From: matz@... (Yukihiro Matsumoto)
Date: 2001-09-25T22:52:34+09:00
Subject: [ruby-talk:21671] Re: Threads and $SAFE

Hi,

In message "[ruby-talk:21666] Threads and $SAFE"
    on 01/09/25, Carlos <angus@quovadis.com.ar> writes:

|Can I change the $SAFE level in some parts of the script? I want to do
|unsafe operations at the loaded script's demand, but only under my control.
|Something like that:

$SAFE is thread local value, and communication between thread using
Queue permitted, so that set up safe thread for trusted operation, and
untrusted thread ask it via queue.  For example,

  Puts_queue = Queue.new
  Thread.new {
    loop {
      puts "called with #{Puts_queue.pop}"
    }
  }

  Thread.new {
    $SAFE=4
    Puts_queue.push(1)
  }.join

Hope this helps.

							matz.