From: Tim Bates <tim@...>
Date: 2004-05-04T07:58:42+09:00
Subject: Re: $SAFE = 3.5?

Mark Hubbart wrote:
>   Safe.level(2) do
>     # unsafe code here
>   end

   class Safe
     def level(lvl)
       th = Thread.new do
         $SAFE = lvl.to_i
         yield
       end
       th.join
     end
   end

Does exactly what you'd expect.

Also, for the original poster's question: one way around the problem is 
to use a setup like the one above, and have the SAFE thread pass the 
content to be written out to another, non-SAFE thread which can sanity 
check it and then write it to the IO.

If you're still confused I could dig up some code where I did some 
playing around with something like this once.

Tim.

-- 
Tim Bates
tim@bates.id.au