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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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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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public static Test suite() { |
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return new TestSuite(AtomicMarkableReferenceTest.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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/** |
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* |
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* constructor initializes to given reference and mark |
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*/ |
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public void testConstructor(){ |
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AtomicMarkableReference ai = new AtomicMarkableReference(one, false); |
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} |
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/** |
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* |
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* get returns the last values of reference and mark set |
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*/ |
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public void testGetSet(){ |
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boolean[] mark = new boolean[1]; |
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} |
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/** |
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* |
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* attemptMark succeeds in single thread |
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*/ |
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public void testAttemptMark(){ |
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boolean[] mark = new boolean[1]; |
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} |
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/** |
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* |
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* compareAndSet succeeds in changing values if equal to expected reference |
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* and mark else fails |
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*/ |
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public void testCompareAndSet(){ |
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boolean[] mark = new boolean[1]; |
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} |
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/** |
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* |
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* compareAndSet in one thread enables another waiting for reference value |
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* to succeed |
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*/ |
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public void testCompareAndSetInMultipleThreads() { |
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final AtomicMarkableReference ai = new AtomicMarkableReference(one, false); |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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while(!ai.compareAndSet(two, three, false, false)) Thread.yield(); |
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}}); |
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try { |
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t.start(); |
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assertTrue(ai.compareAndSet(one, two, false, false)); |
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t.join(LONG_DELAY_MS); |
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assertFalse(t.isAlive()); |
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assertEquals(ai.getReference(), three); |
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assertFalse(ai.isMarked()); |
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} |
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catch(Exception e) { |
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unexpectedException(); |
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} |
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} |
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|
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/** |
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* compareAndSet in one thread enables another waiting for mark value |
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* to succeed |
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*/ |
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public void testCompareAndSetInMultipleThreads2() { |
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final AtomicMarkableReference ai = new AtomicMarkableReference(one, false); |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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while(!ai.compareAndSet(one, one, true, false)) Thread.yield(); |
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}}); |
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try { |
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t.start(); |
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assertTrue(ai.compareAndSet(one, one, false, true)); |
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t.join(LONG_DELAY_MS); |
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assertFalse(t.isAlive()); |
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assertEquals(ai.getReference(), one); |
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assertFalse(ai.isMarked()); |
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} |
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catch(Exception e) { |
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unexpectedException(); |
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} |
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} |
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/** |
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* repeated weakCompareAndSet succeeds in changing values when equal |
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* to expected |
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*/ |
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public void testWeakCompareAndSet(){ |
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boolean[] mark = new boolean[1]; |