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annotate agent/src/share/classes/sun/jvm/hotspot/memory/AdaptiveFreeList.java @ 14518:d8041d695d19

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Merged with jdk9/dev/hotspot changeset 3812c088b945
author twisti
date Tue, 11 Mar 2014 18:45:59 -0700
parents agent/src/share/classes/sun/jvm/hotspot/memory/FreeList.java@6cf2530f7fd3 agent/src/share/classes/sun/jvm/hotspot/memory/FreeList.java@f6490a5f084a
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1 /*
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2 * @(#)AdaptiveFreeList.java
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3 *
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4 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
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5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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6 *
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7 * This code is free software; you can redistribute it and/or modify it
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8 * under the terms of the GNU General Public License version 2 only, as
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9 * published by the Free Software Foundation.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 *
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25 */
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26
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27 package sun.jvm.hotspot.memory;
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28
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29 import java.util.Observable;
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30 import java.util.Observer;
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31
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32 import sun.jvm.hotspot.debugger.Address;
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33 import sun.jvm.hotspot.runtime.VM;
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34 import sun.jvm.hotspot.runtime.VMObject;
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35 import sun.jvm.hotspot.types.CIntegerField;
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36 import sun.jvm.hotspot.types.Type;
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37 import sun.jvm.hotspot.types.TypeDataBase;
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38
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39 public class AdaptiveFreeList extends VMObject {
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40 static {
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41 VM.registerVMInitializedObserver(new Observer() {
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42 public void update(Observable o, Object data) {
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43 initialize(VM.getVM().getTypeDataBase());
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44 }
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45 });
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46 }
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47
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48 private static synchronized void initialize(TypeDataBase db) {
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49 Type type = db.lookupType("AdaptiveFreeList<FreeChunk>");
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50 sizeField = type.getCIntegerField("_size");
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51 countField = type.getCIntegerField("_count");
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52 headerSize = type.getSize();
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53 }
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54
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55 // Fields
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56 private static CIntegerField sizeField;
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57 private static CIntegerField countField;
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58 private static long headerSize;
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59
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60 //Constructor
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61 public AdaptiveFreeList(Address address) {
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62 super(address);
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63 }
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64
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65 // Accessors
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66 public long size() {
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67 return sizeField.getValue(addr);
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68 }
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69
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70 public long count() {
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71 return countField.getValue(addr);
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72 }
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73
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74 public static long sizeOf() {
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75 return headerSize;
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76 }
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77 }