From: ara.t.howard@...
Date: 2006-08-26T01:07:08+09:00
Subject: Re: How are the object_ids generated/assigned to objects?

On Sat, 26 Aug 2006, Pavel Smerk wrote:

> Hello,
>
> assume some multithreaded application, thread1 starts and finishes, then 
> thread2 starts --- how is the possibility that these two threads will have 
> the same object_id? On what it depends?
>
> Thanks,
>
> P.

interesting question!

   harp:~ > cat a.rb
   h = {}
   loop{ tid = Thread.new{}.object_id; (warn h.size.to_s and h.delete(tid)) if h[tid]; h[tid] = true }


   harp:~ > ruby a.rb 2>&1|head
   4344
   4344
   5428
   5428
   5428
   5428
   6510
   6510
   6510
   6510

looks like they recycle every few thousand threads - depending on how long the
threads run of course.

cheers.

-a
-- 
to foster inner awareness, introspection, and reasoning is more efficient than
meditation and prayer.
- h.h. the 14th dalai lama