abepetrillo/evergreen

module Evergreen
  class << self

    ##
    # Provides timeout similar to standard library Timeout, but avoids threads
    #
    def timeout(seconds = 1, error_message = nil, &block)
      start_time = Time.now

      result = nil

      until result
        return result if result = yield

        delay = seconds - (Time.now - start_time)
        if delay <= 0
          raise TimeoutError, error_message || "timed out"
        end

        sleep(0.05)
      end
    end

  end
end