Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/Layout.java @ 20832:9794217565cd
replaced method substitutions for [Integer|Long].numberOf[Leading|Trailing]Zeros with InvocationPlugins
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 06 Apr 2015 00:08:22 +0200 |
parents | f439fdb137a3 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api.object; |
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26 |
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27 import java.util.*; |
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28 |
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29 import com.oracle.truffle.api.nodes.NodeUtil.FieldOffsetProvider; |
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30 import com.oracle.truffle.api.object.Shape.*; |
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31 |
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32 public abstract class Layout { |
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33 public static final EnumSet<ImplicitCast> NONE = EnumSet.noneOf(ImplicitCast.class); |
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34 public static final EnumSet<ImplicitCast> INT_TO_DOUBLE = EnumSet.of(ImplicitCast.IntToDouble); |
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35 public static final EnumSet<ImplicitCast> INT_TO_LONG = EnumSet.of(ImplicitCast.IntToLong); |
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36 |
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37 public static final String OPTION_PREFIX = "truffle.object."; |
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38 |
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39 private static final LayoutFactory LAYOUT_FACTORY = loadLayoutFactory(); |
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40 |
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41 public enum ImplicitCast { |
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42 IntToDouble, |
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43 IntToLong, |
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44 } |
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45 |
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46 public static Layout createLayout() { |
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47 return createLayout(NONE); |
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48 } |
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49 |
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50 public static Layout createLayout(EnumSet<ImplicitCast> allowedImplicitCasts) { |
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51 return new LayoutBuilder().setAllowedImplicitCasts(allowedImplicitCasts).build(); |
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52 } |
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53 |
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54 public static Layout createLayout(EnumSet<ImplicitCast> allowedImplicitCasts, FieldOffsetProvider fieldOffsetProvider) { |
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55 return new LayoutBuilder().setAllowedImplicitCasts(allowedImplicitCasts).setFieldOffsetProvider(fieldOffsetProvider).build(); |
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56 } |
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57 |
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58 public abstract DynamicObject newInstance(Shape shape); |
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59 |
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60 public abstract Class<? extends DynamicObject> getType(); |
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61 |
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62 public abstract Shape createShape(ObjectType operations); |
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63 |
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64 public abstract Shape createShape(ObjectType operations, Object sharedData); |
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65 |
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66 public abstract Shape createShape(ObjectType operations, Object sharedData, int id); |
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67 |
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68 /** |
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69 * Create an allocator for static property creation. Reserves all array extension slots. |
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70 */ |
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71 public abstract Allocator createAllocator(); |
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72 |
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73 protected static LayoutFactory getFactory() { |
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74 return LAYOUT_FACTORY; |
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75 } |
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76 |
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77 private static LayoutFactory loadLayoutFactory() { |
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78 LayoutFactory bestLayoutFactory = null; |
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79 |
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80 String layoutFactoryImplClassName = System.getProperty(OPTION_PREFIX + "LayoutFactory"); |
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81 if (layoutFactoryImplClassName != null) { |
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82 Class<?> clazz; |
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83 try { |
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84 clazz = Class.forName(layoutFactoryImplClassName); |
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85 } catch (ClassNotFoundException e) { |
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86 throw new RuntimeException(e); |
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87 } |
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88 try { |
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89 bestLayoutFactory = (LayoutFactory) clazz.newInstance(); |
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90 } catch (InstantiationException | IllegalAccessException e) { |
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91 throw new AssertionError(e); |
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92 } |
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93 } else { |
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94 ServiceLoader<LayoutFactory> serviceLoader = ServiceLoader.load(LayoutFactory.class, Layout.class.getClassLoader()); |
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95 for (LayoutFactory currentLayoutFactory : serviceLoader) { |
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96 if (bestLayoutFactory == null) { |
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97 bestLayoutFactory = currentLayoutFactory; |
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98 } else if (currentLayoutFactory.getPriority() >= bestLayoutFactory.getPriority()) { |
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99 assert currentLayoutFactory.getPriority() != bestLayoutFactory.getPriority(); |
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100 bestLayoutFactory = currentLayoutFactory; |
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101 } |
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102 } |
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103 } |
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104 |
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105 if (bestLayoutFactory == null) { |
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106 throw new AssertionError("LayoutFactory not found"); |
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107 } |
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108 return bestLayoutFactory; |
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109 } |
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110 } |