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Commit 869a25a

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author
hborders
committed
Added com.sun.max.util package from Maxine Base.
This should fix com.sun.max.io.
1 parent 919e488 commit 869a25a
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+1,409Lines changed: 1409 additions & 0 deletions
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‎JavaInJava/src/com/sun/max/util/ArrayValueHistory.java‎

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/*
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* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
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*
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* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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* that is described in this document. In particular, and without limitation, these intellectual property
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* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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* more additional patents or pending patent applications in the U.S. and in other countries.
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*
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* U.S. Government Rights - Commercial software. Government users are subject to the Sun
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* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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* supplements.
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*
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* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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* U.S. and other countries.
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*
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* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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* Company, Ltd.
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*/
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package com.sun.max.util;
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import java.util.*;
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import com.sun.max.program.*;
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/**
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* An array-based recording of the history of a value, with
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* time expressed as the number of generations back from the current generation (0).
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*
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* @author Michael Van De Vanter
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*/
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public class ArrayValueHistory<E> {
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private final ArrayDeque<E> generations;
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private final int limit;
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private int age = -1;
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public ArrayValueHistory(int limit) {
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this.generations = new ArrayDeque<E>();
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this.limit = limit;
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}
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public ArrayValueHistory() {
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this (Integer.MAX_VALUE);
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}
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/**
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* Adds a new value, which becomes the current generation.
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* The generation of all previously recorded values increases by 1.
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*/
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public void add(E newValue) {
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if (generations.size() > 0) {
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if (newValue.equals(generations.getFirst())) {
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if (age >= 0) {
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age++;
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}
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} else {
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age = 0;
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}
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}
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generations.addFirst(newValue);
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if (generations.size() > limit) {
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generations.removeLast();
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}
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}
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/**
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* @return the "current" value (at generation 0).
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* Error if no values have been recorded.
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*/
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public E get() {
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if (generations.size() > 0) {
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return generations.getFirst();
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}
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ProgramError.unexpected("empty history");
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return null;
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}
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/**
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* @return The value at a specified generation.
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* Error if generation does not exist.
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*/
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public E get(int generation) {
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final Iterator<E> iterator = generations.iterator();
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int index = 0;
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while (iterator.hasNext()) {
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if (index == generation) {
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return iterator.next();
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}
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index++;
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}
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ProgramError.unexpected("exceeded history");
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return null;
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}
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/**
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* @return the age, in generations, of the current value, since recording began.
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* 0 if different from immediate predecessor; -1 if no different value ever recorded
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* Comparison uses {@linkplain Object#equals(Object) equals}.
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*/
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public int getAge() {
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return age;
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}
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/**
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* @return the maximum number of generations that can be recorded.
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*/
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public int getLimit() {
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return limit;
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}
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/**
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* @return the number of generations recorded; initially 0.
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*/
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public int getSize() {
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return generations.size();
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}
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/**
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* @return iteration of the values recorded in the history, starting with the current
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* generation and proceeding backward in time.
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*/
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public Iterator<E> values() {
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return generations.iterator();
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}
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}
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‎JavaInJava/src/com/sun/max/util/Deferrable.java‎

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/*
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* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
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*
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* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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* that is described in this document. In particular, and without limitation, these intellectual property
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* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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* more additional patents or pending patent applications in the U.S. and in other countries.
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*
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* U.S. Government Rights - Commercial software. Government users are subject to the Sun
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* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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* supplements.
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*
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* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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* U.S. and other countries.
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*
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* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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* Company, Ltd.
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*/
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package com.sun.max.util;
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import java.util.*;
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/**
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* Deferred Runnables.
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*
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* Creating a Deferrable either causes immediate execution of its 'run()' method
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* or queues it for deferred execution later on when 'runAll()' is called.
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*
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* @author Bernd Mathiske
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*/
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public abstract class Deferrable implements Runnable {
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public Deferrable(Queue queue) {
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queue.handle(this);
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}
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@Override
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public String toString() {
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return super.toString();
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}
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public static final class Queue {
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private List<Deferrable> deferrables;
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private Queue() {
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}
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synchronized void handle(Deferrable deferrable) {
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if (deferrables != null) {
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deferrables.add(deferrable);
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} else {
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deferrable.run();
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}
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}
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public synchronized void deferAll() {
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deferrables = new LinkedList<Deferrable>();
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}
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public synchronized void runAll() {
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while (deferrables != null) {
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final List<Deferrable> oldDeferrables = this.deferrables;
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this.deferrables = new LinkedList<Deferrable>();
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for (Deferrable deferrable : oldDeferrables) {
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deferrable.run();
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}
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if (oldDeferrables.isEmpty()) {
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this.deferrables = null;
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}
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}
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}
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}
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public static Queue createRunning() {
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return new Queue();
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}
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public static Queue createDeferred() {
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final Queue queue = new Queue();
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queue.deferAll();
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return queue;
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}
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public abstract static class Block implements Runnable {
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public Block(Queue queue) {
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queue.deferAll();
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run();
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queue.runAll();
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}
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}
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}
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‎JavaInJava/src/com/sun/max/util/Enumerable.java‎

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+44Lines changed: 44 additions & 0 deletions
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/*
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* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
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*
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* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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* that is described in this document. In particular, and without limitation, these intellectual property
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* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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* more additional patents or pending patent applications in the U.S. and in other countries.
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*
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* U.S. Government Rights - Commercial software. Government users are subject to the Sun
10+
* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
11+
* supplements.
12+
*
13+
* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
14+
* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
15+
* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
16+
* U.S. and other countries.
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*
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* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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* Company, Ltd.
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*/
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package com.sun.max.util;
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/**
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* Java enums are insufficient in that their ordinals have to be successive.
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* An Enumerable has an additional arbitrary int "value",
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* which may incur gaps between ordinal-successive Enumerables.
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* <p>
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* An Enumerator can be called upon to provide the respective Enumerable matching a given value.
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* <p>
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* See <a href="http://www.ejournal.unam.mx/cys/vol07-02/CYS07205.pdf">"Inheritance, Generics and Binary Methods in Java"</a>
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* for an explanation of how to interpret a recursive generic type.
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* <p>
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*
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* @see Enumerator
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*
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* @author Bernd Mathiske
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*/
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public interface Enumerable<E extends Enum<E> & Enumerable<E>> extends Symbol {
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// We are merely declaring this method to lock in the same parameter type for the corresponding enumerator,
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// not for any actual use
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Enumerator<E> enumerator();
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}

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