| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.debug.internal; |
| |
| import org.graalvm.compiler.debug.DebugCloseable; |
| |
| /** |
| * A helper class for DebugValues that can nest and need to split out accumulated and flat values |
| * for some kind of counter-like measurement. |
| */ |
| abstract class CloseableCounterImpl implements DebugCloseable { |
| |
| protected final CloseableCounterImpl parent; |
| protected final AccumulatedDebugValue counter; |
| protected final long start; |
| protected long nestedAmountToSubtract; |
| |
| CloseableCounterImpl(CloseableCounterImpl parent, AccumulatedDebugValue counter) { |
| this.parent = parent; |
| this.start = getCounterValue(); |
| this.counter = counter; |
| } |
| |
| /** |
| * A hook for subclasses. Lets them perform custom operations with the value since the last |
| * invocation of {@link CloseableCounterImpl#close()} of this accumulated |
| * {@link CloseableCounterImpl#counter}. |
| * |
| * @param difference since the last invocation of this counter flat |
| */ |
| protected void interceptDifferenceAccm(long difference) { |
| // hook for subclasses |
| } |
| |
| /** |
| * A hook for subclasses. Lets them perform custom operations with the value since the last |
| * invocation of {@link CloseableCounterImpl#close()} of this flat |
| * {@link CloseableCounterImpl#counter}. |
| * |
| * @param difference since the last invocation of this counter flat |
| */ |
| protected void interceptDifferenceFlat(long difference) { |
| // hook for subclasses |
| } |
| |
| @Override |
| public void close() { |
| long end = getCounterValue(); |
| long difference = end - start; |
| if (parent != null) { |
| if (!counter.getName().equals(parent.counter.getName())) { |
| parent.nestedAmountToSubtract += difference; |
| // Look for our counter in an outer scope and fix up |
| // the adjustment to the flat count |
| CloseableCounterImpl ancestor = parent.parent; |
| while (ancestor != null) { |
| if (ancestor.counter.getName().equals(counter.getName())) { |
| ancestor.nestedAmountToSubtract -= difference; |
| break; |
| } |
| ancestor = ancestor.parent; |
| } |
| } |
| } |
| long flatAmount = difference - nestedAmountToSubtract; |
| counter.addToCurrentValue(difference); |
| counter.flat.addToCurrentValue(flatAmount); |
| interceptDifferenceAccm(difference); |
| interceptDifferenceFlat(flatAmount); |
| } |
| |
| abstract long getCounterValue(); |
| } |