_id2ref in finalize or how get object.var from class.finalize

ruby-talk
1

Hi, all.

#!/usr/bin/ruby1.8

include ObjectSpace

class MyClass
   attr_reader :var
   def initialize(var)
      @var = var
      puts "from initialize: #{@var}"
      define_finalizer(self, self.class.method(:finalize).to_proc)
   end

   def MyClass.finalize(object_id)
      o = _id2ref(object_id)
      puts "from finalize: #{o.var}"
   end
end # class Storage

o = MyClass.new("The Value!")
exit 0

Why lines of a code after a call of function "_id2ref(object_id)" are
never carried out?

How it is possible to get access to variables or methods of a object
from a method of a class :finalize?

···

--
    Andrew Nikitin

2

Hi,

At Sun, 16 Dec 2007 03:53:49 +0900,
Andrey Nikitin wrote in [ruby-talk:283702]:

   def MyClass.finalize(object_id)
      o = _id2ref(object_id)
      puts "from finalize: #{o.var}"
   end

Finalizer is called after the object was disposed. So _id2ref
raises an exception.

How it is possible to get access to variables or methods of a object
from a method of a class :finalize?

It does not exist at that moment any more.

···

--
Nobu Nakada