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/* |
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* Written by Doug Lea and Martin Buchholz |
3 |
* with assistance from members of JCP JSR-166 Expert Group and |
4 |
* released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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|
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import static java.util.concurrent.TimeUnit.DAYS; |
9 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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|
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.TimeUnit; |
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import java.util.concurrent.locks.Lock; |
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import java.util.concurrent.locks.StampedLock; |
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import java.util.function.BiConsumer; |
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import java.util.function.Consumer; |
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import java.util.function.Function; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class StampedLockTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(StampedLockTest.class); |
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} |
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|
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/** |
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* A runnable calling writeLockInterruptibly |
34 |
*/ |
35 |
class InterruptibleLockRunnable extends CheckedRunnable { |
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final StampedLock lock; |
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InterruptibleLockRunnable(StampedLock l) { lock = l; } |
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public void realRun() throws InterruptedException { |
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lock.writeLockInterruptibly(); |
40 |
} |
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} |
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|
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/** |
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* A runnable calling writeLockInterruptibly 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 StampedLock lock; |
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InterruptedLockRunnable(StampedLock l) { lock = l; } |
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public void realRun() throws InterruptedException { |
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lock.writeLockInterruptibly(); |
52 |
} |
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} |
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|
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/** |
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* Releases write lock, checking isWriteLocked before and after |
57 |
*/ |
58 |
void releaseWriteLock(StampedLock lock, long s) { |
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assertTrue(lock.isWriteLocked()); |
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lock.unlockWrite(s); |
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assertFalse(lock.isWriteLocked()); |
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} |
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|
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/** |
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* Constructed StampedLock is in unlocked state |
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*/ |
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public void testConstructor() { |
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StampedLock lock; |
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lock = new StampedLock(); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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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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StampedLock lock = new StampedLock(); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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long s = lock.writeLock(); |
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assertTrue(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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lock.unlockWrite(s); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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long rs = lock.readLock(); |
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assertFalse(lock.isWriteLocked()); |
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assertTrue(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 1); |
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lock.unlockRead(rs); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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} |
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|
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/** |
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* unlock releases either a read or write lock |
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*/ |
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public void testUnlock() { |
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StampedLock lock = new StampedLock(); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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long s = lock.writeLock(); |
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assertTrue(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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lock.unlock(s); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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long rs = lock.readLock(); |
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assertFalse(lock.isWriteLocked()); |
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assertTrue(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 1); |
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lock.unlock(rs); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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} |
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|
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/** |
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* tryUnlockRead/Write succeeds if locked in associated mode else |
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* returns false |
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*/ |
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public void testTryUnlock() { |
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StampedLock lock = new StampedLock(); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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long s = lock.writeLock(); |
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assertTrue(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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assertFalse(lock.tryUnlockRead()); |
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assertTrue(lock.tryUnlockWrite()); |
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assertFalse(lock.tryUnlockWrite()); |
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assertFalse(lock.tryUnlockRead()); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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long rs = lock.readLock(); |
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assertFalse(lock.isWriteLocked()); |
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assertTrue(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 1); |
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assertFalse(lock.tryUnlockWrite()); |
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assertTrue(lock.tryUnlockRead()); |
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assertFalse(lock.tryUnlockRead()); |
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assertFalse(lock.tryUnlockWrite()); |
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assertFalse(lock.isWriteLocked()); |
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assertFalse(lock.isReadLocked()); |
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assertEquals(lock.getReadLockCount(), 0); |
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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 testWriteUnlock_IMSE() { |
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StampedLock lock = new StampedLock(); |
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try { |
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lock.unlockWrite(0L); |
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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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* write-unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testWriteUnlock_IMSE2() { |
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StampedLock lock = new StampedLock(); |
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long s = lock.writeLock(); |
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lock.unlockWrite(s); |
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try { |
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lock.unlockWrite(s); |
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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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* write-unlocking after readlock throws IllegalMonitorStateException |
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*/ |
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public void testWriteUnlock_IMSE3() { |
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StampedLock lock = new StampedLock(); |
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long s = lock.readLock(); |
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try { |
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lock.unlockWrite(s); |
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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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* read-unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testReadUnlock_IMSE() { |
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StampedLock lock = new StampedLock(); |
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long s = lock.readLock(); |
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lock.unlockRead(s); |
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try { |
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lock.unlockRead(s); |
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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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* read-unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testReadUnlock_IMSE2() { |
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StampedLock lock = new StampedLock(); |
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try { |
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lock.unlockRead(0L); |
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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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* read-unlocking after writeLock throws IllegalMonitorStateException |
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*/ |
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public void testReadUnlock_IMSE3() { |
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StampedLock lock = new StampedLock(); |
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long s = lock.writeLock(); |
226 |
try { |
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lock.unlockRead(s); |
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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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* validate(0) fails |
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*/ |
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public void testValidate0() { |
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StampedLock lock = new StampedLock(); |
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assertFalse(lock.validate(0L)); |
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} |
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|
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/** |
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* A stamp obtained from a successful lock operation validates |
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*/ |
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public void testValidate() throws InterruptedException { |
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StampedLock lock = new StampedLock(); |
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long s = lock.writeLock(); |
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assertTrue(lock.validate(s)); |
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lock.unlockWrite(s); |
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s = lock.readLock(); |
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assertTrue(lock.validate(s)); |
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lock.unlockRead(s); |
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assertTrue((s = lock.tryWriteLock()) != 0L); |
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assertTrue(lock.validate(s)); |
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lock.unlockWrite(s); |
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assertTrue((s = lock.tryReadLock()) != 0L); |
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assertTrue(lock.validate(s)); |
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lock.unlockRead(s); |
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assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
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assertTrue(lock.validate(s)); |
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lock.unlockWrite(s); |
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assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
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assertTrue(lock.validate(s)); |
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lock.unlockRead(s); |
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assertTrue((s = lock.tryOptimisticRead()) != 0L); |
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} |
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|
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/** |
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* A stamp obtained from an unsuccessful lock operation does not validate |
268 |
*/ |
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public void testValidate2() throws InterruptedException { |
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StampedLock lock = new StampedLock(); |
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long s; |
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assertTrue((s = lock.writeLock()) != 0L); |
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assertTrue(lock.validate(s)); |
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assertFalse(lock.validate(lock.tryWriteLock())); |
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assertFalse(lock.validate(lock.tryWriteLock(10L, MILLISECONDS))); |
276 |
assertFalse(lock.validate(lock.tryReadLock())); |
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assertFalse(lock.validate(lock.tryReadLock(10L, MILLISECONDS))); |
278 |
assertFalse(lock.validate(lock.tryOptimisticRead())); |
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lock.unlockWrite(s); |
280 |
} |
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|
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/** |
283 |
* writeLockInterruptibly is interruptible |
284 |
*/ |
285 |
public void testWriteLockInterruptibly_Interruptible() |
286 |
throws InterruptedException { |
287 |
final CountDownLatch running = new CountDownLatch(1); |
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final StampedLock lock = new StampedLock(); |
289 |
long s = lock.writeLock(); |
290 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
291 |
public void realRun() throws InterruptedException { |
292 |
running.countDown(); |
293 |
lock.writeLockInterruptibly(); |
294 |
}}); |
295 |
|
296 |
running.await(); |
297 |
waitForThreadToEnterWaitState(t, 100); |
298 |
t.interrupt(); |
299 |
awaitTermination(t); |
300 |
releaseWriteLock(lock, s); |
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} |
302 |
|
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/** |
304 |
* timed tryWriteLock is interruptible |
305 |
*/ |
306 |
public void testWriteTryLock_Interruptible() throws InterruptedException { |
307 |
final CountDownLatch running = new CountDownLatch(1); |
308 |
final StampedLock lock = new StampedLock(); |
309 |
long s = lock.writeLock(); |
310 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
311 |
public void realRun() throws InterruptedException { |
312 |
running.countDown(); |
313 |
lock.tryWriteLock(2 * LONG_DELAY_MS, MILLISECONDS); |
314 |
}}); |
315 |
|
316 |
running.await(); |
317 |
waitForThreadToEnterWaitState(t, 100); |
318 |
t.interrupt(); |
319 |
awaitTermination(t); |
320 |
releaseWriteLock(lock, s); |
321 |
} |
322 |
|
323 |
/** |
324 |
* readLockInterruptibly is interruptible |
325 |
*/ |
326 |
public void testReadLockInterruptibly_Interruptible() |
327 |
throws InterruptedException { |
328 |
final CountDownLatch running = new CountDownLatch(1); |
329 |
final StampedLock lock = new StampedLock(); |
330 |
long s = lock.writeLock(); |
331 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
332 |
public void realRun() throws InterruptedException { |
333 |
running.countDown(); |
334 |
lock.readLockInterruptibly(); |
335 |
}}); |
336 |
|
337 |
running.await(); |
338 |
waitForThreadToEnterWaitState(t, 100); |
339 |
t.interrupt(); |
340 |
awaitTermination(t); |
341 |
releaseWriteLock(lock, s); |
342 |
} |
343 |
|
344 |
/** |
345 |
* timed tryReadLock is interruptible |
346 |
*/ |
347 |
public void testReadTryLock_Interruptible() throws InterruptedException { |
348 |
final CountDownLatch running = new CountDownLatch(1); |
349 |
final StampedLock lock = new StampedLock(); |
350 |
long s = lock.writeLock(); |
351 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
352 |
public void realRun() throws InterruptedException { |
353 |
running.countDown(); |
354 |
lock.tryReadLock(2 * LONG_DELAY_MS, MILLISECONDS); |
355 |
}}); |
356 |
|
357 |
running.await(); |
358 |
waitForThreadToEnterWaitState(t, 100); |
359 |
t.interrupt(); |
360 |
awaitTermination(t); |
361 |
releaseWriteLock(lock, s); |
362 |
} |
363 |
|
364 |
/** |
365 |
* tryWriteLock on an unlocked lock succeeds |
366 |
*/ |
367 |
public void testWriteTryLock() { |
368 |
final StampedLock lock = new StampedLock(); |
369 |
long s = lock.tryWriteLock(); |
370 |
assertTrue(s != 0L); |
371 |
assertTrue(lock.isWriteLocked()); |
372 |
long s2 = lock.tryWriteLock(); |
373 |
assertEquals(s2, 0L); |
374 |
releaseWriteLock(lock, s); |
375 |
} |
376 |
|
377 |
/** |
378 |
* tryWriteLock fails if locked |
379 |
*/ |
380 |
public void testWriteTryLockWhenLocked() { |
381 |
final StampedLock lock = new StampedLock(); |
382 |
long s = lock.writeLock(); |
383 |
Thread t = newStartedThread(new CheckedRunnable() { |
384 |
public void realRun() { |
385 |
long ws = lock.tryWriteLock(); |
386 |
assertTrue(ws == 0L); |
387 |
}}); |
388 |
|
389 |
awaitTermination(t); |
390 |
releaseWriteLock(lock, s); |
391 |
} |
392 |
|
393 |
/** |
394 |
* tryReadLock fails if write-locked |
395 |
*/ |
396 |
public void testReadTryLockWhenLocked() { |
397 |
final StampedLock lock = new StampedLock(); |
398 |
long s = lock.writeLock(); |
399 |
Thread t = newStartedThread(new CheckedRunnable() { |
400 |
public void realRun() { |
401 |
long rs = lock.tryReadLock(); |
402 |
assertEquals(rs, 0L); |
403 |
}}); |
404 |
|
405 |
awaitTermination(t); |
406 |
releaseWriteLock(lock, s); |
407 |
} |
408 |
|
409 |
/** |
410 |
* Multiple threads can hold a read lock when not write-locked |
411 |
*/ |
412 |
public void testMultipleReadLocks() { |
413 |
final StampedLock lock = new StampedLock(); |
414 |
final long s = lock.readLock(); |
415 |
Thread t = newStartedThread(new CheckedRunnable() { |
416 |
public void realRun() throws InterruptedException { |
417 |
long s2 = lock.tryReadLock(); |
418 |
assertTrue(s2 != 0L); |
419 |
lock.unlockRead(s2); |
420 |
long s3 = lock.tryReadLock(LONG_DELAY_MS, MILLISECONDS); |
421 |
assertTrue(s3 != 0L); |
422 |
lock.unlockRead(s3); |
423 |
long s4 = lock.readLock(); |
424 |
lock.unlockRead(s4); |
425 |
}}); |
426 |
|
427 |
awaitTermination(t); |
428 |
lock.unlockRead(s); |
429 |
} |
430 |
|
431 |
/** |
432 |
* A writelock succeeds only after a reading thread unlocks |
433 |
*/ |
434 |
public void testWriteAfterReadLock() throws InterruptedException { |
435 |
final CountDownLatch running = new CountDownLatch(1); |
436 |
final StampedLock lock = new StampedLock(); |
437 |
long rs = lock.readLock(); |
438 |
Thread t = newStartedThread(new CheckedRunnable() { |
439 |
public void realRun() { |
440 |
running.countDown(); |
441 |
long s = lock.writeLock(); |
442 |
lock.unlockWrite(s); |
443 |
}}); |
444 |
|
445 |
running.await(); |
446 |
waitForThreadToEnterWaitState(t, 100); |
447 |
assertFalse(lock.isWriteLocked()); |
448 |
lock.unlockRead(rs); |
449 |
awaitTermination(t); |
450 |
assertFalse(lock.isWriteLocked()); |
451 |
} |
452 |
|
453 |
/** |
454 |
* A writelock succeeds only after reading threads unlock |
455 |
*/ |
456 |
public void testWriteAfterMultipleReadLocks() { |
457 |
final StampedLock lock = new StampedLock(); |
458 |
long s = lock.readLock(); |
459 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
460 |
public void realRun() { |
461 |
long rs = lock.readLock(); |
462 |
lock.unlockRead(rs); |
463 |
}}); |
464 |
|
465 |
awaitTermination(t1); |
466 |
|
467 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
468 |
public void realRun() { |
469 |
long ws = lock.writeLock(); |
470 |
lock.unlockWrite(ws); |
471 |
}}); |
472 |
|
473 |
assertFalse(lock.isWriteLocked()); |
474 |
lock.unlockRead(s); |
475 |
awaitTermination(t2); |
476 |
assertFalse(lock.isWriteLocked()); |
477 |
} |
478 |
|
479 |
/** |
480 |
* Readlocks succeed only after a writing thread unlocks |
481 |
*/ |
482 |
public void testReadAfterWriteLock() { |
483 |
final StampedLock lock = new StampedLock(); |
484 |
final long s = lock.writeLock(); |
485 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
486 |
public void realRun() { |
487 |
long rs = lock.readLock(); |
488 |
lock.unlockRead(rs); |
489 |
}}); |
490 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
491 |
public void realRun() { |
492 |
long rs = lock.readLock(); |
493 |
lock.unlockRead(rs); |
494 |
}}); |
495 |
|
496 |
releaseWriteLock(lock, s); |
497 |
awaitTermination(t1); |
498 |
awaitTermination(t2); |
499 |
} |
500 |
|
501 |
/** |
502 |
* tryReadLock succeeds if readlocked but not writelocked |
503 |
*/ |
504 |
public void testTryLockWhenReadLocked() { |
505 |
final StampedLock lock = new StampedLock(); |
506 |
long s = lock.readLock(); |
507 |
Thread t = newStartedThread(new CheckedRunnable() { |
508 |
public void realRun() { |
509 |
long rs = lock.tryReadLock(); |
510 |
threadAssertTrue(rs != 0L); |
511 |
lock.unlockRead(rs); |
512 |
}}); |
513 |
|
514 |
awaitTermination(t); |
515 |
lock.unlockRead(s); |
516 |
} |
517 |
|
518 |
/** |
519 |
* tryWriteLock fails when readlocked |
520 |
*/ |
521 |
public void testWriteTryLockWhenReadLocked() { |
522 |
final StampedLock lock = new StampedLock(); |
523 |
long s = lock.readLock(); |
524 |
Thread t = newStartedThread(new CheckedRunnable() { |
525 |
public void realRun() { |
526 |
long ws = lock.tryWriteLock(); |
527 |
threadAssertEquals(ws, 0L); |
528 |
}}); |
529 |
|
530 |
awaitTermination(t); |
531 |
lock.unlockRead(s); |
532 |
} |
533 |
|
534 |
/** |
535 |
* timed tryWriteLock times out if locked |
536 |
*/ |
537 |
public void testWriteTryLock_Timeout() { |
538 |
final StampedLock lock = new StampedLock(); |
539 |
long s = lock.writeLock(); |
540 |
Thread t = newStartedThread(new CheckedRunnable() { |
541 |
public void realRun() throws InterruptedException { |
542 |
long startTime = System.nanoTime(); |
543 |
long timeoutMillis = 10; |
544 |
long ws = lock.tryWriteLock(timeoutMillis, MILLISECONDS); |
545 |
assertEquals(ws, 0L); |
546 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
547 |
}}); |
548 |
|
549 |
awaitTermination(t); |
550 |
releaseWriteLock(lock, s); |
551 |
} |
552 |
|
553 |
/** |
554 |
* timed tryReadLock times out if write-locked |
555 |
*/ |
556 |
public void testReadTryLock_Timeout() { |
557 |
final StampedLock lock = new StampedLock(); |
558 |
long s = lock.writeLock(); |
559 |
Thread t = newStartedThread(new CheckedRunnable() { |
560 |
public void realRun() throws InterruptedException { |
561 |
long startTime = System.nanoTime(); |
562 |
long timeoutMillis = 10; |
563 |
long rs = lock.tryReadLock(timeoutMillis, MILLISECONDS); |
564 |
assertEquals(rs, 0L); |
565 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
566 |
}}); |
567 |
|
568 |
awaitTermination(t); |
569 |
assertTrue(lock.isWriteLocked()); |
570 |
lock.unlockWrite(s); |
571 |
} |
572 |
|
573 |
/** |
574 |
* writeLockInterruptibly succeeds if unlocked, else is interruptible |
575 |
*/ |
576 |
public void testWriteLockInterruptibly() throws InterruptedException { |
577 |
final CountDownLatch running = new CountDownLatch(1); |
578 |
final StampedLock lock = new StampedLock(); |
579 |
long s = lock.writeLockInterruptibly(); |
580 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
581 |
public void realRun() throws InterruptedException { |
582 |
running.countDown(); |
583 |
lock.writeLockInterruptibly(); |
584 |
}}); |
585 |
|
586 |
running.await(); |
587 |
waitForThreadToEnterWaitState(t, 100); |
588 |
t.interrupt(); |
589 |
assertTrue(lock.isWriteLocked()); |
590 |
awaitTermination(t); |
591 |
releaseWriteLock(lock, s); |
592 |
} |
593 |
|
594 |
/** |
595 |
* readLockInterruptibly succeeds if lock free else is interruptible |
596 |
*/ |
597 |
public void testReadLockInterruptibly() throws InterruptedException { |
598 |
final CountDownLatch running = new CountDownLatch(1); |
599 |
final StampedLock lock = new StampedLock(); |
600 |
long s; |
601 |
s = lock.readLockInterruptibly(); |
602 |
lock.unlockRead(s); |
603 |
s = lock.writeLockInterruptibly(); |
604 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
605 |
public void realRun() throws InterruptedException { |
606 |
running.countDown(); |
607 |
lock.readLockInterruptibly(); |
608 |
}}); |
609 |
|
610 |
running.await(); |
611 |
waitForThreadToEnterWaitState(t, 100); |
612 |
t.interrupt(); |
613 |
awaitTermination(t); |
614 |
releaseWriteLock(lock, s); |
615 |
} |
616 |
|
617 |
/** |
618 |
* A serialized lock deserializes as unlocked |
619 |
*/ |
620 |
public void testSerialization() { |
621 |
StampedLock lock = new StampedLock(); |
622 |
lock.writeLock(); |
623 |
StampedLock clone = serialClone(lock); |
624 |
assertTrue(lock.isWriteLocked()); |
625 |
assertFalse(clone.isWriteLocked()); |
626 |
long s = clone.writeLock(); |
627 |
assertTrue(clone.isWriteLocked()); |
628 |
clone.unlockWrite(s); |
629 |
assertFalse(clone.isWriteLocked()); |
630 |
} |
631 |
|
632 |
/** |
633 |
* toString indicates current lock state |
634 |
*/ |
635 |
public void testToString() { |
636 |
StampedLock lock = new StampedLock(); |
637 |
assertTrue(lock.toString().contains("Unlocked")); |
638 |
long s = lock.writeLock(); |
639 |
assertTrue(lock.toString().contains("Write-locked")); |
640 |
lock.unlockWrite(s); |
641 |
s = lock.readLock(); |
642 |
assertTrue(lock.toString().contains("Read-locks")); |
643 |
} |
644 |
|
645 |
/** |
646 |
* tryOptimisticRead succeeds and validates if unlocked, fails if locked |
647 |
*/ |
648 |
public void testValidateOptimistic() throws InterruptedException { |
649 |
StampedLock lock = new StampedLock(); |
650 |
long s, p; |
651 |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
652 |
assertTrue(lock.validate(p)); |
653 |
assertTrue((s = lock.writeLock()) != 0L); |
654 |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
655 |
assertTrue(lock.validate(s)); |
656 |
lock.unlockWrite(s); |
657 |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
658 |
assertTrue(lock.validate(p)); |
659 |
assertTrue((s = lock.readLock()) != 0L); |
660 |
assertTrue(lock.validate(s)); |
661 |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
662 |
assertTrue(lock.validate(p)); |
663 |
lock.unlockRead(s); |
664 |
assertTrue((s = lock.tryWriteLock()) != 0L); |
665 |
assertTrue(lock.validate(s)); |
666 |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
667 |
lock.unlockWrite(s); |
668 |
assertTrue((s = lock.tryReadLock()) != 0L); |
669 |
assertTrue(lock.validate(s)); |
670 |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
671 |
lock.unlockRead(s); |
672 |
assertTrue(lock.validate(p)); |
673 |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
674 |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
675 |
assertTrue(lock.validate(s)); |
676 |
lock.unlockWrite(s); |
677 |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
678 |
assertTrue(lock.validate(s)); |
679 |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
680 |
lock.unlockRead(s); |
681 |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
682 |
} |
683 |
|
684 |
/** |
685 |
* tryOptimisticRead stamp does not validate if a write lock intervenes |
686 |
*/ |
687 |
public void testValidateOptimisticWriteLocked() { |
688 |
StampedLock lock = new StampedLock(); |
689 |
long s, p; |
690 |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
691 |
assertTrue((s = lock.writeLock()) != 0L); |
692 |
assertFalse(lock.validate(p)); |
693 |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
694 |
assertTrue(lock.validate(s)); |
695 |
lock.unlockWrite(s); |
696 |
} |
697 |
|
698 |
/** |
699 |
* tryOptimisticRead stamp does not validate if a write lock |
700 |
* intervenes in another thread |
701 |
*/ |
702 |
public void testValidateOptimisticWriteLocked2() |
703 |
throws InterruptedException { |
704 |
final CountDownLatch running = new CountDownLatch(1); |
705 |
final StampedLock lock = new StampedLock(); |
706 |
long s, p; |
707 |
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
708 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
709 |
public void realRun() throws InterruptedException { |
710 |
lock.writeLockInterruptibly(); |
711 |
running.countDown(); |
712 |
lock.writeLockInterruptibly(); |
713 |
}}); |
714 |
|
715 |
running.await(); |
716 |
assertFalse(lock.validate(p)); |
717 |
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
718 |
t.interrupt(); |
719 |
awaitTermination(t); |
720 |
} |
721 |
|
722 |
/** |
723 |
* tryConvertToOptimisticRead succeeds and validates if successfully locked, |
724 |
*/ |
725 |
public void testTryConvertToOptimisticRead() throws InterruptedException { |
726 |
StampedLock lock = new StampedLock(); |
727 |
long s, p; |
728 |
assertEquals(0L, lock.tryConvertToOptimisticRead(0L)); |
729 |
|
730 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
731 |
assertEquals(s, lock.tryConvertToOptimisticRead(s)); |
732 |
assertTrue(lock.validate(s)); |
733 |
|
734 |
assertTrue((p = lock.readLock()) != 0L); |
735 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
736 |
assertEquals(s, lock.tryConvertToOptimisticRead(s)); |
737 |
assertTrue(lock.validate(s)); |
738 |
lock.unlockRead(p); |
739 |
|
740 |
assertTrue((s = lock.writeLock()) != 0L); |
741 |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
742 |
assertTrue(lock.validate(p)); |
743 |
|
744 |
assertTrue((s = lock.readLock()) != 0L); |
745 |
assertTrue(lock.validate(s)); |
746 |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
747 |
assertTrue(lock.validate(p)); |
748 |
|
749 |
assertTrue((s = lock.tryWriteLock()) != 0L); |
750 |
assertTrue(lock.validate(s)); |
751 |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
752 |
assertTrue(lock.validate(p)); |
753 |
|
754 |
assertTrue((s = lock.tryReadLock()) != 0L); |
755 |
assertTrue(lock.validate(s)); |
756 |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
757 |
assertTrue(lock.validate(p)); |
758 |
|
759 |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
760 |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
761 |
assertTrue(lock.validate(p)); |
762 |
|
763 |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
764 |
assertTrue(lock.validate(s)); |
765 |
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
766 |
assertTrue(lock.validate(p)); |
767 |
} |
768 |
|
769 |
/** |
770 |
* tryConvertToReadLock succeeds and validates if successfully locked |
771 |
* or lock free; |
772 |
*/ |
773 |
public void testTryConvertToReadLock() throws InterruptedException { |
774 |
StampedLock lock = new StampedLock(); |
775 |
long s, p; |
776 |
|
777 |
assertFalse((p = lock.tryConvertToReadLock(0L)) != 0L); |
778 |
|
779 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
780 |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
781 |
assertTrue(lock.isReadLocked()); |
782 |
assertEquals(1, lock.getReadLockCount()); |
783 |
lock.unlockRead(p); |
784 |
|
785 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
786 |
lock.readLock(); |
787 |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
788 |
assertTrue(lock.isReadLocked()); |
789 |
assertEquals(2, lock.getReadLockCount()); |
790 |
lock.unlockRead(p); |
791 |
lock.unlockRead(p); |
792 |
|
793 |
assertTrue((s = lock.writeLock()) != 0L); |
794 |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
795 |
assertTrue(lock.validate(p)); |
796 |
assertTrue(lock.isReadLocked()); |
797 |
assertEquals(1, lock.getReadLockCount()); |
798 |
lock.unlockRead(p); |
799 |
|
800 |
assertTrue((s = lock.readLock()) != 0L); |
801 |
assertTrue(lock.validate(s)); |
802 |
assertEquals(s, lock.tryConvertToReadLock(s)); |
803 |
assertTrue(lock.validate(s)); |
804 |
assertTrue(lock.isReadLocked()); |
805 |
assertEquals(1, lock.getReadLockCount()); |
806 |
lock.unlockRead(s); |
807 |
|
808 |
assertTrue((s = lock.tryWriteLock()) != 0L); |
809 |
assertTrue(lock.validate(s)); |
810 |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
811 |
assertTrue(lock.validate(p)); |
812 |
assertEquals(1, lock.getReadLockCount()); |
813 |
lock.unlockRead(p); |
814 |
|
815 |
assertTrue((s = lock.tryReadLock()) != 0L); |
816 |
assertTrue(lock.validate(s)); |
817 |
assertEquals(s, lock.tryConvertToReadLock(s)); |
818 |
assertTrue(lock.validate(s)); |
819 |
assertTrue(lock.isReadLocked()); |
820 |
assertEquals(1, lock.getReadLockCount()); |
821 |
lock.unlockRead(s); |
822 |
|
823 |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
824 |
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
825 |
assertTrue(lock.validate(p)); |
826 |
assertTrue(lock.isReadLocked()); |
827 |
assertEquals(1, lock.getReadLockCount()); |
828 |
lock.unlockRead(p); |
829 |
|
830 |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
831 |
assertTrue(lock.validate(s)); |
832 |
assertEquals(s, lock.tryConvertToReadLock(s)); |
833 |
assertTrue(lock.validate(s)); |
834 |
assertTrue(lock.isReadLocked()); |
835 |
assertEquals(1, lock.getReadLockCount()); |
836 |
lock.unlockRead(s); |
837 |
} |
838 |
|
839 |
/** |
840 |
* tryConvertToWriteLock succeeds and validates if successfully locked |
841 |
* or lock free; |
842 |
*/ |
843 |
public void testTryConvertToWriteLock() throws InterruptedException { |
844 |
StampedLock lock = new StampedLock(); |
845 |
long s, p; |
846 |
|
847 |
assertFalse((p = lock.tryConvertToWriteLock(0L)) != 0L); |
848 |
|
849 |
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
850 |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
851 |
assertTrue(lock.isWriteLocked()); |
852 |
lock.unlockWrite(p); |
853 |
|
854 |
assertTrue((s = lock.writeLock()) != 0L); |
855 |
assertEquals(s, lock.tryConvertToWriteLock(s)); |
856 |
assertTrue(lock.validate(s)); |
857 |
assertTrue(lock.isWriteLocked()); |
858 |
lock.unlockWrite(s); |
859 |
|
860 |
assertTrue((s = lock.readLock()) != 0L); |
861 |
assertTrue(lock.validate(s)); |
862 |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
863 |
assertTrue(lock.validate(p)); |
864 |
assertTrue(lock.isWriteLocked()); |
865 |
lock.unlockWrite(p); |
866 |
|
867 |
assertTrue((s = lock.tryWriteLock()) != 0L); |
868 |
assertTrue(lock.validate(s)); |
869 |
assertEquals(s, lock.tryConvertToWriteLock(s)); |
870 |
assertTrue(lock.validate(s)); |
871 |
assertTrue(lock.isWriteLocked()); |
872 |
lock.unlockWrite(s); |
873 |
|
874 |
assertTrue((s = lock.tryReadLock()) != 0L); |
875 |
assertTrue(lock.validate(s)); |
876 |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
877 |
assertTrue(lock.validate(p)); |
878 |
assertTrue(lock.isWriteLocked()); |
879 |
lock.unlockWrite(p); |
880 |
|
881 |
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
882 |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
883 |
assertTrue(lock.validate(p)); |
884 |
assertTrue(lock.isWriteLocked()); |
885 |
lock.unlockWrite(p); |
886 |
|
887 |
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
888 |
assertTrue(lock.validate(s)); |
889 |
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
890 |
assertTrue(lock.validate(p)); |
891 |
assertTrue(lock.isWriteLocked()); |
892 |
lock.unlockWrite(p); |
893 |
} |
894 |
|
895 |
/** |
896 |
* asWriteLock can be locked and unlocked |
897 |
*/ |
898 |
public void testAsWriteLock() { |
899 |
StampedLock sl = new StampedLock(); |
900 |
Lock lock = sl.asWriteLock(); |
901 |
lock.lock(); |
902 |
assertFalse(lock.tryLock()); |
903 |
lock.unlock(); |
904 |
assertTrue(lock.tryLock()); |
905 |
} |
906 |
|
907 |
/** |
908 |
* asReadLock can be locked and unlocked |
909 |
*/ |
910 |
public void testAsReadLock() { |
911 |
StampedLock sl = new StampedLock(); |
912 |
Lock lock = sl.asReadLock(); |
913 |
lock.lock(); |
914 |
lock.unlock(); |
915 |
assertTrue(lock.tryLock()); |
916 |
} |
917 |
|
918 |
/** |
919 |
* asReadWriteLock.writeLock can be locked and unlocked |
920 |
*/ |
921 |
public void testAsReadWriteLockWriteLock() { |
922 |
StampedLock sl = new StampedLock(); |
923 |
Lock lock = sl.asReadWriteLock().writeLock(); |
924 |
lock.lock(); |
925 |
assertFalse(lock.tryLock()); |
926 |
lock.unlock(); |
927 |
assertTrue(lock.tryLock()); |
928 |
} |
929 |
|
930 |
/** |
931 |
* asReadWriteLock.readLock can be locked and unlocked |
932 |
*/ |
933 |
public void testAsReadWriteLockReadLock() { |
934 |
StampedLock sl = new StampedLock(); |
935 |
Lock lock = sl.asReadWriteLock().readLock(); |
936 |
lock.lock(); |
937 |
lock.unlock(); |
938 |
assertTrue(lock.tryLock()); |
939 |
} |
940 |
|
941 |
/** |
942 |
* Lock.newCondition throws UnsupportedOperationException |
943 |
*/ |
944 |
public void testLockViewsDoNotSupportConditions() { |
945 |
StampedLock sl = new StampedLock(); |
946 |
assertThrows(UnsupportedOperationException.class, |
947 |
() -> sl.asWriteLock().newCondition(), |
948 |
() -> sl.asReadLock().newCondition(), |
949 |
() -> sl.asReadWriteLock().writeLock().newCondition(), |
950 |
() -> sl.asReadWriteLock().readLock().newCondition()); |
951 |
} |
952 |
|
953 |
/** |
954 |
* Passing optimistic read stamps to unlock operations result in |
955 |
* IllegalMonitorStateException |
956 |
*/ |
957 |
public void testCannotUnlockOptimisticReadStamps() { |
958 |
Runnable[] actions = { |
959 |
() -> { |
960 |
StampedLock sl = new StampedLock(); |
961 |
long stamp = sl.tryOptimisticRead(); |
962 |
assertTrue(stamp != 0); |
963 |
sl.unlockRead(stamp); |
964 |
}, |
965 |
() -> { |
966 |
StampedLock sl = new StampedLock(); |
967 |
long stamp = sl.tryOptimisticRead(); |
968 |
sl.unlock(stamp); |
969 |
}, |
970 |
|
971 |
() -> { |
972 |
StampedLock sl = new StampedLock(); |
973 |
long stamp = sl.tryOptimisticRead(); |
974 |
sl.writeLock(); |
975 |
sl.unlock(stamp); |
976 |
}, |
977 |
() -> { |
978 |
StampedLock sl = new StampedLock(); |
979 |
long stamp = sl.tryOptimisticRead(); |
980 |
sl.readLock(); |
981 |
sl.unlockRead(stamp); |
982 |
}, |
983 |
() -> { |
984 |
StampedLock sl = new StampedLock(); |
985 |
long stamp = sl.tryOptimisticRead(); |
986 |
sl.readLock(); |
987 |
sl.unlock(stamp); |
988 |
}, |
989 |
|
990 |
() -> { |
991 |
StampedLock sl = new StampedLock(); |
992 |
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
993 |
assertTrue(stamp != 0); |
994 |
sl.writeLock(); |
995 |
sl.unlockWrite(stamp); |
996 |
}, |
997 |
() -> { |
998 |
StampedLock sl = new StampedLock(); |
999 |
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1000 |
sl.writeLock(); |
1001 |
sl.unlock(stamp); |
1002 |
}, |
1003 |
() -> { |
1004 |
StampedLock sl = new StampedLock(); |
1005 |
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1006 |
sl.readLock(); |
1007 |
sl.unlockRead(stamp); |
1008 |
}, |
1009 |
() -> { |
1010 |
StampedLock sl = new StampedLock(); |
1011 |
long stamp = sl.tryConvertToOptimisticRead(sl.writeLock()); |
1012 |
sl.readLock(); |
1013 |
sl.unlock(stamp); |
1014 |
}, |
1015 |
|
1016 |
() -> { |
1017 |
StampedLock sl = new StampedLock(); |
1018 |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1019 |
assertTrue(stamp != 0); |
1020 |
sl.writeLock(); |
1021 |
sl.unlockWrite(stamp); |
1022 |
}, |
1023 |
() -> { |
1024 |
StampedLock sl = new StampedLock(); |
1025 |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1026 |
sl.writeLock(); |
1027 |
sl.unlock(stamp); |
1028 |
}, |
1029 |
() -> { |
1030 |
StampedLock sl = new StampedLock(); |
1031 |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1032 |
sl.readLock(); |
1033 |
sl.unlockRead(stamp); |
1034 |
}, |
1035 |
() -> { |
1036 |
StampedLock sl = new StampedLock(); |
1037 |
sl.readLock(); |
1038 |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1039 |
assertTrue(stamp != 0); |
1040 |
sl.readLock(); |
1041 |
sl.unlockRead(stamp); |
1042 |
}, |
1043 |
() -> { |
1044 |
StampedLock sl = new StampedLock(); |
1045 |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1046 |
sl.readLock(); |
1047 |
sl.unlock(stamp); |
1048 |
}, |
1049 |
() -> { |
1050 |
StampedLock sl = new StampedLock(); |
1051 |
sl.readLock(); |
1052 |
long stamp = sl.tryConvertToOptimisticRead(sl.readLock()); |
1053 |
sl.readLock(); |
1054 |
sl.unlock(stamp); |
1055 |
}, |
1056 |
}; |
1057 |
|
1058 |
assertThrows(IllegalMonitorStateException.class, actions); |
1059 |
} |
1060 |
|
1061 |
static long writeLockInterruptiblyUninterrupted(StampedLock sl) { |
1062 |
try { return sl.writeLockInterruptibly(); } |
1063 |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1064 |
} |
1065 |
|
1066 |
static long tryWriteLockUninterrupted(StampedLock sl, long time, TimeUnit unit) { |
1067 |
try { return sl.tryWriteLock(time, unit); } |
1068 |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1069 |
} |
1070 |
|
1071 |
static long readLockInterruptiblyUninterrupted(StampedLock sl) { |
1072 |
try { return sl.readLockInterruptibly(); } |
1073 |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1074 |
} |
1075 |
|
1076 |
static long tryReadLockUninterrupted(StampedLock sl, long time, TimeUnit unit) { |
1077 |
try { return sl.tryReadLock(time, unit); } |
1078 |
catch (InterruptedException ex) { throw new AssertionError(ex); } |
1079 |
} |
1080 |
|
1081 |
/** |
1082 |
* Invalid write stamps result in IllegalMonitorStateException |
1083 |
*/ |
1084 |
public void testInvalidWriteStampsThrowIllegalMonitorStateException() { |
1085 |
List<Function<StampedLock, Long>> writeLockers = new ArrayList<>(); |
1086 |
writeLockers.add((sl) -> sl.writeLock()); |
1087 |
writeLockers.add((sl) -> writeLockInterruptiblyUninterrupted(sl)); |
1088 |
writeLockers.add((sl) -> tryWriteLockUninterrupted(sl, Long.MIN_VALUE, DAYS)); |
1089 |
writeLockers.add((sl) -> tryWriteLockUninterrupted(sl, 0, DAYS)); |
1090 |
|
1091 |
List<BiConsumer<StampedLock, Long>> writeUnlockers = new ArrayList<>(); |
1092 |
writeUnlockers.add((sl, stamp) -> sl.unlockWrite(stamp)); |
1093 |
writeUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockWrite())); |
1094 |
writeUnlockers.add((sl, stamp) -> sl.asWriteLock().unlock()); |
1095 |
writeUnlockers.add((sl, stamp) -> sl.unlock(stamp)); |
1096 |
|
1097 |
List<Consumer<StampedLock>> mutaters = new ArrayList<>(); |
1098 |
mutaters.add((sl) -> {}); |
1099 |
mutaters.add((sl) -> sl.readLock()); |
1100 |
for (Function<StampedLock, Long> writeLocker : writeLockers) |
1101 |
mutaters.add((sl) -> writeLocker.apply(sl)); |
1102 |
|
1103 |
for (Function<StampedLock, Long> writeLocker : writeLockers) |
1104 |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers) |
1105 |
for (Consumer<StampedLock> mutater : mutaters) { |
1106 |
final StampedLock sl = new StampedLock(); |
1107 |
final long stamp = writeLocker.apply(sl); |
1108 |
assertTrue(stamp != 0L); |
1109 |
assertThrows(IllegalMonitorStateException.class, |
1110 |
() -> sl.unlockRead(stamp)); |
1111 |
writeUnlocker.accept(sl, stamp); |
1112 |
mutater.accept(sl); |
1113 |
assertThrows(IllegalMonitorStateException.class, |
1114 |
() -> sl.unlock(stamp), |
1115 |
() -> sl.unlockRead(stamp), |
1116 |
() -> sl.unlockWrite(stamp)); |
1117 |
} |
1118 |
} |
1119 |
|
1120 |
/** |
1121 |
* Invalid read stamps result in IllegalMonitorStateException |
1122 |
*/ |
1123 |
public void testInvalidReadStampsThrowIllegalMonitorStateException() { |
1124 |
List<Function<StampedLock, Long>> readLockers = new ArrayList<>(); |
1125 |
readLockers.add((sl) -> sl.readLock()); |
1126 |
readLockers.add((sl) -> readLockInterruptiblyUninterrupted(sl)); |
1127 |
readLockers.add((sl) -> tryReadLockUninterrupted(sl, Long.MIN_VALUE, DAYS)); |
1128 |
readLockers.add((sl) -> tryReadLockUninterrupted(sl, 0, DAYS)); |
1129 |
|
1130 |
List<BiConsumer<StampedLock, Long>> readUnlockers = new ArrayList<>(); |
1131 |
readUnlockers.add((sl, stamp) -> sl.unlockRead(stamp)); |
1132 |
readUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockRead())); |
1133 |
readUnlockers.add((sl, stamp) -> sl.asReadLock().unlock()); |
1134 |
readUnlockers.add((sl, stamp) -> sl.unlock(stamp)); |
1135 |
|
1136 |
List<Function<StampedLock, Long>> writeLockers = new ArrayList<>(); |
1137 |
writeLockers.add((sl) -> sl.writeLock()); |
1138 |
writeLockers.add((sl) -> writeLockInterruptiblyUninterrupted(sl)); |
1139 |
writeLockers.add((sl) -> tryWriteLockUninterrupted(sl, Long.MIN_VALUE, DAYS)); |
1140 |
writeLockers.add((sl) -> tryWriteLockUninterrupted(sl, 0, DAYS)); |
1141 |
|
1142 |
List<BiConsumer<StampedLock, Long>> writeUnlockers = new ArrayList<>(); |
1143 |
writeUnlockers.add((sl, stamp) -> sl.unlockWrite(stamp)); |
1144 |
writeUnlockers.add((sl, stamp) -> assertTrue(sl.tryUnlockWrite())); |
1145 |
writeUnlockers.add((sl, stamp) -> sl.asWriteLock().unlock()); |
1146 |
writeUnlockers.add((sl, stamp) -> sl.unlock(stamp)); |
1147 |
|
1148 |
|
1149 |
for (Function<StampedLock, Long> readLocker : readLockers) |
1150 |
for (BiConsumer<StampedLock, Long> readUnlocker : readUnlockers) |
1151 |
for (Function<StampedLock, Long> writeLocker : writeLockers) |
1152 |
for (BiConsumer<StampedLock, Long> writeUnlocker : writeUnlockers) { |
1153 |
final StampedLock sl = new StampedLock(); |
1154 |
final long stamp = readLocker.apply(sl); |
1155 |
assertTrue(stamp != 0L); |
1156 |
assertThrows(IllegalMonitorStateException.class, |
1157 |
() -> sl.unlockWrite(stamp)); |
1158 |
readUnlocker.accept(sl, stamp); |
1159 |
assertThrows(IllegalMonitorStateException.class, |
1160 |
() -> sl.unlock(stamp), |
1161 |
() -> sl.unlockRead(stamp), |
1162 |
() -> sl.unlockWrite(stamp)); |
1163 |
final long writeStamp = writeLocker.apply(sl); |
1164 |
assertTrue(writeStamp != 0L); |
1165 |
assertTrue(writeStamp != stamp); |
1166 |
assertThrows(IllegalMonitorStateException.class, |
1167 |
() -> sl.unlock(stamp), |
1168 |
() -> sl.unlockRead(stamp), |
1169 |
() -> sl.unlockWrite(stamp)); |
1170 |
writeUnlocker.accept(sl, writeStamp); |
1171 |
assertThrows(IllegalMonitorStateException.class, |
1172 |
() -> sl.unlock(stamp), |
1173 |
() -> sl.unlockRead(stamp), |
1174 |
() -> sl.unlockWrite(stamp)); |
1175 |
} |
1176 |
} |
1177 |
|
1178 |
} |