/*
* Copyright (c) 2012 Aleksey Shipilev
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.shipilev.concurrent.torture.tests.volatiles;
import net.shipilev.concurrent.torture.tests.OneActorOneObserverTest;
/**
* Tests if volatile write-read induce proper happens-before.
*
* @author Aleksey Shipilev (aleksey.shipilev@oracle.com)
*/
public class ReadAfterVolatileReadTest implements OneActorOneObserverTest<ReadAfterVolatileReadTest.Specimen> {
public static class Specimen {
int x;
volatile int y;
}
@Override
public void actor1(Specimen s) {
s.x = 1;
s.x = 2;
s.y = 1;
s.x = 3;
}
@Override
public void observe(Specimen s, byte[] res) {
res[0] = (byte) s.y;
res[1] = (byte) s.x;
}
@Override
public Specimen newState() {
return new Specimen();
}
@Override
public int resultSize() {
return 2;
}
}