Method dequeue_bulk

deps/concurrentqueue/concurrentqueue.h:1705–1713

		
		template<typename It>
		inline size_t dequeue_bulk(It& itemFirst, size_t max)
		{
			if (isExplicit) {
				return static_cast<ExplicitProducer*>(this)->dequeue_bulk(itemFirst, max);
			}
			else {
				return static_cast<ImplicitProducer*>(this)->dequeue_bulk(itemFirst, max);
			}
		}
		
		inline ProducerBase* next_prod() const { return static_cast<ProducerBase*>(next); }