From: Joel VanderWerf <vjoel@...>
Date: 2002-09-26T03:29:57+09:00
Subject: Re: Newbie, threads

Stathy G. Touloumis wrote:
> Hello,
> 
> I want to start a thread from within the initialize method.  This thread 
> will sleep for a time and then run a method of the Class being 
> instantiated.  How do I refer to the object from within the block being 
> passed to the Thread constructor?
> 
> Currently this is what I have but it would seem to me that 'self' will 
> refer to the thread object.
> 
> def initialize
>   @guard = Thread.new {
>     while 1 do
>       sleep(timout)
>       self.clean
>     end
>   }
> end

The block is a closure, so self, local vars (like timout), and even 
instance vars (like @guard), are in the scope of the initialize method.

-----------
class A
   def initialize
     timout = 1           ### added
     @guard = Thread.new {
       while 1 do
         sleep(timout)
         self.clean
       end
     }
   end

   def clean
     puts "Cleaning..."
   end
end

A.new

sleep(20)
------------

Cleaning...
Cleaning...
Cleaning...