ParallelScavengeHeap.java

/*
 * 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
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package sun.jvm.hotspot.gc.parallel;

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 ParallelScavengeHeap extends CollectedHeap {
   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("ParallelScavengeHeap");
      youngGenField = type.getAddressField("_young_gen");
      oldGenField    = type.getAddressField("_old_gen");
   }

   public ParallelScavengeHeap(Address addr) {
      super(addr);
   }

   // Fields
   private static AddressField youngGenField;
   private static AddressField oldGenField;

   // Accessors
   public PSYoungGen youngGen() {
      return (PSYoungGen) VMObjectFactory.newObject(PSYoungGen.class, youngGenField.getValue());
   }

   public PSOldGen oldGen() {
      return (PSOldGen) VMObjectFactory.newObject(PSOldGen.class, oldGenField.getValue());
   }

   public long capacity() {
      return youngGen().capacity() + oldGen().capacity();
   }

   public long used() {
      return youngGen().used() + oldGen().used();
   }

   public boolean isIn(Address a) {
      if (youngGen().isIn(a)) {
         return true;
      }

      if (oldGen().isIn(a)) {
         return true;
      }

      return false;
   }

   public CollectedHeapName kind() {
      return CollectedHeapName.PARALLEL_SCAVENGE_HEAP;
   }

   public void printOn(PrintStream tty) {
      tty.print("ParallelScavengeHeap [ ");
      youngGen().printOn(tty);
      oldGen().printOn(tty);
      tty.print(" ] ");
   }
}