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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.io.*; |
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import java.util.*; |
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|
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public class ReentrantReadWriteLockTest 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(ReentrantReadWriteLockTest.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 implements Runnable { |
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final ReentrantReadWriteLock lock; |
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InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
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public void run() { |
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try { |
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lock.writeLock().lockInterruptibly(); |
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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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/** |
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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 ReentrantReadWriteLock lock; |
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InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; } |
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public void run() { |
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try { |
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lock.writeLock().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 PublicReentrantReadWriteLock extends ReentrantReadWriteLock { |
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PublicReentrantReadWriteLock() { super(); } |
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public Collection<Thread> getQueuedThreads() { |
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return super.getQueuedThreads(); |
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} |
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} |
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|
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/** |
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* Constructor sets given fairness, and is in unlocked state |
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*/ |
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public void testConstructor() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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assertFalse(rl.isFair()); |
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assertFalse(rl.isWriteLocked()); |
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assertEquals(0, rl.getReadLockCount()); |
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ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true); |
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assertTrue(r2.isFair()); |
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assertFalse(r2.isWriteLocked()); |
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assertEquals(0, r2.getReadLockCount()); |
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} |
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|
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/** |
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* write-locking and read-locking an unlocked lock succeed |
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*/ |
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public void testLock() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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rl.writeLock().lock(); |
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assertTrue(rl.isWriteLocked()); |
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assertTrue(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.writeLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.readLock().lock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(1, rl.getReadLockCount()); |
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rl.readLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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} |
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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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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true); |
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rl.writeLock().lock(); |
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assertTrue(rl.isWriteLocked()); |
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assertTrue(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.writeLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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rl.readLock().lock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(1, rl.getReadLockCount()); |
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rl.readLock().unlock(); |
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assertFalse(rl.isWriteLocked()); |
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assertFalse(rl.isWriteLockedByCurrentThread()); |
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assertEquals(0, rl.getReadLockCount()); |
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} |
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|
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/** |
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* getWriteHoldCount returns number of recursive holds |
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*/ |
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public void testGetHoldCount() { |
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ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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for(int i = 1; i <= SIZE; i++) { |
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lock.writeLock().lock(); |
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assertEquals(i,lock.getWriteHoldCount()); |
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} |
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for(int i = SIZE; i > 0; i--) { |
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lock.writeLock().unlock(); |
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assertEquals(i-1,lock.getWriteHoldCount()); |
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} |
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} |
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|
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|
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/** |
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* write-unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testUnlock_IllegalMonitorStateException() { |
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ReentrantReadWriteLock rl = new ReentrantReadWriteLock(); |
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try { |
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rl.writeLock().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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/** |
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* write-lockInterruptibly is interruptible |
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*/ |
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public void testWriteLockInterruptibly_Interrupted() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().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.writeLock().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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try { |
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t.start(); |
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t.interrupt(); |
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lock.writeLock().unlock(); |
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t.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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* timed write-trylock is interruptible |
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*/ |
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public void testWriteTryLock_Interrupted() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().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.writeLock().tryLock(1000,TimeUnit.MILLISECONDS); |
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threadShouldThrow(); |
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} catch(InterruptedException success){} |
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} |
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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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lock.writeLock().unlock(); |
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t.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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* read-lockInterruptibly is interruptible |
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*/ |
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public void testReadLockInterruptibly_Interrupted() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().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.readLock().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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try { |
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t.start(); |
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t.interrupt(); |
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lock.writeLock().unlock(); |
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t.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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* timed read-trylock is interruptible |
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*/ |
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public void testReadTryLock_Interrupted() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().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.readLock().tryLock(1000,TimeUnit.MILLISECONDS); |
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threadShouldThrow(); |
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} catch(InterruptedException success){} |
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} |
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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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t.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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* write-trylock fails if locked |
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*/ |
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public void testWriteTryLockWhenLocked() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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threadAssertFalse(lock.writeLock().tryLock()); |
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} |
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}); |
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try { |
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t.start(); |
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t.join(); |
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lock.writeLock().unlock(); |
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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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* read-trylock fails if locked |
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*/ |
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public void testReadTryLockWhenLocked() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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threadAssertFalse(lock.readLock().tryLock()); |
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} |
276 |
}); |
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try { |
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t.start(); |
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t.join(); |
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lock.writeLock().unlock(); |
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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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* Multiple threads can hold a read lock when not write-locked |
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*/ |
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public void testMultipleReadLocks() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.readLock().lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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threadAssertTrue(lock.readLock().tryLock()); |
295 |
lock.readLock().unlock(); |
296 |
} |
297 |
}); |
298 |
try { |
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t.start(); |
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t.join(); |
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lock.readLock().unlock(); |
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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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* A writelock succeeds after reading threads unlock |
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*/ |
310 |
public void testWriteAfterMultipleReadLocks() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.readLock().lock(); |
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Thread t1 = new Thread(new Runnable() { |
314 |
public void run() { |
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lock.readLock().lock(); |
316 |
lock.readLock().unlock(); |
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} |
318 |
}); |
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Thread t2 = new Thread(new Runnable() { |
320 |
public void run() { |
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lock.writeLock().lock(); |
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lock.writeLock().unlock(); |
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} |
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}); |
325 |
|
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try { |
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t1.start(); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
330 |
lock.readLock().unlock(); |
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t1.join(MEDIUM_DELAY_MS); |
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t2.join(MEDIUM_DELAY_MS); |
333 |
assertTrue(!t1.isAlive()); |
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assertTrue(!t2.isAlive()); |
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|
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} catch(Exception e){ |
337 |
unexpectedException(); |
338 |
} |
339 |
} |
340 |
|
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/** |
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* Readlocks succeed after a writing thread unlocks |
343 |
*/ |
344 |
public void testReadAfterWriteLock() { |
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final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
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lock.writeLock().lock(); |
347 |
Thread t1 = new Thread(new Runnable() { |
348 |
public void run() { |
349 |
lock.readLock().lock(); |
350 |
lock.readLock().unlock(); |
351 |
} |
352 |
}); |
353 |
Thread t2 = new Thread(new Runnable() { |
354 |
public void run() { |
355 |
lock.readLock().lock(); |
356 |
lock.readLock().unlock(); |
357 |
} |
358 |
}); |
359 |
|
360 |
try { |
361 |
t1.start(); |
362 |
t2.start(); |
363 |
Thread.sleep(SHORT_DELAY_MS); |
364 |
lock.writeLock().unlock(); |
365 |
t1.join(MEDIUM_DELAY_MS); |
366 |
t2.join(MEDIUM_DELAY_MS); |
367 |
assertTrue(!t1.isAlive()); |
368 |
assertTrue(!t2.isAlive()); |
369 |
|
370 |
} catch(Exception e){ |
371 |
unexpectedException(); |
372 |
} |
373 |
} |
374 |
|
375 |
|
376 |
/** |
377 |
* Read trylock succeeds if readlocked but not writelocked |
378 |
*/ |
379 |
public void testTryLockWhenReadLocked() { |
380 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
381 |
lock.readLock().lock(); |
382 |
Thread t = new Thread(new Runnable() { |
383 |
public void run() { |
384 |
threadAssertTrue(lock.readLock().tryLock()); |
385 |
lock.readLock().unlock(); |
386 |
} |
387 |
}); |
388 |
try { |
389 |
t.start(); |
390 |
t.join(); |
391 |
lock.readLock().unlock(); |
392 |
} catch(Exception e){ |
393 |
unexpectedException(); |
394 |
} |
395 |
} |
396 |
|
397 |
|
398 |
|
399 |
/** |
400 |
* write trylock fails when readlocked |
401 |
*/ |
402 |
public void testWriteTryLockWhenReadLocked() { |
403 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
404 |
lock.readLock().lock(); |
405 |
Thread t = new Thread(new Runnable() { |
406 |
public void run() { |
407 |
threadAssertFalse(lock.writeLock().tryLock()); |
408 |
} |
409 |
}); |
410 |
try { |
411 |
t.start(); |
412 |
t.join(); |
413 |
lock.readLock().unlock(); |
414 |
} catch(Exception e){ |
415 |
unexpectedException(); |
416 |
} |
417 |
} |
418 |
|
419 |
|
420 |
|
421 |
/** |
422 |
* write timed trylock times out if locked |
423 |
*/ |
424 |
public void testWriteTryLock_Timeout() { |
425 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
426 |
lock.writeLock().lock(); |
427 |
Thread t = new Thread(new Runnable() { |
428 |
public void run() { |
429 |
try { |
430 |
threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS)); |
431 |
} catch (Exception ex) { |
432 |
threadUnexpectedException(); |
433 |
} |
434 |
} |
435 |
}); |
436 |
try { |
437 |
t.start(); |
438 |
t.join(); |
439 |
lock.writeLock().unlock(); |
440 |
} catch(Exception e){ |
441 |
unexpectedException(); |
442 |
} |
443 |
} |
444 |
|
445 |
/** |
446 |
* read timed trylock times out if write-locked |
447 |
*/ |
448 |
public void testReadTryLock_Timeout() { |
449 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
450 |
lock.writeLock().lock(); |
451 |
Thread t = new Thread(new Runnable() { |
452 |
public void run() { |
453 |
try { |
454 |
threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS)); |
455 |
} catch (Exception ex) { |
456 |
threadUnexpectedException(); |
457 |
} |
458 |
} |
459 |
}); |
460 |
try { |
461 |
t.start(); |
462 |
t.join(); |
463 |
lock.writeLock().unlock(); |
464 |
} catch(Exception e){ |
465 |
unexpectedException(); |
466 |
} |
467 |
} |
468 |
|
469 |
|
470 |
/** |
471 |
* write lockInterruptibly succeeds if lock free else is interruptible |
472 |
*/ |
473 |
public void testWriteLockInterruptibly() { |
474 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
475 |
try { |
476 |
lock.writeLock().lockInterruptibly(); |
477 |
} catch(Exception e) { |
478 |
unexpectedException(); |
479 |
} |
480 |
Thread t = new Thread(new Runnable() { |
481 |
public void run() { |
482 |
try { |
483 |
lock.writeLock().lockInterruptibly(); |
484 |
threadShouldThrow(); |
485 |
} |
486 |
catch(InterruptedException success) { |
487 |
} |
488 |
} |
489 |
}); |
490 |
try { |
491 |
t.start(); |
492 |
t.interrupt(); |
493 |
t.join(); |
494 |
lock.writeLock().unlock(); |
495 |
} catch(Exception e){ |
496 |
unexpectedException(); |
497 |
} |
498 |
} |
499 |
|
500 |
/** |
501 |
* read lockInterruptibly succeeds if lock free else is interruptible |
502 |
*/ |
503 |
public void testReadLockInterruptibly() { |
504 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
505 |
try { |
506 |
lock.writeLock().lockInterruptibly(); |
507 |
} catch(Exception e) { |
508 |
unexpectedException(); |
509 |
} |
510 |
Thread t = new Thread(new Runnable() { |
511 |
public void run() { |
512 |
try { |
513 |
lock.readLock().lockInterruptibly(); |
514 |
threadShouldThrow(); |
515 |
} |
516 |
catch(InterruptedException success) { |
517 |
} |
518 |
} |
519 |
}); |
520 |
try { |
521 |
t.start(); |
522 |
t.interrupt(); |
523 |
t.join(); |
524 |
lock.writeLock().unlock(); |
525 |
} catch(Exception e){ |
526 |
unexpectedException(); |
527 |
} |
528 |
} |
529 |
|
530 |
/** |
531 |
* Calling await without holding lock throws IllegalMonitorStateException |
532 |
*/ |
533 |
public void testAwait_IllegalMonitor() { |
534 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
535 |
final Condition c = lock.writeLock().newCondition(); |
536 |
try { |
537 |
c.await(); |
538 |
shouldThrow(); |
539 |
} |
540 |
catch (IllegalMonitorStateException success) { |
541 |
} |
542 |
catch (Exception ex) { |
543 |
shouldThrow(); |
544 |
} |
545 |
} |
546 |
|
547 |
/** |
548 |
* Calling signal without holding lock throws IllegalMonitorStateException |
549 |
*/ |
550 |
public void testSignal_IllegalMonitor() { |
551 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
552 |
final Condition c = lock.writeLock().newCondition(); |
553 |
try { |
554 |
c.signal(); |
555 |
shouldThrow(); |
556 |
} |
557 |
catch (IllegalMonitorStateException success) { |
558 |
} |
559 |
catch (Exception ex) { |
560 |
unexpectedException(); |
561 |
} |
562 |
} |
563 |
|
564 |
/** |
565 |
* awaitNanos without a signal times out |
566 |
*/ |
567 |
public void testAwaitNanos_Timeout() { |
568 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
569 |
final Condition c = lock.writeLock().newCondition(); |
570 |
try { |
571 |
lock.writeLock().lock(); |
572 |
long t = c.awaitNanos(100); |
573 |
assertTrue(t <= 0); |
574 |
lock.writeLock().unlock(); |
575 |
} |
576 |
catch (Exception ex) { |
577 |
unexpectedException(); |
578 |
} |
579 |
} |
580 |
|
581 |
|
582 |
/** |
583 |
* timed await without a signal times out |
584 |
*/ |
585 |
public void testAwait_Timeout() { |
586 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
587 |
final Condition c = lock.writeLock().newCondition(); |
588 |
try { |
589 |
lock.writeLock().lock(); |
590 |
assertFalse(c.await(10, TimeUnit.MILLISECONDS)); |
591 |
lock.writeLock().unlock(); |
592 |
} |
593 |
catch (Exception ex) { |
594 |
unexpectedException(); |
595 |
} |
596 |
} |
597 |
|
598 |
/** |
599 |
* awaitUntil without a signal times out |
600 |
*/ |
601 |
public void testAwaitUntil_Timeout() { |
602 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
603 |
final Condition c = lock.writeLock().newCondition(); |
604 |
try { |
605 |
lock.writeLock().lock(); |
606 |
java.util.Date d = new java.util.Date(); |
607 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
608 |
lock.writeLock().unlock(); |
609 |
} |
610 |
catch (Exception ex) { |
611 |
unexpectedException(); |
612 |
} |
613 |
} |
614 |
|
615 |
/** |
616 |
* await returns when signalled |
617 |
*/ |
618 |
public void testAwait() { |
619 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
620 |
final Condition c = lock.writeLock().newCondition(); |
621 |
Thread t = new Thread(new Runnable() { |
622 |
public void run() { |
623 |
try { |
624 |
lock.writeLock().lock(); |
625 |
c.await(); |
626 |
lock.writeLock().unlock(); |
627 |
} |
628 |
catch(InterruptedException e) { |
629 |
threadUnexpectedException(); |
630 |
} |
631 |
} |
632 |
}); |
633 |
|
634 |
try { |
635 |
t.start(); |
636 |
Thread.sleep(SHORT_DELAY_MS); |
637 |
lock.writeLock().lock(); |
638 |
c.signal(); |
639 |
lock.writeLock().unlock(); |
640 |
t.join(SHORT_DELAY_MS); |
641 |
assertFalse(t.isAlive()); |
642 |
} |
643 |
catch (Exception ex) { |
644 |
unexpectedException(); |
645 |
} |
646 |
} |
647 |
|
648 |
/** |
649 |
* awaitUninterruptibly doesn't abort on interrupt |
650 |
*/ |
651 |
public void testAwaitUninterruptibly() { |
652 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
653 |
final Condition c = lock.writeLock().newCondition(); |
654 |
Thread t = new Thread(new Runnable() { |
655 |
public void run() { |
656 |
lock.writeLock().lock(); |
657 |
c.awaitUninterruptibly(); |
658 |
lock.writeLock().unlock(); |
659 |
} |
660 |
}); |
661 |
|
662 |
try { |
663 |
t.start(); |
664 |
Thread.sleep(SHORT_DELAY_MS); |
665 |
t.interrupt(); |
666 |
lock.writeLock().lock(); |
667 |
c.signal(); |
668 |
lock.writeLock().unlock(); |
669 |
assert(t.isInterrupted()); |
670 |
t.join(SHORT_DELAY_MS); |
671 |
assertFalse(t.isAlive()); |
672 |
} |
673 |
catch (Exception ex) { |
674 |
unexpectedException(); |
675 |
} |
676 |
} |
677 |
|
678 |
/** |
679 |
* await is interruptible |
680 |
*/ |
681 |
public void testAwait_Interrupt() { |
682 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
683 |
final Condition c = lock.writeLock().newCondition(); |
684 |
Thread t = new Thread(new Runnable() { |
685 |
public void run() { |
686 |
try { |
687 |
lock.writeLock().lock(); |
688 |
c.await(); |
689 |
lock.writeLock().unlock(); |
690 |
threadShouldThrow(); |
691 |
} |
692 |
catch(InterruptedException success) { |
693 |
} |
694 |
} |
695 |
}); |
696 |
|
697 |
try { |
698 |
t.start(); |
699 |
Thread.sleep(SHORT_DELAY_MS); |
700 |
t.interrupt(); |
701 |
t.join(SHORT_DELAY_MS); |
702 |
assertFalse(t.isAlive()); |
703 |
} |
704 |
catch (Exception ex) { |
705 |
unexpectedException(); |
706 |
} |
707 |
} |
708 |
|
709 |
/** |
710 |
* awaitNanos is interruptible |
711 |
*/ |
712 |
public void testAwaitNanos_Interrupt() { |
713 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
714 |
final Condition c = lock.writeLock().newCondition(); |
715 |
Thread t = new Thread(new Runnable() { |
716 |
public void run() { |
717 |
try { |
718 |
lock.writeLock().lock(); |
719 |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
720 |
lock.writeLock().unlock(); |
721 |
threadShouldThrow(); |
722 |
} |
723 |
catch(InterruptedException success) { |
724 |
} |
725 |
} |
726 |
}); |
727 |
|
728 |
try { |
729 |
t.start(); |
730 |
Thread.sleep(SHORT_DELAY_MS); |
731 |
t.interrupt(); |
732 |
t.join(SHORT_DELAY_MS); |
733 |
assertFalse(t.isAlive()); |
734 |
} |
735 |
catch (Exception ex) { |
736 |
unexpectedException(); |
737 |
} |
738 |
} |
739 |
|
740 |
/** |
741 |
* awaitUntil is interruptible |
742 |
*/ |
743 |
public void testAwaitUntil_Interrupt() { |
744 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
745 |
final Condition c = lock.writeLock().newCondition(); |
746 |
Thread t = new Thread(new Runnable() { |
747 |
public void run() { |
748 |
try { |
749 |
lock.writeLock().lock(); |
750 |
java.util.Date d = new java.util.Date(); |
751 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
752 |
lock.writeLock().unlock(); |
753 |
threadShouldThrow(); |
754 |
} |
755 |
catch(InterruptedException success) { |
756 |
} |
757 |
} |
758 |
}); |
759 |
|
760 |
try { |
761 |
t.start(); |
762 |
Thread.sleep(SHORT_DELAY_MS); |
763 |
t.interrupt(); |
764 |
t.join(SHORT_DELAY_MS); |
765 |
assertFalse(t.isAlive()); |
766 |
} |
767 |
catch (Exception ex) { |
768 |
unexpectedException(); |
769 |
} |
770 |
} |
771 |
|
772 |
/** |
773 |
* signalAll wakes up all threads |
774 |
*/ |
775 |
public void testSignalAll() { |
776 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
777 |
final Condition c = lock.writeLock().newCondition(); |
778 |
Thread t1 = new Thread(new Runnable() { |
779 |
public void run() { |
780 |
try { |
781 |
lock.writeLock().lock(); |
782 |
c.await(); |
783 |
lock.writeLock().unlock(); |
784 |
} |
785 |
catch(InterruptedException e) { |
786 |
threadUnexpectedException(); |
787 |
} |
788 |
} |
789 |
}); |
790 |
|
791 |
Thread t2 = new Thread(new Runnable() { |
792 |
public void run() { |
793 |
try { |
794 |
lock.writeLock().lock(); |
795 |
c.await(); |
796 |
lock.writeLock().unlock(); |
797 |
} |
798 |
catch(InterruptedException e) { |
799 |
threadUnexpectedException(); |
800 |
} |
801 |
} |
802 |
}); |
803 |
|
804 |
try { |
805 |
t1.start(); |
806 |
t2.start(); |
807 |
Thread.sleep(SHORT_DELAY_MS); |
808 |
lock.writeLock().lock(); |
809 |
c.signalAll(); |
810 |
lock.writeLock().unlock(); |
811 |
t1.join(SHORT_DELAY_MS); |
812 |
t2.join(SHORT_DELAY_MS); |
813 |
assertFalse(t1.isAlive()); |
814 |
assertFalse(t2.isAlive()); |
815 |
} |
816 |
catch (Exception ex) { |
817 |
unexpectedException(); |
818 |
} |
819 |
} |
820 |
|
821 |
/** |
822 |
* A serialized lock deserializes as unlocked |
823 |
*/ |
824 |
public void testSerialization() { |
825 |
ReentrantReadWriteLock l = new ReentrantReadWriteLock(); |
826 |
l.readLock().lock(); |
827 |
l.readLock().unlock(); |
828 |
|
829 |
try { |
830 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
831 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
832 |
out.writeObject(l); |
833 |
out.close(); |
834 |
|
835 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
836 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
837 |
ReentrantReadWriteLock r = (ReentrantReadWriteLock) in.readObject(); |
838 |
r.readLock().lock(); |
839 |
r.readLock().unlock(); |
840 |
} catch(Exception e){ |
841 |
e.printStackTrace(); |
842 |
unexpectedException(); |
843 |
} |
844 |
} |
845 |
|
846 |
/** |
847 |
* getQueueLength reports number of waiting threads |
848 |
*/ |
849 |
public void testGetQueueLength() { |
850 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
851 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
852 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
853 |
try { |
854 |
assertEquals(0, lock.getQueueLength()); |
855 |
lock.writeLock().lock(); |
856 |
t1.start(); |
857 |
Thread.sleep(SHORT_DELAY_MS); |
858 |
assertEquals(1, lock.getQueueLength()); |
859 |
t2.start(); |
860 |
Thread.sleep(SHORT_DELAY_MS); |
861 |
assertEquals(2, lock.getQueueLength()); |
862 |
t1.interrupt(); |
863 |
Thread.sleep(SHORT_DELAY_MS); |
864 |
assertEquals(1, lock.getQueueLength()); |
865 |
lock.writeLock().unlock(); |
866 |
Thread.sleep(SHORT_DELAY_MS); |
867 |
assertEquals(0, lock.getQueueLength()); |
868 |
t1.join(); |
869 |
t2.join(); |
870 |
} catch(Exception e){ |
871 |
unexpectedException(); |
872 |
} |
873 |
} |
874 |
|
875 |
/** |
876 |
* getQueuedThreads includes waiting threads |
877 |
*/ |
878 |
public void testGetQueuedThreads() { |
879 |
final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock(); |
880 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
881 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
882 |
try { |
883 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
884 |
lock.writeLock().lock(); |
885 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
886 |
t1.start(); |
887 |
Thread.sleep(SHORT_DELAY_MS); |
888 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
889 |
t2.start(); |
890 |
Thread.sleep(SHORT_DELAY_MS); |
891 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
892 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
893 |
t1.interrupt(); |
894 |
Thread.sleep(SHORT_DELAY_MS); |
895 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
896 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
897 |
lock.writeLock().unlock(); |
898 |
Thread.sleep(SHORT_DELAY_MS); |
899 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
900 |
t1.join(); |
901 |
t2.join(); |
902 |
} catch(Exception e){ |
903 |
unexpectedException(); |
904 |
} |
905 |
} |
906 |
|
907 |
/** |
908 |
* hasWaiters returns true when a thread is waiting, else false |
909 |
*/ |
910 |
public void testHasWaiters() { |
911 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
912 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition()); |
913 |
Thread t = new Thread(new Runnable() { |
914 |
public void run() { |
915 |
try { |
916 |
lock.writeLock().lock(); |
917 |
threadAssertFalse(c.hasWaiters()); |
918 |
threadAssertEquals(0, c.getWaitQueueLength()); |
919 |
c.await(); |
920 |
lock.writeLock().unlock(); |
921 |
} |
922 |
catch(InterruptedException e) { |
923 |
threadUnexpectedException(); |
924 |
} |
925 |
} |
926 |
}); |
927 |
|
928 |
try { |
929 |
t.start(); |
930 |
Thread.sleep(SHORT_DELAY_MS); |
931 |
lock.writeLock().lock(); |
932 |
assertTrue(c.hasWaiters()); |
933 |
assertEquals(1, c.getWaitQueueLength()); |
934 |
c.signal(); |
935 |
lock.writeLock().unlock(); |
936 |
Thread.sleep(SHORT_DELAY_MS); |
937 |
lock.writeLock().lock(); |
938 |
assertFalse(c.hasWaiters()); |
939 |
assertEquals(0, c.getWaitQueueLength()); |
940 |
lock.writeLock().unlock(); |
941 |
t.join(SHORT_DELAY_MS); |
942 |
assertFalse(t.isAlive()); |
943 |
} |
944 |
catch (Exception ex) { |
945 |
unexpectedException(); |
946 |
} |
947 |
} |
948 |
|
949 |
/** |
950 |
* getWaitQueueLength returns number of waiting threads |
951 |
*/ |
952 |
public void testGetWaitQueueLength() { |
953 |
final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
954 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.writeLock().newCondition()); |
955 |
Thread t1 = new Thread(new Runnable() { |
956 |
public void run() { |
957 |
try { |
958 |
lock.writeLock().lock(); |
959 |
threadAssertFalse(c.hasWaiters()); |
960 |
threadAssertEquals(0, c.getWaitQueueLength()); |
961 |
c.await(); |
962 |
lock.writeLock().unlock(); |
963 |
} |
964 |
catch(InterruptedException e) { |
965 |
threadUnexpectedException(); |
966 |
} |
967 |
} |
968 |
}); |
969 |
|
970 |
Thread t2 = new Thread(new Runnable() { |
971 |
public void run() { |
972 |
try { |
973 |
lock.writeLock().lock(); |
974 |
threadAssertTrue(c.hasWaiters()); |
975 |
threadAssertEquals(1, c.getWaitQueueLength()); |
976 |
c.await(); |
977 |
lock.writeLock().unlock(); |
978 |
} |
979 |
catch(InterruptedException e) { |
980 |
threadUnexpectedException(); |
981 |
} |
982 |
} |
983 |
}); |
984 |
|
985 |
try { |
986 |
t1.start(); |
987 |
Thread.sleep(SHORT_DELAY_MS); |
988 |
t2.start(); |
989 |
Thread.sleep(SHORT_DELAY_MS); |
990 |
lock.writeLock().lock(); |
991 |
assertTrue(c.hasWaiters()); |
992 |
assertEquals(2, c.getWaitQueueLength()); |
993 |
c.signalAll(); |
994 |
lock.writeLock().unlock(); |
995 |
Thread.sleep(SHORT_DELAY_MS); |
996 |
lock.writeLock().lock(); |
997 |
assertFalse(c.hasWaiters()); |
998 |
assertEquals(0, c.getWaitQueueLength()); |
999 |
lock.writeLock().unlock(); |
1000 |
t1.join(SHORT_DELAY_MS); |
1001 |
t2.join(SHORT_DELAY_MS); |
1002 |
assertFalse(t1.isAlive()); |
1003 |
assertFalse(t2.isAlive()); |
1004 |
} |
1005 |
catch (Exception ex) { |
1006 |
unexpectedException(); |
1007 |
} |
1008 |
} |
1009 |
} |