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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/NodeFieldAccessor.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 4858c5e074e9
children cd7ee4a382e4
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1 /*
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2 * Copyright (c) 2012, 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 * 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.nodes;
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26
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27 import com.oracle.truffle.api.nodes.Node.Child;
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28 import com.oracle.truffle.api.nodes.Node.Children;
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29 import com.oracle.truffle.api.nodes.NodeUtil.FieldOffsetProvider;
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30 import java.lang.reflect.Field;
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31 import sun.misc.Unsafe;
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32
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33 /**
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34 * Information about a field in a {@link Node} class.
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35 */
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36 public abstract class NodeFieldAccessor {
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37
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38 public static enum NodeFieldKind {
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39 /** The reference to the {@link NodeClass}. */
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40 NODE_CLASS,
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41 /** The single {@link Node#getParent() parent} field. */
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42 PARENT,
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43 /** A field annotated with {@link Child}. */
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44 CHILD,
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45 /** A field annotated with {@link Children}. */
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46 CHILDREN,
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47 /** A normal non-child data field of the node. */
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48 DATA
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49 }
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50
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51 private static final boolean USE_UNSAFE = Boolean.getBoolean("truffle.unsafe");
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52
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53 private final NodeFieldKind kind;
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54 private final Class<?> declaringClass;
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55 private final String name;
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56 protected final Class<?> type;
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57
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58 protected NodeFieldAccessor(NodeFieldKind kind, Class<?> declaringClass, String name, Class<?> type) {
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59 this.kind = kind;
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60 this.declaringClass = declaringClass;
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61 this.name = name;
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62 this.type = type;
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63 }
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64
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65 protected static NodeFieldAccessor create(NodeFieldKind kind, Field field) {
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66 if (USE_UNSAFE) {
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67 return new UnsafeNodeField(kind, field);
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68 } else {
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69 return new ReflectionNodeField(kind, field);
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70 }
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71 }
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72
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73 public NodeFieldKind getKind() {
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74 return kind;
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75 }
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76
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77 public Class<?> getType() {
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78 return type;
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79 }
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80
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81 public Class<?> getDeclaringClass() {
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82 return declaringClass;
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83 }
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84
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85 public String getName() {
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86 return name;
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87 }
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88
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89 public abstract void putObject(Node receiver, Object value);
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90
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91 public abstract Object getObject(Node receiver);
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92
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93 public abstract Object loadValue(Node node);
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94
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95 private static final Unsafe unsafe = getUnsafe();
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96
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97 private static Unsafe getUnsafe() {
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98 try {
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99 return Unsafe.getUnsafe();
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100 } catch (SecurityException e) {
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101 }
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102 try {
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103 Field theUnsafeInstance = Unsafe.class.getDeclaredField("theUnsafe");
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104 theUnsafeInstance.setAccessible(true);
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105 return (Unsafe) theUnsafeInstance.get(Unsafe.class);
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106 } catch (Exception e) {
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107 throw new RuntimeException("exception while trying to get Unsafe.theUnsafe via reflection:", e);
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108 }
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109 }
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110
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111 private static final FieldOffsetProvider unsafeFieldOffsetProvider = new FieldOffsetProvider() {
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112
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113 @Override
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114 public long objectFieldOffset(Field field) {
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115 return unsafe.objectFieldOffset(field);
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116 }
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117
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118 @Override
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119 public int getTypeSize(Class<?> clazz) {
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120 if (!clazz.isPrimitive()) {
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121 return Unsafe.ARRAY_OBJECT_INDEX_SCALE;
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122 } else if (clazz == int.class) {
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123 return Unsafe.ARRAY_INT_INDEX_SCALE;
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124 } else {
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125 throw new UnsupportedOperationException("unsupported field type: " + clazz);
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126 }
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127 }
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128 };
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129
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130 public abstract static class AbstractUnsafeNodeFieldAccessor extends NodeFieldAccessor {
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131
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132 protected AbstractUnsafeNodeFieldAccessor(NodeFieldKind kind, Class<?> declaringClass, String name, Class<?> type) {
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133 super(kind, declaringClass, name, type);
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134 }
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135
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136 public abstract long getOffset();
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137
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138 @Override
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139 public void putObject(Node receiver, Object value) {
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140 if (!type.isPrimitive() && value == null || type.isInstance(value)) {
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141 unsafe.putObject(receiver, getOffset(), value);
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142 } else {
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143 throw new IllegalArgumentException();
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144 }
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145 }
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146
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147 @Override
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148 public Object getObject(Node receiver) {
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149 if (!type.isPrimitive()) {
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150 return unsafe.getObject(receiver, getOffset());
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151 } else {
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152 throw new IllegalArgumentException();
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153 }
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154 }
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155
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156 @Override
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157 public Object loadValue(Node node) {
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158 if (type == boolean.class) {
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159 return unsafe.getBoolean(node, getOffset());
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160 } else if (type == byte.class) {
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161 return unsafe.getByte(node, getOffset());
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162 } else if (type == short.class) {
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163 return unsafe.getShort(node, getOffset());
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164 } else if (type == char.class) {
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165 return unsafe.getChar(node, getOffset());
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166 } else if (type == int.class) {
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167 return unsafe.getInt(node, getOffset());
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168 } else if (type == long.class) {
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169 return unsafe.getLong(node, getOffset());
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170 } else if (type == float.class) {
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171 return unsafe.getFloat(node, getOffset());
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172 } else if (type == double.class) {
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173 return unsafe.getDouble(node, getOffset());
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174 } else {
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175 return unsafe.getObject(node, getOffset());
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176 }
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177 }
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178 }
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179
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180 private static final class UnsafeNodeField extends AbstractUnsafeNodeFieldAccessor {
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181 private final long offset;
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182
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183 protected UnsafeNodeField(NodeFieldKind kind, Field field) {
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184 super(kind, field.getDeclaringClass(), field.getName(), field.getType());
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diff changeset
185 this.offset = unsafeFieldOffsetProvider.objectFieldOffset(field);
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186 }
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187
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188 @Override
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189 public long getOffset() {
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190 return offset;
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191 }
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192 }
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diff changeset
193
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194 private static final class ReflectionNodeField extends NodeFieldAccessor {
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195 private final Field field;
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196
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diff changeset
197 protected ReflectionNodeField(NodeFieldKind kind, Field field) {
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diff changeset
198 super(kind, field.getDeclaringClass(), field.getName(), field.getType());
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199 this.field = field;
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200 field.setAccessible(true);
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
201 }
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parents:
diff changeset
202
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parents:
diff changeset
203 @Override
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diff changeset
204 public void putObject(Node receiver, Object value) {
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parents:
diff changeset
205 assert !type.isPrimitive() && value == null || type.isInstance(value);
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parents:
diff changeset
206 try {
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diff changeset
207 field.set(receiver, value);
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parents:
diff changeset
208 } catch (IllegalAccessException e) {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
209 throw new AssertionError(e);
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parents:
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210 }
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
211 }
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
212
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
213 @Override
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
214 public Object getObject(Node receiver) {
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parents:
diff changeset
215 assert !type.isPrimitive();
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
216 try {
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parents:
diff changeset
217 return field.get(receiver);
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
218 } catch (IllegalAccessException e) {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
219 throw new AssertionError(e);
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Christian Humer <christian.humer@gmail.com>
parents:
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220 }
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Christian Humer <christian.humer@gmail.com>
parents:
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221 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
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parents:
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222
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
223 @Override
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
224 public Object loadValue(Node node) {
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parents:
diff changeset
225 try {
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diff changeset
226 if (type == boolean.class) {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
227 return field.getBoolean(node);
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parents:
diff changeset
228 } else if (type == byte.class) {
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diff changeset
229 return field.getByte(node);
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parents:
diff changeset
230 } else if (type == short.class) {
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parents:
diff changeset
231 return field.getShort(node);
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parents:
diff changeset
232 } else if (type == char.class) {
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diff changeset
233 return field.getChar(node);
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
234 } else if (type == int.class) {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
235 return field.getInt(node);
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
236 } else if (type == long.class) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
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diff changeset
237 return field.getLong(node);
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
238 } else if (type == float.class) {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
239 return field.getFloat(node);
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
240 } else if (type == double.class) {
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
241 return field.getDouble(node);
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
242 } else {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
243 return field.get(node);
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
244 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
245 } catch (IllegalAccessException e) {
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
246 throw new AssertionError(e);
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
247 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
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248 }
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
249 }
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
250
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
251 }