def timeout(seconds, exception=Timeout::Error)
      return yield if seconds.nil? or seconds.zero?
      # raise ThreadError, "timeout within critical session" if Thread.critical
      id = TimeoutHandler.register(seconds, exception)
      begin
        yield(seconds)
      ensure
        TimeoutHandler.cancel(id)
      end
    end
def timeout(seconds, exception=Timeout::Error)
      return yield if seconds.nil? or seconds.zero?
      # raise ThreadError, "timeout within critical session" if Thread.critical
      id = TimeoutHandler.register(seconds, exception)
      begin
        yield(seconds)
      ensure
        TimeoutHandler.cancel(id)
      end
    end
Executes the passed block and raises +exception+ if execution takes more
 than +seconds+.

 If +seconds+ is zero or nil, simply executes the block