Gecko [ fernandoquevedodop.com ]

Name	Size	Permission
deferrable	[ DIR ]	drwxr-xr-x
protocols	[ DIR ]	drwxr-xr-x
buftok.rb	2.13 KB	-rw-r--r--
callback.rb	2.14 KB	-rw-r--r--
channel.rb	1.53 KB	-rw-r--r--
completion.rb	9.71 KB	-rw-r--r--
connection.rb	33.41 KB	-rw-r--r--
deferrable.rb	7.8 KB	-rw-r--r--
file_watch.rb	2 KB	-rw-r--r--
future.rb	1.83 KB	-rw-r--r--
io_streamer.rb	1.86 KB	-rw-r--r--
iterator.rb	7.04 KB	-rw-r--r--
messages.rb	2.77 KB	-rw-r--r--
pool.rb	4.1 KB	-rw-r--r--
process_watch.rb	1.24 KB	-rw-r--r--
processes.rb	3.66 KB	-rw-r--r--
protocols.rb	1.5 KB	-rw-r--r--
pure_ruby.rb	34.87 KB	-rw-r--r--
queue.rb	2.06 KB	-rw-r--r--
resolver.rb	4.76 KB	-rw-r--r--
spawnable.rb	2.12 KB	-rw-r--r--
streamer.rb	3.59 KB	-rw-r--r--
threaded_resource.rb	2.8 KB	-rw-r--r--
tick_loop.rb	2.09 KB	-rw-r--r--
timers.rb	1.29 KB	-rw-r--r--
version.rb	50 B	-rw-r--r--

Code Editor : tick_loop.rb

module EventMachine
  # Creates and immediately starts an EventMachine::TickLoop
  def self.tick_loop(*a, &b)
    TickLoop.new(*a, &b).start
  end

# A TickLoop is useful when one needs to distribute amounts of work
  # throughout ticks in order to maintain response times. It is also useful for
  # simple repeated checks and metrics.
  # @example
  #    # Here we run through an array one item per tick until it is empty, 
  #    # printing each element.
  #    # When the array is empty, we return :stop from the callback, and the
  #    # loop will terminate.
  #    # When the loop terminates, the on_stop callbacks will be called.  
  #    EM.run do
  #      array = (1..100).to_a
  #      
  #      tickloop = EM.tick_loop do
  #        if array.empty?
  #          :stop
  #        else
  #          puts array.shift
  #        end
  #      end
  #      
  #      tickloop.on_stop { EM.stop }
  #    end
  #
  class TickLoop

# Arguments: A callback (EM::Callback) to call each tick. If the call
    # returns +:stop+ then the loop will be stopped. Any other value is 
    # ignored.
    def initialize(*a, &b)
      @work = EM::Callback(*a, &b)
      @stops = []
      @stopped = true
    end

# Arguments: A callback (EM::Callback) to call once on the next stop (or
    # immediately if already stopped).
    def on_stop(*a, &b)
      if @stopped
        EM::Callback(*a, &b).call
      else
        @stops << EM::Callback(*a, &b)
      end
    end

# Stop the tick loop immediately, and call it's on_stop callbacks.
    def stop
      @stopped = true
      until @stops.empty?
        @stops.shift.call
      end
    end

# Query if the loop is stopped.
    def stopped?
      @stopped
    end

# Start the tick loop, will raise argument error if the loop is already
    # running.
    def start
      raise ArgumentError, "double start" unless @stopped
      @stopped = false
      schedule
    end

private
    def schedule
      EM.next_tick do
        next if @stopped
        if @work.call == :stop
          stop
        else
          schedule
        end
      end
      self
    end
  end
end

${this.title}

Code Editor : tick_loop.rb