From: Joel VanderWerf <vjoel@...>
Date: 2003-10-10T00:49:41+09:00
Subject: Re: Standard Queue Implementation and Thread Safety

nobu.nokada@softhome.net wrote:
> Hi,
> 
> At Thu, 9 Oct 2003 14:03:13 +0900,
> Joel VanderWerf wrote:
...
>>I understand that Array#push could provoke a GC, but why would GC cause 
>>a context-switch?
> 
> 
> Though, finalizers could interrupt.  Since they run in same
> thread and critical section so context won't switch, but they
> may try to modify the object.
> 
> $ ulimit -v 10240
> $ ruby
>   array = Array.new(100, nil)
>   while array.size > 10
>     ObjectSpace.define_finalizer(Array.new(100000, nil)) {array.clear}
>     p array.push(nil).size
>   end

Thanks, Nobu. I feel safer now, since I always regard finalizers with 
suspicion, anyway.