src/library/scala/collection/concurrent/CNodeBase.java


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/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala.collection.concurrent;

import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;

abstract class CNodeBase<K, V> extends MainNode<K, V> {

    @SuppressWarnings("rawtypes")
    public static final AtomicIntegerFieldUpdater<CNodeBase> updater =
            AtomicIntegerFieldUpdater.newUpdater(CNodeBase.class, "csize");

    public volatile int csize = -1;

    public boolean CAS_SIZE(int oldval, int nval) {
	return updater.compareAndSet(this, oldval, nval);
    }

    public void WRITE_SIZE(int nval) {
	updater.set(this, nval);
    }

    public int READ_SIZE() {
	return updater.get(this);
    }

}