From: ara.t.howard@...
Date: 2006-07-06T07:39:00+09:00
Subject: Re: thread mystery

On Thu, 6 Jul 2006, Tom Rauchenwald wrote:

> ara.t.howard@noaa.gov writes:
>
>> any idea why this script slows downs drastically as it runs and seems to leak
>> memory?
>
> First, I'm not a Ruby expert or something, but..
>
> [Code skipped]
>
>> switch = Switch.new
>
> Here you create the switch.
>
>> toggle = SwitchToggle.new switch
>
> Here, toggle is created and registered as listener (in the constructor)
>
>> switch.on!
>
> So now you switch it on.
> Toggle gets notified, and creates a thread that switches it off.
> But when that Thread switches it off, toggle gets notified, and starts a
> thread that switches it on again..
> Basically it's an infinite loop, and i suspect it's leaking because GC
> doesn't kick in.

it would be, but the synchronize prevents two threads from entering any of the
Switch methods at a time so only thread can actually be running at once.

-a
-- 
suffering increases your inner strength.  also, the wishing for suffering
makes the suffering disappear.
- h.h. the 14th dali lama