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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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* 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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import junit.framework.*; |
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import java.util.concurrent.atomic.*; |
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import java.io.*; |
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import java.util.concurrent.atomic.AtomicLong; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class AtomicLongTest extends JSR166TestCase { |
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public static void main (String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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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(AtomicLongTest.class); |
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*/ |
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public void testConstructor() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(1,ai.get()); |
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assertEquals(1, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testConstructor2() { |
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AtomicLong ai = new AtomicLong(); |
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assertEquals(0,ai.get()); |
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assertEquals(0, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testGetSet() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(1,ai.get()); |
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assertEquals(1, ai.get()); |
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ai.set(2); |
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assertEquals(2,ai.get()); |
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assertEquals(2, ai.get()); |
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ai.set(-3); |
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assertEquals(-3,ai.get()); |
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assertEquals(-3, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testGetLazySet() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(1,ai.get()); |
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assertEquals(1, ai.get()); |
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ai.lazySet(2); |
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assertEquals(2,ai.get()); |
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assertEquals(2, ai.get()); |
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ai.lazySet(-3); |
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assertEquals(-3,ai.get()); |
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assertEquals(-3, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testCompareAndSet() { |
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AtomicLong ai = new AtomicLong(1); |
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assertTrue(ai.compareAndSet(1,2)); |
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assertTrue(ai.compareAndSet(2,-4)); |
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assertEquals(-4,ai.get()); |
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assertFalse(ai.compareAndSet(-5,7)); |
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assertEquals(-4,ai.get()); |
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assertTrue(ai.compareAndSet(-4,7)); |
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assertEquals(7,ai.get()); |
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assertTrue(ai.compareAndSet(1, 2)); |
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assertTrue(ai.compareAndSet(2, -4)); |
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assertEquals(-4, ai.get()); |
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assertFalse(ai.compareAndSet(-5, 7)); |
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assertEquals(-4, ai.get()); |
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assertTrue(ai.compareAndSet(-4, 7)); |
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assertEquals(7, ai.get()); |
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} |
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/** |
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assertTrue(ai.compareAndSet(1, 2)); |
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t.join(LONG_DELAY_MS); |
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assertFalse(t.isAlive()); |
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assertEquals(ai.get(), 3); |
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assertEquals(3, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testWeakCompareAndSet() { |
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AtomicLong ai = new AtomicLong(1); |
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while (!ai.weakCompareAndSet(1,2)); |
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while (!ai.weakCompareAndSet(2,-4)); |
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assertEquals(-4,ai.get()); |
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while (!ai.weakCompareAndSet(-4,7)); |
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assertEquals(7,ai.get()); |
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do {} while (!ai.weakCompareAndSet(1, 2)); |
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do {} while (!ai.weakCompareAndSet(2, -4)); |
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assertEquals(-4, ai.get()); |
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do {} while (!ai.weakCompareAndSet(-4, 7)); |
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assertEquals(7, ai.get()); |
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} |
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/** |
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*/ |
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public void testGetAndSet() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(1,ai.getAndSet(0)); |
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assertEquals(0,ai.getAndSet(-10)); |
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assertEquals(-10,ai.getAndSet(1)); |
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assertEquals(1, ai.getAndSet(0)); |
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assertEquals(0, ai.getAndSet(-10)); |
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assertEquals(-10, ai.getAndSet(1)); |
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} |
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/** |
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*/ |
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public void testGetAndAdd() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(1,ai.getAndAdd(2)); |
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assertEquals(3,ai.get()); |
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assertEquals(3,ai.getAndAdd(-4)); |
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assertEquals(-1,ai.get()); |
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assertEquals(1, ai.getAndAdd(2)); |
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assertEquals(3, ai.get()); |
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assertEquals(3, ai.getAndAdd(-4)); |
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assertEquals(-1, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testGetAndDecrement() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(1,ai.getAndDecrement()); |
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assertEquals(0,ai.getAndDecrement()); |
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assertEquals(-1,ai.getAndDecrement()); |
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assertEquals(1, ai.getAndDecrement()); |
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assertEquals(0, ai.getAndDecrement()); |
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assertEquals(-1, ai.getAndDecrement()); |
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} |
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/** |
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*/ |
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public void testGetAndIncrement() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(1,ai.getAndIncrement()); |
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assertEquals(2,ai.get()); |
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assertEquals(1, ai.getAndIncrement()); |
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assertEquals(2, ai.get()); |
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ai.set(-2); |
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assertEquals(-2,ai.getAndIncrement()); |
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assertEquals(-1,ai.getAndIncrement()); |
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assertEquals(0,ai.getAndIncrement()); |
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assertEquals(1,ai.get()); |
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assertEquals(-2, ai.getAndIncrement()); |
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assertEquals(-1, ai.getAndIncrement()); |
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assertEquals(0, ai.getAndIncrement()); |
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assertEquals(1, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testAddAndGet() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(3,ai.addAndGet(2)); |
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assertEquals(3,ai.get()); |
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assertEquals(-1,ai.addAndGet(-4)); |
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assertEquals(-1,ai.get()); |
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assertEquals(3, ai.addAndGet(2)); |
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assertEquals(3, ai.get()); |
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assertEquals(-1, ai.addAndGet(-4)); |
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assertEquals(-1, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testDecrementAndGet() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(0,ai.decrementAndGet()); |
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assertEquals(-1,ai.decrementAndGet()); |
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assertEquals(-2,ai.decrementAndGet()); |
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assertEquals(-2,ai.get()); |
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assertEquals(0, ai.decrementAndGet()); |
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assertEquals(-1, ai.decrementAndGet()); |
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assertEquals(-2, ai.decrementAndGet()); |
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assertEquals(-2, ai.get()); |
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} |
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|
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/** |
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*/ |
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public void testIncrementAndGet() { |
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AtomicLong ai = new AtomicLong(1); |
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assertEquals(2,ai.incrementAndGet()); |
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assertEquals(2,ai.get()); |
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assertEquals(2, ai.incrementAndGet()); |
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assertEquals(2, ai.get()); |
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ai.set(-2); |
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assertEquals(-1,ai.incrementAndGet()); |
190 |
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assertEquals(0,ai.incrementAndGet()); |
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assertEquals(1,ai.incrementAndGet()); |
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assertEquals(1,ai.get()); |
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assertEquals(-1, ai.incrementAndGet()); |
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assertEquals(0, ai.incrementAndGet()); |
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assertEquals(1, ai.incrementAndGet()); |
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assertEquals(1, ai.get()); |
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} |
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|
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/** |
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* a deserialized serialized atomic holds same value |
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*/ |
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public void testSerialization() throws Exception { |
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AtomicLong l = new AtomicLong(); |
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|
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l.set(-22); |
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ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
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ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
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out.writeObject(l); |
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out.close(); |
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|
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ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
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ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
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AtomicLong r = (AtomicLong) in.readObject(); |
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assertEquals(l.get(), r.get()); |
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AtomicLong x = new AtomicLong(); |
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AtomicLong y = serialClone(x); |
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assertNotSame(x, y); |
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x.set(-22); |
203 |
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AtomicLong z = serialClone(x); |
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assertNotSame(y, z); |
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assertEquals(-22, x.get()); |
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assertEquals(0, y.get()); |
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assertEquals(-22, z.get()); |
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} |
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|
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/** |
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public void testToString() { |
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AtomicLong ai = new AtomicLong(); |
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assertEquals("0", ai.toString()); |
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for (long i : VALUES) { |
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ai.set(i); |
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assertEquals(ai.toString(), Long.toString(i)); |
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for (long x : VALUES) { |
217 |
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ai.set(x); |
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assertEquals(Long.toString(x), ai.toString()); |
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} |
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} |
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|
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assertEquals(0L, ai.longValue()); |
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for (long x : VALUES) { |
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ai.set(x); |
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assertEquals((long)x, ai.longValue()); |
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assertEquals(x, ai.longValue()); |
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} |
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} |
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|
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} |
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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 |
274 |
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*/ |
275 |
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public void testGetPlainSet() { |
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AtomicLong ai = new AtomicLong(1); |
277 |
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assertEquals(1, ai.getPlain()); |
278 |
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ai.set(2); |
279 |
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assertEquals(2, ai.getPlain()); |
280 |
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ai.set(-3); |
281 |
+ |
assertEquals(-3, ai.getPlain()); |
282 |
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} |
283 |
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|
284 |
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/** |
285 |
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* getOpaque returns the last value set |
286 |
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*/ |
287 |
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public void testGetOpaqueSet() { |
288 |
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AtomicLong ai = new AtomicLong(1); |
289 |
+ |
assertEquals(1, ai.getOpaque()); |
290 |
+ |
ai.set(2); |
291 |
+ |
assertEquals(2, ai.getOpaque()); |
292 |
+ |
ai.set(-3); |
293 |
+ |
assertEquals(-3, ai.getOpaque()); |
294 |
+ |
} |
295 |
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|
296 |
+ |
/** |
297 |
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* getAcquire returns the last value set |
298 |
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*/ |
299 |
+ |
public void testGetAcquireSet() { |
300 |
+ |
AtomicLong ai = new AtomicLong(1); |
301 |
+ |
assertEquals(1, ai.getAcquire()); |
302 |
+ |
ai.set(2); |
303 |
+ |
assertEquals(2, ai.getAcquire()); |
304 |
+ |
ai.set(-3); |
305 |
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assertEquals(-3, ai.getAcquire()); |
306 |
+ |
} |
307 |
+ |
|
308 |
+ |
/** |
309 |
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* get returns the last value setPlain |
310 |
+ |
*/ |
311 |
+ |
public void testGetSetPlain() { |
312 |
+ |
AtomicLong ai = new AtomicLong(1); |
313 |
+ |
assertEquals(1, ai.get()); |
314 |
+ |
ai.setPlain(2); |
315 |
+ |
assertEquals(2, ai.get()); |
316 |
+ |
ai.setPlain(-3); |
317 |
+ |
assertEquals(-3, ai.get()); |
318 |
+ |
} |
319 |
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|
320 |
+ |
/** |
321 |
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* get returns the last value setOpaque |
322 |
+ |
*/ |
323 |
+ |
public void testGetSetOpaque() { |
324 |
+ |
AtomicLong ai = new AtomicLong(1); |
325 |
+ |
assertEquals(1, ai.get()); |
326 |
+ |
ai.setOpaque(2); |
327 |
+ |
assertEquals(2, ai.get()); |
328 |
+ |
ai.setOpaque(-3); |
329 |
+ |
assertEquals(-3, ai.get()); |
330 |
+ |
} |
331 |
+ |
|
332 |
+ |
/** |
333 |
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* get returns the last value setRelease |
334 |
+ |
*/ |
335 |
+ |
public void testGetSetRelease() { |
336 |
+ |
AtomicLong ai = new AtomicLong(1); |
337 |
+ |
assertEquals(1, ai.get()); |
338 |
+ |
ai.setRelease(2); |
339 |
+ |
assertEquals(2, ai.get()); |
340 |
+ |
ai.setRelease(-3); |
341 |
+ |
assertEquals(-3, ai.get()); |
342 |
+ |
} |
343 |
+ |
|
344 |
+ |
/** |
345 |
+ |
* compareAndExchange succeeds in changing value if equal to |
346 |
+ |
* expected else fails |
347 |
+ |
*/ |
348 |
+ |
public void testCompareAndExchange() { |
349 |
+ |
AtomicLong ai = new AtomicLong(1); |
350 |
+ |
assertEquals(1, ai.compareAndExchange(1, 2)); |
351 |
+ |
assertEquals(2, ai.compareAndExchange(2, -4)); |
352 |
+ |
assertEquals(-4, ai.get()); |
353 |
+ |
assertEquals(-4, ai.compareAndExchange(-5, 7)); |
354 |
+ |
assertEquals(-4, ai.get()); |
355 |
+ |
assertEquals(-4, ai.compareAndExchange(-4, 7)); |
356 |
+ |
assertEquals(7, ai.get()); |
357 |
+ |
} |
358 |
+ |
|
359 |
+ |
/** |
360 |
+ |
* compareAndExchangeAcquire succeeds in changing value if equal to |
361 |
+ |
* expected else fails |
362 |
+ |
*/ |
363 |
+ |
public void testCompareAndExchangeAcquire() { |
364 |
+ |
AtomicLong ai = new AtomicLong(1); |
365 |
+ |
assertEquals(1, ai.compareAndExchangeAcquire(1, 2)); |
366 |
+ |
assertEquals(2, ai.compareAndExchangeAcquire(2, -4)); |
367 |
+ |
assertEquals(-4, ai.get()); |
368 |
+ |
assertEquals(-4, ai.compareAndExchangeAcquire(-5, 7)); |
369 |
+ |
assertEquals(-4, ai.get()); |
370 |
+ |
assertEquals(-4, ai.compareAndExchangeAcquire(-4, 7)); |
371 |
+ |
assertEquals(7, ai.get()); |
372 |
+ |
} |
373 |
+ |
|
374 |
+ |
/** |
375 |
+ |
* compareAndExchangeRelease succeeds in changing value if equal to |
376 |
+ |
* expected else fails |
377 |
+ |
*/ |
378 |
+ |
public void testCompareAndExchangeRelease() { |
379 |
+ |
AtomicLong ai = new AtomicLong(1); |
380 |
+ |
assertEquals(1, ai.compareAndExchangeRelease(1, 2)); |
381 |
+ |
assertEquals(2, ai.compareAndExchangeRelease(2, -4)); |
382 |
+ |
assertEquals(-4, ai.get()); |
383 |
+ |
assertEquals(-4, ai.compareAndExchangeRelease(-5, 7)); |
384 |
+ |
assertEquals(-4, ai.get()); |
385 |
+ |
assertEquals(-4, ai.compareAndExchangeRelease(-4, 7)); |
386 |
+ |
assertEquals(7, ai.get()); |
387 |
+ |
} |
388 |
+ |
|
389 |
+ |
/** |
390 |
+ |
* repeated weakCompareAndSetVolatile succeeds in changing value when equal |
391 |
+ |
* to expected |
392 |
+ |
*/ |
393 |
+ |
public void testWeakCompareAndSetVolatile() { |
394 |
+ |
AtomicLong ai = new AtomicLong(1); |
395 |
+ |
do {} while (!ai.weakCompareAndSetVolatile(1, 2)); |
396 |
+ |
do {} while (!ai.weakCompareAndSetVolatile(2, -4)); |
397 |
+ |
assertEquals(-4, ai.get()); |
398 |
+ |
do {} while (!ai.weakCompareAndSetVolatile(-4, 7)); |
399 |
+ |
assertEquals(7, ai.get()); |
400 |
+ |
} |
401 |
+ |
|
402 |
+ |
/** |
403 |
+ |
* repeated weakCompareAndSetAcquire succeeds in changing value when equal |
404 |
+ |
* to expected |
405 |
+ |
*/ |
406 |
+ |
public void testWeakCompareAndSetAcquire() { |
407 |
+ |
AtomicLong ai = new AtomicLong(1); |
408 |
+ |
do {} while (!ai.weakCompareAndSetAcquire(1, 2)); |
409 |
+ |
do {} while (!ai.weakCompareAndSetAcquire(2, -4)); |
410 |
+ |
assertEquals(-4, ai.get()); |
411 |
+ |
do {} while (!ai.weakCompareAndSetAcquire(-4, 7)); |
412 |
+ |
assertEquals(7, ai.get()); |
413 |
+ |
} |
414 |
+ |
|
415 |
+ |
/** |
416 |
+ |
* repeated weakCompareAndSetRelease succeeds in changing value when equal |
417 |
+ |
* to expected |
418 |
+ |
*/ |
419 |
+ |
public void testWeakCompareAndSetRelease() { |
420 |
+ |
AtomicLong ai = new AtomicLong(1); |
421 |
+ |
do {} while (!ai.weakCompareAndSetRelease(1, 2)); |
422 |
+ |
do {} while (!ai.weakCompareAndSetRelease(2, -4)); |
423 |
+ |
assertEquals(-4, ai.get()); |
424 |
+ |
do {} while (!ai.weakCompareAndSetRelease(-4, 7)); |
425 |
+ |
assertEquals(7, ai.get()); |
426 |
+ |
} |
427 |
+ |
|
428 |
|
} |