# runners = []
# cores.each do |c|
#   in = pipes[c][0]
#   out = pipes[c][1]
#   runners << TestRunner.new(in, out)
# end
#
# files = [ ... ]
# results = []
#
# runners.each do |r|
#   Thread.new do
#     while !files.empty?
#       results << r.run_file(files.pop)
#     end
#     r.shutdown
#   end
# end
#
# puts results.join("\n")
#


# Master
# boot up workers
# listen for worker messages
# add worker messages to message queue
# process message queue
# "reply" to a message allows sending a message back down to worker
#
# When worker asks for file but no files left, send shutdown message to worker
# when worker connection breaks, end thread
# wait on all threads
# when all threads are done, all workers must be done
#
#
# Worker
# boot up runners
# listen for runner messages
# add runner messages to message queue
# process message queue
# "reply" to a message allows sending message back down to runner
#
# when a runner asks for file but master responds with shutdown, mark self
#   as terminated, shut down runners. Any runner that asks for a file is
#   auto-terminated
# wait for runner threads to finish
# then exit, breaking master connection
#
# Runner
# when booted, ask for a file
# then process messages on the queue
# when it's a file, run it and send a results message
# when it's a shutdown, break main loop