Thread::Queue

        # Thread::Queue < Object

(from ruby core)
---
The Thread::Queue class implements multi-producer, multi-consumer
queues.  It is especially useful in threaded programming when
information must be exchanged safely between multiple threads. The
Thread::Queue class implements all the required locking semantics.

The class implements FIFO type of queue. In a FIFO queue, the first
tasks added are the first retrieved.

Example:

    queue = Thread::Queue.new

    producer = Thread.new do
      5.times do |i|
         sleep rand(i) # simulate expense
         queue << i
         puts "#{i} produced"
      end
    end

    consumer = Thread.new do
      5.times do |i|
         value = queue.pop
         sleep rand(i/2) # simulate expense
         puts "consumed #{value}"
      end
    end

    consumer.join
---
# Class methods:

    new

# Instance methods:

    <<
    clear
    close
    closed?
    deq
    empty?
    enq
    length
    num_waiting
    pop
    push
    shift
    size