Søren Gjesse | 75996df | 2022-12-12 13:08:20 +0100 | [diff] [blame^] | 1 | // Copyright (c) 2022, the R8 project authors. Please see the AUTHORS file |
| 2 | // for details. All rights reserved. Use of this source code is governed by a |
| 3 | // BSD-style license that can be found in the LICENSE file. |
| 4 | package varhandle; |
| 5 | |
| 6 | import java.lang.invoke.MethodHandles; |
| 7 | import java.lang.invoke.VarHandle; |
| 8 | |
| 9 | public class InstanceByteField { |
| 10 | |
| 11 | private byte field; |
| 12 | |
| 13 | public static void testSet(VarHandle varHandle) { |
| 14 | System.out.println("testGet"); |
| 15 | |
| 16 | InstanceByteField instance = new InstanceByteField(); |
| 17 | System.out.println(varHandle.get(instance)); |
| 18 | |
| 19 | // byte and Byte values. |
| 20 | varHandle.set(instance, (byte) 1); |
| 21 | System.out.println((byte) varHandle.get(instance)); |
| 22 | varHandle.set(instance, Byte.valueOf((byte) 2)); |
| 23 | System.out.println(varHandle.get(instance)); |
| 24 | } |
| 25 | |
| 26 | public static void testCompareAndSet(VarHandle varHandle) { |
| 27 | System.out.println("testCompareAndSet"); |
| 28 | |
| 29 | InstanceByteField instance = new InstanceByteField(); |
| 30 | |
| 31 | // byte and Byte values. |
| 32 | varHandle.compareAndSet(instance, (byte) 1, (byte) 2); |
| 33 | System.out.println((byte) varHandle.get(instance)); |
| 34 | varHandle.compareAndSet(instance, (byte) 0, (byte) 1); |
| 35 | System.out.println((byte) varHandle.get(instance)); |
| 36 | varHandle.compareAndSet(instance, Byte.valueOf((byte) 1), (byte) 2); |
| 37 | System.out.println(varHandle.get(instance)); |
| 38 | varHandle.compareAndSet(instance, (byte) 2, Byte.valueOf((byte) 3)); |
| 39 | System.out.println(varHandle.get(instance)); |
| 40 | varHandle.compareAndSet(instance, Byte.valueOf((byte) 3), Byte.valueOf((byte) 4)); |
| 41 | System.out.println(varHandle.get(instance)); |
| 42 | } |
| 43 | |
| 44 | public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException { |
| 45 | VarHandle varHandle; |
| 46 | try { |
| 47 | varHandle = |
| 48 | MethodHandles.lookup().findVarHandle(InstanceByteField.class, "field", byte.class); |
| 49 | } catch (UnsupportedOperationException e) { |
| 50 | System.out.println("Got UnsupportedOperationException"); |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | testSet(varHandle); |
| 55 | testCompareAndSet(varHandle); |
| 56 | } |
| 57 | } |