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/*
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* Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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package sun.jvm.hotspot.memory;
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import java.io.*;
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import java.util.*;
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import sun.jvm.hotspot.debugger.*;
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import sun.jvm.hotspot.runtime.*;
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import sun.jvm.hotspot.types.*;
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public class ConcurrentMarkSweepGeneration extends CardGeneration {
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private static AddressField cmsSpaceField;
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public ConcurrentMarkSweepGeneration(Address addr) {
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super(addr);
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}
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static {
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VM.registerVMInitializedObserver(new Observer() {
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public void update(Observable o, Object data) {
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initialize(VM.getVM().getTypeDataBase());
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}
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});
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}
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private static synchronized void initialize(TypeDataBase db) {
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Type type = db.lookupType("ConcurrentMarkSweepGeneration");
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cmsSpaceField = type.getAddressField("_cmsSpace");
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}
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// Accessing space
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public CompactibleFreeListSpace cmsSpace() {
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return (CompactibleFreeListSpace) VMObjectFactory.newObject(
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CompactibleFreeListSpace.class,
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cmsSpaceField.getValue(addr));
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}
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public long capacity() { return cmsSpace().capacity(); }
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public long used() { return cmsSpace().used(); }
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public long free() { return cmsSpace().free(); }
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public long contiguousAvailable() { throw new RuntimeException("not yet implemented"); }
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public boolean contains(Address p) { return cmsSpace().contains(p); }
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public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
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blk.doSpace(cmsSpace());
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}
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public Generation.Name kind() {
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return Generation.Name.CONCURRENT_MARK_SWEEP;
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}
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public String name() {
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return "concurrent mark-sweep generation";
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}
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public void printOn(PrintStream tty) {
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tty.println(name());
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cmsSpace().printOn(tty);
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}
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}
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