1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @run main/othervm Upcall 27 */ 28 29 import java.lang.invoke.MethodHandles; 30 import java.nicl.Libraries; 31 import java.nicl.metadata.NativeCallback; 32 import java.nicl.metadata.NativeHeader; 33 import java.nicl.metadata.NativeLocation; 34 import java.nicl.metadata.NativeType; 35 36 public class Upcall { 37 private static final boolean DEBUG = false; 38 39 private static final int MAGIC_INTEGER = 4711; 40 41 @NativeHeader 42 public static interface upcall { 43 @NativeCallback("(i)V") 44 @FunctionalInterface 45 static interface visitor { 46 @NativeLocation(file="dummy", line=47, column=11, USR="c:@F@slowsort") 47 public void fn(int i); 48 } 49 50 @NativeLocation(file="dummy", line=47, column=11, USR="c:@F@do_upcall") 51 @NativeType(layout="(p:(i)Vi)V", ctype="void (visitor, int)", name="do_upcall") 52 public abstract void do_upcall(visitor v, int i); 53 } 54 55 public static class visitorImpl implements upcall.visitor { 56 boolean called = false; 57 58 @Override 59 public void fn(int i) { 60 called = true; 61 62 if (DEBUG) { 63 System.err.println("visit(" + i + ")"); 64 } 65 66 // value passed up from native code 67 assertEquals(i, MAGIC_INTEGER); 68 } 69 } 70 71 public void test() { 72 upcall i = Libraries.bind(upcall.class, Libraries.loadLibrary(MethodHandles.lookup(), "Upcall")); 73 visitorImpl v = new visitorImpl(); 74 75 i.do_upcall(v, MAGIC_INTEGER); 76 77 assertTrue(v.called); 78 79 if (DEBUG) { 80 System.err.println("back in test()\n"); 81 } 82 } 83 84 static void assertEquals(long expected, long actual) { 85 if (expected != actual) { 86 throw new RuntimeException("expected: " + expected + " does not match actual: " + actual); 87 } 88 } 89 90 static void assertTrue(boolean actual) { 91 if (!actual) { 92 throw new RuntimeException("expected: true does not match actual: " + actual); 93 } 94 } 95 96 public static void main(String[] args) { 97 new Upcall().test(); 98 } 99 }