From: Amos King <amos.l.king@...>
Date: 2007-04-24T02:24:05+09:00
Subject: Re: threads demo from pickaxe book - newbie question

The super call is calling the initialize function in The base class,
in this case Monitor

On 4/23/07, Christopher Rose <chrisrose.chrisrose@gmail.com> wrote:
> All,
>
> Please forgive a newbie question - I have tried searching for errata on
> the Pickaxe book (2nd ed) but not found an answer.  I am running Ruby
> 1.8.2 on WinXP.  I type in, or source from file, the example - from pg.
> 143, copied below - into the interactive ruby prompt in the fxri tool.
> I get to the line
>
> t1.join ; t2.join
>
> and the tool hangs.  Is this expected?  Is there some better way(s) to
> debug thread-related issues?  Thanks for any advice -
>
> Chris
>
> P.S. Could someone please explain the purpose of the 'super' command in
> this script?  Thx -
>
> -----------------------<begin example pg. 143>----------------------
>
>
>
> # with my current version of fxri, this hangs
>  require 'monitor'
>  class Counter < Monitor
>   attr_reader :count
>   def initialize
>     @count = 0
>     super
>   end
>   def tick
>     synchronize do
>       @count += 1
>     end
>   end
>  end
>
>  c = Counter.new
>  t1 = Thread.new { 100_000.times { c.tick } }
>  t2 = Thread.new { 100_000.times { c.tick } }
>
>  t1.join ; t2.join
>
>  c.count
>
> --
> Posted via http://www.ruby-forum.com/.
>
>


-- 
Amos King
Ramped Media
USPS
Programmer/Analyst
St. Louis, MO
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