What you want is threads. Here are an example of how to do this. Note, this script is only for Perl-5.8.0, don't use other version. I recommend that you compile Perl-5.8.0 without PerlIO, because if you are using sockets with PerlIO you will get a lot of bugs! PerlIO is very good, but now it has some bugs to solve (see the perlbug list), we need to wait for Perl-5.8.1 or get the last pathches.

This example show how to use the share resource of threads. If you want a variable that can be shared by the other threads, just declare it like the example, with : share in the end, don't forget to load the module threads::shared!

Other thing, note that the main is another thread too! If it goes out (exit), the other threads will be closed too. To wait a thread use the command join: $thread->join 

#!/usr/bin/perl

  use threads;
  use threads::shared;

  $|=1;
  
  my ($global) : shared ;
  
  my $thr1 = threads->new(\&TEST,1) ;
  my $thr2 = threads->new(\&TEST,2) ;  

  my @ReturnData = $thr1->join ;
  print "Thread 1 returned: @ReturnData\n" ;

  my @ReturnData = $thr2->join ;
  print "Thread 2 returned: @ReturnData\n" ;
  
########
# TEST #
########

sub TEST {
  my ( $id ) = @_ ;
  
  for(0..10) {
    $global++ ;
    print "id: $id >> $_ >> GLB: $global\n" ;
    sleep(1) ;
  }

  return( $id ) ;
}

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Graciliano M. P.
"The creativity is the expression of the liberty".

In reply to Re: How do I run subroutines in parallel? by gmpassos
in thread How do I run subroutines in parallel? by Anonymous Monk

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