intervariable\n";
    print "thread $thread\n";

}

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In reply to Multi-threaded script by dvinay

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