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3939
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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4 *
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5 *
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6 *
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7 *
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8 *
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9 *
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10 *
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11 *
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12 *
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13 *
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14 *
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15 *
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16 *
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17 *
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18 *
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19 *
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20 *
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21 *
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.oops;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.runtime.*;
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31 import sun.jvm.hotspot.types.*;
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32 import sun.jvm.hotspot.utilities.*;
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33
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34 // CounterData
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35 //
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36 // A CounterData corresponds to a simple counter.
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37 public class CounterData extends BitData {
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38
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39 static final int countOff = 0;
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40 static final int counterCellCount = 1;
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41
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42 public CounterData(DataLayout layout) {
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43 super(layout);
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44 }
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45
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46 static int staticCellCount() {
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47 return counterCellCount;
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48 }
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49
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50 public int cellCount() {
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51 return staticCellCount();
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52 }
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53
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54 // Direct accessor
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55 int count() {
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56 return uintAt(countOff);
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57 }
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58
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59 // Code generation support
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60 static int countOffset() {
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61 return cellOffset(countOff);
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62 }
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63 static int counterDataSize() {
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64 return cellOffset(counterCellCount);
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65 }
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66
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67 public void printDataOn(PrintStream st) {
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68 printShared(st, "CounterData");
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69 st.println("count(" + count() + ")");
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70 }
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71 }
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