From: Erik Veenstra <erikveen@...>
Date: 2007-02-16T18:31:31+09:00
Subject: Re: Thread.current.parent and Thread.current.ancestors

Using new_with_parent (see below) has two advantages:

* By calling new_with_parent, you're saying: Yes, I know that
  parent doesn't work for all threads.

* Thread#parent doesn't return nil for "unpatched" threads,
  since it doesn't exist in the first place.

You can achieve the same by subclassing Thread.

Disadvantage:

* You can only ask for parents of your own threads. You can't
  ask for a parent of e.g. a DRb thread, since those aren't
  patched.

gegroet,
Erik V. - http://www.erikveen.dds.nl/

----------------------------------------------------------------

 class Thread
   def self.new_with_parent(*args, &block)
     parent = Thread.current

     self.new do
       define_method :parent do
         parent
       end

       block.call(*args)
     end
   end
 end

----------------------------------------------------------------