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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 18 Dec 2012 15:33:55 +0100
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children 5e3d1a68664e
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a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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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
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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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.test;
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24
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25 import org.junit.*;
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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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31
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32 /**
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33 * <h3>Calling Another Tree</h3>
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34 *
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35 * <p>
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36 * A guest language implementation can create multiple call targets using the {@link TruffleRuntime#createCallTarget(RootNode)} method.
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37 * Those call targets can be passed around as normal Java objects and used for calling guest language methods.
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38 * </p>
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39 *
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40 * <p>
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41 * The next part of the Truffle API introduction is at {@link com.oracle.truffle.api.test.ArgumentsTest}.
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42 * </p>
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43 */
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44 public class CallTest {
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45
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46 @Test
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47 public void test() {
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48 TruffleRuntime runtime = Truffle.getRuntime();
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49 CallTarget foo = runtime.createCallTarget(new ConstantRootNode(20));
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50 CallTarget bar = runtime.createCallTarget(new ConstantRootNode(22));
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51 CallTarget main = runtime.createCallTarget(new DualCallNode(foo, bar));
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52 Object result = main.call();
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53 Assert.assertEquals(42, result);
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54 }
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56 class DualCallNode extends RootNode {
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58 private final CallTarget firstTarget;
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59 private final CallTarget secondTarget;
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61 DualCallNode(CallTarget firstTarget, CallTarget secondTarget) {
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62 this.firstTarget = firstTarget;
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63 this.secondTarget = secondTarget;
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64 }
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66 @Override
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67 public Object execute(VirtualFrame frame) {
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68 return ((Integer) firstTarget.call()) + ((Integer) secondTarget.call());
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69 }
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70 }
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72 class ConstantRootNode extends RootNode {
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73 private final int value;
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75 public ConstantRootNode(int value) {
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76 this.value = value;
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77 }
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78
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79 @Override
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80 public Object execute(VirtualFrame frame) {
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81 return value;
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82 }
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83 }
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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84 }
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85