java.util.concurrent.atomic.AtomicReferenceFieldUpdater Maven / Gradle / Ivy

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/*
 * Copyright 2016 Carlos Ballesteros Velasco
 *
 * 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.
 */

package java.util.concurrent.atomic;

public abstract class AtomicReferenceFieldUpdater {
    native public static  AtomicReferenceFieldUpdater newUpdater(Class tclass, Class vclass, String fieldName);

    protected AtomicReferenceFieldUpdater() {
    }

    public abstract boolean compareAndSet(T obj, V expect, V update);

    public abstract boolean weakCompareAndSet(T obj, V expect, V update);

    public abstract void set(T obj, V newValue);

    public abstract void lazySet(T obj, V newValue);

    public abstract V get(T obj);

    public V getAndSet(T obj, V newValue) {
        V prev;
        do {
            prev = get(obj);
        } while (!compareAndSet(obj, prev, newValue));
        return prev;
    }
}