From: Paul Brannan <paul@...>
Date: 2002-03-28T23:26:22+09:00
Subject: Re: Threads in Iterators

On Thu, Mar 28, 2002 at 11:44:20AM +0900, Norman Makoto Su wrote:
> My concern is if there is a chance that two yields will happen at the
> same time and mess things up (vals will be corrupted).  Is this
> possible?

If you are concerned about this, then use a mutex around code that might
corrupt your data:

  m = Mutex.new
  arr.each do |val|
    @mutex.synchronize do
      vals << val
    end
  end

I think appending onto vals like this should be an atomic operation (so
the mutex isn't necessary), but if you had a non-atomic operation, then
you would definitely need a mutex.

Paul