author | stefank |
Tue, 19 Feb 2019 10:03:41 +0100 | |
changeset 53814 | eff915f3d3f2 |
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/* |
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* @(#)AdaptiveFreeList.java |
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* |
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* Copyright (c) 2000, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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package sun.jvm.hotspot.gc.cms; |
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import java.util.Observable; |
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import java.util.Observer; |
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import sun.jvm.hotspot.debugger.Address; |
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import sun.jvm.hotspot.runtime.VM; |
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import sun.jvm.hotspot.runtime.VMObject; |
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import sun.jvm.hotspot.types.CIntegerField; |
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import sun.jvm.hotspot.types.Type; |
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import sun.jvm.hotspot.types.TypeDataBase; |
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public class AdaptiveFreeList extends VMObject { |
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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("AdaptiveFreeList<FreeChunk>"); |
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sizeField = type.getCIntegerField("_size"); |
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countField = type.getCIntegerField("_count"); |
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headerSize = type.getSize(); |
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} |
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// Fields |
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private static CIntegerField sizeField; |
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private static CIntegerField countField; |
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private static long headerSize; |
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//Constructor |
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public AdaptiveFreeList(Address address) { |
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super(address); |
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} |
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// Accessors |
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public long size() { |
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return sizeField.getValue(addr); |
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} |
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public long count() { |
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return countField.getValue(addr); |
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} |
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public static long sizeOf() { |
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return headerSize; |
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} |
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} |