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dl |
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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.atomic.*; |
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public class AtomicStampedReferenceTest extends TestCase{ |
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public static void main (String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(AtomicStampedReferenceTest.class); |
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} |
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static final Integer zero = new Integer(0); |
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static final Integer one = new Integer(1); |
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static final Integer two = new Integer(2); |
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static final Integer m3 = new Integer(-3); |
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public void testConstructor(){ |
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AtomicStampedReference ai = new AtomicStampedReference(one, 0); |
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assertEquals(one,ai.getReference()); |
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assertEquals(0, ai.getStamp()); |
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AtomicStampedReference a2 = new AtomicStampedReference(null, 1); |
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assertNull(a2.getReference()); |
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assertEquals(1, a2.getStamp()); |
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} |
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public void testGetSet(){ |
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int[] mark = new int[1]; |
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AtomicStampedReference ai = new AtomicStampedReference(one, 0); |
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assertEquals(one,ai.getReference()); |
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assertEquals(0, ai.getStamp()); |
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assertEquals(one, ai.get(mark)); |
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assertEquals(0, mark[0]); |
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ai.set(two, 0); |
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assertEquals(two,ai.getReference()); |
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assertEquals(0, ai.getStamp()); |
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assertEquals(two, ai.get(mark)); |
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assertEquals(0, mark[0]); |
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ai.set(one, 1); |
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assertEquals(one,ai.getReference()); |
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assertEquals(1, ai.getStamp()); |
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assertEquals(one, ai.get(mark)); |
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assertEquals(1,mark[0]); |
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} |
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public void testAttemptStamp(){ |
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int[] mark = new int[1]; |
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AtomicStampedReference ai = new AtomicStampedReference(one, 0); |
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assertEquals(0, ai.getStamp()); |
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assertTrue(ai.attemptStamp(one, 1)); |
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assertEquals(1, ai.getStamp()); |
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assertEquals(one, ai.get(mark)); |
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assertEquals(1, mark[0]); |
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} |
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public void testCompareAndSet(){ |
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int[] mark = new int[1]; |
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AtomicStampedReference ai = new AtomicStampedReference(one, 0); |
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assertEquals(one, ai.get(mark)); |
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assertEquals(0, ai.getStamp()); |
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assertEquals(0, mark[0]); |
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assertTrue(ai.compareAndSet(one, two, 0, 0)); |
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assertEquals(two, ai.get(mark)); |
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assertEquals(0, mark[0]); |
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assertTrue(ai.compareAndSet(two, m3, 0, 1)); |
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assertEquals(m3, ai.get(mark)); |
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assertEquals(1, mark[0]); |
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assertFalse(ai.compareAndSet(two, m3, 1, 1)); |
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assertEquals(m3, ai.get(mark)); |
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assertEquals(1, mark[0]); |
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} |
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public void testWeakCompareAndSet(){ |
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int[] mark = new int[1]; |
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AtomicStampedReference ai = new AtomicStampedReference(one, 0); |
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assertEquals(one, ai.get(mark)); |
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assertEquals(0, ai.getStamp ()); |
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assertEquals(0, mark[0]); |
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while(!ai.weakCompareAndSet(one, two, 0, 0)); |
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assertEquals(two, ai.get(mark)); |
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assertEquals(0, mark[0]); |
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while(!ai.weakCompareAndSet(two, m3, 0, 1)); |
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assertEquals(m3, ai.get(mark)); |
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assertEquals(1, mark[0]); |
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} |
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} |
