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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/frame/FrameDescriptor.java @ 11279:494b818b527c

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Adding "Classpath" exception to the classes in the com.oracle.truffle.api and the com.oracle.truffle.api.dsl package.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Fri, 09 Aug 2013 11:55:20 +0200
parents 5d91b0b67cba
children 75d9b7aedcfd
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1 /*
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2 * Copyright (c) 2012, 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.frame;
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27 import java.util.*;
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28
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29 import com.oracle.truffle.api.*;
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30 import com.oracle.truffle.api.impl.*;
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31
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32 /**
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33 * Descriptor of the slots of frame objects. Multiple frame instances are associated with one such
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34 * descriptor.
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35 */
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36 public final class FrameDescriptor implements Cloneable {
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38 private final FrameTypeConversion typeConversion;
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39 private final ArrayList<FrameSlotImpl> slots;
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40 private final HashMap<Object, FrameSlotImpl> identifierToSlotMap;
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41 private Assumption version;
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43 public FrameDescriptor() {
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44 this(DefaultFrameTypeConversion.getInstance());
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45 }
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46
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47 public FrameDescriptor(FrameTypeConversion typeConversion) {
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48 this.typeConversion = typeConversion;
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49 slots = new ArrayList<>();
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50 identifierToSlotMap = new HashMap<>();
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51 version = createVersion();
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52 }
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53
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54 public FrameSlot addFrameSlot(Object identifier) {
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55 return addFrameSlot(identifier, FrameSlotKind.Illegal);
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56 }
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57
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58 public FrameSlot addFrameSlot(Object identifier, FrameSlotKind kind) {
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59 assert !identifierToSlotMap.containsKey(identifier);
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60 FrameSlotImpl slot = new FrameSlotImpl(this, identifier, slots.size(), kind);
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61 slots.add(slot);
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62 identifierToSlotMap.put(identifier, slot);
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63 updateVersion();
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64 return slot;
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65 }
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66
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67 public FrameSlot findFrameSlot(Object identifier) {
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68 return identifierToSlotMap.get(identifier);
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69 }
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71 public FrameSlot findOrAddFrameSlot(Object identifier) {
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72 FrameSlot result = findFrameSlot(identifier);
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73 if (result != null) {
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74 return result;
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75 }
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76 return addFrameSlot(identifier);
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77 }
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79 public FrameSlot findOrAddFrameSlot(Object identifier, FrameSlotKind kind) {
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80 FrameSlot result = findFrameSlot(identifier);
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81 if (result != null) {
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82 return result;
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83 }
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84 return addFrameSlot(identifier, kind);
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85 }
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87 public int getSize() {
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88 return slots.size();
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89 }
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90
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91 public List<? extends FrameSlot> getSlots() {
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92 return Collections.unmodifiableList(slots);
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93 }
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94
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95 /**
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96 * (db) to retrieve the list of all the identifiers associated with this frame descriptor.
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97 *
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98 * @return the list of all the identifiers in this frame descriptor
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99 */
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100 public Set<Object> getIdentifiers() {
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101 return Collections.unmodifiableSet(identifierToSlotMap.keySet());
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102 }
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103
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104 /**
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105 * (db): this method is used for creating a clone of the {@link FrameDescriptor} object ready
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106 * for parallel execution.
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107 */
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108 public FrameDescriptor copy() {
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109 FrameDescriptor clonedFrameDescriptor = new FrameDescriptor(this.typeConversion);
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110 for (int i = 0; i < this.getSlots().size(); i++) {
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111 Object identifier = this.getSlots().get(i).getIdentifier();
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112 clonedFrameDescriptor.addFrameSlot(identifier);
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113 }
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114 return clonedFrameDescriptor;
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115 }
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116
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117 public FrameDescriptor shallowCopy() {
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118 FrameDescriptor clonedFrameDescriptor = new FrameDescriptor(this.typeConversion);
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119 clonedFrameDescriptor.slots.addAll(slots);
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120 clonedFrameDescriptor.identifierToSlotMap.putAll(identifierToSlotMap);
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121 return clonedFrameDescriptor;
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122 }
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123
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124 void updateVersion() {
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125 version.invalidate();
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126 version = createVersion();
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127 }
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128
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129 public Assumption getVersion() {
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130 return version;
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131 }
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132
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133 private static Assumption createVersion() {
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134 return Truffle.getRuntime().createAssumption("frame version");
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135 }
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136
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137 public FrameTypeConversion getTypeConversion() {
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138 return typeConversion;
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139 }
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140 }