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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/frame/FrameDescriptor.java @ 9258:07f8d136a05e

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Truffle API changes for the Frame API. Introduction of Assumptions class.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 23 Apr 2013 15:34:06 +0200
parents f07cafa29db1
children cd1a1d92b3e3
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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.
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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.api.frame;
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24
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25 import java.util.*;
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26
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27 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.impl.*;
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29
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30 /**
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31 * Descriptor of the slots of frame objects. Multiple frame instances are associated with one such
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32 * descriptor.
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33 */
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34 public final class FrameDescriptor implements Cloneable {
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35
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36 private final FrameTypeConversion typeConversion;
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37 private final ArrayList<FrameSlotImpl> slots;
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38 private final HashMap<Object, FrameSlotImpl> identifierToSlotMap;
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39 private Assumption version;
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41 public FrameDescriptor() {
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42 this(DefaultFrameTypeConversion.getInstance());
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43 }
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44
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45 public FrameDescriptor(FrameTypeConversion typeConversion) {
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46 this.typeConversion = typeConversion;
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47 slots = new ArrayList<>();
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48 identifierToSlotMap = new HashMap<>();
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49 version = createVersion();
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50 }
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51
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52 public FrameSlot addFrameSlot(Object identifier) {
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53 return addFrameSlot(identifier, null);
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54 }
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55
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56 public FrameSlot addFrameSlot(Object identifier, Class<?> type) {
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57 assert !identifierToSlotMap.containsKey(identifier);
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58 FrameSlotImpl slot = new FrameSlotImpl(this, identifier, slots.size(), type);
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59 slots.add(slot);
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60 identifierToSlotMap.put(identifier, slot);
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61 updateVersion();
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62 return slot;
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63 }
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64
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65 public FrameSlot findFrameSlot(Object identifier) {
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66 return identifierToSlotMap.get(identifier);
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67 }
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68
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69 public FrameSlot findOrAddFrameSlot(Object identifier) {
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70 FrameSlot result = findFrameSlot(identifier);
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71 if (result != null) {
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72 return result;
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73 }
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74 return addFrameSlot(identifier);
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75 }
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76
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77 public FrameSlot findOrAddFrameSlot(Object identifier, Class<?> type) {
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78 FrameSlot result = findFrameSlot(identifier);
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79 if (result != null) {
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80 return result;
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81 }
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82 return addFrameSlot(identifier, type);
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83 }
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84
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85 public int getSize() {
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86 return slots.size();
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87 }
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88
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89 public List<? extends FrameSlot> getSlots() {
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90 return Collections.unmodifiableList(slots);
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91 }
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92
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93 /**
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94 * (db) to retrieve the list of all the identifiers associated with this frame descriptor.
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95 *
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96 * @return the list of all the identifiers in this frame descriptor
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97 */
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98 public Set<Object> getIdentifiers() {
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99 return Collections.unmodifiableSet(identifierToSlotMap.keySet());
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100 }
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101
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102 /**
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103 * (db): this method is used for creating a clone of the {@link FrameDescriptor} object ready
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104 * for parallel execution.
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105 */
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106 public FrameDescriptor copy() {
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107 FrameDescriptor clonedFrameDescriptor = new FrameDescriptor(this.typeConversion);
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108 for (int i = 0; i < this.getSlots().size(); i++) {
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109 Object identifier = this.getSlots().get(i).getIdentifier();
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110 clonedFrameDescriptor.addFrameSlot(identifier);
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111 }
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112 return clonedFrameDescriptor;
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113 }
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115 void updateVersion() {
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116 version.invalidate();
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117 version = createVersion();
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118 }
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119
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120 public Assumption getVersion() {
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121 return version;
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122 }
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124 private static Assumption createVersion() {
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125 return Truffle.getRuntime().createAssumption("frame version");
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126 }
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128 public FrameTypeConversion getTypeConversion() {
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129 return typeConversion;
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130 }
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131 }