Then I'm afraid I have bad news - you cannot do what you're trying to do, the way you're trying to do it. A module is 'static' code - it's imported by your subs when you start them, but it doesn't have any persistent state.

You may wish to consider reading from a file. At the most basic this goes like (and please note - this is very basic, there's no error or integrity checking):

{ 
  my $state_file = "current_masterid.txt";
  my $MASTERLOGFILE;
  my $MASTERID;
  sub save_masterid
  {
    if ( defined $MASTERID ) 
    {
      open ( my $output_fh, ">", $state_file );
      print $output_fh $masterid;
      close ( $output_fh );
    }
  }
  
  sub load_masterid
  {
    if ( -f $state_file )
    {
      open ( my $input_fh, "<", $state_file );
      $MASTERID = <$input_fh>;
      close ( $input_fh );
    }
    else
    {
      $MASTERID = "00000000";
      $MASTERLOGFILE = "LOGFILE not defined";
      &save_masterid()
    }
  }
  
  sub get_masterid 
  {
    &load_masterid() unless defined $MASTERID;
    return $MASTERID;
  }
  
  sub set_masterid
  {
    ( $MASTERID ) = @_;
    &save_masterid();
  }
}

[download]

In reply to Re^3: Need to share and modify global variables across modules and packages. by Preceptor
in thread Need to share and modify global variables across modules and packages. by mathew_p_a

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.