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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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* 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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*/ |
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public void testConstructor() { |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(0,ai.get(i)); |
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} |
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int[] a = { 17, 3, -42, 99, -7}; |
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AtomicIntegerArray ai = new AtomicIntegerArray(a); |
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assertEquals(a.length, ai.length()); |
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for (int i = 0; i < a.length; ++i) |
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for (int i = 0; i < a.length; ++i) |
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assertEquals(a[i], ai.get(i)); |
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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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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertEquals(1,ai.get(i)); |
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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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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.lazySet(i, 1); |
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assertEquals(1,ai.get(i)); |
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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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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertTrue(ai.compareAndSet(i, 1,2)); |
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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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* to expected |
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*/ |
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public void testWeakCompareAndSet() { |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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while(!ai.weakCompareAndSet(i, 1,2)); |
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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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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertEquals(1,ai.getAndSet(i,0)); |
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* getAndAdd returns previous value and adds given value |
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*/ |
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public void testGetAndAdd() { |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertEquals(1,ai.getAndAdd(i,2)); |
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* getAndDecrement returns previous value and decrements |
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*/ |
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public void testGetAndDecrement() { |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertEquals(1,ai.getAndDecrement(i)); |
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* getAndIncrement returns previous value and increments |
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*/ |
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public void testGetAndIncrement() { |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertEquals(1,ai.getAndIncrement(i)); |
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* addAndGet adds given value to current, and returns current value |
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*/ |
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public void testAddAndGet() { |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertEquals(3,ai.addAndGet(i,2)); |
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* decrementAndGet decrements and returns current value |
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*/ |
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public void testDecrementAndGet() { |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertEquals(0,ai.decrementAndGet(i)); |
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* incrementAndGet increments and returns current value |
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*/ |
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public void testIncrementAndGet() { |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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ai.set(i, 1); |
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assertEquals(2,ai.incrementAndGet(i)); |
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} |
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static final int COUNTDOWN = 100000; |
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class Counter implements Runnable { |
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final AtomicIntegerArray ai; |
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volatile int counts; |
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*/ |
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public void testCountingInMultipleThreads() { |
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try { |
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final AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) |
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final AtomicIntegerArray ai = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) |
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ai.set(i, COUNTDOWN); |
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Counter c1 = new Counter(ai); |
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Counter c2 = new Counter(ai); |
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* a deserialized serialized array holds same values |
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*/ |
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public void testSerialization() { |
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AtomicIntegerArray l = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) |
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AtomicIntegerArray l = new AtomicIntegerArray(SIZE); |
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for (int i = 0; i < SIZE; ++i) |
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l.set(i, -i); |
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try { |
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|
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/** |
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* toString returns current value. |
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*/ |
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*/ |
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public void testToString() { |
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int[] a = { 17, 3, -42, 99, -7}; |
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AtomicIntegerArray ai = new AtomicIntegerArray(a); |