/*

 * Copyright (c) 2011, 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.  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,

 * 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 java.lang.invoke;

import static java.lang.invoke.MethodHandleNatives.Constants.*;

/**

 * This method handle is used to optionally provide a count of how

 * many times it was invoked.

 *

 * @author never

 */

class CountingMethodHandle extends AdapterMethodHandle {

    private int vmcount;

    private CountingMethodHandle(MethodHandle target) {

        super(target, target.type(), AdapterMethodHandle.makeConv(OP_RETYPE_ONLY));

    }

    /** Wrap the incoming MethodHandle in a CountingMethodHandle if they are enabled */

    static MethodHandle wrap(MethodHandle mh) {

        if (MethodHandleNatives.COUNT_GWT) {

            return new CountingMethodHandle(mh);

        }

        return mh;

    }

}