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author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Thu, 14 Jan 2016 14:20:57 +0100
parents 5309cc9668e3
children
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1 /*
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2 * Copyright (c) 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.
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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.dsl.test.examples;
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24
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25 import static com.oracle.truffle.api.dsl.test.examples.ExampleNode.createArguments;
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26 import static com.oracle.truffle.api.dsl.test.examples.ExampleNode.createTarget;
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27 import static org.junit.Assert.assertEquals;
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29 import org.junit.Test;
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30
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31 import com.oracle.truffle.api.CallTarget;
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32 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
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33 import com.oracle.truffle.api.dsl.Cached;
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34 import com.oracle.truffle.api.dsl.Specialization;
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35 import com.oracle.truffle.api.dsl.test.examples.InteropFactory.UseInteropNodeGen;
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36 import com.oracle.truffle.api.frame.VirtualFrame;
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37 import com.oracle.truffle.api.nodes.Node;
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38
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39 /**
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40 * This example aims to illustrate how the {@link Cached} annotation can be used to implement a
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41 * cache for a simplified language interoperability pattern.
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42 */
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43 public class Interop {
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44
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45 @Test
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46 public void testInterop() {
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47 UseInterop node = UseInteropNodeGen.create(createArguments(2));
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48 CallTarget target = createTarget(node);
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49 TruffleObject o1 = new TruffleObject();
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50 TruffleObject o2 = new TruffleObject();
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51 TruffleObject o3 = new TruffleObject();
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52 TruffleObject o4 = new TruffleObject();
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53 assertEquals(42, target.call(o1, 42));
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54 assertEquals(43, target.call(o2, 43));
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55 assertEquals(44, target.call(o3, 44));
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56 assertEquals(3, node.cached);
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57 assertEquals(0, node.generic);
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58 assertEquals(45, target.call(o4, 45)); // operation gets generic
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59 assertEquals(42, target.call(o1, 42));
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60 assertEquals(43, target.call(o2, 43));
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61 assertEquals(44, target.call(o3, 44));
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62 assertEquals(3, node.cached);
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63 assertEquals(4, node.generic);
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64 }
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65
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66 public static class UseInterop extends ExampleNode {
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67
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68 int cached = 0;
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69 int generic = 0;
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70
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71 @Specialization(guards = "operation.accept(target)")
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72 protected Object interopCached(VirtualFrame frame, TruffleObject target, Object value, //
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73 @Cached("target.createOperation()") TruffleObjectOperation operation) {
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74 cached++;
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75 return operation.execute(frame, target, value);
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76 }
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77
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78 @Specialization(contains = "interopCached")
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79 protected Object interopGeneric(VirtualFrame frame, TruffleObject target, Object value) {
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80 generic++;
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81 return target.createOperation().execute(frame, target, value);
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82 }
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83 }
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84
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85 public abstract static class TruffleObjectOperation extends Node {
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86
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87 public abstract boolean accept(TruffleObject object);
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88
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89 public abstract Object execute(VirtualFrame frame, Object target, Object value);
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90
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91 }
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92
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93 public static class TruffleObject {
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94
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95 @TruffleBoundary
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96 public TruffleObjectOperation createOperation() {
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97 return new TruffleObjectOperation() {
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98 @Override
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99 public Object execute(VirtualFrame frame, Object target, Object value) {
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100 return value;
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101 }
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102
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103 @Override
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104 public boolean accept(TruffleObject object) {
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105 return TruffleObject.this == object;
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106 }
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107 };
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108 }
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109 }
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110
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111 }