/*
* Copyright (c) 2003, 2012, 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.utilities;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.types.*;
import sun.jvm.hotspot.runtime.*;
// Superclass for symbol and string tables.
public class BasicHashtable extends VMObject {
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("BasicHashtable<mtInternal>");
tableSizeField = type.getCIntegerField("_table_size");
bucketsField = type.getAddressField("_buckets");
bucketSize = db.lookupType("HashtableBucket<mtInternal>").getSize();
}
// Fields
private static CIntegerField tableSizeField;
private static AddressField bucketsField;
private static long bucketSize;
// Accessors
protected int tableSize() {
return (int) tableSizeField.getValue(addr);
}
protected BasicHashtableEntry bucket(int i) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(i >= 0 && i < tableSize(), "Invalid bucket id");
}
Address tmp = bucketsField.getValue(addr);
tmp = tmp.addOffsetTo(i * bucketSize);
HashtableBucket bucket = (HashtableBucket) VMObjectFactory.newObject(
HashtableBucket.class, tmp);
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