org.jgroups.util.PaddedAtomicLong Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

There is a newer version: 34.0.0.Final

Show newest version

package org.jgroups.util;

import java.util.concurrent.atomic.AtomicLong;

/**
 * Copied from http://mechanical-sympathy.blogspot.ch/2011/08/false-sharing-java-7.html. Switch to @Contended once
 * it is available.
 * @author Bela Ban
 * @since  4.0
 */
@SuppressWarnings("serial")
public class PaddedAtomicLong extends AtomicLong {
    public volatile long p1=1,p2=2,p3=3,p4=4,p5=5,p6=6,p7=7;

    public long sum() { // prevents optimizing away the fields above
        return p1+p2+p3+p4+p5+p6+p7;
    }

    public PaddedAtomicLong(long initialValue) {
        super(initialValue);
    }
}