VolatileTest.java

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package com.oracle.truffle.api.object.dsl.test;

import org.junit.Test;

import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.object.dsl.Layout;
import com.oracle.truffle.api.object.dsl.Volatile;

import org.junit.Assert;

public class VolatileTest {

    @Layout
    public interface VolatileTestLayout {

        DynamicObject createVolatileTest(@Volatile int volatileValue);

        int getVolatileValue(DynamicObject object);

        void setVolatileValue(DynamicObject object, int value);

        boolean compareAndSetVolatileValue(DynamicObject object, int expectedValue, int value);

        int getAndSetVolatileValue(DynamicObject object, int value);

    }

    private static final VolatileTestLayout LAYOUT = VolatileTestLayoutImpl.INSTANCE;

    @Test
    public void testGetVolatile() {
        final DynamicObject object = LAYOUT.createVolatileTest(14);
        Assert.assertEquals(14, LAYOUT.getVolatileValue(object));
    }

    @Test
    public void testSetVolatile() {
        final DynamicObject object = LAYOUT.createVolatileTest(14);
        Assert.assertEquals(14, LAYOUT.getVolatileValue(object));
        LAYOUT.setVolatileValue(object, 22);
        Assert.assertEquals(22, LAYOUT.getVolatileValue(object));
    }

    @Test
    public void testCompareAndSetSuccess() {
        final DynamicObject object = LAYOUT.createVolatileTest(14);
        Assert.assertEquals(14, LAYOUT.getVolatileValue(object));
        Assert.assertTrue(LAYOUT.compareAndSetVolatileValue(object, 14, 22));
        Assert.assertEquals(22, LAYOUT.getVolatileValue(object));
    }

    @Test
    public void testCompareAndSetFailure() {
        final DynamicObject object = LAYOUT.createVolatileTest(14);
        Assert.assertEquals(14, LAYOUT.getVolatileValue(object));
        Assert.assertFalse(LAYOUT.compareAndSetVolatileValue(object, 44, 22));
    }

    @Test
    public void testGetAndSetVolatile() {
        final DynamicObject object = LAYOUT.createVolatileTest(14);
        Assert.assertEquals(14, LAYOUT.getVolatileValue(object));
        Assert.assertEquals(14, LAYOUT.getAndSetVolatileValue(object, 22));
        Assert.assertEquals(22, LAYOUT.getVolatileValue(object));
    }

}