NAME

Safe::Hole - make a hole to the original main compartment in the Safe compartment

SYNOPSIS

  use Safe;
  use Safe::Hole;
  $cpt = new Safe;
  $hole = new Safe::Hole;
  sub test { Test->test; }
  $Testobj = new Test;
  # $cpt->share('&test');  # alternate as next line
  $hole->wrap(\&test, $cpt, '&test');
  # ${$cpt->varglob('Testobj')} = $Testobj;  # alternate as next line
  $hole->wrap($Testobj, $cpt, '$Testobj');
  $cpt->reval('test; $Testobj->test;'); 
  print $@ if $@;
  package Test;
  sub new { bless {},shift(); }
  sub test { my $self = shift; $self->test2; }
  sub test2 { print "Test->test2 called\n"; }

DESCRIPTION

  We can call outside defined subroutines from the Safe compartment
using share(), or can call methods through the object that is copied into 
the Safe compartment using varglob(). But that subroutines or methods 
are executed in the Safe compartment too, so they cannot call another 
subroutines that are dinamically qualified with the package name such as 
class methods.
  Through Safe::Hole, we can execute outside defined subroutines in the 
original main compartment from the Safe compartment. 

Methods

new [NAMESPACE]

Class method. Constructor. NAMESPACE is the alternate root namespace that makes the compartment in which call() method execute the subroutine. Default of NAMESPACE means 'main'. We use the default usually.

call $coderef [,@args]

Object method. Call the subroutine refered by $coderef in the compartment that is specified with constructor new. @args are passed to called $coderef.

wrap $ref [,$cpt ,$name]

Object method. If $ref is a code reference, this method returns the anonymous subroutine reference that calls $ref using call() method of Safe::Hole (see above). If $ref is a class object, this method makes a wrapper class of that object and returns a new object of the wrapper class. Through the wrapper class, all original class methods called using call() method of Safe::Hole. If $cpt as Safe object and $name as subroutine or scalar name specified, this method works like share() method of Safe. When $ref is a code reference $name must like '&subroutine'. When $ref is a object $name must like '$var'. Name $name may not be same as referent of $ref. For example: $hole->wrap(\&foo, $cpt, '&bar'); $hole->wrap(sub{...}, $cpt, '&foo'); $hole->wrap($objfoo, $cpt, '$objbar');

root

Object method. Return the namespace that is specified with constructor new.

Warning

You MUST NOT share the Safe::Hole object with the Safe compartment. If you do it the Safe compartment is NOT safe.

AUTHOR

Sey Nakajima <sey@jkc.co.jp>

SEE ALSO

Safe(3).