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/* |
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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/publicdomain/zero/1.0/ |
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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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|
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import java.util.Arrays; |
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import java.util.concurrent.atomic.AtomicReferenceArray; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class AtomicReferenceArrayTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(AtomicReferenceArrayTest.class); |
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} |
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|
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/** |
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* constructor creates array of given size with all elements null |
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*/ |
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public void testConstructor() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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assertNull(aa.get(i)); |
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} |
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} |
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|
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/** |
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* constructor with null array throws NPE |
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*/ |
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public void testConstructor2NPE() { |
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try { |
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Integer[] a = null; |
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new AtomicReferenceArray<Integer>(a); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* constructor with array is of same size and has all elements |
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*/ |
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public void testConstructor2() { |
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Integer[] a = { two, one, three, four, seven }; |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a); |
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assertEquals(a.length, aa.length()); |
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for (int i = 0; i < a.length; i++) |
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assertEquals(a[i], aa.get(i)); |
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} |
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|
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/** |
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* Initialize AtomicReferenceArray<Class> with SubClass[] |
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*/ |
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public void testConstructorSubClassArray() { |
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Integer[] a = { two, one, three, four, seven }; |
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AtomicReferenceArray<Number> aa = new AtomicReferenceArray<Number>(a); |
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assertEquals(a.length, aa.length()); |
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for (int i = 0; i < a.length; i++) { |
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assertSame(a[i], aa.get(i)); |
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Long x = Long.valueOf(i); |
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aa.set(i, x); |
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assertSame(x, aa.get(i)); |
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} |
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} |
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|
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/** |
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* get and set for out of bound indices throw IndexOutOfBoundsException |
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*/ |
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public void testIndexing() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int index : new int[] { -1, SIZE }) { |
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try { |
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aa.get(index); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.set(index, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.lazySet(index, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.compareAndSet(index, null, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.weakCompareAndSet(index, null, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.getPlain(index); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.getOpaque(index); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.getAcquire(index); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.setPlain(index, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.setOpaque(index, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.setRelease(index, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.compareAndExchange(index, null, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.compareAndExchangeAcquire(index, null, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.compareAndExchangeRelease(index, null, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.weakCompareAndSetVolatile(index, null, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.weakCompareAndSetAcquire(index, null, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.weakCompareAndSetRelease(index, null, null); |
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shouldThrow(); |
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} catch (IndexOutOfBoundsException success) {} |
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} |
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} |
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|
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/** |
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* get returns the last value set at index |
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*/ |
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public void testGetSet() { |
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AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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assertSame(one, aa.get(i)); |
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aa.set(i, two); |
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assertSame(two, aa.get(i)); |
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aa.set(i, m3); |
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assertSame(m3, aa.get(i)); |
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} |
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} |
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|
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/** |
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* get returns the last value lazySet at index by same thread |
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*/ |
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public void testGetLazySet() { |
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AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.lazySet(i, one); |
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assertSame(one, aa.get(i)); |
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aa.lazySet(i, two); |
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assertSame(two, aa.get(i)); |
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aa.lazySet(i, m3); |
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assertSame(m3, aa.get(i)); |
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} |
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} |
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|
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/** |
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* compareAndSet succeeds in changing value if equal to expected else fails |
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*/ |
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public void testCompareAndSet() { |
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AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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assertTrue(aa.compareAndSet(i, one, two)); |
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assertTrue(aa.compareAndSet(i, two, m4)); |
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assertSame(m4, aa.get(i)); |
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assertFalse(aa.compareAndSet(i, m5, seven)); |
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assertSame(m4, aa.get(i)); |
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assertTrue(aa.compareAndSet(i, m4, seven)); |
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assertSame(seven, aa.get(i)); |
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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 value |
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* to succeed |
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*/ |
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public void testCompareAndSetInMultipleThreads() throws InterruptedException { |
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final AtomicReferenceArray a = new AtomicReferenceArray(1); |
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a.set(0, one); |
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Thread t = new Thread(new CheckedRunnable() { |
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public void realRun() { |
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while (!a.compareAndSet(0, two, three)) |
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Thread.yield(); |
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}}); |
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|
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t.start(); |
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assertTrue(a.compareAndSet(0, one, two)); |
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t.join(LONG_DELAY_MS); |
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assertFalse(t.isAlive()); |
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assertSame(three, a.get(0)); |
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} |
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|
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/** |
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* repeated weakCompareAndSet succeeds in changing value when equal |
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* to expected |
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*/ |
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public void testWeakCompareAndSet() { |
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AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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do {} while (!aa.weakCompareAndSet(i, one, two)); |
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do {} while (!aa.weakCompareAndSet(i, two, m4)); |
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assertSame(m4, aa.get(i)); |
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do {} while (!aa.weakCompareAndSet(i, m4, seven)); |
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assertSame(seven, aa.get(i)); |
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} |
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} |
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|
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/** |
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* getAndSet returns previous value and sets to given value at given index |
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*/ |
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public void testGetAndSet() { |
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AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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assertSame(one, aa.getAndSet(i, zero)); |
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assertSame(zero, aa.getAndSet(i, m10)); |
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assertSame(m10, aa.getAndSet(i, one)); |
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} |
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} |
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|
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/** |
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* a deserialized serialized array holds same values |
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*/ |
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public void testSerialization() throws Exception { |
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AtomicReferenceArray x = new AtomicReferenceArray(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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x.set(i, new Integer(-i)); |
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} |
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AtomicReferenceArray y = serialClone(x); |
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assertNotSame(x, y); |
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assertEquals(x.length(), y.length()); |
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for (int i = 0; i < SIZE; i++) { |
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assertEquals(x.get(i), y.get(i)); |
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} |
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} |
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|
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/** |
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* toString returns current value. |
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*/ |
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public void testToString() { |
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Integer[] a = { two, one, three, four, seven }; |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a); |
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assertEquals(Arrays.toString(a), aa.toString()); |
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} |
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|
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// jdk9 |
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|
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/** |
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* getPlain returns the last value set |
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*/ |
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public void testGetPlainSet() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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assertEquals(one, aa.getPlain(i)); |
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aa.set(i, two); |
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assertEquals(two, aa.getPlain(i)); |
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aa.set(i, m3); |
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assertEquals(m3, aa.getPlain(i)); |
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} |
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} |
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|
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/** |
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* getOpaque returns the last value set |
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*/ |
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public void testGetOpaqueSet() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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assertEquals(one, aa.getOpaque(i)); |
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aa.set(i, two); |
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assertEquals(two, aa.getOpaque(i)); |
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aa.set(i, m3); |
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assertEquals(m3, aa.getOpaque(i)); |
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} |
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} |
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|
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/** |
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* getAcquire returns the last value set |
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*/ |
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public void testGetAcquireSet() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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assertEquals(one, aa.getAcquire(i)); |
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aa.set(i, two); |
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assertEquals(two, aa.getAcquire(i)); |
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aa.set(i, m3); |
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assertEquals(m3, aa.getAcquire(i)); |
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} |
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} |
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|
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/** |
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* get returns the last value setPlain |
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*/ |
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public void testGetSetPlain() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.setPlain(i, one); |
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assertEquals(one, aa.get(i)); |
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aa.setPlain(i, two); |
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assertEquals(two, aa.get(i)); |
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aa.setPlain(i, m3); |
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assertEquals(m3, aa.get(i)); |
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} |
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} |
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|
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/** |
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* get returns the last value setOpaque |
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*/ |
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public void testGetSetOpaque() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.setOpaque(i, one); |
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assertEquals(one, aa.get(i)); |
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aa.setOpaque(i, two); |
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assertEquals(two, aa.get(i)); |
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aa.setOpaque(i, m3); |
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assertEquals(m3, aa.get(i)); |
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} |
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} |
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|
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/** |
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* get returns the last value setRelease |
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*/ |
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public void testGetSetRelease() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.setRelease(i, one); |
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assertEquals(one, aa.get(i)); |
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aa.setRelease(i, two); |
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assertEquals(two, aa.get(i)); |
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aa.setRelease(i, m3); |
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assertEquals(m3, aa.get(i)); |
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} |
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} |
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|
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/** |
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* compareAndExchange succeeds in changing value if equal to |
| 362 |
* expected else fails |
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*/ |
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public void testCompareAndExchange() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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assertEquals(one, aa.compareAndExchange(i, one, two)); |
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assertEquals(two, aa.compareAndExchange(i, two, m4)); |
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assertEquals(m4, aa.get(i)); |
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assertEquals(m4, aa.compareAndExchange(i,m5, seven)); |
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assertEquals(m4, aa.get(i)); |
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assertEquals(m4, aa.compareAndExchange(i, m4, seven)); |
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assertEquals(seven, aa.get(i)); |
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} |
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} |
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|
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/** |
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* compareAndExchangeAcquire succeeds in changing value if equal to |
| 380 |
* expected else fails |
| 381 |
*/ |
| 382 |
public void testCompareAndExchangeAcquire() { |
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AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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aa.set(i, one); |
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assertEquals(one, aa.compareAndExchangeAcquire(i, one, two)); |
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assertEquals(two, aa.compareAndExchangeAcquire(i, two, m4)); |
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assertEquals(m4, aa.get(i)); |
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assertEquals(m4, aa.compareAndExchangeAcquire(i,m5, seven)); |
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assertEquals(m4, aa.get(i)); |
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assertEquals(m4, aa.compareAndExchangeAcquire(i, m4, seven)); |
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assertEquals(seven, aa.get(i)); |
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} |
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} |
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|
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/** |
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* compareAndExchangeRelease succeeds in changing value if equal to |
| 398 |
* expected else fails |
| 399 |
*/ |
| 400 |
public void testCompareAndExchangeRelease() { |
| 401 |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
| 402 |
for (int i = 0; i < SIZE; i++) { |
| 403 |
aa.set(i, one); |
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assertEquals(one, aa.compareAndExchangeRelease(i, one, two)); |
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assertEquals(two, aa.compareAndExchangeRelease(i, two, m4)); |
| 406 |
assertEquals(m4, aa.get(i)); |
| 407 |
assertEquals(m4, aa.compareAndExchangeRelease(i,m5, seven)); |
| 408 |
assertEquals(m4, aa.get(i)); |
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assertEquals(m4, aa.compareAndExchangeRelease(i, m4, seven)); |
| 410 |
assertEquals(seven, aa.get(i)); |
| 411 |
} |
| 412 |
} |
| 413 |
|
| 414 |
/** |
| 415 |
* repeated weakCompareAndSetVolatile succeeds in changing value when equal |
| 416 |
* to expected |
| 417 |
*/ |
| 418 |
public void testWeakCompareAndSetVolatile() { |
| 419 |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
| 420 |
for (int i = 0; i < SIZE; i++) { |
| 421 |
aa.set(i, one); |
| 422 |
do {} while (!aa.weakCompareAndSetVolatile(i, one, two)); |
| 423 |
do {} while (!aa.weakCompareAndSetVolatile(i, two, m4)); |
| 424 |
assertEquals(m4, aa.get(i)); |
| 425 |
do {} while (!aa.weakCompareAndSetVolatile(i, m4, seven)); |
| 426 |
assertEquals(seven, aa.get(i)); |
| 427 |
} |
| 428 |
} |
| 429 |
|
| 430 |
/** |
| 431 |
* repeated weakCompareAndSetAcquire succeeds in changing value when equal |
| 432 |
* to expected |
| 433 |
*/ |
| 434 |
public void testWeakCompareAndSetAcquire() { |
| 435 |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
| 436 |
for (int i = 0; i < SIZE; i++) { |
| 437 |
aa.set(i, one); |
| 438 |
do {} while (!aa.weakCompareAndSetAcquire(i, one, two)); |
| 439 |
do {} while (!aa.weakCompareAndSetAcquire(i, two, m4)); |
| 440 |
assertEquals(m4, aa.get(i)); |
| 441 |
do {} while (!aa.weakCompareAndSetAcquire(i, m4, seven)); |
| 442 |
assertEquals(seven, aa.get(i)); |
| 443 |
} |
| 444 |
} |
| 445 |
|
| 446 |
/** |
| 447 |
* repeated weakCompareAndSetRelease succeeds in changing value when equal |
| 448 |
* to expected |
| 449 |
*/ |
| 450 |
public void testWeakCompareAndSetRelease() { |
| 451 |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
| 452 |
for (int i = 0; i < SIZE; i++) { |
| 453 |
aa.set(i, one); |
| 454 |
do {} while (!aa.weakCompareAndSetRelease(i, one, two)); |
| 455 |
do {} while (!aa.weakCompareAndSetRelease(i, two, m4)); |
| 456 |
assertEquals(m4, aa.get(i)); |
| 457 |
do {} while (!aa.weakCompareAndSetRelease(i, m4, seven)); |
| 458 |
assertEquals(seven, aa.get(i)); |
| 459 |
} |
| 460 |
} |
| 461 |
|
| 462 |
} |
