Mercurial > hg > graal-compiler
view graal/com.oracle.graal.compiler.common/src/com/oracle/graal/compiler/common/CollectionsFactory.java @ 18678:e04d70a4d3ae
prefer profile methods during partial evaluation
author | Lukas Stadler <lukas.stadler@oracle.com> |
---|---|
date | Mon, 15 Dec 2014 14:54:59 +0100 |
parents | 86269e451920 |
children | 5df121664e08 |
line wrap: on
line source
/* * Copyright (c) 2014, 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 com.oracle.graal.compiler.common; import static com.oracle.graal.compiler.common.CollectionsFactory.Mode.*; import java.util.*; /** * Factory for creating collection objects used during compilation. */ public class CollectionsFactory { private static final ThreadLocal<Mode> tl = new ThreadLocal<>(); public static class ModeScope implements AutoCloseable { private final Mode previousMode; public ModeScope(Mode previousMode) { this.previousMode = previousMode; } public void close() { tl.set(previousMode); } } /** * Constants denoting what type of collections are {@link CollectionsFactory#getMode() * currently} returned by the factory. */ public enum Mode { /** * Denotes standard collections such as {@link HashSet} and {@link HashMap}. */ STANDARD, /** * Denotes collections that have a deterministic iteration order over their keys/entries. */ DETERMINISTIC_ITERATION_ORDER; } /** * Gets the current mode determining the type of collection objects created by this factory. */ public static Mode getMode() { Mode mode = tl.get(); return mode == null ? Mode.STANDARD : mode; } /** * Updates the mode for the current thread. * * @return an object which when {@linkplain ModeScope#close() closed} will revert the mode of * the current thread to the stae before calling this method */ public static ModeScope changeMode(Mode mode) { Mode previousMode = tl.get(); tl.set(mode); return new ModeScope(previousMode); } public static <K, V> HashMap<K, V> newMap() { return getMode() == STANDARD ? new HashMap<>() : new LinkedHashMap<>(); } public static <K, V> HashMap<K, V> newMap(Map<K, V> m) { return getMode() == STANDARD ? new HashMap<>(m) : new LinkedHashMap<>(m); } public static <K, V> HashMap<K, V> newMap(int initialCapacity) { return getMode() == STANDARD ? new HashMap<>(initialCapacity) : new LinkedHashMap<>(initialCapacity); } public static <K, V> Map<K, V> newIdentityMap() { return getMode() == STANDARD ? new IdentityHashMap<>() : new LinkedIdentityHashMap<>(); } public static <K, V> Map<K, V> newIdentityMap(int expectedMaxSize) { return getMode() == STANDARD ? new IdentityHashMap<>(expectedMaxSize) : new LinkedIdentityHashMap<>(); } public static <K, V> Map<K, V> newIdentityMap(Map<K, V> m) { return getMode() == STANDARD ? new IdentityHashMap<>(m) : new LinkedIdentityHashMap<>(m); } }