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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/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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* 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 junit.framework.*; |
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import java.util.concurrent.atomic.*; |
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import java.io.*; |
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|
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public class AtomicReferenceArrayTest extends JSR166TestCase |
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{ |
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public static void main (String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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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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* 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> ai = new AtomicReferenceArray<Integer>(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertNull(ai.get(i)); |
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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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* get and set for out of bound indices throw IndexOutOfBoundsException |
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* constructor with null array throws NPE |
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*/ |
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public void testIndexing(){ |
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AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE); |
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try { |
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ai.get(SIZE); |
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} catch(IndexOutOfBoundsException success){ |
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} |
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try { |
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ai.get(-1); |
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} catch(IndexOutOfBoundsException success){ |
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} |
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public void testConstructor2NPE() { |
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try { |
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ai.set(SIZE, null); |
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} catch(IndexOutOfBoundsException success){ |
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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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try { |
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ai.set(-1, null); |
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} catch(IndexOutOfBoundsException success){ |
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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) {} |
80 |
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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) {} |
88 |
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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) {} |
108 |
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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(); |
115 |
> |
} catch (IndexOutOfBoundsException success) {} |
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try { |
117 |
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aa.setRelease(index, null); |
118 |
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shouldThrow(); |
119 |
> |
} catch (IndexOutOfBoundsException success) {} |
120 |
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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) {} |
124 |
> |
try { |
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aa.compareAndExchangeAcquire(index, null, null); |
126 |
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shouldThrow(); |
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> |
} catch (IndexOutOfBoundsException success) {} |
128 |
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try { |
129 |
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aa.compareAndExchangeRelease(index, null, null); |
130 |
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shouldThrow(); |
131 |
> |
} catch (IndexOutOfBoundsException success) {} |
132 |
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try { |
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aa.weakCompareAndSetVolatile(index, null, null); |
134 |
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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(); |
139 |
> |
} catch (IndexOutOfBoundsException success) {} |
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try { |
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aa.weakCompareAndSetRelease(index, null, null); |
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shouldThrow(); |
143 |
> |
} 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 |
149 |
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*/ |
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public void testGetSet(){ |
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AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
152 |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, one); |
154 |
< |
assertEquals(one,ai.get(i)); |
155 |
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ai.set(i, two); |
156 |
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assertEquals(two,ai.get(i)); |
157 |
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ai.set(i, m3); |
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assertEquals(m3,ai.get(i)); |
150 |
> |
public void testGetSet() { |
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> |
AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
152 |
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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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> |
} |
161 |
> |
|
162 |
> |
/** |
163 |
> |
* get returns the last value lazySet at index by same thread |
164 |
> |
*/ |
165 |
> |
public void testGetLazySet() { |
166 |
> |
AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
167 |
> |
for (int i = 0; i < SIZE; i++) { |
168 |
> |
aa.lazySet(i, one); |
169 |
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assertSame(one, aa.get(i)); |
170 |
> |
aa.lazySet(i, two); |
171 |
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assertSame(two, aa.get(i)); |
172 |
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aa.lazySet(i, m3); |
173 |
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assertSame(m3, aa.get(i)); |
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} |
175 |
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} |
176 |
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|
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/** |
178 |
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* compareAndSet succeeds in changing value if equal to expected else fails |
179 |
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*/ |
180 |
< |
public void testCompareAndSet(){ |
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AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
182 |
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for (int i = 0; i < SIZE; ++i) { |
183 |
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ai.set(i, one); |
184 |
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assertTrue(ai.compareAndSet(i, one,two)); |
185 |
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assertTrue(ai.compareAndSet(i, two,m4)); |
186 |
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assertEquals(m4,ai.get(i)); |
187 |
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assertFalse(ai.compareAndSet(i, m5,seven)); |
188 |
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assertFalse((seven.equals(ai.get(i)))); |
189 |
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assertTrue(ai.compareAndSet(i, m4,seven)); |
190 |
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assertEquals(seven,ai.get(i)); |
180 |
> |
public void testCompareAndSet() { |
181 |
> |
AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
182 |
> |
for (int i = 0; i < SIZE; i++) { |
183 |
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aa.set(i, one); |
184 |
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assertTrue(aa.compareAndSet(i, one, two)); |
185 |
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assertTrue(aa.compareAndSet(i, two, m4)); |
186 |
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assertSame(m4, aa.get(i)); |
187 |
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assertFalse(aa.compareAndSet(i, m5, seven)); |
188 |
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assertSame(m4, aa.get(i)); |
189 |
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assertTrue(aa.compareAndSet(i, m4, seven)); |
190 |
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assertSame(seven, aa.get(i)); |
191 |
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} |
192 |
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} |
193 |
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|
195 |
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* compareAndSet in one thread enables another waiting for value |
196 |
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* to succeed |
197 |
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*/ |
198 |
< |
public void testCompareAndSetInMultipleThreads() { |
198 |
> |
public void testCompareAndSetInMultipleThreads() throws InterruptedException { |
199 |
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final AtomicReferenceArray a = new AtomicReferenceArray(1); |
200 |
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a.set(0, one); |
201 |
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Thread t = new Thread(new Runnable() { |
202 |
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public void run() { |
203 |
< |
while(!a.compareAndSet(0, two, three)) Thread.yield(); |
204 |
< |
}}); |
205 |
< |
try { |
206 |
< |
t.start(); |
207 |
< |
assertTrue(a.compareAndSet(0, one, two)); |
208 |
< |
t.join(LONG_DELAY_MS); |
209 |
< |
assertFalse(t.isAlive()); |
210 |
< |
assertEquals(a.get(0), three); |
211 |
< |
} |
105 |
< |
catch(Exception e) { |
106 |
< |
unexpectedException(); |
107 |
< |
} |
201 |
> |
Thread t = new Thread(new CheckedRunnable() { |
202 |
> |
public void realRun() { |
203 |
> |
while (!a.compareAndSet(0, two, three)) |
204 |
> |
Thread.yield(); |
205 |
> |
}}); |
206 |
> |
|
207 |
> |
t.start(); |
208 |
> |
assertTrue(a.compareAndSet(0, one, two)); |
209 |
> |
t.join(LONG_DELAY_MS); |
210 |
> |
assertFalse(t.isAlive()); |
211 |
> |
assertSame(three, a.get(0)); |
212 |
|
} |
213 |
|
|
214 |
|
/** |
215 |
|
* repeated weakCompareAndSet succeeds in changing value when equal |
216 |
< |
* to expected |
216 |
> |
* to expected |
217 |
|
*/ |
218 |
< |
public void testWeakCompareAndSet(){ |
219 |
< |
AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
220 |
< |
for (int i = 0; i < SIZE; ++i) { |
221 |
< |
ai.set(i, one); |
222 |
< |
while(!ai.weakCompareAndSet(i, one,two)); |
223 |
< |
while(!ai.weakCompareAndSet(i, two,m4)); |
224 |
< |
assertEquals(m4,ai.get(i)); |
225 |
< |
while(!ai.weakCompareAndSet(i, m4,seven)); |
226 |
< |
assertEquals(seven,ai.get(i)); |
218 |
> |
public void testWeakCompareAndSet() { |
219 |
> |
AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
220 |
> |
for (int i = 0; i < SIZE; i++) { |
221 |
> |
aa.set(i, one); |
222 |
> |
do {} while (!aa.weakCompareAndSet(i, one, two)); |
223 |
> |
do {} while (!aa.weakCompareAndSet(i, two, m4)); |
224 |
> |
assertSame(m4, aa.get(i)); |
225 |
> |
do {} while (!aa.weakCompareAndSet(i, m4, seven)); |
226 |
> |
assertSame(seven, aa.get(i)); |
227 |
|
} |
228 |
|
} |
229 |
|
|
230 |
|
/** |
231 |
|
* getAndSet returns previous value and sets to given value at given index |
232 |
|
*/ |
233 |
< |
public void testGetAndSet(){ |
234 |
< |
AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
235 |
< |
for (int i = 0; i < SIZE; ++i) { |
236 |
< |
ai.set(i, one); |
237 |
< |
assertEquals(one,ai.getAndSet(i,zero)); |
238 |
< |
assertEquals(0,ai.getAndSet(i,m10)); |
239 |
< |
assertEquals(m10,ai.getAndSet(i,one)); |
233 |
> |
public void testGetAndSet() { |
234 |
> |
AtomicReferenceArray aa = new AtomicReferenceArray(SIZE); |
235 |
> |
for (int i = 0; i < SIZE; i++) { |
236 |
> |
aa.set(i, one); |
237 |
> |
assertSame(one, aa.getAndSet(i, zero)); |
238 |
> |
assertSame(zero, aa.getAndSet(i, m10)); |
239 |
> |
assertSame(m10, aa.getAndSet(i, one)); |
240 |
|
} |
241 |
|
} |
242 |
|
|
243 |
|
/** |
244 |
|
* a deserialized serialized array holds same values |
245 |
|
*/ |
246 |
< |
public void testSerialization() { |
247 |
< |
AtomicReferenceArray l = new AtomicReferenceArray(SIZE); |
248 |
< |
for (int i = 0; i < SIZE; ++i) { |
249 |
< |
l.set(i, new Integer(-i)); |
246 |
> |
public void testSerialization() throws Exception { |
247 |
> |
AtomicReferenceArray x = new AtomicReferenceArray(SIZE); |
248 |
> |
for (int i = 0; i < SIZE; i++) { |
249 |
> |
x.set(i, new Integer(-i)); |
250 |
> |
} |
251 |
> |
AtomicReferenceArray y = serialClone(x); |
252 |
> |
assertNotSame(x, y); |
253 |
> |
assertEquals(x.length(), y.length()); |
254 |
> |
for (int i = 0; i < SIZE; i++) { |
255 |
> |
assertEquals(x.get(i), y.get(i)); |
256 |
|
} |
257 |
+ |
} |
258 |
|
|
259 |
< |
try { |
260 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
261 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
262 |
< |
out.writeObject(l); |
263 |
< |
out.close(); |
264 |
< |
|
265 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
266 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
267 |
< |
AtomicReferenceArray r = (AtomicReferenceArray) in.readObject(); |
268 |
< |
assertEquals(l.length(), r.length()); |
269 |
< |
for (int i = 0; i < SIZE; ++i) { |
270 |
< |
assertEquals(r.get(i), l.get(i)); |
271 |
< |
} |
272 |
< |
} catch(Exception e){ |
273 |
< |
unexpectedException(); |
259 |
> |
/** |
260 |
> |
* toString returns current value. |
261 |
> |
*/ |
262 |
> |
public void testToString() { |
263 |
> |
Integer[] a = { two, one, three, four, seven }; |
264 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a); |
265 |
> |
assertEquals(Arrays.toString(a), aa.toString()); |
266 |
> |
} |
267 |
> |
|
268 |
> |
// jdk9 |
269 |
> |
|
270 |
> |
/** |
271 |
> |
* getPlain returns the last value set |
272 |
> |
*/ |
273 |
> |
public void testGetPlainSet() { |
274 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
275 |
> |
for (int i = 0; i < SIZE; i++) { |
276 |
> |
aa.set(i, one); |
277 |
> |
assertEquals(one, aa.getPlain(i)); |
278 |
> |
aa.set(i, two); |
279 |
> |
assertEquals(two, aa.getPlain(i)); |
280 |
> |
aa.set(i, m3); |
281 |
> |
assertEquals(m3, aa.getPlain(i)); |
282 |
> |
} |
283 |
> |
} |
284 |
> |
|
285 |
> |
/** |
286 |
> |
* getOpaque returns the last value set |
287 |
> |
*/ |
288 |
> |
public void testGetOpaqueSet() { |
289 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
290 |
> |
for (int i = 0; i < SIZE; i++) { |
291 |
> |
aa.set(i, one); |
292 |
> |
assertEquals(one, aa.getOpaque(i)); |
293 |
> |
aa.set(i, two); |
294 |
> |
assertEquals(two, aa.getOpaque(i)); |
295 |
> |
aa.set(i, m3); |
296 |
> |
assertEquals(m3, aa.getOpaque(i)); |
297 |
> |
} |
298 |
> |
} |
299 |
> |
|
300 |
> |
/** |
301 |
> |
* getAcquire returns the last value set |
302 |
> |
*/ |
303 |
> |
public void testGetAcquireSet() { |
304 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
305 |
> |
for (int i = 0; i < SIZE; i++) { |
306 |
> |
aa.set(i, one); |
307 |
> |
assertEquals(one, aa.getAcquire(i)); |
308 |
> |
aa.set(i, two); |
309 |
> |
assertEquals(two, aa.getAcquire(i)); |
310 |
> |
aa.set(i, m3); |
311 |
> |
assertEquals(m3, aa.getAcquire(i)); |
312 |
> |
} |
313 |
> |
} |
314 |
> |
|
315 |
> |
/** |
316 |
> |
* get returns the last value setPlain |
317 |
> |
*/ |
318 |
> |
public void testGetSetPlain() { |
319 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
320 |
> |
for (int i = 0; i < SIZE; i++) { |
321 |
> |
aa.setPlain(i, one); |
322 |
> |
assertEquals(one, aa.get(i)); |
323 |
> |
aa.setPlain(i, two); |
324 |
> |
assertEquals(two, aa.get(i)); |
325 |
> |
aa.setPlain(i, m3); |
326 |
> |
assertEquals(m3, aa.get(i)); |
327 |
> |
} |
328 |
> |
} |
329 |
> |
|
330 |
> |
/** |
331 |
> |
* get returns the last value setOpaque |
332 |
> |
*/ |
333 |
> |
public void testGetSetOpaque() { |
334 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
335 |
> |
for (int i = 0; i < SIZE; i++) { |
336 |
> |
aa.setOpaque(i, one); |
337 |
> |
assertEquals(one, aa.get(i)); |
338 |
> |
aa.setOpaque(i, two); |
339 |
> |
assertEquals(two, aa.get(i)); |
340 |
> |
aa.setOpaque(i, m3); |
341 |
> |
assertEquals(m3, aa.get(i)); |
342 |
> |
} |
343 |
> |
} |
344 |
> |
|
345 |
> |
/** |
346 |
> |
* get returns the last value setRelease |
347 |
> |
*/ |
348 |
> |
public void testGetSetRelease() { |
349 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
350 |
> |
for (int i = 0; i < SIZE; i++) { |
351 |
> |
aa.setRelease(i, one); |
352 |
> |
assertEquals(one, aa.get(i)); |
353 |
> |
aa.setRelease(i, two); |
354 |
> |
assertEquals(two, aa.get(i)); |
355 |
> |
aa.setRelease(i, m3); |
356 |
> |
assertEquals(m3, aa.get(i)); |
357 |
> |
} |
358 |
> |
} |
359 |
> |
|
360 |
> |
/** |
361 |
> |
* compareAndExchange succeeds in changing value if equal to |
362 |
> |
* expected else fails |
363 |
> |
*/ |
364 |
> |
public void testCompareAndExchange() { |
365 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
366 |
> |
for (int i = 0; i < SIZE; i++) { |
367 |
> |
aa.set(i, one); |
368 |
> |
assertEquals(one, aa.compareAndExchange(i, one, two)); |
369 |
> |
assertEquals(two, aa.compareAndExchange(i, two, m4)); |
370 |
> |
assertEquals(m4, aa.get(i)); |
371 |
> |
assertEquals(m4, aa.compareAndExchange(i,m5, seven)); |
372 |
> |
assertEquals(m4, aa.get(i)); |
373 |
> |
assertEquals(m4, aa.compareAndExchange(i, m4, seven)); |
374 |
> |
assertEquals(seven, aa.get(i)); |
375 |
> |
} |
376 |
> |
} |
377 |
> |
|
378 |
> |
/** |
379 |
> |
* compareAndExchangeAcquire succeeds in changing value if equal to |
380 |
> |
* expected else fails |
381 |
> |
*/ |
382 |
> |
public void testCompareAndExchangeAcquire() { |
383 |
> |
AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE); |
384 |
> |
for (int i = 0; i < SIZE; i++) { |
385 |
> |
aa.set(i, one); |
386 |
> |
assertEquals(one, aa.compareAndExchangeAcquire(i, one, two)); |
387 |
> |
assertEquals(two, aa.compareAndExchangeAcquire(i, two, m4)); |
388 |
> |
assertEquals(m4, aa.get(i)); |
389 |
> |
assertEquals(m4, aa.compareAndExchangeAcquire(i,m5, seven)); |
390 |
> |
assertEquals(m4, aa.get(i)); |
391 |
> |
assertEquals(m4, aa.compareAndExchangeAcquire(i, m4, seven)); |
392 |
> |
assertEquals(seven, aa.get(i)); |
393 |
> |
} |
394 |
> |
} |
395 |
> |
|
396 |
> |
/** |
397 |
> |
* 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); |
404 |
> |
assertEquals(one, aa.compareAndExchangeRelease(i, one, two)); |
405 |
> |
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)); |
409 |
> |
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 |
|
|