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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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*/ |
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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 java.util.*; |
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import java.io.*; |
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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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} |
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public static Test suite() { |
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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 |
24 |
*/ |
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class InterruptibleLockRunnable implements Runnable { |
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final ReentrantLock lock; |
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InterruptibleLockRunnable(ReentrantLock l) { lock = l; } |
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public void run() { |
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try { |
30 |
lock.lockInterruptibly(); |
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} catch(InterruptedException success){} |
32 |
} |
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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 implements Runnable { |
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final ReentrantLock lock; |
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InterruptedLockRunnable(ReentrantLock l) { lock = l; } |
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public void run() { |
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try { |
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lock.lockInterruptibly(); |
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threadShouldThrow(); |
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} catch(InterruptedException success){} |
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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 ConditionObject newCondition() { |
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return new PublicCondition(this); |
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} |
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|
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static class PublicCondition extends ReentrantLock.ConditionObject { |
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PublicCondition(PublicReentrantLock l) { super(l); } |
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public Collection<Thread> getWaitingThreads() { |
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return super.getWaitingThreads(); |
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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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* Constructor sets given fairness |
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*/ |
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public void testConstructor() { |
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ReentrantLock rl = new ReentrantLock(); |
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assertFalse(rl.isFair()); |
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ReentrantLock r2 = new ReentrantLock(true); |
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assertTrue(r2.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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} |
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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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|
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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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* getQueueLength reports number of waiting threads |
127 |
*/ |
128 |
public void testGetQueueLength() { |
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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)); |
132 |
try { |
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assertEquals(0, lock.getQueueLength()); |
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lock.lock(); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(2, lock.getQueueLength()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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lock.unlock(); |
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Thread.sleep(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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} catch(Exception e){ |
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unexpectedException(); |
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} |
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} |
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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() { |
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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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try { |
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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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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.getQueuedThreads().contains(t1)); |
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t2.start(); |
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Thread.sleep(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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Thread.sleep(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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Thread.sleep(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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} catch(Exception e){ |
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unexpectedException(); |
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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() { |
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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() { |
194 |
public void run() { |
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try { |
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lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS); |
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threadShouldThrow(); |
198 |
} catch(InterruptedException success){} |
199 |
} |
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}); |
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try { |
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t.start(); |
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t.interrupt(); |
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} catch(Exception e){ |
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unexpectedException(); |
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} |
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} |
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|
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|
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/** |
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* Trylock on a locked lock fails |
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*/ |
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public void testTryLockWhenLocked() { |
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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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threadAssertFalse(lock.tryLock()); |
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} |
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}); |
221 |
try { |
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t.start(); |
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t.join(); |
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lock.unlock(); |
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} catch(Exception e){ |
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unexpectedException(); |
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} |
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} |
229 |
|
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/** |
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* Timed trylock on a locked lock times out |
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*/ |
233 |
public void testTryLock_Timeout() { |
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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() { |
238 |
try { |
239 |
threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS)); |
240 |
} catch (Exception ex) { |
241 |
threadUnexpectedException(); |
242 |
} |
243 |
} |
244 |
}); |
245 |
try { |
246 |
t.start(); |
247 |
t.join(); |
248 |
lock.unlock(); |
249 |
} catch(Exception e){ |
250 |
unexpectedException(); |
251 |
} |
252 |
} |
253 |
|
254 |
/** |
255 |
* getHoldCount returns number of recursive holds |
256 |
*/ |
257 |
public void testGetHoldCount() { |
258 |
ReentrantLock lock = new ReentrantLock(); |
259 |
for(int i = 1; i <= SIZE; i++) { |
260 |
lock.lock(); |
261 |
assertEquals(i,lock.getHoldCount()); |
262 |
} |
263 |
for(int i = SIZE; i > 0; i--) { |
264 |
lock.unlock(); |
265 |
assertEquals(i-1,lock.getHoldCount()); |
266 |
} |
267 |
} |
268 |
|
269 |
|
270 |
/** |
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* isLocked is true when locked and false when not |
272 |
*/ |
273 |
public void testIsLocked() { |
274 |
final ReentrantLock lock = new ReentrantLock(); |
275 |
lock.lock(); |
276 |
assertTrue(lock.isLocked()); |
277 |
lock.unlock(); |
278 |
assertFalse(lock.isLocked()); |
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Thread t = new Thread(new Runnable() { |
280 |
public void run() { |
281 |
lock.lock(); |
282 |
try { |
283 |
Thread.sleep(SMALL_DELAY_MS); |
284 |
} |
285 |
catch(Exception e) { |
286 |
threadUnexpectedException(); |
287 |
} |
288 |
lock.unlock(); |
289 |
} |
290 |
}); |
291 |
try { |
292 |
t.start(); |
293 |
Thread.sleep(SHORT_DELAY_MS); |
294 |
assertTrue(lock.isLocked()); |
295 |
t.join(); |
296 |
assertFalse(lock.isLocked()); |
297 |
} catch(Exception e){ |
298 |
unexpectedException(); |
299 |
} |
300 |
} |
301 |
|
302 |
|
303 |
/** |
304 |
* lockInterruptibly is interruptible. |
305 |
*/ |
306 |
public void testLockInterruptibly1() { |
307 |
final ReentrantLock lock = new ReentrantLock(); |
308 |
lock.lock(); |
309 |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
310 |
try { |
311 |
t.start(); |
312 |
t.interrupt(); |
313 |
lock.unlock(); |
314 |
t.join(); |
315 |
} catch(Exception e){ |
316 |
unexpectedException(); |
317 |
} |
318 |
} |
319 |
|
320 |
/** |
321 |
* lockInterruptibly succeeds when unlocked, else is interruptible |
322 |
*/ |
323 |
public void testLockInterruptibly2() { |
324 |
final ReentrantLock lock = new ReentrantLock(); |
325 |
try { |
326 |
lock.lockInterruptibly(); |
327 |
} catch(Exception e) { |
328 |
unexpectedException(); |
329 |
} |
330 |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
331 |
try { |
332 |
t.start(); |
333 |
t.interrupt(); |
334 |
assertTrue(lock.isLocked()); |
335 |
assertTrue(lock.isHeldByCurrentThread()); |
336 |
t.join(); |
337 |
} catch(Exception e){ |
338 |
unexpectedException(); |
339 |
} |
340 |
} |
341 |
|
342 |
/** |
343 |
* Calling await without holding lock throws IllegalMonitorStateException |
344 |
*/ |
345 |
public void testAwait_IllegalMonitor() { |
346 |
final ReentrantLock lock = new ReentrantLock(); |
347 |
final Condition c = lock.newCondition(); |
348 |
try { |
349 |
c.await(); |
350 |
shouldThrow(); |
351 |
} |
352 |
catch (IllegalMonitorStateException success) { |
353 |
} |
354 |
catch (Exception ex) { |
355 |
unexpectedException(); |
356 |
} |
357 |
} |
358 |
|
359 |
/** |
360 |
* Calling signal without holding lock throws IllegalMonitorStateException |
361 |
*/ |
362 |
public void testSignal_IllegalMonitor() { |
363 |
final ReentrantLock lock = new ReentrantLock(); |
364 |
final Condition c = lock.newCondition(); |
365 |
try { |
366 |
c.signal(); |
367 |
shouldThrow(); |
368 |
} |
369 |
catch (IllegalMonitorStateException success) { |
370 |
} |
371 |
catch (Exception ex) { |
372 |
unexpectedException(); |
373 |
} |
374 |
} |
375 |
|
376 |
/** |
377 |
* awaitNanos without a signal times out |
378 |
*/ |
379 |
public void testAwaitNanos_Timeout() { |
380 |
final ReentrantLock lock = new ReentrantLock(); |
381 |
final Condition c = lock.newCondition(); |
382 |
try { |
383 |
lock.lock(); |
384 |
long t = c.awaitNanos(100); |
385 |
assertTrue(t <= 0); |
386 |
lock.unlock(); |
387 |
} |
388 |
catch (Exception ex) { |
389 |
unexpectedException(); |
390 |
} |
391 |
} |
392 |
|
393 |
/** |
394 |
* timed await without a signal times out |
395 |
*/ |
396 |
public void testAwait_Timeout() { |
397 |
final ReentrantLock lock = new ReentrantLock(); |
398 |
final Condition c = lock.newCondition(); |
399 |
try { |
400 |
lock.lock(); |
401 |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
402 |
lock.unlock(); |
403 |
} |
404 |
catch (Exception ex) { |
405 |
unexpectedException(); |
406 |
} |
407 |
} |
408 |
|
409 |
/** |
410 |
* awaitUntil without a signal times out |
411 |
*/ |
412 |
public void testAwaitUntil_Timeout() { |
413 |
final ReentrantLock lock = new ReentrantLock(); |
414 |
final Condition c = lock.newCondition(); |
415 |
try { |
416 |
lock.lock(); |
417 |
java.util.Date d = new java.util.Date(); |
418 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
419 |
lock.unlock(); |
420 |
} |
421 |
catch (Exception ex) { |
422 |
unexpectedException(); |
423 |
} |
424 |
} |
425 |
|
426 |
/** |
427 |
* await returns when signalled |
428 |
*/ |
429 |
public void testAwait() { |
430 |
final ReentrantLock lock = new ReentrantLock(); |
431 |
final ReentrantLock.ConditionObject c = lock.newCondition(); |
432 |
Thread t = new Thread(new Runnable() { |
433 |
public void run() { |
434 |
try { |
435 |
lock.lock(); |
436 |
c.await(); |
437 |
lock.unlock(); |
438 |
} |
439 |
catch(InterruptedException e) { |
440 |
threadUnexpectedException(); |
441 |
} |
442 |
} |
443 |
}); |
444 |
|
445 |
try { |
446 |
t.start(); |
447 |
Thread.sleep(SHORT_DELAY_MS); |
448 |
lock.lock(); |
449 |
c.signal(); |
450 |
lock.unlock(); |
451 |
t.join(SHORT_DELAY_MS); |
452 |
assertFalse(t.isAlive()); |
453 |
} |
454 |
catch (Exception ex) { |
455 |
unexpectedException(); |
456 |
} |
457 |
} |
458 |
|
459 |
/** |
460 |
* hasWaiters returns true when a thread is waiting, else false |
461 |
*/ |
462 |
public void testHasWaiters() { |
463 |
final ReentrantLock lock = new ReentrantLock(); |
464 |
final ReentrantLock.ConditionObject c = lock.newCondition(); |
465 |
Thread t = new Thread(new Runnable() { |
466 |
public void run() { |
467 |
try { |
468 |
lock.lock(); |
469 |
threadAssertFalse(c.hasWaiters()); |
470 |
threadAssertEquals(0, c.getWaitQueueLength()); |
471 |
c.await(); |
472 |
lock.unlock(); |
473 |
} |
474 |
catch(InterruptedException e) { |
475 |
threadUnexpectedException(); |
476 |
} |
477 |
} |
478 |
}); |
479 |
|
480 |
try { |
481 |
t.start(); |
482 |
Thread.sleep(SHORT_DELAY_MS); |
483 |
lock.lock(); |
484 |
assertTrue(c.hasWaiters()); |
485 |
assertEquals(1, c.getWaitQueueLength()); |
486 |
c.signal(); |
487 |
lock.unlock(); |
488 |
Thread.sleep(SHORT_DELAY_MS); |
489 |
lock.lock(); |
490 |
assertFalse(c.hasWaiters()); |
491 |
assertEquals(0, c.getWaitQueueLength()); |
492 |
lock.unlock(); |
493 |
t.join(SHORT_DELAY_MS); |
494 |
assertFalse(t.isAlive()); |
495 |
} |
496 |
catch (Exception ex) { |
497 |
unexpectedException(); |
498 |
} |
499 |
} |
500 |
|
501 |
/** |
502 |
* getWaitQueueLength returns number of waiting threads |
503 |
*/ |
504 |
public void testGetWaitQueueLength() { |
505 |
final ReentrantLock lock = new ReentrantLock(); |
506 |
final ReentrantLock.ConditionObject c = lock.newCondition(); |
507 |
Thread t1 = new Thread(new Runnable() { |
508 |
public void run() { |
509 |
try { |
510 |
lock.lock(); |
511 |
threadAssertFalse(c.hasWaiters()); |
512 |
threadAssertEquals(0, c.getWaitQueueLength()); |
513 |
c.await(); |
514 |
lock.unlock(); |
515 |
} |
516 |
catch(InterruptedException e) { |
517 |
threadUnexpectedException(); |
518 |
} |
519 |
} |
520 |
}); |
521 |
|
522 |
Thread t2 = new Thread(new Runnable() { |
523 |
public void run() { |
524 |
try { |
525 |
lock.lock(); |
526 |
threadAssertTrue(c.hasWaiters()); |
527 |
threadAssertEquals(1, c.getWaitQueueLength()); |
528 |
c.await(); |
529 |
lock.unlock(); |
530 |
} |
531 |
catch(InterruptedException e) { |
532 |
threadUnexpectedException(); |
533 |
} |
534 |
} |
535 |
}); |
536 |
|
537 |
try { |
538 |
t1.start(); |
539 |
Thread.sleep(SHORT_DELAY_MS); |
540 |
t2.start(); |
541 |
Thread.sleep(SHORT_DELAY_MS); |
542 |
lock.lock(); |
543 |
assertTrue(c.hasWaiters()); |
544 |
assertEquals(2, c.getWaitQueueLength()); |
545 |
c.signalAll(); |
546 |
lock.unlock(); |
547 |
Thread.sleep(SHORT_DELAY_MS); |
548 |
lock.lock(); |
549 |
assertFalse(c.hasWaiters()); |
550 |
assertEquals(0, c.getWaitQueueLength()); |
551 |
lock.unlock(); |
552 |
t1.join(SHORT_DELAY_MS); |
553 |
t2.join(SHORT_DELAY_MS); |
554 |
assertFalse(t1.isAlive()); |
555 |
assertFalse(t2.isAlive()); |
556 |
} |
557 |
catch (Exception ex) { |
558 |
unexpectedException(); |
559 |
} |
560 |
} |
561 |
|
562 |
/** |
563 |
* getWaitingThreads returns only and all waiting threads |
564 |
*/ |
565 |
public void testGetWaitingThreads() { |
566 |
final PublicReentrantLock lock = new PublicReentrantLock(); |
567 |
final PublicReentrantLock.PublicCondition c = (PublicReentrantLock.PublicCondition)lock.newCondition(); |
568 |
Thread t1 = new Thread(new Runnable() { |
569 |
public void run() { |
570 |
try { |
571 |
lock.lock(); |
572 |
threadAssertTrue(c.getWaitingThreads().isEmpty()); |
573 |
c.await(); |
574 |
lock.unlock(); |
575 |
} |
576 |
catch(InterruptedException e) { |
577 |
threadUnexpectedException(); |
578 |
} |
579 |
} |
580 |
}); |
581 |
|
582 |
Thread t2 = new Thread(new Runnable() { |
583 |
public void run() { |
584 |
try { |
585 |
lock.lock(); |
586 |
threadAssertFalse(c.getWaitingThreads().isEmpty()); |
587 |
c.await(); |
588 |
lock.unlock(); |
589 |
} |
590 |
catch(InterruptedException e) { |
591 |
threadUnexpectedException(); |
592 |
} |
593 |
} |
594 |
}); |
595 |
|
596 |
try { |
597 |
lock.lock(); |
598 |
assertTrue(c.getWaitingThreads().isEmpty()); |
599 |
lock.unlock(); |
600 |
t1.start(); |
601 |
Thread.sleep(SHORT_DELAY_MS); |
602 |
t2.start(); |
603 |
Thread.sleep(SHORT_DELAY_MS); |
604 |
lock.lock(); |
605 |
assertTrue(c.hasWaiters()); |
606 |
assertTrue(c.getWaitingThreads().contains(t1)); |
607 |
assertTrue(c.getWaitingThreads().contains(t2)); |
608 |
c.signalAll(); |
609 |
lock.unlock(); |
610 |
Thread.sleep(SHORT_DELAY_MS); |
611 |
lock.lock(); |
612 |
assertFalse(c.hasWaiters()); |
613 |
assertTrue(c.getWaitingThreads().isEmpty()); |
614 |
lock.unlock(); |
615 |
t1.join(SHORT_DELAY_MS); |
616 |
t2.join(SHORT_DELAY_MS); |
617 |
assertFalse(t1.isAlive()); |
618 |
assertFalse(t2.isAlive()); |
619 |
} |
620 |
catch (Exception ex) { |
621 |
unexpectedException(); |
622 |
} |
623 |
} |
624 |
|
625 |
/** |
626 |
* awaitUninterruptibly doesn't abort on interrupt |
627 |
*/ |
628 |
public void testAwaitUninterruptibly() { |
629 |
final ReentrantLock lock = new ReentrantLock(); |
630 |
final Condition c = lock.newCondition(); |
631 |
Thread t = new Thread(new Runnable() { |
632 |
public void run() { |
633 |
lock.lock(); |
634 |
c.awaitUninterruptibly(); |
635 |
lock.unlock(); |
636 |
} |
637 |
}); |
638 |
|
639 |
try { |
640 |
t.start(); |
641 |
Thread.sleep(SHORT_DELAY_MS); |
642 |
t.interrupt(); |
643 |
lock.lock(); |
644 |
c.signal(); |
645 |
lock.unlock(); |
646 |
assert(t.isInterrupted()); |
647 |
t.join(SHORT_DELAY_MS); |
648 |
assertFalse(t.isAlive()); |
649 |
} |
650 |
catch (Exception ex) { |
651 |
unexpectedException(); |
652 |
} |
653 |
} |
654 |
|
655 |
/** |
656 |
* await is interruptible |
657 |
*/ |
658 |
public void testAwait_Interrupt() { |
659 |
final ReentrantLock lock = new ReentrantLock(); |
660 |
final Condition c = lock.newCondition(); |
661 |
Thread t = new Thread(new Runnable() { |
662 |
public void run() { |
663 |
try { |
664 |
lock.lock(); |
665 |
c.await(); |
666 |
lock.unlock(); |
667 |
threadShouldThrow(); |
668 |
} |
669 |
catch(InterruptedException success) { |
670 |
} |
671 |
} |
672 |
}); |
673 |
|
674 |
try { |
675 |
t.start(); |
676 |
Thread.sleep(SHORT_DELAY_MS); |
677 |
t.interrupt(); |
678 |
t.join(SHORT_DELAY_MS); |
679 |
assertFalse(t.isAlive()); |
680 |
} |
681 |
catch (Exception ex) { |
682 |
unexpectedException(); |
683 |
} |
684 |
} |
685 |
|
686 |
/** |
687 |
* awaitNanos is interruptible |
688 |
*/ |
689 |
public void testAwaitNanos_Interrupt() { |
690 |
final ReentrantLock lock = new ReentrantLock(); |
691 |
final Condition c = lock.newCondition(); |
692 |
Thread t = new Thread(new Runnable() { |
693 |
public void run() { |
694 |
try { |
695 |
lock.lock(); |
696 |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
697 |
lock.unlock(); |
698 |
threadShouldThrow(); |
699 |
} |
700 |
catch(InterruptedException success) { |
701 |
} |
702 |
} |
703 |
}); |
704 |
|
705 |
try { |
706 |
t.start(); |
707 |
Thread.sleep(SHORT_DELAY_MS); |
708 |
t.interrupt(); |
709 |
t.join(SHORT_DELAY_MS); |
710 |
assertFalse(t.isAlive()); |
711 |
} |
712 |
catch (Exception ex) { |
713 |
unexpectedException(); |
714 |
} |
715 |
} |
716 |
|
717 |
/** |
718 |
* awaitUntil is interruptible |
719 |
*/ |
720 |
public void testAwaitUntil_Interrupt() { |
721 |
final ReentrantLock lock = new ReentrantLock(); |
722 |
final Condition c = lock.newCondition(); |
723 |
Thread t = new Thread(new Runnable() { |
724 |
public void run() { |
725 |
try { |
726 |
lock.lock(); |
727 |
java.util.Date d = new java.util.Date(); |
728 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
729 |
lock.unlock(); |
730 |
threadShouldThrow(); |
731 |
} |
732 |
catch(InterruptedException success) { |
733 |
} |
734 |
} |
735 |
}); |
736 |
|
737 |
try { |
738 |
t.start(); |
739 |
Thread.sleep(SHORT_DELAY_MS); |
740 |
t.interrupt(); |
741 |
t.join(SHORT_DELAY_MS); |
742 |
assertFalse(t.isAlive()); |
743 |
} |
744 |
catch (Exception ex) { |
745 |
unexpectedException(); |
746 |
} |
747 |
} |
748 |
|
749 |
/** |
750 |
* signalAll wakes up all threads |
751 |
*/ |
752 |
public void testSignalAll() { |
753 |
final ReentrantLock lock = new ReentrantLock(); |
754 |
final Condition c = lock.newCondition(); |
755 |
Thread t1 = new Thread(new Runnable() { |
756 |
public void run() { |
757 |
try { |
758 |
lock.lock(); |
759 |
c.await(); |
760 |
lock.unlock(); |
761 |
} |
762 |
catch(InterruptedException e) { |
763 |
threadUnexpectedException(); |
764 |
} |
765 |
} |
766 |
}); |
767 |
|
768 |
Thread t2 = new Thread(new Runnable() { |
769 |
public void run() { |
770 |
try { |
771 |
lock.lock(); |
772 |
c.await(); |
773 |
lock.unlock(); |
774 |
} |
775 |
catch(InterruptedException e) { |
776 |
threadUnexpectedException(); |
777 |
} |
778 |
} |
779 |
}); |
780 |
|
781 |
try { |
782 |
t1.start(); |
783 |
t2.start(); |
784 |
Thread.sleep(SHORT_DELAY_MS); |
785 |
lock.lock(); |
786 |
c.signalAll(); |
787 |
lock.unlock(); |
788 |
t1.join(SHORT_DELAY_MS); |
789 |
t2.join(SHORT_DELAY_MS); |
790 |
assertFalse(t1.isAlive()); |
791 |
assertFalse(t2.isAlive()); |
792 |
} |
793 |
catch (Exception ex) { |
794 |
unexpectedException(); |
795 |
} |
796 |
} |
797 |
|
798 |
/** |
799 |
* A serialized lock deserializes as unlocked |
800 |
*/ |
801 |
public void testSerialization() { |
802 |
ReentrantLock l = new ReentrantLock(); |
803 |
l.lock(); |
804 |
l.unlock(); |
805 |
|
806 |
try { |
807 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
808 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
809 |
out.writeObject(l); |
810 |
out.close(); |
811 |
|
812 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
813 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
814 |
ReentrantLock r = (ReentrantLock) in.readObject(); |
815 |
r.lock(); |
816 |
r.unlock(); |
817 |
} catch(Exception e){ |
818 |
e.printStackTrace(); |
819 |
unexpectedException(); |
820 |
} |
821 |
} |
822 |
|
823 |
} |