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annotate truffle/com.oracle.truffle.object.basic/src/com/oracle/truffle/object/basic/DefaultStrategy.java @ 22157:dc83cc1f94f2
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author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Wed, 16 Sep 2015 11:33:22 +0200 |
parents | af393429ae26 |
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1 /* |
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2 * Copyright (c) 2014, 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. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.truffle.object.basic; |
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24 |
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25 import com.oracle.truffle.api.object.DynamicObject; |
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26 import com.oracle.truffle.api.object.Layout; |
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27 import com.oracle.truffle.api.object.Location; |
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28 import com.oracle.truffle.api.object.Property; |
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29 import com.oracle.truffle.api.object.Shape; |
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30 import com.oracle.truffle.object.LayoutImpl; |
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31 import com.oracle.truffle.object.LayoutStrategy; |
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32 import com.oracle.truffle.object.LocationImpl; |
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33 import com.oracle.truffle.object.ShapeImpl; |
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34 import com.oracle.truffle.object.ShapeImpl.BaseAllocator; |
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35 import java.util.Objects; |
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36 |
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37 class DefaultStrategy implements LayoutStrategy { |
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38 public boolean updateShape(DynamicObject object) { |
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39 assert object.getShape().isValid(); |
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40 return false; |
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41 } |
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42 |
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43 public Shape returnCached(Shape newShape) { |
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44 assert newShape.isValid(); |
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45 return newShape; |
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46 } |
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47 |
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48 private static boolean assertLocationInRange(Shape shape, Location location) { |
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49 BasicLayout layout = (BasicLayout) shape.getLayout(); |
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50 assert (((ShapeImpl) shape).getPrimitiveFieldSize() + ((LocationImpl) location).primitiveFieldCount() <= layout.getPrimitiveFieldCount()); |
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51 assert (((ShapeImpl) shape).getObjectFieldSize() + ((LocationImpl) location).objectFieldCount() <= layout.getObjectFieldCount()); |
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52 return true; |
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53 } |
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54 |
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55 public Shape ensureSpace(Shape shape, Location location) { |
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56 Objects.requireNonNull(location); |
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57 assert assertLocationInRange(shape, location); |
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58 return shape; |
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59 } |
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60 |
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61 public boolean isAutoExtArray() { |
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62 return false; |
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63 } |
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64 |
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65 public Property generalizeProperty(DynamicObject object, Property oldProperty, Object value) { |
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66 Shape oldShape = object.getShape(); |
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67 Location oldLocation = oldProperty.getLocation(); |
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68 Location newLocation = ((BasicAllocator) oldShape.allocator()).locationForValueUpcast(value, oldLocation); |
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69 Property newProperty = oldProperty.relocate(newLocation); |
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70 Shape newShape = oldShape.replaceProperty(oldProperty, newProperty); |
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71 newProperty.setSafe(object, value, oldShape, newShape); |
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72 return newProperty; |
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73 } |
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74 |
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75 public Property generalizeProperty(DynamicObject object, Property oldProperty, Object value, Shape currentShape, Shape oldNewShape) { |
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76 Location oldLocation = oldProperty.getLocation(); |
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77 Location newLocation = ((BasicAllocator) currentShape.allocator()).locationForValueUpcast(value, oldLocation); |
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78 Property newProperty = oldProperty.relocate(newLocation); |
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79 Shape newShape = oldNewShape.replaceProperty(oldProperty, newProperty); |
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80 newProperty.setSafe(object, value, currentShape, newShape); |
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81 return newProperty; |
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82 } |
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83 |
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84 public BaseAllocator createAllocator(Shape shape) { |
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85 return new DefaultAllocatorImpl((ShapeImpl) shape); |
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86 } |
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87 |
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88 public BaseAllocator createAllocator(Layout layout) { |
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89 return new DefaultAllocatorImpl((LayoutImpl) layout); |
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90 } |
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91 |
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92 public static class DefaultAllocatorImpl extends BasicAllocator { |
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93 protected DefaultAllocatorImpl(LayoutImpl layout) { |
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94 super(layout); |
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95 } |
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96 |
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97 protected DefaultAllocatorImpl(ShapeImpl shape) { |
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98 super(shape); |
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99 } |
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100 |
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101 @Override |
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102 public Location locationForValue(Object value, boolean useFinal, boolean nonNull) { |
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103 return super.newDualLocationForValue(value); |
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104 } |
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105 |
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106 @Override |
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107 public Location declaredLocation(Object value) { |
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108 return super.newDeclaredDualLocation(value); |
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109 } |
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110 } |
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111 } |