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 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.

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

 *

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

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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,

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 *

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package java.dyn;

import java.util.List;

/**

 * A {@code VolatileCallSite} is a {@link CallSite} whose target acts like a volatile variable.

 * An {@code invokedynamic} instruction linked to a {@code VolatileCallSite} sees updates

 * to its call site target immediately, even if the update occurs in another thread.

 * <p>

 * @author John Rose, JSR 292 EG

 */

public class VolatileCallSite extends CallSite {

    /** Create a call site with a volatile target.

     *  of the given type which will throw {@code IllegalStateException}.

     */

    public VolatileCallSite(MethodType type) {

        super(type);

    }

    /** Create a call site with a volatile target.

     */

    public VolatileCallSite(MethodHandle target) {

        super(target);

    }

    /** Internal override to nominally final getTarget. */

    @Override

    MethodHandle getTarget0() {

        return getTargetVolatile();

    }

    /**

     * Set the target method of this call site, as a volatile variable.

     * effects associated with volatiles, in the Java Memory Model.

     */

    @Override public void setTarget(MethodHandle newTarget) {

        checkTargetChange(getTargetVolatile(), newTarget);

        setTargetVolatile(newTarget);

    }

}