/*

 * Copyright (c) 2003, 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

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 */

package sun.jvm.hotspot.gc.cms;

import java.io.*;

import java.util.*;

import sun.jvm.hotspot.debugger.*;

import sun.jvm.hotspot.gc.shared.*;

import sun.jvm.hotspot.runtime.*;

import sun.jvm.hotspot.types.*;

public class ConcurrentMarkSweepGeneration extends CardGeneration {

  private static AddressField cmsSpaceField;

  public ConcurrentMarkSweepGeneration(Address addr) {

    super(addr);

  }

  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("ConcurrentMarkSweepGeneration");

    cmsSpaceField = type.getAddressField("_cmsSpace");

  }

  // Accessing space

  public CompactibleFreeListSpace cmsSpace() {

    return (CompactibleFreeListSpace) VMObjectFactory.newObject(

                                 CompactibleFreeListSpace.class,

                                 cmsSpaceField.getValue(addr));

  }

  public long capacity()                { return cmsSpace().capacity(); }

  public long used()                    { return cmsSpace().used(); }

  public long free()                    { return cmsSpace().free(); }

  public long contiguousAvailable()     { throw new RuntimeException("not yet implemented"); }

  public boolean contains(Address p)    { return cmsSpace().contains(p); }

  public void spaceIterate(SpaceClosure blk, boolean usedOnly) {

     blk.doSpace(cmsSpace());

  }

  public Generation.Name kind() {

    return Generation.Name.CONCURRENT_MARK_SWEEP;

  }

  public String name() {

    return "concurrent mark-sweep generation";

  }

  public void printOn(PrintStream tty) {

    tty.println(name());

    cmsSpace().printOn(tty);

  }

}