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view graal/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/ArgumentsTest.java @ 10821:0910c930c66e
Method and variables' renaming
author | Christos Kotselidis <christos.kotselidis@oracle.com> |
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date | Fri, 19 Jul 2013 22:10:48 +0200 |
parents | e162d9e32830 |
children | df1d665ca846 |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.truffle.api.test; import org.junit.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; /** * <h3>Passing Arguments</h3> * * <p> * A guest language can pass its own custom arguments when invoking a Truffle method by creating a * subclass of {@link Arguments}. When invoking a call target with * {@link CallTarget#call(Arguments)}, the arguments can be passed. A Truffle node can access the * arguments passed into the Truffle method by using {@link VirtualFrame#getArguments}. * </p> * * <p> * The arguments class should only contain fields that are declared as final. This allows the * Truffle runtime to improve optimizations around guest language method calls. Also, the arguments * object must never be stored into a field. It should be created immediately before invoking * {@link CallTarget#call(Arguments)} and no longer be accessed afterwards. * </p> * * <p> * The next part of the Truffle API introduction is at {@link com.oracle.truffle.api.test.FrameTest} * . * </p> */ public class ArgumentsTest { @Test public void test() { TruffleRuntime runtime = Truffle.getRuntime(); TestRootNode rootNode = new TestRootNode(new TestArgumentNode[]{new TestArgumentNode(0), new TestArgumentNode(1)}); CallTarget target = runtime.createCallTarget(rootNode); Object result = target.call(new TestArguments(20, 22)); Assert.assertEquals(42, result); } class TestArguments extends Arguments { final int[] values; TestArguments(int... values) { this.values = values; } } class TestRootNode extends RootNode { @Children private TestArgumentNode[] children; TestRootNode(TestArgumentNode[] children) { this.children = adoptChildren(children); } @Override public Object execute(VirtualFrame frame) { int sum = 0; for (int i = 0; i < children.length; ++i) { sum += children[i].execute(frame); } return sum; } } class TestArgumentNode extends Node { private final int index; TestArgumentNode(int index) { this.index = index; } int execute(VirtualFrame frame) { return frame.getArguments(TestArguments.class).values[index]; } } }