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annotate graal/com.oracle.truffle.api.interop/src/com/oracle/truffle/api/interop/ObjectAccessNode.java @ 21770:c76742cc2c6f

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Polishing inter-operability APIs: Exposing only Message, TruffleObject and ForeignAccess-related classes.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Mon, 08 Jun 2015 04:50:13 +0200
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c76742cc2c6f Polishing inter-operability APIs: Exposing only Message, TruffleObject and ForeignAccess-related classes.
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1 /*
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2 * Copyright (c) 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. 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.interop;
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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.frame.*;
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29 import com.oracle.truffle.api.nodes.*;
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30
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31 abstract class ObjectAccessNode extends Node {
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32
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33 public abstract Object executeWith(VirtualFrame frame, TruffleObject receiver, Object[] arguments);
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34
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35 }
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36
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37 class UnresolvedObjectAccessNode extends ObjectAccessNode {
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38
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39 private static final int CACHE_SIZE = 8;
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40 private int cacheLength = 1;
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41
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42 @Override
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43 public Object executeWith(VirtualFrame frame, TruffleObject receiver, Object[] arguments) {
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44 CompilerDirectives.transferToInterpreterAndInvalidate();
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45 ForeignObjectAccessHeadNode nthParent = (ForeignObjectAccessHeadNode) NodeUtil.getNthParent(this, cacheLength);
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46 ObjectAccessNode first = nthParent.getFirst();
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47 if (cacheLength < CACHE_SIZE) {
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48 cacheLength++;
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49 CachedObjectAccessNode createCachedAccess = createCachedAccess(receiver, nthParent.getAccessTree(), first);
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50 return first.replace(createCachedAccess).executeWith(frame, receiver, arguments);
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51 } else {
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52 return first.replace(createGenericAccess(nthParent.getAccessTree())).executeWith(frame, receiver, arguments);
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53 }
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54 }
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55
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56 private static CachedObjectAccessNode createCachedAccess(TruffleObject receiver, Message accessTree, ObjectAccessNode next) {
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57 ForeignAccess fa = receiver.getForeignAccess();
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58 final CallTarget ct = fa.access(accessTree);
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59 if (ct == null) {
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60 throw new IllegalArgumentException("Message " + accessTree + " not recognized by " + fa);
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61 }
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62 return new CachedObjectAccessNode(Truffle.getRuntime().createDirectCallNode(ct), next, fa);
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63 }
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64
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65 private static GenericObjectAccessNode createGenericAccess(Message access) {
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66 return new GenericObjectAccessNode(access);
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67 }
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68 }
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70 class GenericObjectAccessNode extends ObjectAccessNode {
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71
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72 private final Message access;
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73 @Child private IndirectCallNode indirectCallNode;
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74
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75 public GenericObjectAccessNode(Message access) {
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76 this.access = access;
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77 indirectCallNode = Truffle.getRuntime().createIndirectCallNode();
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78 }
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79
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80 public GenericObjectAccessNode(GenericObjectAccessNode prev) {
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81 this(prev.access);
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82 }
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83
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84 @Override
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85 public Object executeWith(VirtualFrame frame, TruffleObject truffleObject, Object[] arguments) {
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86 final ForeignAccess fa = truffleObject.getForeignAccess();
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87 final CallTarget ct = fa.access(access);
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88 if (ct == null) {
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89 throw new IllegalStateException("Message " + access + " not recognized by " + fa);
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90 }
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91 return indirectCallNode.call(frame, ct, ForeignAccessArguments.create(truffleObject, arguments));
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92 }
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93 }
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94
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95 class CachedObjectAccessNode extends ObjectAccessNode {
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96 @Child private DirectCallNode callTarget;
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97 @Child private ObjectAccessNode next;
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98
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99 private final ForeignAccess languageCheck;
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100
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101 protected CachedObjectAccessNode(DirectCallNode callTarget, ObjectAccessNode next, ForeignAccess languageCheck) {
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102 this.callTarget = callTarget;
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103 this.next = next;
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104 this.languageCheck = languageCheck;
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105 this.callTarget.forceInlining();
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106 }
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107
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108 protected CachedObjectAccessNode(CachedObjectAccessNode prev) {
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109 this(prev.callTarget, prev.next, prev.languageCheck);
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110 }
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111
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112 @Override
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113 public Object executeWith(VirtualFrame frame, TruffleObject receiver, Object[] arguments) {
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114 return doAccess(frame, receiver, arguments);
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115 }
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116
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117 private Object doAccess(VirtualFrame frame, TruffleObject receiver, Object[] arguments) {
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118 if (languageCheck.canHandle(receiver)) {
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119 return callTarget.call(frame, ForeignAccessArguments.create(receiver, arguments));
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120 } else {
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121 return doNext(frame, receiver, arguments);
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122 }
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123 }
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124
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125 private Object doNext(VirtualFrame frame, TruffleObject receiver, Object[] arguments) {
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126 return next.executeWith(frame, receiver, arguments);
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127 }
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128 }