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package org.graalvm.compiler.debug;

A helper class for AbstractKeys that can nest and need to split out accumulated and flat values for some kind of counter-like measurement.
/** * A helper class for {@link AbstractKey}s that can nest and need to split out accumulated and flat * values for some kind of counter-like measurement. */
public abstract class CloseableCounter implements DebugCloseable { protected final DebugContext debug; protected final CloseableCounter parent; protected final AccumulatedKey counter; protected final long start; protected long nestedAmountToSubtract; CloseableCounter(DebugContext debug, CloseableCounter parent, AccumulatedKey counter) { this.debug = debug; this.parent = parent; this.start = getCounterValue(); this.counter = counter; } @Override public DebugContext getDebug() { return debug; }
A hook for subclasses. Lets them perform custom operations with the value since the last invocation of close() of this accumulated counter.
Params:
  • difference – since the last invocation of this counter flat
/** * A hook for subclasses. Lets them perform custom operations with the value since the last * invocation of {@link CloseableCounter#close()} of this accumulated * {@link CloseableCounter#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 close() of this flat counter.
Params:
  • difference – since the last invocation of this counter flat
/** * A hook for subclasses. Lets them perform custom operations with the value since the last * invocation of {@link CloseableCounter#close()} of this flat {@link CloseableCounter#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 CloseableCounter 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(debug, difference); counter.flat.addToCurrentValue(debug, flatAmount); interceptDifferenceAccm(difference); interceptDifferenceFlat(flatAmount); } abstract long getCounterValue(); }