From: Ilan Berci <coder68@...>
Date: 2009-02-04T23:46:51+09:00
Subject: Re: Using a Class (not an instance) into threads

I単aki Baz Castillo wrote:

> 
> 
> So I wonder how could I use this class into a threaded program. AFAIK
> a singleton class is the Class itself, so if a running thread modifies
> some singleton attribute then all the other threads will see that
> change (error!!!).
> 
> Am I right? How could I achieve it?
> 

This is not an example of a "singleton class".  It is merely a class 
with static methods which means that you don't have to make an instance 
prior to using it.  If the class that Ragel populated has no state 
(which I don't believe it does) then it can safely be used in a threaded 
context.

If you need further examples, please check out all the class level 
methods in Math

=================================================================
As for "singleton class", The class is not the object itself as you 
stated, but a class created solely for that instance.

class Foo
end

f = Foo.new
def f.poo
1
end

f.class  <== Foo
f.poo   <=== 1
Foo.new.poo  <==  undefined method!


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