/*

 * Copyright (c) 2004, 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 sun.jvm.hotspot.runtime;

import java.util.*;

import sun.jvm.hotspot.debugger.*;

import sun.jvm.hotspot.oops.*;

import sun.jvm.hotspot.types.*;

public class PerfDataPrologue extends VMObject {

    private static JIntField  magicField;

    private static JByteField byteOrderField;

    private static JByteField majorVersionField;

    private static JByteField minorVersionField;

    private static JByteField accessibleField;

    private static JIntField  usedField;

    private static JIntField  overflowField;

    private static JLongField modTimeStampField;

    private static JIntField  entryOffsetField;

    private static JIntField  numEntriesField;

    static {

        VM.registerVMInitializedObserver(new Observer() {

                public void update(Observable o, Object data) {

                    initialize(VM.getVM().getTypeDataBase());

                }

            });

    }

    private static synchronized void initialize(TypeDataBase db) {

        Type type = db.lookupType("PerfDataPrologue");

        magicField = type.getJIntField("magic");

        byteOrderField = type.getJByteField("byte_order");

        majorVersionField = type.getJByteField("major_version");

        minorVersionField = type.getJByteField("minor_version");

        accessibleField = type.getJByteField("accessible");

        usedField = type.getJIntField("used");

        overflowField = type.getJIntField("overflow");

        modTimeStampField = type.getJLongField("mod_time_stamp");

        entryOffsetField = type.getJIntField("entry_offset");

        numEntriesField = type.getJIntField("num_entries");

    }

    public PerfDataPrologue(Address addr) {

        super(addr);

    }

    // Accessors

    public int magic() {

        return (int) magicField.getValue(addr);

    }

    public byte byteOrder() {

        return (byte) byteOrderField.getValue(addr);

    }

    public byte majorVersion() {

        return (byte) majorVersionField.getValue(addr);

    }

    public boolean accessible() {

        return ((byte) accessibleField.getValue(addr)) != (byte)0;

    }

    public int used() {

        return (int) usedField.getValue(addr);

    }

    public int overflow() {

        return (int) overflowField.getValue(addr);

    }

    public long modTimeStamp() {

        return (long) modTimeStampField.getValue(addr);

    }

    public int entryOffset() {

        return (int) entryOffsetField.getValue(addr);

    }

    public int numEntries() {

        return (int) numEntriesField.getValue(addr);

    }

}