Mercurial > hg > truffle
view truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/ArgumentsTest.java @ 22424:fec62e298245
Rename package truffle.api.test to truffle.api to enable package-protected API access for testing.
author | Christian Humer <christian.humer@oracle.com> |
---|---|
date | Wed, 02 Dec 2015 15:16:27 +0100 |
parents | truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/ArgumentsTest.java@0d36601f233e |
children | b39b603e2a1e |
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/* * Copyright (c) 2012, 2013, 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; import org.junit.After; import org.junit.Assert; import org.junit.Before; import org.junit.Test; import com.oracle.truffle.api.CallTarget; import com.oracle.truffle.api.Truffle; import com.oracle.truffle.api.TruffleRuntime; import com.oracle.truffle.api.frame.VirtualFrame; import com.oracle.truffle.api.nodes.Node; import com.oracle.truffle.api.nodes.RootNode; import com.oracle.truffle.api.utilities.InstrumentationTestMode; /** * <h3>Passing Arguments</h3> * * <p> * When invoking a call target with {@link CallTarget#call(Object[])}, 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 array must never be stored into a field. It should be created immediately before invoking * {@link CallTarget#call(Object[])} and no longer be accessed afterwards. * </p> * * <p> * The next part of the Truffle API introduction is at {@link com.oracle.truffle.api.FrameTest} * . * </p> */ public class ArgumentsTest { @Before public void before() { InstrumentationTestMode.set(true); } @After public void after() { InstrumentationTestMode.set(false); } @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 Object[]{20, 22}); Assert.assertEquals(42, result); } private static class TestRootNode extends RootNode { @Children private final TestArgumentNode[] children; TestRootNode(TestArgumentNode[] children) { super(TestingLanguage.class, null, null); this.children = 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; } } private static class TestArgumentNode extends Node { private final int index; TestArgumentNode(int index) { super(null); this.index = index; } int execute(VirtualFrame frame) { return (Integer) frame.getArguments()[index]; } } }