lib/queue_classic/worker.rb
def fork_and_work
      cpid = fork {setup_child; work}
      log(:at => :fork, :pid => cpid)
      Process.wait(cpid)
    end
def fork_and_work
      cpid = fork {setup_child; work}
      log(:at => :fork, :pid => cpid)
      Process.wait(cpid)
    end
Calls Worker#work but after the current process is forked.
 The parent process will wait on the child process to exit.