Class: Bunny::Concurrent::ContinuationQueue

Inherits:
Object
  • Object
show all
Defined in:
lib/bunny/concurrent/continuation_queue.rb

Overview

Continuation queue implementation for MRI and Rubinius

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ContinuationQueue

Returns a new instance of ContinuationQueue.



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# File 'lib/bunny/concurrent/continuation_queue.rb', line 11

def initialize
  @q    = []
  @lock = ::Mutex.new
  @cond = ::ConditionVariable.new
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/bunny/concurrent/continuation_queue.rb', line 49

def clear
  @lock.synchronize do
    @q.clear
  end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bunny/concurrent/continuation_queue.rb', line 55

def empty?
  @q.empty?
end

#poll(timeout_in_ms = nil) ⇒ Object 



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# File 'lib/bunny/concurrent/continuation_queue.rb', line 29

def poll(timeout_in_ms = nil)
  timeout_in_sec = timeout_in_ms ? timeout_in_ms / 1000.0 : nil

  @lock.synchronize do
    started_at = Bunny::Timestamp.monotonic
    while @q.empty?
      wait = !(timeout_in_sec.nil?)
      @cond.wait(@lock, timeout_in_sec)

      if wait
        ended_at = Bunny::Timestamp.monotonic
        elapsed = ended_at - started_at
        raise ::Timeout::Error if (elapsed > timeout_in_sec)
      end
    end
    item = @q.shift
    item
  end
end

#pop ⇒ Object 



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# File 'lib/bunny/concurrent/continuation_queue.rb', line 25

def pop
  poll
end

#push(item) ⇒ Object Also known as: << 



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# File 'lib/bunny/concurrent/continuation_queue.rb', line 17

def push(item)
  @lock.synchronize do
    @q.push(item)
    @cond.signal
  end
end

#size ⇒ Object Also known as: length 



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# File 'lib/bunny/concurrent/continuation_queue.rb', line 59

def size
  @q.size
end