AtomicStampedReferenceTestpublic class AtomicStampedReferenceTest extends JSR166TestCase
| Methods Summary |
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| public static void | main(java.lang.String[] args)
junit.textui.TestRunner.run (suite());
| | public static junit.framework.Test | suite()
return new TestSuite(AtomicStampedReferenceTest.class);
| | public void | testAttemptStamp()attemptStamp succeeds in single thread
int[] mark = new int[1];
AtomicStampedReference ai = new AtomicStampedReference(one, 0);
assertEquals(0, ai.getStamp());
assertTrue(ai.attemptStamp(one, 1));
assertEquals(1, ai.getStamp());
assertEquals(one, ai.get(mark));
assertEquals(1, mark[0]);
| | public void | testCompareAndSet()compareAndSet succeeds in changing values if equal to expected reference
and stamp else fails
int[] mark = new int[1];
AtomicStampedReference ai = new AtomicStampedReference(one, 0);
assertEquals(one, ai.get(mark));
assertEquals(0, ai.getStamp());
assertEquals(0, mark[0]);
assertTrue(ai.compareAndSet(one, two, 0, 0));
assertEquals(two, ai.get(mark));
assertEquals(0, mark[0]);
assertTrue(ai.compareAndSet(two, m3, 0, 1));
assertEquals(m3, ai.get(mark));
assertEquals(1, mark[0]);
assertFalse(ai.compareAndSet(two, m3, 1, 1));
assertEquals(m3, ai.get(mark));
assertEquals(1, mark[0]);
| | public void | testCompareAndSetInMultipleThreads()compareAndSet in one thread enables another waiting for reference value
to succeed
final AtomicStampedReference ai = new AtomicStampedReference(one, 0);
Thread t = new Thread(new Runnable() {
public void run() {
while(!ai.compareAndSet(two, three, 0, 0)) Thread.yield();
}});
try {
t.start();
assertTrue(ai.compareAndSet(one, two, 0, 0));
t.join(LONG_DELAY_MS);
assertFalse(t.isAlive());
assertEquals(ai.getReference(), three);
assertEquals(ai.getStamp(), 0);
}
catch(Exception e) {
unexpectedException();
}
| | public void | testCompareAndSetInMultipleThreads2()compareAndSet in one thread enables another waiting for stamp value
to succeed
final AtomicStampedReference ai = new AtomicStampedReference(one, 0);
Thread t = new Thread(new Runnable() {
public void run() {
while(!ai.compareAndSet(one, one, 1, 2)) Thread.yield();
}});
try {
t.start();
assertTrue(ai.compareAndSet(one, one, 0, 1));
t.join(LONG_DELAY_MS);
assertFalse(t.isAlive());
assertEquals(ai.getReference(), one);
assertEquals(ai.getStamp(), 2);
}
catch(Exception e) {
unexpectedException();
}
| | public void | testConstructor()constructor initializes to given reference and stamp
AtomicStampedReference ai = new AtomicStampedReference(one, 0);
assertEquals(one,ai.getReference());
assertEquals(0, ai.getStamp());
AtomicStampedReference a2 = new AtomicStampedReference(null, 1);
assertNull(a2.getReference());
assertEquals(1, a2.getStamp());
| | public void | testGetSet()get returns the last values of reference and stamp set
int[] mark = new int[1];
AtomicStampedReference ai = new AtomicStampedReference(one, 0);
assertEquals(one,ai.getReference());
assertEquals(0, ai.getStamp());
assertEquals(one, ai.get(mark));
assertEquals(0, mark[0]);
ai.set(two, 0);
assertEquals(two,ai.getReference());
assertEquals(0, ai.getStamp());
assertEquals(two, ai.get(mark));
assertEquals(0, mark[0]);
ai.set(one, 1);
assertEquals(one,ai.getReference());
assertEquals(1, ai.getStamp());
assertEquals(one, ai.get(mark));
assertEquals(1,mark[0]);
| | public void | testWeakCompareAndSet()repeated weakCompareAndSet succeeds in changing values when equal
to expected
int[] mark = new int[1];
AtomicStampedReference ai = new AtomicStampedReference(one, 0);
assertEquals(one, ai.get(mark));
assertEquals(0, ai.getStamp ());
assertEquals(0, mark[0]);
while(!ai.weakCompareAndSet(one, two, 0, 0));
assertEquals(two, ai.get(mark));
assertEquals(0, mark[0]);
while(!ai.weakCompareAndSet(two, m3, 0, 1));
assertEquals(m3, ai.get(mark));
assertEquals(1, mark[0]);
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