From: "Morris, Chris" <chris.morris@...>
Date: 2002-05-31T22:14:32+09:00
Subject: RE: Threading question

>  Well, ruby use qsort(). a C function can't be interrupted, 
> this mean that
>  other threads are blocked when qsort() run.
> 
>  If a thread can run before or after qsort(), this thread 
> can't modify the
>  array because ruby use a special flag
> 
>     FL_SET(ary, ARY_TMPLOCK);	/* prohibit modification during sort */

Ah, so my assumption about Ruby threading is wrong(?) -- it just works out
in my case. In other words, Ruby makes the sort call thread-safe, though
Array itself as a whole is not (which you showed me with a previous post
http://ruby-talk.com/40317).

Chris