From: Michael Neumann <uu9r@...>
Date: 2002-05-27T21:33:45+09:00
Subject: Re: SizedQueue.new(0)

On Mon, May 27, 2002 at 09:12:35PM +0900, Lars Christensen wrote:
> 
> Is this a bug in Ruby or my brain? :-)
> 
> $ sizedqueue.rb 
> quire 'thread.rb'
> q = SizedQueue.new(0)
> Thread.start { q.pop }
> q.push 1 

Maybe it has something to do that you define an empty queue? 

This works:

q = SizedQuere.new(n)  # n > 0 


> $ ruby sizedqueue.rb 
> deadlock 0x80fb99c: 2:0  - /pack/ruby-1.6.7/lib/ruby/1.6/thread.rb:184
> deadlock 0x8105d98: 2:0 (main) - /pack/ruby-1.6.7/lib/ruby/1.6/thread.rb:253
> /pack/ruby-1.6.7/lib/ruby/1.6/thread.rb:253:in `stop': Thread: deadlock (fatal)
>         from /pack/ruby-1.6.7/lib/ruby/1.6/thread.rb:253:in `push'
>         from sizedqueue.rb:4
> 
> Or is there an easier way to do job/thread multiplexing without a queue? I.e.
> to have all pushers block until someone pops.

-- 
Michael Neumann  ***  eMail uu9r@rz.uni-karlsruhe.de