Class: SauceTunnel::SimpleQueue

Inherits:
Object
  • Object
show all
Defined in:
lib/sauce_tunnel/simple_queue.rb

Overview

A really basic message queue, which unlike the queue in stdlib makes it possible to specify a timeout for ‘pop`.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ SimpleQueue

Returns a new instance of SimpleQueue.



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# File 'lib/sauce_tunnel/simple_queue.rb', line 5

def initialize
  @mutex = Mutex.new
  @queue = []
  @received = ConditionVariable.new
end

Instance Method Details

#pop(timeout = nil) ⇒ Object 



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# File 'lib/sauce_tunnel/simple_queue.rb', line 18

def pop(timeout = nil)
  @mutex.synchronize do
    start_time = Time.now
    loop do
      if @queue.empty?
        elapsed_time = Time.now - start_time

        raise ThreadError, "queue empty" if elapsed_time >= timeout

        @received.wait(@mutex, timeout - elapsed_time)
      else
        break
      end
    end
    @queue.shift
  end
end

#push(value) ⇒ Object 



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# File 'lib/sauce_tunnel/simple_queue.rb', line 11

def push(value)
  @mutex.synchronize do
    @queue << value
    @received.signal
  end
end