+#define GRAY_OBJECT_ENQUEUE_SERIAL(queue, obj, desc) (GRAY_OBJECT_ENQUEUE (queue, obj, desc, FALSE))
+#define GRAY_OBJECT_ENQUEUE_PARALLEL(queue, obj, desc) (GRAY_OBJECT_ENQUEUE (queue, obj, desc, TRUE))
+#define GRAY_OBJECT_DEQUEUE_SERIAL(queue, obj, desc) (GRAY_OBJECT_DEQUEUE (queue, obj, desc, FALSE))
+#define GRAY_OBJECT_DEQUEUE_PARALLEL(queue, obj, desc) (GRAY_OBJECT_DEQUEUE (queue, obj, desc, TRUE))
+