/*

 * Copyright (c) 1996, 2008, 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 sun.awt.windows;

abstract class WObjectPeer {

    static {

        initIDs();

    }

    // The Windows handle for the native widget.

    volatile long pData;

    // if the native peer has been destroyed

    volatile boolean destroyed = false;

    // The associated AWT object.

    Object target;

    private volatile boolean disposed;

    // set from JNI if any errors in creating the peer occur

    protected Error createError = null;

    // used to synchronize the state of this peer

    private final Object stateLock = new Object();

    public static WObjectPeer getPeerForTarget(Object t) {

        WObjectPeer peer = (WObjectPeer) WToolkit.targetToPeer(t);

        return peer;

    }

    public long getData() {

        return pData;

    }

    public Object getTarget() {

        return target;

    }

    public final Object getStateLock() {

        return stateLock;

    }

    /*

     * Subclasses should override disposeImpl() instead of dispose(). Client

     * code should always invoke dispose(), never disposeImpl().

     */

    public final void dispose() {

        boolean call_disposeImpl = false;

        synchronized (this) {

            if (!disposed) {

                disposed = call_disposeImpl = true;

            }

        }

        if (call_disposeImpl) {

            disposeImpl();

        }

    }

    protected final boolean isDisposed() {

        return disposed;

    }

    /**

     * Initialize JNI field and method IDs

     */

    private static native void initIDs();

}