1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.debug; 24 25 /** 26 * A helper class for {@link AbstractKey}s that can nest and need to split out accumulated and flat 27 * values for some kind of counter-like measurement. 28 */ 29 public abstract class CloseableCounter implements DebugCloseable { 30 31 protected final DebugContext debug; 32 protected final CloseableCounter parent; 33 protected final AccumulatedKey counter; 34 protected final long start; 35 protected long nestedAmountToSubtract; 36 37 CloseableCounter(DebugContext debug, CloseableCounter parent, AccumulatedKey counter) { 38 this.debug = debug; 39 this.parent = parent; 40 this.start = getCounterValue(); 41 this.counter = counter; 42 } 43 44 @Override 45 public DebugContext getDebug() { 46 return debug; 47 } 48 49 /** 50 * A hook for subclasses. Lets them perform custom operations with the value since the last 51 * invocation of {@link CloseableCounter#close()} of this accumulated 52 * {@link CloseableCounter#counter}. 53 * 54 * @param difference since the last invocation of this counter flat 55 */ 56 protected void interceptDifferenceAccm(long difference) { 57 // hook for subclasses 58 } 59 60 /** 61 * A hook for subclasses. Lets them perform custom operations with the value since the last 62 * invocation of {@link CloseableCounter#close()} of this flat {@link CloseableCounter#counter}. 63 * 64 * @param difference since the last invocation of this counter flat 65 */ 66 protected void interceptDifferenceFlat(long difference) { 67 // hook for subclasses 68 } 69 70 @Override 71 public void close() { 72 long end = getCounterValue(); 73 long difference = end - start; 74 if (parent != null) { 75 if (!counter.getName().equals(parent.counter.getName())) { 76 parent.nestedAmountToSubtract += difference; 77 // Look for our counter in an outer scope and fix up 78 // the adjustment to the flat count 79 CloseableCounter ancestor = parent.parent; 80 while (ancestor != null) { 81 if (ancestor.counter.getName().equals(counter.getName())) { 82 ancestor.nestedAmountToSubtract -= difference; 83 break; 84 } 85 ancestor = ancestor.parent; 86 } 87 } 88 } 89 long flatAmount = difference - nestedAmountToSubtract; 90 counter.addToCurrentValue(debug, difference); 91 counter.flat.addToCurrentValue(debug, flatAmount); 92 interceptDifferenceAccm(difference); 93 interceptDifferenceFlat(flatAmount); 94 } 95 96 abstract long getCounterValue(); 97 }