From: Patrick Hurley <phurley@...>
Date: 2006-04-22T11:54:14+09:00
Subject: Re: Synchronized object

On 4/21/06, David Corbin <dcorbin@machturtle.com> wrote:
> On Friday 21 April 2006 10:47 am, Kroeger, Simon (ext) wrote:
> > Dear ruby-talk,
> >
> > is there a nice, concise way to lock each and
> > every method against all other methods of an object?
> >
> > To elaborate: I want to make sure that only one method of
> > a specific object (not class) can run at a each point in
> > time regardless of how many threads are using this object.
>
> > I would hope there is module i just have to include in
> > my class definition.
> >
> > cheers and thanks
> >
> > Simon
>
> It would be relatively easy to write a class that uses Monitor and delegates
> to specifc object.  Thus, much like Java's Collections.synchronizedFoo, you
> could have
>
> Synchronizer.new(foo) that would synchronize ANY object.
>
> David
>
>

require 'monitor'

class AutoMonitor
  include MonitorMixin

  def initialize(obj)
    mon_initialize
    @obj = obj
  end

  def method_missing(sym, *args, &block)
    synchronize do
      @obj.send(sym, *args, &block)
    end
  end
end

class Class
  def monitored_new(*args, &block)
    AutoMonitor.new(new(*args, &block))
  end
end


Something like this and then you can:

f = Foo.monitored_new

pth