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jsr166 |
1.1 |
/* |
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* Written by Doug Lea and Martin Buchholz |
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* with assistance from members of JCP JSR-166 Expert Group and |
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* 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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import junit.framework.*; |
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import java.util.concurrent.atomic.AtomicBoolean; |
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import java.util.concurrent.locks.Lock; |
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jsr166 |
1.2 |
import java.util.concurrent.locks.StampedLock; |
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jsr166 |
1.1 |
import java.util.concurrent.CountDownLatch; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.util.*; |
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dl |
1.4 |
import java.util.concurrent.*; |
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jsr166 |
1.1 |
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public class StampedLockTest 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(StampedLockTest.class); |
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} |
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dl |
1.4 |
/** |
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* A runnable calling writeLockInterruptibly |
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*/ |
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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(); |
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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(); |
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} |
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} |
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/** |
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* Releases write lock, checking isWriteLocked before and after |
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*/ |
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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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* 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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* 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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* 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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* 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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* 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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* 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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try { |
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long s = lock.writeLock(); |
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lock.unlockWrite(s); |
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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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* 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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try { |
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long s = lock.readLock(); |
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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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* 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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try { |
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long s = lock.readLock(); |
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lock.unlockRead(s); |
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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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* 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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* 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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try { |
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long s = lock.writeLock(); |
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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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* 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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* A stamp obtained from a successful lock operation validates |
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*/ |
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public void testValidate() { |
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try { |
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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); |
252 |
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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)); |
256 |
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lock.unlockRead(s); |
257 |
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assertTrue((s = lock.tryOptimisticRead()) != 0L); |
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} catch (InterruptedException ie) { |
259 |
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threadUnexpectedException(ie); |
260 |
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} |
261 |
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} |
262 |
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263 |
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/** |
264 |
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* A stamp obtained from an unsuccessful lock operation does not validate |
265 |
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*/ |
266 |
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public void testValidate2() { |
267 |
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try { |
268 |
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StampedLock lock = new StampedLock(); |
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long s; |
270 |
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assertTrue((s = lock.writeLock()) != 0L); |
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assertTrue(lock.validate(s)); |
272 |
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assertFalse(lock.validate(lock.tryWriteLock())); |
273 |
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assertFalse(lock.validate(lock.tryWriteLock(100L, MILLISECONDS))); |
274 |
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assertFalse(lock.validate(lock.tryReadLock())); |
275 |
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assertFalse(lock.validate(lock.tryReadLock(100L, MILLISECONDS))); |
276 |
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assertFalse(lock.validate(lock.tryOptimisticRead())); |
277 |
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lock.unlockWrite(s); |
278 |
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} catch (InterruptedException ie) { |
279 |
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threadUnexpectedException(ie); |
280 |
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} |
281 |
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} |
282 |
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283 |
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/** |
284 |
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* writeLockInterruptibly is interruptible |
285 |
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*/ |
286 |
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public void testWriteLockInterruptibly_Interruptible() { |
287 |
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final CountDownLatch running = new CountDownLatch(1); |
288 |
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final StampedLock lock = new StampedLock(); |
289 |
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long s = lock.writeLock(); |
290 |
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Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
291 |
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public void realRun() throws InterruptedException { |
292 |
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running.countDown(); |
293 |
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lock.writeLockInterruptibly(); |
294 |
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}}); |
295 |
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try { |
296 |
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running.await(); Thread.sleep(SHORT_DELAY_MS); |
297 |
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t.interrupt(); |
298 |
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awaitTermination(t); |
299 |
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releaseWriteLock(lock, s); |
300 |
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} catch (InterruptedException ie) { |
301 |
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threadUnexpectedException(ie); |
302 |
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} |
303 |
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} |
304 |
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305 |
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/** |
306 |
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* timed tryWriteLock is interruptible |
307 |
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*/ |
308 |
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public void testWriteTryLock_Interruptible() { |
309 |
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final CountDownLatch running = new CountDownLatch(1); |
310 |
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final StampedLock lock = new StampedLock(); |
311 |
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long s = lock.writeLock(); |
312 |
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Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
313 |
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public void realRun() throws InterruptedException { |
314 |
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running.countDown(); |
315 |
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lock.tryWriteLock(2 * LONG_DELAY_MS, MILLISECONDS); |
316 |
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}}); |
317 |
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try { |
318 |
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running.await(); Thread.sleep(SHORT_DELAY_MS); |
319 |
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t.interrupt(); |
320 |
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awaitTermination(t); |
321 |
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releaseWriteLock(lock, s); |
322 |
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} catch (InterruptedException ie) { |
323 |
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threadUnexpectedException(ie); |
324 |
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} |
325 |
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} |
326 |
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327 |
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/** |
328 |
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* readLockInterruptibly is interruptible |
329 |
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*/ |
330 |
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public void testReadLockInterruptibly_Interruptible() { |
331 |
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final CountDownLatch running = new CountDownLatch(1); |
332 |
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final StampedLock lock = new StampedLock(); |
333 |
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long s = lock.writeLock(); |
334 |
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Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
335 |
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public void realRun() throws InterruptedException { |
336 |
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running.countDown(); |
337 |
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lock.readLockInterruptibly(); |
338 |
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}}); |
339 |
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try { |
340 |
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running.await(); Thread.sleep(SHORT_DELAY_MS); |
341 |
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t.interrupt(); |
342 |
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awaitTermination(t); |
343 |
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releaseWriteLock(lock, s); |
344 |
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} catch (InterruptedException ie) { |
345 |
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threadUnexpectedException(ie); |
346 |
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} |
347 |
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} |
348 |
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349 |
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/** |
350 |
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* timed tryReadLock is interruptible |
351 |
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*/ |
352 |
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public void testReadTryLock_Interruptible() { |
353 |
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final CountDownLatch running = new CountDownLatch(1); |
354 |
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final StampedLock lock = new StampedLock(); |
355 |
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long s = lock.writeLock(); |
356 |
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Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
357 |
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public void realRun() throws InterruptedException { |
358 |
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running.countDown(); |
359 |
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lock.tryReadLock(2 * LONG_DELAY_MS, MILLISECONDS); |
360 |
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}}); |
361 |
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try { |
362 |
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running.await(); Thread.sleep(SHORT_DELAY_MS); |
363 |
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t.interrupt(); |
364 |
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awaitTermination(t); |
365 |
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releaseWriteLock(lock, s); |
366 |
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} catch (InterruptedException ie) { |
367 |
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threadUnexpectedException(ie); |
368 |
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} |
369 |
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} |
370 |
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|
371 |
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/** |
372 |
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* tryWriteLock on an unlocked lock succeeds |
373 |
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*/ |
374 |
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public void testWriteTryLock() { |
375 |
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final StampedLock lock = new StampedLock(); |
376 |
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long s = lock.tryWriteLock(); |
377 |
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assertTrue(s != 0L); |
378 |
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assertTrue(lock.isWriteLocked()); |
379 |
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long s2 = lock.tryWriteLock(); |
380 |
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assertEquals(s2, 0L); |
381 |
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releaseWriteLock(lock, s); |
382 |
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} |
383 |
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|
384 |
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/** |
385 |
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* tryWriteLock fails if locked |
386 |
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*/ |
387 |
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public void testWriteTryLockWhenLocked() { |
388 |
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final StampedLock lock = new StampedLock(); |
389 |
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long s = lock.writeLock(); |
390 |
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Thread t = newStartedThread(new CheckedRunnable() { |
391 |
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public void realRun() { |
392 |
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long ws = lock.tryWriteLock(); |
393 |
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assertTrue(ws == 0L); |
394 |
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}}); |
395 |
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396 |
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awaitTermination(t); |
397 |
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releaseWriteLock(lock, s); |
398 |
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} |
399 |
|
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|
400 |
|
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/** |
401 |
|
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* tryReadLock fails if write-locked |
402 |
|
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*/ |
403 |
|
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public void testReadTryLockWhenLocked() { |
404 |
|
|
final StampedLock lock = new StampedLock(); |
405 |
|
|
long s = lock.writeLock(); |
406 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
407 |
|
|
public void realRun() { |
408 |
|
|
long rs = lock.tryReadLock(); |
409 |
|
|
assertEquals(rs, 0L); |
410 |
|
|
}}); |
411 |
|
|
|
412 |
|
|
awaitTermination(t); |
413 |
|
|
releaseWriteLock(lock, s); |
414 |
|
|
} |
415 |
|
|
|
416 |
|
|
/** |
417 |
|
|
* Multiple threads can hold a read lock when not write-locked |
418 |
|
|
*/ |
419 |
|
|
public void testMultipleReadLocks() { |
420 |
|
|
final StampedLock lock = new StampedLock(); |
421 |
|
|
final long s = lock.readLock(); |
422 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
423 |
|
|
public void realRun() throws InterruptedException { |
424 |
|
|
long s2 = lock.tryReadLock(); |
425 |
|
|
assertTrue(s2 != 0L); |
426 |
|
|
lock.unlockRead(s2); |
427 |
|
|
long s3 = lock.tryReadLock(LONG_DELAY_MS, MILLISECONDS); |
428 |
|
|
assertTrue(s3 != 0L); |
429 |
|
|
lock.unlockRead(s3); |
430 |
|
|
long s4 = lock.readLock(); |
431 |
|
|
lock.unlockRead(s4); |
432 |
|
|
}}); |
433 |
|
|
|
434 |
|
|
awaitTermination(t); |
435 |
|
|
lock.unlockRead(s); |
436 |
|
|
} |
437 |
|
|
|
438 |
|
|
/** |
439 |
|
|
* A writelock succeeds only after a reading thread unlocks |
440 |
|
|
*/ |
441 |
|
|
public void testWriteAfterReadLock() { |
442 |
|
|
final CountDownLatch running = new CountDownLatch(1); |
443 |
|
|
final StampedLock lock = new StampedLock(); |
444 |
|
|
long rs = lock.readLock(); |
445 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
446 |
|
|
public void realRun() { |
447 |
|
|
running.countDown(); |
448 |
|
|
long s = lock.writeLock(); |
449 |
|
|
lock.unlockWrite(s); |
450 |
|
|
}}); |
451 |
|
|
try { |
452 |
|
|
running.await(); Thread.sleep(SHORT_DELAY_MS); |
453 |
|
|
assertFalse(lock.isWriteLocked()); |
454 |
|
|
lock.unlockRead(rs); |
455 |
|
|
awaitTermination(t); |
456 |
|
|
assertFalse(lock.isWriteLocked()); |
457 |
|
|
} catch (InterruptedException ie) { |
458 |
|
|
threadUnexpectedException(ie); |
459 |
|
|
} |
460 |
|
|
} |
461 |
|
|
|
462 |
|
|
/** |
463 |
|
|
* A writelock succeeds only after reading threads unlock |
464 |
|
|
*/ |
465 |
|
|
public void testWriteAfterMultipleReadLocks() { |
466 |
|
|
final StampedLock lock = new StampedLock(); |
467 |
|
|
long s = lock.readLock(); |
468 |
|
|
Thread t1 = newStartedThread(new CheckedRunnable() { |
469 |
|
|
public void realRun() { |
470 |
|
|
long rs = lock.readLock(); |
471 |
|
|
lock.unlockRead(rs); |
472 |
|
|
}}); |
473 |
|
|
awaitTermination(t1); |
474 |
|
|
|
475 |
|
|
Thread t2 = newStartedThread(new CheckedRunnable() { |
476 |
|
|
public void realRun() { |
477 |
|
|
long ws = lock.writeLock(); |
478 |
|
|
lock.unlockWrite(ws); |
479 |
|
|
}}); |
480 |
|
|
assertFalse(lock.isWriteLocked()); |
481 |
|
|
lock.unlockRead(s); |
482 |
|
|
awaitTermination(t2); |
483 |
|
|
assertFalse(lock.isWriteLocked()); |
484 |
|
|
} |
485 |
|
|
|
486 |
|
|
/** |
487 |
|
|
* Readlocks succeed only after a writing thread unlocks |
488 |
|
|
*/ |
489 |
|
|
public void testReadAfterWriteLock() { |
490 |
|
|
final StampedLock lock = new StampedLock(); |
491 |
|
|
final long s = lock.writeLock(); |
492 |
|
|
Thread t1 = newStartedThread(new CheckedRunnable() { |
493 |
|
|
public void realRun() { |
494 |
|
|
long rs = lock.readLock(); |
495 |
|
|
lock.unlockRead(rs); |
496 |
|
|
}}); |
497 |
|
|
Thread t2 = newStartedThread(new CheckedRunnable() { |
498 |
|
|
public void realRun() { |
499 |
|
|
long rs = lock.readLock(); |
500 |
|
|
lock.unlockRead(rs); |
501 |
|
|
}}); |
502 |
|
|
|
503 |
|
|
releaseWriteLock(lock, s); |
504 |
|
|
awaitTermination(t1); |
505 |
|
|
awaitTermination(t2); |
506 |
|
|
} |
507 |
|
|
|
508 |
|
|
/** |
509 |
|
|
* tryReadLock succeeds if readlocked but not writelocked |
510 |
|
|
*/ |
511 |
|
|
public void testTryLockWhenReadLocked() { |
512 |
|
|
final StampedLock lock = new StampedLock(); |
513 |
|
|
long s = lock.readLock(); |
514 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
515 |
|
|
public void realRun() { |
516 |
|
|
long rs = lock.tryReadLock(); |
517 |
|
|
threadAssertTrue(rs != 0L); |
518 |
|
|
lock.unlockRead(rs); |
519 |
|
|
}}); |
520 |
|
|
|
521 |
|
|
awaitTermination(t); |
522 |
|
|
lock.unlockRead(s); |
523 |
|
|
} |
524 |
|
|
|
525 |
|
|
/** |
526 |
|
|
* tryWriteLock fails when readlocked |
527 |
|
|
*/ |
528 |
|
|
public void testWriteTryLockWhenReadLocked() { |
529 |
|
|
final StampedLock lock = new StampedLock(); |
530 |
|
|
long s = lock.readLock(); |
531 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
532 |
|
|
public void realRun() { |
533 |
|
|
long ws = lock.tryWriteLock(); |
534 |
|
|
threadAssertEquals(ws, 0L); |
535 |
|
|
}}); |
536 |
|
|
|
537 |
|
|
awaitTermination(t); |
538 |
|
|
lock.unlockRead(s); |
539 |
|
|
} |
540 |
|
|
|
541 |
|
|
/** |
542 |
|
|
* timed tryWriteLock times out if locked |
543 |
|
|
*/ |
544 |
|
|
public void testWriteTryLock_Timeout() { |
545 |
|
|
final StampedLock lock = new StampedLock(); |
546 |
|
|
long s = lock.writeLock(); |
547 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
548 |
|
|
public void realRun() throws InterruptedException { |
549 |
|
|
long startTime = System.nanoTime(); |
550 |
|
|
long timeoutMillis = 10; |
551 |
|
|
long ws = lock.tryWriteLock(timeoutMillis, MILLISECONDS); |
552 |
|
|
assertEquals(ws, 0L); |
553 |
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
554 |
|
|
}}); |
555 |
|
|
|
556 |
|
|
awaitTermination(t); |
557 |
|
|
releaseWriteLock(lock, s); |
558 |
|
|
} |
559 |
|
|
|
560 |
|
|
/** |
561 |
|
|
* timed tryReadLock times out if write-locked |
562 |
|
|
*/ |
563 |
|
|
public void testReadTryLock_Timeout() { |
564 |
|
|
final StampedLock lock = new StampedLock(); |
565 |
|
|
long s = lock.writeLock(); |
566 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
567 |
|
|
public void realRun() throws InterruptedException { |
568 |
|
|
long startTime = System.nanoTime(); |
569 |
|
|
long timeoutMillis = 10; |
570 |
|
|
long rs = lock.tryReadLock(timeoutMillis, MILLISECONDS); |
571 |
|
|
assertEquals(rs, 0L); |
572 |
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
573 |
|
|
}}); |
574 |
|
|
|
575 |
|
|
awaitTermination(t); |
576 |
|
|
assertTrue(lock.isWriteLocked()); |
577 |
|
|
lock.unlockWrite(s); |
578 |
|
|
} |
579 |
|
|
|
580 |
|
|
/** |
581 |
|
|
* writeLockInterruptibly succeeds if unlocked, else is interruptible |
582 |
|
|
*/ |
583 |
|
|
public void testWriteLockInterruptibly() { |
584 |
|
|
final CountDownLatch running = new CountDownLatch(1); |
585 |
|
|
final StampedLock lock = new StampedLock(); |
586 |
|
|
long s = 0L; |
587 |
|
|
try { |
588 |
|
|
s = lock.writeLockInterruptibly(); |
589 |
|
|
} catch (InterruptedException ie) { |
590 |
|
|
threadUnexpectedException(ie); |
591 |
|
|
} |
592 |
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
593 |
|
|
public void realRun() throws InterruptedException { |
594 |
|
|
running.countDown(); |
595 |
|
|
lock.writeLockInterruptibly(); |
596 |
|
|
}}); |
597 |
|
|
|
598 |
|
|
try { |
599 |
|
|
running.await(); Thread.sleep(SHORT_DELAY_MS); |
600 |
|
|
t.interrupt(); |
601 |
|
|
assertTrue(lock.isWriteLocked()); |
602 |
|
|
awaitTermination(t); |
603 |
|
|
releaseWriteLock(lock, s); |
604 |
|
|
} catch (InterruptedException ie) { |
605 |
|
|
threadUnexpectedException(ie); |
606 |
|
|
} |
607 |
|
|
|
608 |
|
|
} |
609 |
|
|
|
610 |
|
|
/** |
611 |
|
|
* readLockInterruptibly succeeds if lock free else is interruptible |
612 |
|
|
*/ |
613 |
|
|
public void testReadLockInterruptibly() { |
614 |
|
|
final CountDownLatch running = new CountDownLatch(1); |
615 |
|
|
final StampedLock lock = new StampedLock(); |
616 |
|
|
long s = 0L; |
617 |
|
|
try { |
618 |
|
|
s = lock.readLockInterruptibly(); |
619 |
|
|
lock.unlockRead(s); |
620 |
|
|
s = lock.writeLockInterruptibly(); |
621 |
|
|
} catch (InterruptedException ie) { |
622 |
|
|
threadUnexpectedException(ie); |
623 |
|
|
} |
624 |
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
625 |
|
|
public void realRun() throws InterruptedException { |
626 |
|
|
running.countDown(); |
627 |
|
|
lock.readLockInterruptibly(); |
628 |
|
|
}}); |
629 |
|
|
try { |
630 |
|
|
running.await(); Thread.sleep(SHORT_DELAY_MS); |
631 |
|
|
t.interrupt(); |
632 |
|
|
awaitTermination(t); |
633 |
|
|
releaseWriteLock(lock, s); |
634 |
|
|
} catch (InterruptedException ie) { |
635 |
|
|
threadUnexpectedException(ie); |
636 |
|
|
} |
637 |
|
|
} |
638 |
|
|
|
639 |
|
|
/** |
640 |
|
|
* A serialized lock deserializes as unlocked |
641 |
|
|
*/ |
642 |
|
|
public void testSerialization() { |
643 |
|
|
StampedLock lock = new StampedLock(); |
644 |
|
|
lock.writeLock(); |
645 |
|
|
StampedLock clone = serialClone(lock); |
646 |
|
|
assertTrue(lock.isWriteLocked()); |
647 |
|
|
assertFalse(clone.isWriteLocked()); |
648 |
|
|
long s = clone.writeLock(); |
649 |
|
|
assertTrue(clone.isWriteLocked()); |
650 |
|
|
clone.unlockWrite(s); |
651 |
|
|
assertFalse(clone.isWriteLocked()); |
652 |
|
|
} |
653 |
dl |
1.5 |
|
654 |
dl |
1.4 |
/** |
655 |
|
|
* toString indicates current lock state |
656 |
|
|
*/ |
657 |
|
|
public void testToString() { |
658 |
|
|
StampedLock lock = new StampedLock(); |
659 |
|
|
assertTrue(lock.toString().contains("Unlocked")); |
660 |
|
|
long s = lock.writeLock(); |
661 |
|
|
assertTrue(lock.toString().contains("Write-locked")); |
662 |
|
|
lock.unlockWrite(s); |
663 |
|
|
s = lock.readLock(); |
664 |
|
|
assertTrue(lock.toString().contains("Read-locks")); |
665 |
|
|
} |
666 |
|
|
|
667 |
|
|
/** |
668 |
|
|
* tryOptimisticRead succeeds and validates if unlocked, fails if locked |
669 |
|
|
*/ |
670 |
|
|
public void testValidateOptimistic() { |
671 |
|
|
try { |
672 |
|
|
StampedLock lock = new StampedLock(); |
673 |
|
|
long s, p; |
674 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
675 |
|
|
assertTrue(lock.validate(p)); |
676 |
|
|
assertTrue((s = lock.writeLock()) != 0L); |
677 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
678 |
|
|
assertTrue(lock.validate(s)); |
679 |
|
|
lock.unlockWrite(s); |
680 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
681 |
|
|
assertTrue(lock.validate(p)); |
682 |
|
|
assertTrue((s = lock.readLock()) != 0L); |
683 |
|
|
assertTrue(lock.validate(s)); |
684 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
685 |
|
|
assertTrue(lock.validate(p)); |
686 |
|
|
lock.unlockRead(s); |
687 |
|
|
assertTrue((s = lock.tryWriteLock()) != 0L); |
688 |
|
|
assertTrue(lock.validate(s)); |
689 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
690 |
|
|
lock.unlockWrite(s); |
691 |
|
|
assertTrue((s = lock.tryReadLock()) != 0L); |
692 |
|
|
assertTrue(lock.validate(s)); |
693 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
694 |
|
|
lock.unlockRead(s); |
695 |
|
|
assertTrue(lock.validate(p)); |
696 |
|
|
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
697 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
698 |
|
|
assertTrue(lock.validate(s)); |
699 |
|
|
lock.unlockWrite(s); |
700 |
|
|
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
701 |
|
|
assertTrue(lock.validate(s)); |
702 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
703 |
|
|
lock.unlockRead(s); |
704 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
705 |
|
|
} catch (InterruptedException ie) { |
706 |
|
|
threadUnexpectedException(ie); |
707 |
|
|
} |
708 |
|
|
} |
709 |
|
|
|
710 |
|
|
/** |
711 |
|
|
* tryOptimisticRead stamp does not validate if a write lock intervenes |
712 |
|
|
*/ |
713 |
|
|
public void testValidateOptimisticWriteLocked() { |
714 |
|
|
StampedLock lock = new StampedLock(); |
715 |
|
|
long s, p; |
716 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
717 |
|
|
assertTrue((s = lock.writeLock()) != 0L); |
718 |
|
|
assertFalse(lock.validate(p)); |
719 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
720 |
|
|
assertTrue(lock.validate(s)); |
721 |
|
|
lock.unlockWrite(s); |
722 |
|
|
} |
723 |
|
|
|
724 |
|
|
/** |
725 |
|
|
* tryOptimisticRead stamp does not validate if a write lock |
726 |
|
|
* intervenes in another thread |
727 |
|
|
*/ |
728 |
|
|
public void testValidateOptimisticWriteLocked2() { |
729 |
|
|
final CountDownLatch running = new CountDownLatch(1); |
730 |
|
|
final StampedLock lock = new StampedLock(); |
731 |
|
|
long s, p; |
732 |
|
|
assertTrue((p = lock.tryOptimisticRead()) != 0L); |
733 |
|
|
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
734 |
|
|
public void realRun() throws InterruptedException { |
735 |
|
|
lock.writeLockInterruptibly(); |
736 |
|
|
running.countDown(); |
737 |
|
|
lock.writeLockInterruptibly(); |
738 |
|
|
}}); |
739 |
|
|
try { |
740 |
|
|
running.await(); |
741 |
|
|
assertFalse(lock.validate(p)); |
742 |
|
|
assertFalse((p = lock.tryOptimisticRead()) != 0L); |
743 |
|
|
t.interrupt(); |
744 |
|
|
awaitTermination(t); |
745 |
|
|
} catch (InterruptedException ie) { |
746 |
|
|
threadUnexpectedException(ie); |
747 |
|
|
} |
748 |
|
|
} |
749 |
|
|
|
750 |
|
|
/** |
751 |
|
|
* tryConvertToOptimisticRead succeeds and validates if successfully locked, |
752 |
|
|
*/ |
753 |
|
|
public void testTryConvertToOptimisticRead() { |
754 |
|
|
try { |
755 |
|
|
StampedLock lock = new StampedLock(); |
756 |
|
|
long s, p; |
757 |
|
|
s = 0L; |
758 |
|
|
assertFalse((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
759 |
|
|
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
760 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
761 |
|
|
assertTrue((s = lock.writeLock()) != 0L); |
762 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
763 |
|
|
assertTrue(lock.validate(p)); |
764 |
|
|
assertTrue((s = lock.readLock()) != 0L); |
765 |
|
|
assertTrue(lock.validate(s)); |
766 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
767 |
|
|
assertTrue(lock.validate(p)); |
768 |
|
|
assertTrue((s = lock.tryWriteLock()) != 0L); |
769 |
|
|
assertTrue(lock.validate(s)); |
770 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
771 |
|
|
assertTrue(lock.validate(p)); |
772 |
|
|
assertTrue((s = lock.tryReadLock()) != 0L); |
773 |
|
|
assertTrue(lock.validate(s)); |
774 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
775 |
|
|
assertTrue(lock.validate(p)); |
776 |
|
|
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
777 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
778 |
|
|
assertTrue(lock.validate(p)); |
779 |
|
|
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
780 |
|
|
assertTrue(lock.validate(s)); |
781 |
|
|
assertTrue((p = lock.tryConvertToOptimisticRead(s)) != 0L); |
782 |
|
|
assertTrue(lock.validate(p)); |
783 |
|
|
} catch (InterruptedException ie) { |
784 |
|
|
threadUnexpectedException(ie); |
785 |
|
|
} |
786 |
|
|
} |
787 |
|
|
|
788 |
|
|
/** |
789 |
|
|
* tryConvertToReadLock succeeds and validates if successfully locked |
790 |
|
|
* or lock free; |
791 |
|
|
*/ |
792 |
|
|
public void testTryConvertToReadLock() { |
793 |
|
|
try { |
794 |
|
|
StampedLock lock = new StampedLock(); |
795 |
|
|
long s, p; |
796 |
|
|
s = 0L; |
797 |
|
|
assertFalse((p = lock.tryConvertToReadLock(s)) != 0L); |
798 |
|
|
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
799 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
800 |
|
|
lock.unlockRead(p); |
801 |
|
|
assertTrue((s = lock.writeLock()) != 0L); |
802 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
803 |
|
|
assertTrue(lock.validate(p)); |
804 |
|
|
lock.unlockRead(p); |
805 |
|
|
assertTrue((s = lock.readLock()) != 0L); |
806 |
|
|
assertTrue(lock.validate(s)); |
807 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
808 |
|
|
assertTrue(lock.validate(p)); |
809 |
|
|
lock.unlockRead(p); |
810 |
|
|
assertTrue((s = lock.tryWriteLock()) != 0L); |
811 |
|
|
assertTrue(lock.validate(s)); |
812 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
813 |
|
|
assertTrue(lock.validate(p)); |
814 |
|
|
lock.unlockRead(p); |
815 |
|
|
assertTrue((s = lock.tryReadLock()) != 0L); |
816 |
|
|
assertTrue(lock.validate(s)); |
817 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
818 |
|
|
assertTrue(lock.validate(p)); |
819 |
|
|
lock.unlockRead(p); |
820 |
|
|
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
821 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
822 |
|
|
assertTrue(lock.validate(p)); |
823 |
|
|
lock.unlockRead(p); |
824 |
|
|
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
825 |
|
|
assertTrue(lock.validate(s)); |
826 |
|
|
assertTrue((p = lock.tryConvertToReadLock(s)) != 0L); |
827 |
|
|
assertTrue(lock.validate(p)); |
828 |
|
|
lock.unlockRead(p); |
829 |
|
|
} catch (InterruptedException ie) { |
830 |
|
|
threadUnexpectedException(ie); |
831 |
|
|
} |
832 |
|
|
} |
833 |
|
|
|
834 |
|
|
/** |
835 |
|
|
* tryConvertToWriteLock succeeds and validates if successfully locked |
836 |
|
|
* or lock free; |
837 |
|
|
*/ |
838 |
|
|
public void testTryConvertToWriteLock() { |
839 |
|
|
try { |
840 |
|
|
StampedLock lock = new StampedLock(); |
841 |
|
|
long s, p; |
842 |
|
|
s = 0L; |
843 |
|
|
assertFalse((p = lock.tryConvertToWriteLock(s)) != 0L); |
844 |
|
|
assertTrue((s = lock.tryOptimisticRead()) != 0L); |
845 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
846 |
|
|
lock.unlockWrite(p); |
847 |
|
|
assertTrue((s = lock.writeLock()) != 0L); |
848 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
849 |
|
|
assertTrue(lock.validate(p)); |
850 |
|
|
lock.unlockWrite(p); |
851 |
|
|
assertTrue((s = lock.readLock()) != 0L); |
852 |
|
|
assertTrue(lock.validate(s)); |
853 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
854 |
|
|
assertTrue(lock.validate(p)); |
855 |
|
|
lock.unlockWrite(p); |
856 |
|
|
assertTrue((s = lock.tryWriteLock()) != 0L); |
857 |
|
|
assertTrue(lock.validate(s)); |
858 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
859 |
|
|
assertTrue(lock.validate(p)); |
860 |
|
|
lock.unlockWrite(p); |
861 |
|
|
assertTrue((s = lock.tryReadLock()) != 0L); |
862 |
|
|
assertTrue(lock.validate(s)); |
863 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
864 |
|
|
assertTrue(lock.validate(p)); |
865 |
|
|
lock.unlockWrite(p); |
866 |
|
|
assertTrue((s = lock.tryWriteLock(100L, MILLISECONDS)) != 0L); |
867 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
868 |
|
|
assertTrue(lock.validate(p)); |
869 |
|
|
lock.unlockWrite(p); |
870 |
|
|
assertTrue((s = lock.tryReadLock(100L, MILLISECONDS)) != 0L); |
871 |
|
|
assertTrue(lock.validate(s)); |
872 |
|
|
assertTrue((p = lock.tryConvertToWriteLock(s)) != 0L); |
873 |
|
|
assertTrue(lock.validate(p)); |
874 |
|
|
lock.unlockWrite(p); |
875 |
|
|
} catch (InterruptedException ie) { |
876 |
|
|
threadUnexpectedException(ie); |
877 |
|
|
} |
878 |
|
|
} |
879 |
|
|
|
880 |
|
|
/** |
881 |
|
|
* asWriteLock can be locked and unlocked |
882 |
|
|
*/ |
883 |
|
|
public void testAsWriteLock() { |
884 |
|
|
StampedLock sl = new StampedLock(); |
885 |
|
|
Lock lock = sl.asWriteLock(); |
886 |
|
|
lock.lock(); |
887 |
|
|
assertFalse(lock.tryLock()); |
888 |
|
|
lock.unlock(); |
889 |
|
|
assertTrue(lock.tryLock()); |
890 |
|
|
} |
891 |
|
|
|
892 |
|
|
/** |
893 |
|
|
* asReadLock can be locked and unlocked |
894 |
|
|
*/ |
895 |
|
|
public void testAsReadLock() { |
896 |
|
|
StampedLock sl = new StampedLock(); |
897 |
|
|
Lock lock = sl.asReadLock(); |
898 |
|
|
lock.lock(); |
899 |
|
|
lock.unlock(); |
900 |
|
|
assertTrue(lock.tryLock()); |
901 |
|
|
} |
902 |
|
|
|
903 |
|
|
/** |
904 |
|
|
* asReadWriteLock.writeLock can be locked and unlocked |
905 |
|
|
*/ |
906 |
|
|
public void testAsReadWriteLockWriteLock() { |
907 |
|
|
StampedLock sl = new StampedLock(); |
908 |
|
|
Lock lock = sl.asReadWriteLock().writeLock(); |
909 |
|
|
lock.lock(); |
910 |
|
|
assertFalse(lock.tryLock()); |
911 |
|
|
lock.unlock(); |
912 |
|
|
assertTrue(lock.tryLock()); |
913 |
|
|
} |
914 |
|
|
|
915 |
|
|
/** |
916 |
|
|
* asReadWriteLock.readLock can be locked and unlocked |
917 |
|
|
*/ |
918 |
|
|
public void testAsReadWriteLockReadLock() { |
919 |
|
|
StampedLock sl = new StampedLock(); |
920 |
|
|
Lock lock = sl.asReadWriteLock().readLock(); |
921 |
|
|
lock.lock(); |
922 |
|
|
lock.unlock(); |
923 |
|
|
assertTrue(lock.tryLock()); |
924 |
|
|
} |
925 |
jsr166 |
1.1 |
|
926 |
|
|
} |