/*

 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package org.graalvm.api.word;

/**

 * A {@link Unsigned} value that may be updated atomically. See the

 * {@link java.util.concurrent.atomic} package specification for description of the properties of

 * atomic variables.

 */

public class AtomicUnsigned extends AtomicWord<Unsigned> {

    /**

     * Atomically adds the given value to the current value.

     *

     * @param delta the value to add

     * @return the previous value

     */

    public final Unsigned getAndAdd(Unsigned delta) {

        return WordFactory.unsigned(value.getAndAdd(delta.rawValue()));

    }

    /**

     * Atomically adds the given value to the current value.

     *

     * @param delta the value to add

     * @return the updated value

     */

    public final Unsigned addAndGet(Unsigned delta) {

        return WordFactory.unsigned(value.addAndGet(delta.rawValue()));

    }

    /**

     * Atomically subtracts the given value from the current value.

     *

     * @param delta the value to add

     * @return the previous value

     */

    public final Unsigned getAndSubtract(Unsigned delta) {

        return WordFactory.unsigned(value.getAndAdd(-delta.rawValue()));

    }

    /**

     * Atomically subtracts the given value from the current value.

     *

     * @param delta the value to add

     * @return the updated value

     */

    public final Unsigned subtractAndGet(Unsigned delta) {

        return WordFactory.unsigned(value.addAndGet(-delta.rawValue()));

    }

}