Mercurial > hg > truffle
annotate truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/access/SLReadPropertyCacheNode.java @ 22157:dc83cc1f94f2
Using fully qualified imports
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Wed, 16 Sep 2015 11:33:22 +0200 |
parents | 503529c65456 |
children | 15c9dda91e50 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2013, 2015, 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 * The Universal Permissive License (UPL), Version 1.0 |
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6 * |
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7 * Subject to the condition set forth below, permission is hereby granted to any |
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8 * person obtaining a copy of this software, associated documentation and/or |
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9 * data (collectively the "Software"), free of charge and under any and all |
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10 * copyright rights in the Software, and any and all patent rights owned or |
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11 * freely licensable by each licensor hereunder covering either (i) the |
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12 * unmodified Software as contributed to or provided by such licensor, or (ii) |
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13 * the Larger Works (as defined below), to deal in both |
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14 * |
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15 * (a) the Software, and |
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16 * |
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17 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if |
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18 * one is included with the Software each a "Larger Work" to which the Software |
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19 * is contributed by such licensors), |
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20 * |
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21 * without restriction, including without limitation the rights to copy, create |
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22 * derivative works of, display, perform, and distribute the Software and make, |
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23 * use, sell, offer for sale, import, export, have made, and have sold the |
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24 * Software and the Larger Work(s), and to sublicense the foregoing rights on |
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25 * either these or other terms. |
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26 * |
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27 * This license is subject to the following condition: |
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28 * |
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29 * The above copyright notice and either this complete permission notice or at a |
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30 * minimum a reference to the UPL must be included in all copies or substantial |
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31 * portions of the Software. |
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32 * |
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33 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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34 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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35 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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36 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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37 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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38 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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39 * SOFTWARE. |
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40 */ |
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41 package com.oracle.truffle.sl.nodes.access; |
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42 |
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43 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary; |
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44 import com.oracle.truffle.api.dsl.Cached; |
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45 import com.oracle.truffle.api.dsl.Specialization; |
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46 import com.oracle.truffle.api.nodes.Node; |
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47 import com.oracle.truffle.api.nodes.UnexpectedResultException; |
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48 import com.oracle.truffle.api.object.DynamicObject; |
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49 import com.oracle.truffle.api.object.LongLocation; |
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50 import com.oracle.truffle.api.object.Property; |
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51 import com.oracle.truffle.api.object.Shape; |
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52 import com.oracle.truffle.sl.runtime.SLNull; |
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53 |
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54 public abstract class SLReadPropertyCacheNode extends Node { |
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55 |
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56 protected static final int CACHE_LIMIT = 3; |
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57 |
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58 protected final String propertyName; |
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59 |
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60 public SLReadPropertyCacheNode(String propertyName) { |
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61 this.propertyName = propertyName; |
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62 } |
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63 |
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64 public static SLReadPropertyCacheNode create(String propertyName) { |
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65 return SLReadPropertyCacheNodeGen.create(propertyName); |
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66 } |
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67 |
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68 public abstract Object executeObject(DynamicObject receiver); |
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69 |
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70 public abstract long executeLong(DynamicObject receiver) throws UnexpectedResultException; |
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71 |
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72 /* |
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73 * We use a separate long specialization to avoid boxing for long. |
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74 */ |
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75 @Specialization(limit = "CACHE_LIMIT", guards = {"longLocation != null", "shape.check(receiver)"}, assumptions = "shape.getValidAssumption()") |
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76 @SuppressWarnings("unused") |
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77 protected long doCachedLong(DynamicObject receiver, // |
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78 @Cached("receiver.getShape()") Shape shape, // |
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79 @Cached("getLongLocation(shape)") LongLocation longLocation) { |
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80 return longLocation.getLong(receiver, true); |
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81 } |
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82 |
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83 protected LongLocation getLongLocation(Shape shape) { |
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84 Property property = shape.getProperty(propertyName); |
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85 if (property != null && property.getLocation() instanceof LongLocation) { |
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86 return (LongLocation) property.getLocation(); |
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87 } |
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88 return null; |
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89 } |
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90 |
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91 /* |
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92 * As soon as we have seen an object read, we cannot avoid boxing long anymore therefore we can |
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93 * contain all long cache entries. |
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94 */ |
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95 @Specialization(limit = "CACHE_LIMIT", contains = "doCachedLong", guards = "shape.check(receiver)", assumptions = "shape.getValidAssumption()") |
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96 protected static Object doCachedObject(DynamicObject receiver, // |
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97 @Cached("receiver.getShape()") Shape shape, // |
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98 @Cached("shape.getProperty(propertyName)") Property property) { |
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99 if (property == null) { |
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100 return SLNull.SINGLETON; |
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101 } else { |
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102 return property.get(receiver, shape); |
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103 } |
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104 } |
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105 |
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106 /* |
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107 * The generic case is used if the number of shapes accessed overflows the limit. |
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108 */ |
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109 @Specialization(contains = "doCachedObject") |
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110 @TruffleBoundary |
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111 protected Object doGeneric(DynamicObject receiver, @Cached("new()") LRUPropertyLookup lruCache) { |
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112 if (!lruCache.shape.check(receiver)) { |
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113 Shape receiverShape = receiver.getShape(); |
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114 lruCache.shape = receiverShape; |
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115 lruCache.property = receiverShape.getProperty(propertyName); |
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116 } |
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117 if (lruCache.property != null) { |
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118 return lruCache.property.get(receiver, true); |
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119 } else { |
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120 return SLNull.SINGLETON; |
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121 } |
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122 } |
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123 |
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124 protected static class LRUPropertyLookup { |
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125 |
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126 private Shape shape; |
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127 private Property property; |
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128 |
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129 public LRUPropertyLookup() { |
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130 } |
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131 |
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132 } |
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133 |
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134 } |