$q = new Thread::Queue
Creates a new empty queue. Returns an object representing the queue.
$q->dequeue
Removes and returns a scalar from the head of the queue. If the queue
is empty, dequeue blocks the thread until another
thread enqueue s a scalar on the queue.
$q->dequeue_nb
Like dequeue, but returns undef
if the queue is empty instead of blocking.
$q->enqueue list
Adds the list of scalars, list, to the end
of the queue.
$q->pending
Returns the number of items remaining in the queue.