com.conversantmedia.util.concurrent.ContendedAtomicInteger Maven / Gradle / Ivy
package com.conversantmedia.util.concurrent;
/*
* #%L
* Conversant Disruptor
* ~~
* Conversantmedia.com © 2016, Conversant, Inc. Conversant® is a trademark of Conversant, Inc.
* ~~
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import java.util.concurrent.atomic.AtomicIntegerArray;
/**
* Avoid false cache line sharing
*
* Created by jcairns on 5/28/14.
*/
final class ContendedAtomicInteger {
private static final int CACHE_LINE_INTS = ContendedAtomicLong.CACHE_LINE/Integer.BYTES;
private final AtomicIntegerArray contendedArray;
public ContendedAtomicInteger(final int init) {
contendedArray = new AtomicIntegerArray(2*CACHE_LINE_INTS);
set(init);
}
public int get() {
return contendedArray.get(CACHE_LINE_INTS);
}
public void set(final int i) {
contendedArray.set(CACHE_LINE_INTS, i);
}
public boolean compareAndSet(final int expect, final int i) {
return contendedArray.compareAndSet(CACHE_LINE_INTS, expect, i);
}
public String toString() {
return Integer.toString(get());
}
}