__vb2_queue_free
__vb2_queue_free(q, first_index, allocated_buffers);
__vb2_queue_free(q, *first_index, allocated_buffers);
__vb2_queue_free(q, start, count);
__vb2_queue_free(q, 0, q->max_num_buffers);
__vb2_queue_free(q, 0, q->max_num_buffers);