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/*
 * Scala (https://www.scala-lang.org)
 *
 * Copyright EPFL and Lightbend, Inc.
 *
 * Licensed under Apache License 2.0
 * (http://www.apache.org/licenses/LICENSE-2.0).
 *
 * See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 */

package scala.collection.concurrent;

import java.lang.Object;

import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;

abstract class INodeBase extends BasicNode {

    @SuppressWarnings("unchecked")
    public static final AtomicReferenceFieldUpdater, MainNode> updater =
            AtomicReferenceFieldUpdater.newUpdater((Class>) (Class) INodeBase.class, (Class>) (Class) MainNode.class, "mainnode");

    static final Object RESTART = new Object();

    static final Object NO_SUCH_ELEMENT_SENTINEL = new Object();

    public volatile MainNode mainnode = null;

    public final Gen gen;

    public INodeBase(Gen generation) {
        gen = generation;
    }

    public BasicNode prev() {
	return null;
    }

}