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/*
* Copyright 2000-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package sun.jvm.hotspot.memory;
import java.io.*;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;
/** DefNewGeneration is a young generation containing eden, from- and
to-space. */
public class DefNewGeneration extends Generation {
protected static AddressField edenSpaceField;
protected static AddressField fromSpaceField;
protected static AddressField toSpaceField;
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("DefNewGeneration");
edenSpaceField = type.getAddressField("_eden_space");
fromSpaceField = type.getAddressField("_from_space");
toSpaceField = type.getAddressField("_to_space");
}
public DefNewGeneration(Address addr) {
super(addr);
}
public Generation.Name kind() {
return Generation.Name.DEF_NEW;
}
// Accessing spaces
public EdenSpace eden() {
return (EdenSpace) VMObjectFactory.newObject(EdenSpace.class, edenSpaceField.getValue(addr));
}
public ContiguousSpace from() {
return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, fromSpaceField.getValue(addr));
}
public ContiguousSpace to() {
return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, toSpaceField.getValue(addr));
}
public long capacity() { return eden().capacity() + from().capacity(); /* to() is only used during scavenge */ }
public long used() { return eden().used() + from().used(); /* to() is only used during scavenge */ }
public long free() { return eden().free() + from().free(); /* to() is only used during scavenge */ }
public long contiguousAvailable() { return eden().free(); }
public String name() {
return "default new generation";
}
public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
blk.doSpace(eden());
blk.doSpace(from());
if (!usedOnly) {
blk.doSpace(to());
}
}
public void printOn(PrintStream tty) {
tty.print(" eden");
eden().printOn(tty);
tty.print("\n from");
from().printOn(tty);
tty.print("\n to ");
to().printOn(tty);
}
}
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