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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 java.util.concurrent.atomic.*; |
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} |
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/** |
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* Contruction with non-existent field throws RuntimeException |
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* Construction with non-existent field throws RuntimeException |
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*/ |
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public void testConstructor(){ |
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try{ |
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* get returns the last value set or assigned |
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*/ |
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public void testGetSet(){ |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
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try { |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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} catch (RuntimeException ok) { |
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return; |
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} |
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x = one; |
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assertEquals(one,a.get(this)); |
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a.set(this,two); |
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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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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
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try { |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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} catch (RuntimeException ok) { |
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return; |
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} |
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x = one; |
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assertTrue(a.compareAndSet(this,one,two)); |
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assertTrue(a.compareAndSet(this,two,m4)); |
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*/ |
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public void testCompareAndSetInMultipleThreads() { |
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x = one; |
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final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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final AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
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try { |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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} catch (RuntimeException ok) { |
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return; |
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} |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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* to expected |
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*/ |
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public void testWeakCompareAndSet(){ |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
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try { |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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} catch (RuntimeException ok) { |
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return; |
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} |
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x = one; |
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while(!a.weakCompareAndSet(this,one,two)); |
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while(!a.weakCompareAndSet(this,two,m4)); |
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* getAndSet returns previous value and sets to given value |
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*/ |
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public void testGetAndSet(){ |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest, Integer>a; |
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try { |
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a = AtomicReferenceFieldUpdater.newUpdater(AtomicReferenceFieldUpdaterTest.class, Integer.class, "x"); |
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} catch (RuntimeException ok) { |
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return; |
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} |
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x = one; |
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assertEquals(one,a.getAndSet(this, zero)); |
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assertEquals(zero,a.getAndSet(this,m10)); |