Method ImplicitProducer

deps/concurrentqueue/concurrentqueue.h:2408–2414

	struct ImplicitProducer : public ProducerBase
	{			
		ImplicitProducer(ConcurrentQueue* parent_) :
			ProducerBase(parent_, false),
			nextBlockIndexCapacity(IMPLICIT_INITIAL_INDEX_SIZE),
			blockIndex(nullptr)
		{
			new_block_index();
		}
		
		~ImplicitProducer()
		{