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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/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.locks.*; |
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import java.util.concurrent.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.util.*; |
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import java.io.*; |
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|
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public class ReentrantLockTest extends TestCase { |
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static int HOLD_COUNT_TEST_LIMIT = 20; |
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|
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public class ReentrantLockTest 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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junit.textui.TestRunner.run(suite()); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(ReentrantLockTest.class); |
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return new TestSuite(ReentrantLockTest.class); |
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} |
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|
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/** |
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* A runnable calling lockInterruptibly |
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*/ |
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class InterruptibleLockRunnable extends CheckedRunnable { |
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final ReentrantLock lock; |
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InterruptibleLockRunnable(ReentrantLock l) { lock = l; } |
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public void realRun() throws InterruptedException { |
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lock.lockInterruptibly(); |
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} |
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} |
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|
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|
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/** |
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* A runnable calling lockInterruptibly that expects to be |
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* interrupted |
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*/ |
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class InterruptedLockRunnable extends CheckedInterruptedRunnable { |
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final ReentrantLock lock; |
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InterruptedLockRunnable(ReentrantLock l) { lock = l; } |
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public void realRun() throws InterruptedException { |
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lock.lockInterruptibly(); |
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} |
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} |
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|
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/** |
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* Subclass to expose protected methods |
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*/ |
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static class PublicReentrantLock extends ReentrantLock { |
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PublicReentrantLock() { super(); } |
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public Collection<Thread> getQueuedThreads() { |
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return super.getQueuedThreads(); |
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} |
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public Collection<Thread> getWaitingThreads(Condition c) { |
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return super.getWaitingThreads(c); |
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} |
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} |
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|
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/** |
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* Constructor sets given fairness |
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*/ |
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public void testConstructor() { |
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assertFalse(new ReentrantLock().isFair()); |
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assertFalse(new ReentrantLock(false).isFair()); |
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assertTrue(new ReentrantLock(true).isFair()); |
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} |
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|
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/** |
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* locking an unlocked lock succeeds |
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*/ |
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public void testLock() { |
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ReentrantLock rl = new ReentrantLock(); |
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rl.lock(); |
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assertTrue(rl.isLocked()); |
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rl.unlock(); |
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assertFalse(rl.isLocked()); |
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} |
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|
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/** |
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* locking an unlocked fair lock succeeds |
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*/ |
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public void testFairLock() { |
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ReentrantLock rl = new ReentrantLock(true); |
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rl.lock(); |
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assertTrue(rl.isLocked()); |
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rl.unlock(); |
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} |
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|
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/** |
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* Unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testUnlock_IllegalMonitorStateException() { |
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ReentrantLock rl = new ReentrantLock(); |
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try { |
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rl.unlock(); |
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shouldThrow(); |
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} catch (IllegalMonitorStateException success) {} |
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} |
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|
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/** |
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* tryLock on an unlocked lock succeeds |
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*/ |
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public void testTryLock() { |
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ReentrantLock rl = new ReentrantLock(); |
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assertTrue(rl.tryLock()); |
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assertTrue(rl.isLocked()); |
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rl.unlock(); |
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} |
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|
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|
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/** |
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* hasQueuedThreads reports whether there are waiting threads |
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*/ |
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public void testhasQueuedThreads() throws InterruptedException { |
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final ReentrantLock lock = new ReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertFalse(lock.hasQueuedThreads()); |
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lock.lock(); |
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t1.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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lock.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertFalse(lock.hasQueuedThreads()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* getQueueLength reports number of waiting threads |
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*/ |
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public void testGetQueueLength() throws InterruptedException { |
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final ReentrantLock lock = new ReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertEquals(0, lock.getQueueLength()); |
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lock.lock(); |
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t1.start(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(2, lock.getQueueLength()); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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lock.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(0, lock.getQueueLength()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* getQueueLength reports number of waiting threads |
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*/ |
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public void testGetQueueLength_fair() throws InterruptedException { |
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final ReentrantLock lock = new ReentrantLock(true); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertEquals(0, lock.getQueueLength()); |
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lock.lock(); |
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t1.start(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(2, lock.getQueueLength()); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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lock.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(0, lock.getQueueLength()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* hasQueuedThread(null) throws NPE |
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*/ |
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public void testHasQueuedThreadNPE() { |
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final ReentrantLock sync = new ReentrantLock(); |
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try { |
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sync.hasQueuedThread(null); |
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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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* hasQueuedThread reports whether a thread is queued. |
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*/ |
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public void testHasQueuedThread() throws InterruptedException { |
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final ReentrantLock sync = new ReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(sync)); |
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assertFalse(sync.hasQueuedThread(t1)); |
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assertFalse(sync.hasQueuedThread(t2)); |
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sync.lock(); |
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t1.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThread(t1)); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThread(t1)); |
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assertTrue(sync.hasQueuedThread(t2)); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertFalse(sync.hasQueuedThread(t1)); |
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assertTrue(sync.hasQueuedThread(t2)); |
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sync.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertFalse(sync.hasQueuedThread(t1)); |
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delay(SHORT_DELAY_MS); |
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assertFalse(sync.hasQueuedThread(t2)); |
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t1.join(); |
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t2.join(); |
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} |
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|
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private static long SHORT_DELAY_MS = 100; |
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private static long MEDIUM_DELAY_MS = 1000; |
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private static long LONG_DELAY_MS = 10000; |
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|
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/* |
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* Unlocks an unlocked lock, throws Illegal Monitor State |
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* |
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*/ |
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|
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public void testIllegalMonitorStateException(){ |
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ReentrantLock rl = new ReentrantLock(); |
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try{ |
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rl.unlock(); |
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fail("Should of thown Illegal Monitor State Exception"); |
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|
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}catch(IllegalMonitorStateException sucess){} |
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|
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|
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} |
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|
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/* |
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* makes a lock, locks it, tries to aquire the lock in another thread |
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* interrupts that thread and waits for an interrupted Exception to |
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* be thrown. |
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*/ |
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|
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public void testInterruptedException(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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lock.lockInterruptibly(); |
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fail("should throw"); |
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}catch(InterruptedException sucess){} |
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} |
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}); |
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t.start(); |
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t.interrupt(); |
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lock.unlock(); |
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} |
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|
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/* |
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* tests for interrupted exception on a timed wait |
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* |
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*/ |
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|
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|
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public void testInterruptedException2(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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lock.tryLock(1000,TimeUnit.MILLISECONDS); |
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fail("should throw"); |
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}catch(InterruptedException sucess){} |
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} |
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}); |
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t.start(); |
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t.interrupt(); |
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|
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/** |
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* getQueuedThreads includes waiting threads |
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*/ |
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public void testGetQueuedThreads() throws InterruptedException { |
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final PublicReentrantLock lock = new PublicReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertTrue(lock.getQueuedThreads().isEmpty()); |
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lock.lock(); |
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assertTrue(lock.getQueuedThreads().isEmpty()); |
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t1.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.getQueuedThreads().contains(t1)); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.getQueuedThreads().contains(t1)); |
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assertTrue(lock.getQueuedThreads().contains(t2)); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertFalse(lock.getQueuedThreads().contains(t1)); |
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assertTrue(lock.getQueuedThreads().contains(t2)); |
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lock.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.getQueuedThreads().isEmpty()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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|
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|
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/** |
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* timed tryLock is interruptible. |
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*/ |
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public void testInterruptedException2() throws InterruptedException { |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new CheckedInterruptedRunnable() { |
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public void realRun() throws InterruptedException { |
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lock.tryLock(MEDIUM_DELAY_MS,MILLISECONDS); |
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}}); |
269 |
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|
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t.start(); |
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delay(SHORT_DELAY_MS); |
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t.interrupt(); |
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t.join(); |
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} |
275 |
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|
276 |
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|
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/** |
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* TryLock on a locked lock fails |
279 |
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*/ |
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public void testTryLockWhenLocked() throws InterruptedException { |
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final ReentrantLock lock = new ReentrantLock(); |
282 |
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lock.lock(); |
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Thread t = new Thread(new CheckedRunnable() { |
284 |
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public void realRun() { |
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assertFalse(lock.tryLock()); |
286 |
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}}); |
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|
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t.start(); |
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t.join(); |
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lock.unlock(); |
291 |
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} |
292 |
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|
293 |
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/** |
294 |
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* Timed tryLock on a locked lock times out |
295 |
> |
*/ |
296 |
> |
public void testTryLock_Timeout() throws InterruptedException { |
297 |
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final ReentrantLock lock = new ReentrantLock(); |
298 |
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lock.lock(); |
299 |
> |
Thread t = new Thread(new CheckedRunnable() { |
300 |
> |
public void realRun() throws InterruptedException { |
301 |
> |
assertFalse(lock.tryLock(1, MILLISECONDS)); |
302 |
> |
}}); |
303 |
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|
304 |
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t.start(); |
305 |
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t.join(); |
306 |
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lock.unlock(); |
307 |
> |
} |
308 |
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|
309 |
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/** |
310 |
> |
* getHoldCount returns number of recursive holds |
311 |
> |
*/ |
312 |
|
public void testGetHoldCount() { |
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ReentrantLock lock = new ReentrantLock(); |
314 |
< |
for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) { |
315 |
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lock.lock(); |
316 |
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assertEquals(i,lock.getHoldCount()); |
317 |
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} |
318 |
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for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) { |
319 |
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lock.unlock(); |
320 |
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assertEquals(i-1,lock.getHoldCount()); |
321 |
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} |
322 |
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} |
323 |
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|
324 |
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|
325 |
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|
326 |
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|
327 |
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public void testIsLocked() { |
328 |
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final ReentrantLock lock = new ReentrantLock(); |
329 |
< |
lock.lock(); |
330 |
< |
assertTrue(lock.isLocked()); |
331 |
< |
lock.unlock(); |
332 |
< |
assertFalse(lock.isLocked()); |
333 |
< |
Thread t = new Thread(new Runnable() { |
334 |
< |
public void run() { |
335 |
< |
lock.lock(); |
336 |
< |
try { |
337 |
< |
Thread.sleep(SHORT_DELAY_MS * 2); |
338 |
< |
} |
339 |
< |
catch(Exception e) {} |
340 |
< |
lock.unlock(); |
341 |
< |
} |
342 |
< |
}); |
343 |
< |
try{ |
344 |
< |
t.start(); |
345 |
< |
Thread.sleep(SHORT_DELAY_MS); |
346 |
< |
assertTrue(lock.isLocked()); |
347 |
< |
t.join(); |
348 |
< |
assertFalse(lock.isLocked()); |
349 |
< |
} catch(Exception e){ |
350 |
< |
fail("unexpected exception"); |
351 |
< |
} |
352 |
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|
353 |
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} |
354 |
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|
355 |
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/* |
356 |
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* current thread locks interruptibly the thread |
357 |
< |
* another thread tries to aquire the lock and blocks |
358 |
< |
* on the call. interrupt the attempted aquireLock |
359 |
< |
* assert that the first lock() call actually locked the lock |
360 |
< |
* assert that the current thread is the one holding the lock |
361 |
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*/ |
362 |
< |
|
363 |
< |
public void testLockedInterruptibly() { |
364 |
< |
final ReentrantLock lock = new ReentrantLock(); |
365 |
< |
try {lock.lockInterruptibly();} catch(Exception e) {} |
366 |
< |
Thread t = new Thread(new Runnable() { |
367 |
< |
public void run() { |
368 |
< |
try { |
369 |
< |
lock.lockInterruptibly(); |
370 |
< |
fail("Failed to generate an Interrupted Exception"); |
371 |
< |
} |
372 |
< |
catch(InterruptedException e) {} |
373 |
< |
} |
374 |
< |
}); |
375 |
< |
t.start(); |
376 |
< |
t.interrupt(); |
377 |
< |
assertTrue(lock.isLocked()); |
378 |
< |
assertTrue(lock.isHeldByCurrentThread()); |
313 |
> |
ReentrantLock lock = new ReentrantLock(); |
314 |
> |
for (int i = 1; i <= SIZE; i++) { |
315 |
> |
lock.lock(); |
316 |
> |
assertEquals(i, lock.getHoldCount()); |
317 |
> |
} |
318 |
> |
for (int i = SIZE; i > 0; i--) { |
319 |
> |
lock.unlock(); |
320 |
> |
assertEquals(i-1, lock.getHoldCount()); |
321 |
> |
} |
322 |
> |
} |
323 |
> |
|
324 |
> |
|
325 |
> |
/** |
326 |
> |
* isLocked is true when locked and false when not |
327 |
> |
*/ |
328 |
> |
public void testIsLocked() throws InterruptedException { |
329 |
> |
final ReentrantLock lock = new ReentrantLock(); |
330 |
> |
lock.lock(); |
331 |
> |
assertTrue(lock.isLocked()); |
332 |
> |
lock.unlock(); |
333 |
> |
assertFalse(lock.isLocked()); |
334 |
> |
Thread t = new Thread(new CheckedRunnable() { |
335 |
> |
public void realRun() throws InterruptedException { |
336 |
> |
lock.lock(); |
337 |
> |
delay(SMALL_DELAY_MS); |
338 |
> |
lock.unlock(); |
339 |
> |
}}); |
340 |
> |
|
341 |
> |
t.start(); |
342 |
> |
delay(SHORT_DELAY_MS); |
343 |
> |
assertTrue(lock.isLocked()); |
344 |
> |
t.join(); |
345 |
> |
assertFalse(lock.isLocked()); |
346 |
> |
} |
347 |
> |
|
348 |
> |
|
349 |
> |
/** |
350 |
> |
* lockInterruptibly is interruptible. |
351 |
> |
*/ |
352 |
> |
public void testLockInterruptibly1() throws InterruptedException { |
353 |
> |
final ReentrantLock lock = new ReentrantLock(); |
354 |
> |
lock.lock(); |
355 |
> |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
356 |
> |
t.start(); |
357 |
> |
delay(SHORT_DELAY_MS); |
358 |
> |
t.interrupt(); |
359 |
> |
delay(SHORT_DELAY_MS); |
360 |
> |
lock.unlock(); |
361 |
> |
t.join(); |
362 |
> |
} |
363 |
> |
|
364 |
> |
/** |
365 |
> |
* lockInterruptibly succeeds when unlocked, else is interruptible |
366 |
> |
*/ |
367 |
> |
public void testLockInterruptibly2() throws InterruptedException { |
368 |
> |
final ReentrantLock lock = new ReentrantLock(); |
369 |
> |
lock.lockInterruptibly(); |
370 |
> |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
371 |
> |
t.start(); |
372 |
> |
delay(SHORT_DELAY_MS); |
373 |
> |
t.interrupt(); |
374 |
> |
assertTrue(lock.isLocked()); |
375 |
> |
assertTrue(lock.isHeldByCurrentThread()); |
376 |
> |
t.join(); |
377 |
> |
} |
378 |
> |
|
379 |
> |
/** |
380 |
> |
* Calling await without holding lock throws IllegalMonitorStateException |
381 |
> |
*/ |
382 |
> |
public void testAwait_IllegalMonitor() throws InterruptedException { |
383 |
> |
final ReentrantLock lock = new ReentrantLock(); |
384 |
> |
final Condition c = lock.newCondition(); |
385 |
> |
try { |
386 |
> |
c.await(); |
387 |
> |
shouldThrow(); |
388 |
> |
} catch (IllegalMonitorStateException success) {} |
389 |
> |
} |
390 |
> |
|
391 |
> |
/** |
392 |
> |
* Calling signal without holding lock throws IllegalMonitorStateException |
393 |
> |
*/ |
394 |
> |
public void testSignal_IllegalMonitor() { |
395 |
> |
final ReentrantLock lock = new ReentrantLock(); |
396 |
> |
final Condition c = lock.newCondition(); |
397 |
> |
try { |
398 |
> |
c.signal(); |
399 |
> |
shouldThrow(); |
400 |
> |
} catch (IllegalMonitorStateException success) {} |
401 |
> |
} |
402 |
> |
|
403 |
> |
/** |
404 |
> |
* awaitNanos without a signal times out |
405 |
> |
*/ |
406 |
> |
public void testAwaitNanos_Timeout() throws InterruptedException { |
407 |
> |
final ReentrantLock lock = new ReentrantLock(); |
408 |
> |
final Condition c = lock.newCondition(); |
409 |
> |
lock.lock(); |
410 |
> |
long t = c.awaitNanos(100); |
411 |
> |
assertTrue(t <= 0); |
412 |
> |
lock.unlock(); |
413 |
> |
} |
414 |
> |
|
415 |
> |
/** |
416 |
> |
* timed await without a signal times out |
417 |
> |
*/ |
418 |
> |
public void testAwait_Timeout() throws InterruptedException { |
419 |
> |
final ReentrantLock lock = new ReentrantLock(); |
420 |
> |
final Condition c = lock.newCondition(); |
421 |
> |
lock.lock(); |
422 |
> |
assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS)); |
423 |
> |
lock.unlock(); |
424 |
> |
} |
425 |
> |
|
426 |
> |
/** |
427 |
> |
* awaitUntil without a signal times out |
428 |
> |
*/ |
429 |
> |
public void testAwaitUntil_Timeout() throws InterruptedException { |
430 |
> |
final ReentrantLock lock = new ReentrantLock(); |
431 |
> |
final Condition c = lock.newCondition(); |
432 |
> |
lock.lock(); |
433 |
> |
java.util.Date d = new java.util.Date(); |
434 |
> |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
435 |
> |
lock.unlock(); |
436 |
> |
} |
437 |
> |
|
438 |
> |
/** |
439 |
> |
* await returns when signalled |
440 |
> |
*/ |
441 |
> |
public void testAwait() throws InterruptedException { |
442 |
> |
final ReentrantLock lock = new ReentrantLock(); |
443 |
> |
final Condition c = lock.newCondition(); |
444 |
> |
Thread t = new Thread(new CheckedRunnable() { |
445 |
> |
public void realRun() throws InterruptedException { |
446 |
> |
lock.lock(); |
447 |
> |
c.await(); |
448 |
> |
lock.unlock(); |
449 |
> |
}}); |
450 |
> |
|
451 |
> |
t.start(); |
452 |
> |
delay(SHORT_DELAY_MS); |
453 |
> |
lock.lock(); |
454 |
> |
c.signal(); |
455 |
> |
lock.unlock(); |
456 |
> |
t.join(SHORT_DELAY_MS); |
457 |
> |
assertFalse(t.isAlive()); |
458 |
> |
} |
459 |
> |
|
460 |
> |
/** |
461 |
> |
* hasWaiters throws NPE if null |
462 |
> |
*/ |
463 |
> |
public void testHasWaitersNPE() { |
464 |
> |
final ReentrantLock lock = new ReentrantLock(); |
465 |
> |
try { |
466 |
> |
lock.hasWaiters(null); |
467 |
> |
shouldThrow(); |
468 |
> |
} catch (NullPointerException success) {} |
469 |
> |
} |
470 |
> |
|
471 |
> |
/** |
472 |
> |
* getWaitQueueLength throws NPE if null |
473 |
> |
*/ |
474 |
> |
public void testGetWaitQueueLengthNPE() { |
475 |
> |
final ReentrantLock lock = new ReentrantLock(); |
476 |
> |
try { |
477 |
> |
lock.getWaitQueueLength(null); |
478 |
> |
shouldThrow(); |
479 |
> |
} catch (NullPointerException success) {} |
480 |
> |
} |
481 |
> |
|
482 |
> |
|
483 |
> |
/** |
484 |
> |
* getWaitingThreads throws NPE if null |
485 |
> |
*/ |
486 |
> |
public void testGetWaitingThreadsNPE() { |
487 |
> |
final PublicReentrantLock lock = new PublicReentrantLock(); |
488 |
> |
try { |
489 |
> |
lock.getWaitingThreads(null); |
490 |
> |
shouldThrow(); |
491 |
> |
} catch (NullPointerException success) {} |
492 |
> |
} |
493 |
> |
|
494 |
> |
|
495 |
> |
/** |
496 |
> |
* hasWaiters throws IAE if not owned |
497 |
> |
*/ |
498 |
> |
public void testHasWaitersIAE() { |
499 |
> |
final ReentrantLock lock = new ReentrantLock(); |
500 |
> |
final Condition c = lock.newCondition(); |
501 |
> |
final ReentrantLock lock2 = new ReentrantLock(); |
502 |
> |
try { |
503 |
> |
lock2.hasWaiters(c); |
504 |
> |
shouldThrow(); |
505 |
> |
} catch (IllegalArgumentException success) {} |
506 |
> |
} |
507 |
> |
|
508 |
> |
/** |
509 |
> |
* hasWaiters throws IMSE if not locked |
510 |
> |
*/ |
511 |
> |
public void testHasWaitersIMSE() { |
512 |
> |
final ReentrantLock lock = new ReentrantLock(); |
513 |
> |
final Condition c = lock.newCondition(); |
514 |
> |
try { |
515 |
> |
lock.hasWaiters(c); |
516 |
> |
shouldThrow(); |
517 |
> |
} catch (IllegalMonitorStateException success) {} |
518 |
> |
} |
519 |
> |
|
520 |
> |
|
521 |
> |
/** |
522 |
> |
* getWaitQueueLength throws IAE if not owned |
523 |
> |
*/ |
524 |
> |
public void testGetWaitQueueLengthIAE() { |
525 |
> |
final ReentrantLock lock = new ReentrantLock(); |
526 |
> |
final Condition c = lock.newCondition(); |
527 |
> |
final ReentrantLock lock2 = new ReentrantLock(); |
528 |
> |
try { |
529 |
> |
lock2.getWaitQueueLength(c); |
530 |
> |
shouldThrow(); |
531 |
> |
} catch (IllegalArgumentException success) {} |
532 |
> |
} |
533 |
> |
|
534 |
> |
/** |
535 |
> |
* getWaitQueueLength throws IMSE if not locked |
536 |
> |
*/ |
537 |
> |
public void testGetWaitQueueLengthIMSE() { |
538 |
> |
final ReentrantLock lock = new ReentrantLock(); |
539 |
> |
final Condition c = lock.newCondition(); |
540 |
> |
try { |
541 |
> |
lock.getWaitQueueLength(c); |
542 |
> |
shouldThrow(); |
543 |
> |
} catch (IllegalMonitorStateException success) {} |
544 |
> |
} |
545 |
> |
|
546 |
> |
|
547 |
> |
/** |
548 |
> |
* getWaitingThreads throws IAE if not owned |
549 |
> |
*/ |
550 |
> |
public void testGetWaitingThreadsIAE() { |
551 |
> |
final PublicReentrantLock lock = new PublicReentrantLock(); |
552 |
> |
final Condition c = lock.newCondition(); |
553 |
> |
final PublicReentrantLock lock2 = new PublicReentrantLock(); |
554 |
> |
try { |
555 |
> |
lock2.getWaitingThreads(c); |
556 |
> |
shouldThrow(); |
557 |
> |
} catch (IllegalArgumentException success) {} |
558 |
> |
} |
559 |
> |
|
560 |
> |
/** |
561 |
> |
* getWaitingThreads throws IMSE if not locked |
562 |
> |
*/ |
563 |
> |
public void testGetWaitingThreadsIMSE() { |
564 |
> |
final PublicReentrantLock lock = new PublicReentrantLock(); |
565 |
> |
final Condition c = lock.newCondition(); |
566 |
> |
try { |
567 |
> |
lock.getWaitingThreads(c); |
568 |
> |
shouldThrow(); |
569 |
> |
} catch (IllegalMonitorStateException success) {} |
570 |
> |
} |
571 |
> |
|
572 |
> |
|
573 |
> |
/** |
574 |
> |
* hasWaiters returns true when a thread is waiting, else false |
575 |
> |
*/ |
576 |
> |
public void testHasWaiters() throws InterruptedException { |
577 |
> |
final ReentrantLock lock = new ReentrantLock(); |
578 |
> |
final Condition c = lock.newCondition(); |
579 |
> |
Thread t = new Thread(new CheckedRunnable() { |
580 |
> |
public void realRun() throws InterruptedException { |
581 |
> |
lock.lock(); |
582 |
> |
assertFalse(lock.hasWaiters(c)); |
583 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
584 |
> |
c.await(); |
585 |
> |
lock.unlock(); |
586 |
> |
}}); |
587 |
> |
|
588 |
> |
t.start(); |
589 |
> |
delay(SHORT_DELAY_MS); |
590 |
> |
lock.lock(); |
591 |
> |
assertTrue(lock.hasWaiters(c)); |
592 |
> |
assertEquals(1, lock.getWaitQueueLength(c)); |
593 |
> |
c.signal(); |
594 |
> |
lock.unlock(); |
595 |
> |
delay(SHORT_DELAY_MS); |
596 |
> |
lock.lock(); |
597 |
> |
assertFalse(lock.hasWaiters(c)); |
598 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
599 |
> |
lock.unlock(); |
600 |
> |
t.join(SHORT_DELAY_MS); |
601 |
> |
assertFalse(t.isAlive()); |
602 |
> |
} |
603 |
> |
|
604 |
> |
/** |
605 |
> |
* getWaitQueueLength returns number of waiting threads |
606 |
> |
*/ |
607 |
> |
public void testGetWaitQueueLength() throws InterruptedException { |
608 |
> |
final ReentrantLock lock = new ReentrantLock(); |
609 |
> |
final Condition c = lock.newCondition(); |
610 |
> |
Thread t1 = new Thread(new CheckedRunnable() { |
611 |
> |
public void realRun() throws InterruptedException { |
612 |
> |
lock.lock(); |
613 |
> |
assertFalse(lock.hasWaiters(c)); |
614 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
615 |
> |
c.await(); |
616 |
> |
lock.unlock(); |
617 |
> |
}}); |
618 |
> |
|
619 |
> |
Thread t2 = new Thread(new CheckedRunnable() { |
620 |
> |
public void realRun() throws InterruptedException { |
621 |
> |
lock.lock(); |
622 |
> |
assertTrue(lock.hasWaiters(c)); |
623 |
> |
assertEquals(1, lock.getWaitQueueLength(c)); |
624 |
> |
c.await(); |
625 |
> |
lock.unlock(); |
626 |
> |
}}); |
627 |
> |
|
628 |
> |
t1.start(); |
629 |
> |
delay(SHORT_DELAY_MS); |
630 |
> |
t2.start(); |
631 |
> |
delay(SHORT_DELAY_MS); |
632 |
> |
lock.lock(); |
633 |
> |
assertTrue(lock.hasWaiters(c)); |
634 |
> |
assertEquals(2, lock.getWaitQueueLength(c)); |
635 |
> |
c.signalAll(); |
636 |
> |
lock.unlock(); |
637 |
> |
delay(SHORT_DELAY_MS); |
638 |
> |
lock.lock(); |
639 |
> |
assertFalse(lock.hasWaiters(c)); |
640 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
641 |
> |
lock.unlock(); |
642 |
> |
t1.join(SHORT_DELAY_MS); |
643 |
> |
t2.join(SHORT_DELAY_MS); |
644 |
> |
assertFalse(t1.isAlive()); |
645 |
> |
assertFalse(t2.isAlive()); |
646 |
> |
} |
647 |
> |
|
648 |
> |
/** |
649 |
> |
* getWaitingThreads returns only and all waiting threads |
650 |
> |
*/ |
651 |
> |
public void testGetWaitingThreads() throws InterruptedException { |
652 |
> |
final PublicReentrantLock lock = new PublicReentrantLock(); |
653 |
> |
final Condition c = lock.newCondition(); |
654 |
> |
Thread t1 = new Thread(new CheckedRunnable() { |
655 |
> |
public void realRun() throws InterruptedException { |
656 |
> |
lock.lock(); |
657 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
658 |
> |
c.await(); |
659 |
> |
lock.unlock(); |
660 |
> |
}}); |
661 |
> |
|
662 |
> |
Thread t2 = new Thread(new CheckedRunnable() { |
663 |
> |
public void realRun() throws InterruptedException { |
664 |
> |
lock.lock(); |
665 |
> |
assertFalse(lock.getWaitingThreads(c).isEmpty()); |
666 |
> |
c.await(); |
667 |
> |
lock.unlock(); |
668 |
> |
}}); |
669 |
> |
|
670 |
> |
lock.lock(); |
671 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
672 |
> |
lock.unlock(); |
673 |
> |
t1.start(); |
674 |
> |
delay(SHORT_DELAY_MS); |
675 |
> |
t2.start(); |
676 |
> |
delay(SHORT_DELAY_MS); |
677 |
> |
lock.lock(); |
678 |
> |
assertTrue(lock.hasWaiters(c)); |
679 |
> |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
680 |
> |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
681 |
> |
c.signalAll(); |
682 |
> |
lock.unlock(); |
683 |
> |
delay(SHORT_DELAY_MS); |
684 |
> |
lock.lock(); |
685 |
> |
assertFalse(lock.hasWaiters(c)); |
686 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
687 |
> |
lock.unlock(); |
688 |
> |
t1.join(SHORT_DELAY_MS); |
689 |
> |
t2.join(SHORT_DELAY_MS); |
690 |
> |
assertFalse(t1.isAlive()); |
691 |
> |
assertFalse(t2.isAlive()); |
692 |
> |
} |
693 |
> |
|
694 |
> |
/** A helper class for uninterruptible wait tests */ |
695 |
> |
class UninterruptibleThread extends Thread { |
696 |
> |
private ReentrantLock lock; |
697 |
> |
private Condition c; |
698 |
> |
|
699 |
> |
public volatile boolean canAwake = false; |
700 |
> |
public volatile boolean interrupted = false; |
701 |
> |
public volatile boolean lockStarted = false; |
702 |
> |
|
703 |
> |
public UninterruptibleThread(ReentrantLock lock, Condition c) { |
704 |
> |
this.lock = lock; |
705 |
> |
this.c = c; |
706 |
> |
} |
707 |
> |
|
708 |
> |
public synchronized void run() { |
709 |
> |
lock.lock(); |
710 |
> |
lockStarted = true; |
711 |
> |
|
712 |
> |
while (!canAwake) { |
713 |
> |
c.awaitUninterruptibly(); |
714 |
> |
} |
715 |
> |
|
716 |
> |
interrupted = isInterrupted(); |
717 |
> |
lock.unlock(); |
718 |
> |
} |
719 |
> |
} |
720 |
> |
|
721 |
> |
/** |
722 |
> |
* awaitUninterruptibly doesn't abort on interrupt |
723 |
> |
*/ |
724 |
> |
public void testAwaitUninterruptibly() throws InterruptedException { |
725 |
> |
final ReentrantLock lock = new ReentrantLock(); |
726 |
> |
final Condition c = lock.newCondition(); |
727 |
> |
UninterruptibleThread thread = new UninterruptibleThread(lock, c); |
728 |
> |
|
729 |
> |
thread.start(); |
730 |
> |
|
731 |
> |
while (!thread.lockStarted) { |
732 |
> |
delay(100); |
733 |
> |
} |
734 |
> |
|
735 |
> |
lock.lock(); |
736 |
> |
try { |
737 |
> |
thread.interrupt(); |
738 |
> |
thread.canAwake = true; |
739 |
> |
c.signal(); |
740 |
> |
} finally { |
741 |
> |
lock.unlock(); |
742 |
> |
} |
743 |
> |
|
744 |
> |
thread.join(); |
745 |
> |
assertTrue(thread.interrupted); |
746 |
> |
assertFalse(thread.isAlive()); |
747 |
> |
} |
748 |
> |
|
749 |
> |
/** |
750 |
> |
* await is interruptible |
751 |
> |
*/ |
752 |
> |
public void testAwait_Interrupt() throws InterruptedException { |
753 |
> |
final ReentrantLock lock = new ReentrantLock(); |
754 |
> |
final Condition c = lock.newCondition(); |
755 |
> |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
756 |
> |
public void realRun() throws InterruptedException { |
757 |
> |
lock.lock(); |
758 |
> |
c.await(); |
759 |
> |
}}); |
760 |
> |
|
761 |
> |
t.start(); |
762 |
> |
delay(SHORT_DELAY_MS); |
763 |
> |
t.interrupt(); |
764 |
> |
t.join(SHORT_DELAY_MS); |
765 |
> |
assertFalse(t.isAlive()); |
766 |
> |
} |
767 |
> |
|
768 |
> |
/** |
769 |
> |
* awaitNanos is interruptible |
770 |
> |
*/ |
771 |
> |
public void testAwaitNanos_Interrupt() throws InterruptedException { |
772 |
> |
final ReentrantLock lock = new ReentrantLock(); |
773 |
> |
final Condition c = lock.newCondition(); |
774 |
> |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
775 |
> |
public void realRun() throws InterruptedException { |
776 |
> |
lock.lock(); |
777 |
> |
c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS)); |
778 |
> |
}}); |
779 |
> |
|
780 |
> |
t.start(); |
781 |
> |
delay(SHORT_DELAY_MS); |
782 |
> |
t.interrupt(); |
783 |
> |
t.join(SHORT_DELAY_MS); |
784 |
> |
assertFalse(t.isAlive()); |
785 |
> |
} |
786 |
> |
|
787 |
> |
/** |
788 |
> |
* awaitUntil is interruptible |
789 |
> |
*/ |
790 |
> |
public void testAwaitUntil_Interrupt() throws InterruptedException { |
791 |
> |
final ReentrantLock lock = new ReentrantLock(); |
792 |
> |
final Condition c = lock.newCondition(); |
793 |
> |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
794 |
> |
public void realRun() throws InterruptedException { |
795 |
> |
lock.lock(); |
796 |
> |
java.util.Date d = new java.util.Date(); |
797 |
> |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
798 |
> |
}}); |
799 |
> |
|
800 |
> |
t.start(); |
801 |
> |
delay(SHORT_DELAY_MS); |
802 |
> |
t.interrupt(); |
803 |
> |
t.join(SHORT_DELAY_MS); |
804 |
> |
assertFalse(t.isAlive()); |
805 |
> |
} |
806 |
> |
|
807 |
> |
/** |
808 |
> |
* signalAll wakes up all threads |
809 |
> |
*/ |
810 |
> |
public void testSignalAll() throws InterruptedException { |
811 |
> |
final ReentrantLock lock = new ReentrantLock(); |
812 |
> |
final Condition c = lock.newCondition(); |
813 |
> |
Thread t1 = new Thread(new CheckedRunnable() { |
814 |
> |
public void realRun() throws InterruptedException { |
815 |
> |
lock.lock(); |
816 |
> |
c.await(); |
817 |
> |
lock.unlock(); |
818 |
> |
}}); |
819 |
> |
|
820 |
> |
Thread t2 = new Thread(new CheckedRunnable() { |
821 |
> |
public void realRun() throws InterruptedException { |
822 |
> |
lock.lock(); |
823 |
> |
c.await(); |
824 |
> |
lock.unlock(); |
825 |
> |
}}); |
826 |
> |
|
827 |
> |
t1.start(); |
828 |
> |
t2.start(); |
829 |
> |
delay(SHORT_DELAY_MS); |
830 |
> |
lock.lock(); |
831 |
> |
c.signalAll(); |
832 |
> |
lock.unlock(); |
833 |
> |
t1.join(SHORT_DELAY_MS); |
834 |
> |
t2.join(SHORT_DELAY_MS); |
835 |
> |
assertFalse(t1.isAlive()); |
836 |
> |
assertFalse(t2.isAlive()); |
837 |
> |
} |
838 |
> |
|
839 |
> |
/** |
840 |
> |
* await after multiple reentrant locking preserves lock count |
841 |
> |
*/ |
842 |
> |
public void testAwaitLockCount() throws InterruptedException { |
843 |
> |
final ReentrantLock lock = new ReentrantLock(); |
844 |
> |
final Condition c = lock.newCondition(); |
845 |
> |
Thread t1 = new Thread(new CheckedRunnable() { |
846 |
> |
public void realRun() throws InterruptedException { |
847 |
> |
lock.lock(); |
848 |
> |
assertEquals(1, lock.getHoldCount()); |
849 |
> |
c.await(); |
850 |
> |
assertEquals(1, lock.getHoldCount()); |
851 |
> |
lock.unlock(); |
852 |
> |
}}); |
853 |
> |
|
854 |
> |
Thread t2 = new Thread(new CheckedRunnable() { |
855 |
> |
public void realRun() throws InterruptedException { |
856 |
> |
lock.lock(); |
857 |
> |
lock.lock(); |
858 |
> |
assertEquals(2, lock.getHoldCount()); |
859 |
> |
c.await(); |
860 |
> |
assertEquals(2, lock.getHoldCount()); |
861 |
> |
lock.unlock(); |
862 |
> |
lock.unlock(); |
863 |
> |
}}); |
864 |
> |
|
865 |
> |
t1.start(); |
866 |
> |
t2.start(); |
867 |
> |
delay(SHORT_DELAY_MS); |
868 |
> |
lock.lock(); |
869 |
> |
c.signalAll(); |
870 |
> |
lock.unlock(); |
871 |
> |
t1.join(SHORT_DELAY_MS); |
872 |
> |
t2.join(SHORT_DELAY_MS); |
873 |
> |
assertFalse(t1.isAlive()); |
874 |
> |
assertFalse(t2.isAlive()); |
875 |
> |
} |
876 |
> |
|
877 |
> |
/** |
878 |
> |
* A serialized lock deserializes as unlocked |
879 |
> |
*/ |
880 |
> |
public void testSerialization() throws Exception { |
881 |
> |
ReentrantLock l = new ReentrantLock(); |
882 |
> |
l.lock(); |
883 |
> |
l.unlock(); |
884 |
> |
|
885 |
> |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
886 |
> |
ObjectOutputStream out = |
887 |
> |
new ObjectOutputStream(new BufferedOutputStream(bout)); |
888 |
> |
out.writeObject(l); |
889 |
> |
out.close(); |
890 |
> |
|
891 |
> |
ByteArrayInputStream bin = |
892 |
> |
new ByteArrayInputStream(bout.toByteArray()); |
893 |
> |
ObjectInputStream in = |
894 |
> |
new ObjectInputStream(new BufferedInputStream(bin)); |
895 |
> |
ReentrantLock r = (ReentrantLock) in.readObject(); |
896 |
> |
r.lock(); |
897 |
> |
r.unlock(); |
898 |
> |
} |
899 |
> |
|
900 |
> |
/** |
901 |
> |
* toString indicates current lock state |
902 |
> |
*/ |
903 |
> |
public void testToString() { |
904 |
> |
ReentrantLock lock = new ReentrantLock(); |
905 |
> |
String us = lock.toString(); |
906 |
> |
assertTrue(us.indexOf("Unlocked") >= 0); |
907 |
> |
lock.lock(); |
908 |
> |
String ls = lock.toString(); |
909 |
> |
assertTrue(ls.indexOf("Locked") >= 0); |
910 |
|
} |
155 |
– |
|
911 |
|
|
912 |
|
} |