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