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Internals(3)                         User Contributed Perl Documentation                        Internals(3)



NAME
       Internals - Write-protect variables, manipulate refcounts

SYNOPSIS
         use Internals qw(IsWriteProtected SetReadOnly SetReadWrite GetRefCount SetRefCount);

         use Internals qw(:all);

         $object = My::Class->new(@parameters);

         SetReadOnly($object);

         SetReadWrite($object);

         if (IsWriteProtected($object)) { ... }

         $value = GetRefCount($object);

         SetRefCount($object,$value);

       or

         package My::Class;

         use Internals;

         @ISA = qw(Internals);

         $object = My::Class->new(@parameters)->SetReadOnly();

         $object->SetReadWrite();

         if ($object->IsWriteProtected()) { ... }

         $value = $object->GetRefCount();

         $object->SetRefCount($value);

       or

         use Internals qw(IsWriteProtected SetReadOnly SetReadWrite GetRefCount SetRefCount);

         use Internals qw(:all);

         SetReadOnly(\$scalar);

         SetReadOnly(\@array);

         SetReadOnly(\%hash);

         SetReadOnly(\$hash{$element});

         SetReadOnly(\$reference);

       etc.

DESCRIPTION
       This module allows you to write-protect and write-enable your Perl variables, objects and data
       structures.

       Moreover, the reference count of any Perl variable can be read and set.

       You can never pass the object directly on which to perform the desired action, you always have to
       pass a reference to the variable or data structure in question.

       This comes in handy for objects and anonymous data structures, where you only have a reference
       anyway!

       BEWARE: This module is DANGEROUS!

       DO NOT attempt to unlock Perl's built-in variables!

       DO NOT manipulate reference counts unless you know exactly what you're doing!

       ANYTHING might happen! Hell might break loose! ":-)"

       YOU HAVE BEEN WARNED!

VERSION
       This man page documents "Internals" version 1.1.

AUTHOR
         Steffen Beyer
         mailto:sb@engelschall.com
         http://www.engelschall.com/u/sb/download/

COPYRIGHT
       Copyright (c) 2001 by Steffen Beyer. All rights reserved.

LICENSE
       This package is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself, i.e., under the terms of the "Artistic License" or the "GNU General Public License".

       Please refer to the files "Artistic.txt" and "GNU_GPL.txt" in this distribution for details!

DISCLAIMER
       This package is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
       even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

       See the "GNU General Public License" for more details.



perl v5.16.2                                     2001-09-30                                     Internals(3)