class ConcurrentQueue::Listener

Public Class Methods

new() click to toggle source
# File lib/concurrent_queue/listener.rb, line 4
def initialize
  @condition_variable = ConditionVariable.new
  @mutex = Mutex.new
  @popped = false
  @item = nil
end

Public Instance Methods

add_queue(queue) click to toggle source
# File lib/concurrent_queue/listener.rb, line 24
def add_queue(queue)
  raise unless queue.is_a?(ConcurrentQueue)
  @queues << queue
  nil
end
pop(queues) click to toggle source
# File lib/concurrent_queue/listener.rb, line 30
def pop(queues)
  queues.each { |queue| queue.add_listener(self) }
  @mutex.synchronize do
    @condition_variable.wait(@mutex) unless @popped
  end
  queues.each { |queue| queue.remove_listener(self) }
  @item
end
send(item) click to toggle source
# File lib/concurrent_queue/listener.rb, line 11
def send(item)
  @mutex.synchronize do
    if @popped
      return false
    else
      @item = item
      @popped = true
      @condition_variable.signal
      return true
    end
  end
end