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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
4 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
7 |
*/ |
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|
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import junit.framework.*; |
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import java.util.concurrent.locks.*; |
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import java.util.concurrent.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.util.*; |
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import java.io.*; |
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|
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public class ReentrantLockTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(ReentrantLockTest.class); |
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} |
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|
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/** |
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* A runnable calling lockInterruptibly |
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*/ |
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class InterruptibleLockRunnable extends CheckedRunnable { |
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final ReentrantLock lock; |
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InterruptibleLockRunnable(ReentrantLock l) { lock = l; } |
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public void realRun() throws InterruptedException { |
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lock.lockInterruptibly(); |
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} |
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} |
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|
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/** |
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* A runnable calling lockInterruptibly that expects to be |
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* interrupted |
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*/ |
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class InterruptedLockRunnable extends CheckedInterruptedRunnable { |
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final ReentrantLock lock; |
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InterruptedLockRunnable(ReentrantLock l) { lock = l; } |
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public void realRun() throws InterruptedException { |
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lock.lockInterruptibly(); |
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} |
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} |
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|
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/** |
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* Subclass to expose protected methods |
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*/ |
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static class PublicReentrantLock extends ReentrantLock { |
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PublicReentrantLock() { super(); } |
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PublicReentrantLock(boolean fair) { super(fair); } |
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public Thread getOwner() { |
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return super.getOwner(); |
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} |
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public Collection<Thread> getQueuedThreads() { |
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return super.getQueuedThreads(); |
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} |
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public Collection<Thread> getWaitingThreads(Condition c) { |
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return super.getWaitingThreads(c); |
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} |
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} |
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|
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/** |
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* Releases write lock, checking that it had a hold count of 1. |
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*/ |
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void releaseLock(PublicReentrantLock lock) { |
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assertLockedByMoi(lock); |
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lock.unlock(); |
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assertFalse(lock.isHeldByCurrentThread()); |
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assertNotLocked(lock); |
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} |
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|
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/** |
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* Spin-waits until lock.hasQueuedThread(t) becomes true. |
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*/ |
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void waitForQueuedThread(PublicReentrantLock lock, Thread t) { |
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long startTime = System.nanoTime(); |
79 |
while (!lock.hasQueuedThread(t)) { |
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if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
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throw new AssertionFailedError("timed out"); |
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Thread.yield(); |
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} |
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assertTrue(t.isAlive()); |
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assertTrue(lock.getOwner() != t); |
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} |
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|
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/** |
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* Checks that lock is not locked. |
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*/ |
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void assertNotLocked(PublicReentrantLock lock) { |
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assertFalse(lock.isLocked()); |
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assertFalse(lock.isHeldByCurrentThread()); |
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assertNull(lock.getOwner()); |
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assertEquals(0, lock.getHoldCount()); |
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} |
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|
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/** |
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* Checks that lock is locked by the given thread. |
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*/ |
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void assertLockedBy(PublicReentrantLock lock, Thread t) { |
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assertTrue(lock.isLocked()); |
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assertSame(t, lock.getOwner()); |
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assertEquals(t == Thread.currentThread(), |
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lock.isHeldByCurrentThread()); |
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assertEquals(t == Thread.currentThread(), |
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lock.getHoldCount() > 0); |
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} |
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|
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/** |
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* Checks that lock is locked by the current thread. |
112 |
*/ |
113 |
void assertLockedByMoi(PublicReentrantLock lock) { |
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assertLockedBy(lock, Thread.currentThread()); |
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} |
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|
117 |
/** |
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* Checks that condition c has no waiters. |
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*/ |
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void assertHasNoWaiters(PublicReentrantLock lock, Condition c) { |
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assertHasWaiters(lock, c, new Thread[] {}); |
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} |
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|
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/** |
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* Checks that condition c has exactly the given waiter threads. |
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*/ |
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void assertHasWaiters(PublicReentrantLock lock, Condition c, |
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Thread... threads) { |
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lock.lock(); |
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assertEquals(threads.length > 0, lock.hasWaiters(c)); |
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assertEquals(threads.length, lock.getWaitQueueLength(c)); |
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assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty()); |
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assertEquals(threads.length, lock.getWaitingThreads(c).size()); |
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assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)), |
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new HashSet<Thread>(Arrays.asList(threads))); |
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lock.unlock(); |
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} |
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|
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enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }; |
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|
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/** |
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* Awaits condition using the specified AwaitMethod. |
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*/ |
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void await(Condition c, AwaitMethod awaitMethod) |
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throws InterruptedException { |
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long timeoutMillis = 2 * LONG_DELAY_MS; |
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switch (awaitMethod) { |
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case await: |
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c.await(); |
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break; |
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case awaitTimed: |
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assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
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break; |
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case awaitNanos: |
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long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
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long nanosRemaining = c.awaitNanos(nanosTimeout); |
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assertTrue(nanosRemaining > 0); |
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break; |
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case awaitUntil: |
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assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
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break; |
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} |
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} |
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|
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/** |
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* Constructor sets given fairness, and is in unlocked state |
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*/ |
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public void testConstructor() { |
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PublicReentrantLock lock; |
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|
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lock = new PublicReentrantLock(); |
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assertFalse(lock.isFair()); |
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assertNotLocked(lock); |
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|
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lock = new PublicReentrantLock(true); |
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assertTrue(lock.isFair()); |
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assertNotLocked(lock); |
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|
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lock = new PublicReentrantLock(false); |
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assertFalse(lock.isFair()); |
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assertNotLocked(lock); |
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} |
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|
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/** |
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* locking an unlocked lock succeeds |
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*/ |
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public void testLock() { testLock(false); } |
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public void testLock_fair() { testLock(true); } |
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public void testLock(boolean fair) { |
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PublicReentrantLock lock = new PublicReentrantLock(fair); |
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lock.lock(); |
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assertLockedByMoi(lock); |
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releaseLock(lock); |
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} |
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|
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/** |
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* Unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testUnlock_IMSE() { testUnlock_IMSE(false); } |
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public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); } |
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public void testUnlock_IMSE(boolean fair) { |
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ReentrantLock lock = new ReentrantLock(fair); |
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try { |
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lock.unlock(); |
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shouldThrow(); |
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} catch (IllegalMonitorStateException success) {} |
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} |
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|
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/** |
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* tryLock on an unlocked lock succeeds |
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*/ |
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public void testTryLock() { testTryLock(false); } |
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public void testTryLock_fair() { testTryLock(true); } |
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public void testTryLock(boolean fair) { |
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PublicReentrantLock lock = new PublicReentrantLock(fair); |
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assertTrue(lock.tryLock()); |
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assertLockedByMoi(lock); |
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assertTrue(lock.tryLock()); |
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assertLockedByMoi(lock); |
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lock.unlock(); |
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releaseLock(lock); |
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} |
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|
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/** |
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* hasQueuedThreads reports whether there are waiting threads |
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*/ |
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public void testHasQueuedThreads() { testHasQueuedThreads(false); } |
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public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); } |
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public void testHasQueuedThreads(boolean fair) { |
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final PublicReentrantLock lock = new PublicReentrantLock(fair); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertFalse(lock.hasQueuedThreads()); |
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lock.lock(); |
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assertFalse(lock.hasQueuedThreads()); |
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t1.start(); |
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waitForQueuedThread(lock, t1); |
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assertTrue(lock.hasQueuedThreads()); |
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t2.start(); |
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waitForQueuedThread(lock, t2); |
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assertTrue(lock.hasQueuedThreads()); |
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t1.interrupt(); |
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awaitTermination(t1); |
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assertTrue(lock.hasQueuedThreads()); |
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lock.unlock(); |
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awaitTermination(t2); |
247 |
assertFalse(lock.hasQueuedThreads()); |
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} |
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|
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/** |
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* getQueueLength reports number of waiting threads |
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*/ |
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public void testGetQueueLength() { testGetQueueLength(false); } |
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public void testGetQueueLength_fair() { testGetQueueLength(true); } |
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public void testGetQueueLength(boolean fair) { |
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final PublicReentrantLock lock = new PublicReentrantLock(fair); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertEquals(0, lock.getQueueLength()); |
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lock.lock(); |
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t1.start(); |
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waitForQueuedThread(lock, t1); |
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assertEquals(1, lock.getQueueLength()); |
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t2.start(); |
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waitForQueuedThread(lock, t2); |
266 |
assertEquals(2, lock.getQueueLength()); |
267 |
t1.interrupt(); |
268 |
awaitTermination(t1); |
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assertEquals(1, lock.getQueueLength()); |
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lock.unlock(); |
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awaitTermination(t2); |
272 |
assertEquals(0, lock.getQueueLength()); |
273 |
} |
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|
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/** |
276 |
* hasQueuedThread(null) throws NPE |
277 |
*/ |
278 |
public void testHasQueuedThreadNPE() { testHasQueuedThreadNPE(false); } |
279 |
public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); } |
280 |
public void testHasQueuedThreadNPE(boolean fair) { |
281 |
final ReentrantLock lock = new ReentrantLock(fair); |
282 |
try { |
283 |
lock.hasQueuedThread(null); |
284 |
shouldThrow(); |
285 |
} catch (NullPointerException success) {} |
286 |
} |
287 |
|
288 |
/** |
289 |
* hasQueuedThread reports whether a thread is queued |
290 |
*/ |
291 |
public void testHasQueuedThread() { testHasQueuedThread(false); } |
292 |
public void testHasQueuedThread_fair() { testHasQueuedThread(true); } |
293 |
public void testHasQueuedThread(boolean fair) { |
294 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
295 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
297 |
assertFalse(lock.hasQueuedThread(t1)); |
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assertFalse(lock.hasQueuedThread(t2)); |
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lock.lock(); |
300 |
t1.start(); |
301 |
waitForQueuedThread(lock, t1); |
302 |
assertTrue(lock.hasQueuedThread(t1)); |
303 |
assertFalse(lock.hasQueuedThread(t2)); |
304 |
t2.start(); |
305 |
waitForQueuedThread(lock, t2); |
306 |
assertTrue(lock.hasQueuedThread(t1)); |
307 |
assertTrue(lock.hasQueuedThread(t2)); |
308 |
t1.interrupt(); |
309 |
awaitTermination(t1); |
310 |
assertFalse(lock.hasQueuedThread(t1)); |
311 |
assertTrue(lock.hasQueuedThread(t2)); |
312 |
lock.unlock(); |
313 |
awaitTermination(t2); |
314 |
assertFalse(lock.hasQueuedThread(t1)); |
315 |
assertFalse(lock.hasQueuedThread(t2)); |
316 |
} |
317 |
|
318 |
/** |
319 |
* getQueuedThreads includes waiting threads |
320 |
*/ |
321 |
public void testGetQueuedThreads() { testGetQueuedThreads(false); } |
322 |
public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); } |
323 |
public void testGetQueuedThreads(boolean fair) { |
324 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
325 |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
326 |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
327 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
328 |
lock.lock(); |
329 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
330 |
t1.start(); |
331 |
waitForQueuedThread(lock, t1); |
332 |
assertEquals(1, lock.getQueuedThreads().size()); |
333 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
334 |
t2.start(); |
335 |
waitForQueuedThread(lock, t2); |
336 |
assertEquals(2, lock.getQueuedThreads().size()); |
337 |
assertTrue(lock.getQueuedThreads().contains(t1)); |
338 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
339 |
t1.interrupt(); |
340 |
awaitTermination(t1); |
341 |
assertFalse(lock.getQueuedThreads().contains(t1)); |
342 |
assertTrue(lock.getQueuedThreads().contains(t2)); |
343 |
assertEquals(1, lock.getQueuedThreads().size()); |
344 |
lock.unlock(); |
345 |
awaitTermination(t2); |
346 |
assertTrue(lock.getQueuedThreads().isEmpty()); |
347 |
} |
348 |
|
349 |
/** |
350 |
* timed tryLock is interruptible |
351 |
*/ |
352 |
public void testTryLock_Interruptible() { testTryLock_Interruptible(false); } |
353 |
public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); } |
354 |
public void testTryLock_Interruptible(boolean fair) { |
355 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
356 |
lock.lock(); |
357 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
358 |
public void realRun() throws InterruptedException { |
359 |
lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS); |
360 |
}}); |
361 |
|
362 |
waitForQueuedThread(lock, t); |
363 |
t.interrupt(); |
364 |
awaitTermination(t); |
365 |
releaseLock(lock); |
366 |
} |
367 |
|
368 |
/** |
369 |
* tryLock on a locked lock fails |
370 |
*/ |
371 |
public void testTryLockWhenLocked() { testTryLockWhenLocked(false); } |
372 |
public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); } |
373 |
public void testTryLockWhenLocked(boolean fair) { |
374 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
375 |
lock.lock(); |
376 |
Thread t = newStartedThread(new CheckedRunnable() { |
377 |
public void realRun() { |
378 |
assertFalse(lock.tryLock()); |
379 |
}}); |
380 |
|
381 |
awaitTermination(t); |
382 |
releaseLock(lock); |
383 |
} |
384 |
|
385 |
/** |
386 |
* Timed tryLock on a locked lock times out |
387 |
*/ |
388 |
public void testTryLock_Timeout() { testTryLock_Timeout(false); } |
389 |
public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); } |
390 |
public void testTryLock_Timeout(boolean fair) { |
391 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
392 |
lock.lock(); |
393 |
Thread t = newStartedThread(new CheckedRunnable() { |
394 |
public void realRun() throws InterruptedException { |
395 |
long startTime = System.nanoTime(); |
396 |
long timeoutMillis = 10; |
397 |
assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS)); |
398 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
399 |
}}); |
400 |
|
401 |
awaitTermination(t); |
402 |
releaseLock(lock); |
403 |
} |
404 |
|
405 |
/** |
406 |
* getHoldCount returns number of recursive holds |
407 |
*/ |
408 |
public void testGetHoldCount() { testGetHoldCount(false); } |
409 |
public void testGetHoldCount_fair() { testGetHoldCount(true); } |
410 |
public void testGetHoldCount(boolean fair) { |
411 |
ReentrantLock lock = new ReentrantLock(fair); |
412 |
for (int i = 1; i <= SIZE; i++) { |
413 |
lock.lock(); |
414 |
assertEquals(i, lock.getHoldCount()); |
415 |
} |
416 |
for (int i = SIZE; i > 0; i--) { |
417 |
lock.unlock(); |
418 |
assertEquals(i-1, lock.getHoldCount()); |
419 |
} |
420 |
} |
421 |
|
422 |
/** |
423 |
* isLocked is true when locked and false when not |
424 |
*/ |
425 |
public void testIsLocked() { testIsLocked(false); } |
426 |
public void testIsLocked_fair() { testIsLocked(true); } |
427 |
public void testIsLocked(boolean fair) { |
428 |
try { |
429 |
final ReentrantLock lock = new ReentrantLock(fair); |
430 |
assertFalse(lock.isLocked()); |
431 |
lock.lock(); |
432 |
assertTrue(lock.isLocked()); |
433 |
lock.lock(); |
434 |
assertTrue(lock.isLocked()); |
435 |
lock.unlock(); |
436 |
assertTrue(lock.isLocked()); |
437 |
lock.unlock(); |
438 |
assertFalse(lock.isLocked()); |
439 |
final CyclicBarrier barrier = new CyclicBarrier(2); |
440 |
Thread t = newStartedThread(new CheckedRunnable() { |
441 |
public void realRun() throws Exception { |
442 |
lock.lock(); |
443 |
assertTrue(lock.isLocked()); |
444 |
barrier.await(); |
445 |
barrier.await(); |
446 |
lock.unlock(); |
447 |
}}); |
448 |
|
449 |
barrier.await(); |
450 |
assertTrue(lock.isLocked()); |
451 |
barrier.await(); |
452 |
awaitTermination(t); |
453 |
assertFalse(lock.isLocked()); |
454 |
} catch (Exception e) { |
455 |
threadUnexpectedException(e); |
456 |
} |
457 |
} |
458 |
|
459 |
/** |
460 |
* lockInterruptibly succeeds when unlocked, else is interruptible |
461 |
*/ |
462 |
public void testLockInterruptibly() { testLockInterruptibly(false); } |
463 |
public void testLockInterruptibly_fair() { testLockInterruptibly(true); } |
464 |
public void testLockInterruptibly(boolean fair) { |
465 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
466 |
try { |
467 |
lock.lockInterruptibly(); |
468 |
} catch (InterruptedException ie) { |
469 |
threadUnexpectedException(ie); |
470 |
} |
471 |
assertLockedByMoi(lock); |
472 |
Thread t = newStartedThread(new InterruptedLockRunnable(lock)); |
473 |
waitForQueuedThread(lock, t); |
474 |
t.interrupt(); |
475 |
assertTrue(lock.isLocked()); |
476 |
assertTrue(lock.isHeldByCurrentThread()); |
477 |
awaitTermination(t); |
478 |
releaseLock(lock); |
479 |
} |
480 |
|
481 |
/** |
482 |
* Calling await without holding lock throws IllegalMonitorStateException |
483 |
*/ |
484 |
public void testAwait_IMSE() { testAwait_IMSE(false); } |
485 |
public void testAwait_IMSE_fair() { testAwait_IMSE(true); } |
486 |
public void testAwait_IMSE(boolean fair) { |
487 |
final ReentrantLock lock = new ReentrantLock(fair); |
488 |
final Condition c = lock.newCondition(); |
489 |
for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
490 |
long startTime = System.nanoTime(); |
491 |
try { |
492 |
await(c, awaitMethod); |
493 |
shouldThrow(); |
494 |
} catch (IllegalMonitorStateException success) { |
495 |
} catch (InterruptedException e) { threadUnexpectedException(e); } |
496 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
497 |
} |
498 |
} |
499 |
|
500 |
/** |
501 |
* Calling signal without holding lock throws IllegalMonitorStateException |
502 |
*/ |
503 |
public void testSignal_IMSE() { testSignal_IMSE(false); } |
504 |
public void testSignal_IMSE_fair() { testSignal_IMSE(true); } |
505 |
public void testSignal_IMSE(boolean fair) { |
506 |
final ReentrantLock lock = new ReentrantLock(fair); |
507 |
final Condition c = lock.newCondition(); |
508 |
try { |
509 |
c.signal(); |
510 |
shouldThrow(); |
511 |
} catch (IllegalMonitorStateException success) {} |
512 |
} |
513 |
|
514 |
/** |
515 |
* awaitNanos without a signal times out |
516 |
*/ |
517 |
public void testAwaitNanos_Timeout() { testAwaitNanos_Timeout(false); } |
518 |
public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); } |
519 |
public void testAwaitNanos_Timeout(boolean fair) { |
520 |
try { |
521 |
final ReentrantLock lock = new ReentrantLock(fair); |
522 |
final Condition c = lock.newCondition(); |
523 |
lock.lock(); |
524 |
long startTime = System.nanoTime(); |
525 |
long timeoutMillis = 10; |
526 |
long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
527 |
long nanosRemaining = c.awaitNanos(timeoutNanos); |
528 |
assertTrue(nanosRemaining <= 0); |
529 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
530 |
lock.unlock(); |
531 |
} catch (InterruptedException e) { |
532 |
threadUnexpectedException(e); |
533 |
} |
534 |
} |
535 |
|
536 |
/** |
537 |
* timed await without a signal times out |
538 |
*/ |
539 |
public void testAwait_Timeout() { testAwait_Timeout(false); } |
540 |
public void testAwait_Timeout_fair() { testAwait_Timeout(true); } |
541 |
public void testAwait_Timeout(boolean fair) { |
542 |
try { |
543 |
final ReentrantLock lock = new ReentrantLock(fair); |
544 |
final Condition c = lock.newCondition(); |
545 |
lock.lock(); |
546 |
long startTime = System.nanoTime(); |
547 |
long timeoutMillis = 10; |
548 |
assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
549 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
550 |
lock.unlock(); |
551 |
} catch (InterruptedException e) { |
552 |
threadUnexpectedException(e); |
553 |
} |
554 |
} |
555 |
|
556 |
/** |
557 |
* awaitUntil without a signal times out |
558 |
*/ |
559 |
public void testAwaitUntil_Timeout() { testAwaitUntil_Timeout(false); } |
560 |
public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); } |
561 |
public void testAwaitUntil_Timeout(boolean fair) { |
562 |
try { |
563 |
final ReentrantLock lock = new ReentrantLock(fair); |
564 |
final Condition c = lock.newCondition(); |
565 |
lock.lock(); |
566 |
long startTime = System.nanoTime(); |
567 |
long timeoutMillis = 10; |
568 |
java.util.Date d = new java.util.Date(); |
569 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis))); |
570 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
571 |
lock.unlock(); |
572 |
} catch (InterruptedException e) { |
573 |
threadUnexpectedException(e); |
574 |
} |
575 |
} |
576 |
|
577 |
/** |
578 |
* await returns when signalled |
579 |
*/ |
580 |
public void testAwait() { testAwait(false); } |
581 |
public void testAwait_fair() { testAwait(true); } |
582 |
public void testAwait(boolean fair) { |
583 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
584 |
final Condition c = lock.newCondition(); |
585 |
final CountDownLatch locked = new CountDownLatch(1); |
586 |
Thread t = newStartedThread(new CheckedRunnable() { |
587 |
public void realRun() throws InterruptedException { |
588 |
lock.lock(); |
589 |
locked.countDown(); |
590 |
c.await(); |
591 |
lock.unlock(); |
592 |
}}); |
593 |
|
594 |
await(locked); |
595 |
lock.lock(); |
596 |
assertHasWaiters(lock, c, t); |
597 |
c.signal(); |
598 |
assertHasNoWaiters(lock, c); |
599 |
assertTrue(t.isAlive()); |
600 |
lock.unlock(); |
601 |
awaitTermination(t); |
602 |
} |
603 |
|
604 |
/** |
605 |
* hasWaiters throws NPE if null |
606 |
*/ |
607 |
public void testHasWaitersNPE() { testHasWaitersNPE(false); } |
608 |
public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); } |
609 |
public void testHasWaitersNPE(boolean fair) { |
610 |
final ReentrantLock lock = new ReentrantLock(fair); |
611 |
try { |
612 |
lock.hasWaiters(null); |
613 |
shouldThrow(); |
614 |
} catch (NullPointerException success) {} |
615 |
} |
616 |
|
617 |
/** |
618 |
* getWaitQueueLength throws NPE if null |
619 |
*/ |
620 |
public void testGetWaitQueueLengthNPE() { testGetWaitQueueLengthNPE(false); } |
621 |
public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); } |
622 |
public void testGetWaitQueueLengthNPE(boolean fair) { |
623 |
final ReentrantLock lock = new ReentrantLock(fair); |
624 |
try { |
625 |
lock.getWaitQueueLength(null); |
626 |
shouldThrow(); |
627 |
} catch (NullPointerException success) {} |
628 |
} |
629 |
|
630 |
/** |
631 |
* getWaitingThreads throws NPE if null |
632 |
*/ |
633 |
public void testGetWaitingThreadsNPE() { testGetWaitingThreadsNPE(false); } |
634 |
public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); } |
635 |
public void testGetWaitingThreadsNPE(boolean fair) { |
636 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
637 |
try { |
638 |
lock.getWaitingThreads(null); |
639 |
shouldThrow(); |
640 |
} catch (NullPointerException success) {} |
641 |
} |
642 |
|
643 |
/** |
644 |
* hasWaiters throws IllegalArgumentException if not owned |
645 |
*/ |
646 |
public void testHasWaitersIAE() { testHasWaitersIAE(false); } |
647 |
public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); } |
648 |
public void testHasWaitersIAE(boolean fair) { |
649 |
final ReentrantLock lock = new ReentrantLock(fair); |
650 |
final Condition c = lock.newCondition(); |
651 |
final ReentrantLock lock2 = new ReentrantLock(fair); |
652 |
try { |
653 |
lock2.hasWaiters(c); |
654 |
shouldThrow(); |
655 |
} catch (IllegalArgumentException success) {} |
656 |
} |
657 |
|
658 |
/** |
659 |
* hasWaiters throws IllegalMonitorStateException if not locked |
660 |
*/ |
661 |
public void testHasWaitersIMSE() { testHasWaitersIMSE(false); } |
662 |
public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); } |
663 |
public void testHasWaitersIMSE(boolean fair) { |
664 |
final ReentrantLock lock = new ReentrantLock(fair); |
665 |
final Condition c = lock.newCondition(); |
666 |
try { |
667 |
lock.hasWaiters(c); |
668 |
shouldThrow(); |
669 |
} catch (IllegalMonitorStateException success) {} |
670 |
} |
671 |
|
672 |
/** |
673 |
* getWaitQueueLength throws IllegalArgumentException if not owned |
674 |
*/ |
675 |
public void testGetWaitQueueLengthIAE() { testGetWaitQueueLengthIAE(false); } |
676 |
public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); } |
677 |
public void testGetWaitQueueLengthIAE(boolean fair) { |
678 |
final ReentrantLock lock = new ReentrantLock(fair); |
679 |
final Condition c = lock.newCondition(); |
680 |
final ReentrantLock lock2 = new ReentrantLock(fair); |
681 |
try { |
682 |
lock2.getWaitQueueLength(c); |
683 |
shouldThrow(); |
684 |
} catch (IllegalArgumentException success) {} |
685 |
} |
686 |
|
687 |
/** |
688 |
* getWaitQueueLength throws IllegalMonitorStateException if not locked |
689 |
*/ |
690 |
public void testGetWaitQueueLengthIMSE() { testGetWaitQueueLengthIMSE(false); } |
691 |
public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); } |
692 |
public void testGetWaitQueueLengthIMSE(boolean fair) { |
693 |
final ReentrantLock lock = new ReentrantLock(fair); |
694 |
final Condition c = lock.newCondition(); |
695 |
try { |
696 |
lock.getWaitQueueLength(c); |
697 |
shouldThrow(); |
698 |
} catch (IllegalMonitorStateException success) {} |
699 |
} |
700 |
|
701 |
/** |
702 |
* getWaitingThreads throws IllegalArgumentException if not owned |
703 |
*/ |
704 |
public void testGetWaitingThreadsIAE() { testGetWaitingThreadsIAE(false); } |
705 |
public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); } |
706 |
public void testGetWaitingThreadsIAE(boolean fair) { |
707 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
708 |
final Condition c = lock.newCondition(); |
709 |
final PublicReentrantLock lock2 = new PublicReentrantLock(fair); |
710 |
try { |
711 |
lock2.getWaitingThreads(c); |
712 |
shouldThrow(); |
713 |
} catch (IllegalArgumentException success) {} |
714 |
} |
715 |
|
716 |
/** |
717 |
* getWaitingThreads throws IllegalMonitorStateException if not locked |
718 |
*/ |
719 |
public void testGetWaitingThreadsIMSE() { testGetWaitingThreadsIMSE(false); } |
720 |
public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); } |
721 |
public void testGetWaitingThreadsIMSE(boolean fair) { |
722 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
723 |
final Condition c = lock.newCondition(); |
724 |
try { |
725 |
lock.getWaitingThreads(c); |
726 |
shouldThrow(); |
727 |
} catch (IllegalMonitorStateException success) {} |
728 |
} |
729 |
|
730 |
/** |
731 |
* hasWaiters returns true when a thread is waiting, else false |
732 |
*/ |
733 |
public void testHasWaiters() { testHasWaiters(false); } |
734 |
public void testHasWaiters_fair() { testHasWaiters(true); } |
735 |
public void testHasWaiters(boolean fair) { |
736 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
737 |
final Condition c = lock.newCondition(); |
738 |
final CountDownLatch locked = new CountDownLatch(1); |
739 |
Thread t = newStartedThread(new CheckedRunnable() { |
740 |
public void realRun() throws InterruptedException { |
741 |
lock.lock(); |
742 |
assertHasNoWaiters(lock, c); |
743 |
assertFalse(lock.hasWaiters(c)); |
744 |
locked.countDown(); |
745 |
c.await(); |
746 |
assertHasNoWaiters(lock, c); |
747 |
assertFalse(lock.hasWaiters(c)); |
748 |
lock.unlock(); |
749 |
}}); |
750 |
|
751 |
await(locked); |
752 |
lock.lock(); |
753 |
assertHasWaiters(lock, c, t); |
754 |
assertTrue(lock.hasWaiters(c)); |
755 |
c.signal(); |
756 |
assertHasNoWaiters(lock, c); |
757 |
assertFalse(lock.hasWaiters(c)); |
758 |
lock.unlock(); |
759 |
awaitTermination(t); |
760 |
assertHasNoWaiters(lock, c); |
761 |
} |
762 |
|
763 |
/** |
764 |
* getWaitQueueLength returns number of waiting threads |
765 |
*/ |
766 |
public void testGetWaitQueueLength() { testGetWaitQueueLength(false); } |
767 |
public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); } |
768 |
public void testGetWaitQueueLength(boolean fair) { |
769 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
770 |
final Condition c = lock.newCondition(); |
771 |
final CountDownLatch locked1 = new CountDownLatch(1); |
772 |
final CountDownLatch locked2 = new CountDownLatch(1); |
773 |
Thread t1 = new Thread(new CheckedRunnable() { |
774 |
public void realRun() throws InterruptedException { |
775 |
lock.lock(); |
776 |
assertFalse(lock.hasWaiters(c)); |
777 |
assertEquals(0, lock.getWaitQueueLength(c)); |
778 |
locked1.countDown(); |
779 |
c.await(); |
780 |
lock.unlock(); |
781 |
}}); |
782 |
|
783 |
Thread t2 = new Thread(new CheckedRunnable() { |
784 |
public void realRun() throws InterruptedException { |
785 |
lock.lock(); |
786 |
assertTrue(lock.hasWaiters(c)); |
787 |
assertEquals(1, lock.getWaitQueueLength(c)); |
788 |
locked2.countDown(); |
789 |
c.await(); |
790 |
lock.unlock(); |
791 |
}}); |
792 |
|
793 |
lock.lock(); |
794 |
assertEquals(0, lock.getWaitQueueLength(c)); |
795 |
lock.unlock(); |
796 |
|
797 |
t1.start(); |
798 |
await(locked1); |
799 |
|
800 |
lock.lock(); |
801 |
assertHasWaiters(lock, c, t1); |
802 |
assertEquals(1, lock.getWaitQueueLength(c)); |
803 |
lock.unlock(); |
804 |
|
805 |
t2.start(); |
806 |
await(locked2); |
807 |
|
808 |
lock.lock(); |
809 |
assertHasWaiters(lock, c, t1, t2); |
810 |
assertEquals(2, lock.getWaitQueueLength(c)); |
811 |
c.signalAll(); |
812 |
assertHasNoWaiters(lock, c); |
813 |
lock.unlock(); |
814 |
|
815 |
awaitTermination(t1); |
816 |
awaitTermination(t2); |
817 |
|
818 |
assertHasNoWaiters(lock, c); |
819 |
} |
820 |
|
821 |
/** |
822 |
* getWaitingThreads returns only and all waiting threads |
823 |
*/ |
824 |
public void testGetWaitingThreads() { testGetWaitingThreads(false); } |
825 |
public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); } |
826 |
public void testGetWaitingThreads(boolean fair) { |
827 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
828 |
final Condition c = lock.newCondition(); |
829 |
final CountDownLatch locked1 = new CountDownLatch(1); |
830 |
final CountDownLatch locked2 = new CountDownLatch(1); |
831 |
Thread t1 = new Thread(new CheckedRunnable() { |
832 |
public void realRun() throws InterruptedException { |
833 |
lock.lock(); |
834 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
835 |
locked1.countDown(); |
836 |
c.await(); |
837 |
lock.unlock(); |
838 |
}}); |
839 |
|
840 |
Thread t2 = new Thread(new CheckedRunnable() { |
841 |
public void realRun() throws InterruptedException { |
842 |
lock.lock(); |
843 |
assertFalse(lock.getWaitingThreads(c).isEmpty()); |
844 |
locked2.countDown(); |
845 |
c.await(); |
846 |
lock.unlock(); |
847 |
}}); |
848 |
|
849 |
lock.lock(); |
850 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
851 |
lock.unlock(); |
852 |
|
853 |
t1.start(); |
854 |
await(locked1); |
855 |
|
856 |
lock.lock(); |
857 |
assertHasWaiters(lock, c, t1); |
858 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
859 |
assertFalse(lock.getWaitingThreads(c).contains(t2)); |
860 |
assertEquals(1, lock.getWaitingThreads(c).size()); |
861 |
lock.unlock(); |
862 |
|
863 |
t2.start(); |
864 |
await(locked2); |
865 |
|
866 |
lock.lock(); |
867 |
assertHasWaiters(lock, c, t1, t2); |
868 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
869 |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
870 |
assertEquals(2, lock.getWaitingThreads(c).size()); |
871 |
c.signalAll(); |
872 |
assertHasNoWaiters(lock, c); |
873 |
lock.unlock(); |
874 |
|
875 |
awaitTermination(t1); |
876 |
awaitTermination(t2); |
877 |
|
878 |
assertHasNoWaiters(lock, c); |
879 |
} |
880 |
|
881 |
/** |
882 |
* awaitUninterruptibly doesn't abort on interrupt |
883 |
*/ |
884 |
public void testAwaitUninterruptibly() { testAwaitUninterruptibly(false); } |
885 |
public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); } |
886 |
public void testAwaitUninterruptibly(boolean fair) { |
887 |
final ReentrantLock lock = new ReentrantLock(fair); |
888 |
final Condition c = lock.newCondition(); |
889 |
final CountDownLatch locked = new CountDownLatch(1); |
890 |
Thread t = newStartedThread(new CheckedRunnable() { |
891 |
public void realRun() { |
892 |
lock.lock(); |
893 |
locked.countDown(); |
894 |
c.awaitUninterruptibly(); |
895 |
assertTrue(Thread.interrupted()); |
896 |
lock.unlock(); |
897 |
}}); |
898 |
|
899 |
await(locked); |
900 |
lock.lock(); |
901 |
lock.unlock(); |
902 |
t.interrupt(); |
903 |
long timeoutMillis = 10; |
904 |
assertThreadStaysAlive(t, timeoutMillis); |
905 |
lock.lock(); |
906 |
c.signal(); |
907 |
lock.unlock(); |
908 |
awaitTermination(t); |
909 |
} |
910 |
|
911 |
/** |
912 |
* await/awaitNanos/awaitUntil is interruptible |
913 |
*/ |
914 |
public void testInterruptible_await() { testInterruptible(false, AwaitMethod.await); } |
915 |
public void testInterruptible_await_fair() { testInterruptible(true, AwaitMethod.await); } |
916 |
public void testInterruptible_awaitTimed() { testInterruptible(false, AwaitMethod.awaitTimed); } |
917 |
public void testInterruptible_awaitTimed_fair() { testInterruptible(true, AwaitMethod.awaitTimed); } |
918 |
public void testInterruptible_awaitNanos() { testInterruptible(false, AwaitMethod.awaitNanos); } |
919 |
public void testInterruptible_awaitNanos_fair() { testInterruptible(true, AwaitMethod.awaitNanos); } |
920 |
public void testInterruptible_awaitUntil() { testInterruptible(false, AwaitMethod.awaitUntil); } |
921 |
public void testInterruptible_awaitUntil_fair() { testInterruptible(true, AwaitMethod.awaitUntil); } |
922 |
public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) { |
923 |
final PublicReentrantLock lock = |
924 |
new PublicReentrantLock(fair); |
925 |
final Condition c = lock.newCondition(); |
926 |
final CountDownLatch locked = new CountDownLatch(1); |
927 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
928 |
public void realRun() throws InterruptedException { |
929 |
lock.lock(); |
930 |
assertLockedByMoi(lock); |
931 |
assertHasNoWaiters(lock, c); |
932 |
locked.countDown(); |
933 |
try { |
934 |
await(c, awaitMethod); |
935 |
} finally { |
936 |
assertLockedByMoi(lock); |
937 |
assertHasNoWaiters(lock, c); |
938 |
lock.unlock(); |
939 |
assertFalse(Thread.interrupted()); |
940 |
} |
941 |
}}); |
942 |
|
943 |
await(locked); |
944 |
assertHasWaiters(lock, c, t); |
945 |
t.interrupt(); |
946 |
awaitTermination(t); |
947 |
assertNotLocked(lock); |
948 |
} |
949 |
|
950 |
/** |
951 |
* signalAll wakes up all threads |
952 |
*/ |
953 |
public void testSignalAll_await() { testSignalAll(false, AwaitMethod.await); } |
954 |
public void testSignalAll_await_fair() { testSignalAll(true, AwaitMethod.await); } |
955 |
public void testSignalAll_awaitTimed() { testSignalAll(false, AwaitMethod.awaitTimed); } |
956 |
public void testSignalAll_awaitTimed_fair() { testSignalAll(true, AwaitMethod.awaitTimed); } |
957 |
public void testSignalAll_awaitNanos() { testSignalAll(false, AwaitMethod.awaitNanos); } |
958 |
public void testSignalAll_awaitNanos_fair() { testSignalAll(true, AwaitMethod.awaitNanos); } |
959 |
public void testSignalAll_awaitUntil() { testSignalAll(false, AwaitMethod.awaitUntil); } |
960 |
public void testSignalAll_awaitUntil_fair() { testSignalAll(true, AwaitMethod.awaitUntil); } |
961 |
public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) { |
962 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
963 |
final Condition c = lock.newCondition(); |
964 |
final CountDownLatch locked = new CountDownLatch(2); |
965 |
class Awaiter extends CheckedRunnable { |
966 |
public void realRun() throws InterruptedException { |
967 |
lock.lock(); |
968 |
locked.countDown(); |
969 |
await(c, awaitMethod); |
970 |
lock.unlock(); |
971 |
} |
972 |
} |
973 |
|
974 |
Thread t1 = newStartedThread(new Awaiter()); |
975 |
Thread t2 = newStartedThread(new Awaiter()); |
976 |
|
977 |
await(locked); |
978 |
lock.lock(); |
979 |
assertHasWaiters(lock, c, t1, t2); |
980 |
c.signalAll(); |
981 |
assertHasNoWaiters(lock, c); |
982 |
lock.unlock(); |
983 |
awaitTermination(t1); |
984 |
awaitTermination(t2); |
985 |
} |
986 |
|
987 |
/** |
988 |
* signal wakes up waiting threads in FIFO order |
989 |
*/ |
990 |
public void testSignalWakesFifo() { testSignalWakesFifo(false); } |
991 |
public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); } |
992 |
public void testSignalWakesFifo(boolean fair) { |
993 |
final PublicReentrantLock lock = |
994 |
new PublicReentrantLock(fair); |
995 |
final Condition c = lock.newCondition(); |
996 |
final CountDownLatch locked1 = new CountDownLatch(1); |
997 |
final CountDownLatch locked2 = new CountDownLatch(1); |
998 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
999 |
public void realRun() throws InterruptedException { |
1000 |
lock.lock(); |
1001 |
locked1.countDown(); |
1002 |
c.await(); |
1003 |
lock.unlock(); |
1004 |
}}); |
1005 |
|
1006 |
await(locked1); |
1007 |
|
1008 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1009 |
public void realRun() throws InterruptedException { |
1010 |
lock.lock(); |
1011 |
locked2.countDown(); |
1012 |
c.await(); |
1013 |
lock.unlock(); |
1014 |
}}); |
1015 |
|
1016 |
await(locked2); |
1017 |
|
1018 |
lock.lock(); |
1019 |
assertHasWaiters(lock, c, t1, t2); |
1020 |
assertFalse(lock.hasQueuedThreads()); |
1021 |
c.signal(); |
1022 |
assertHasWaiters(lock, c, t2); |
1023 |
assertTrue(lock.hasQueuedThread(t1)); |
1024 |
assertFalse(lock.hasQueuedThread(t2)); |
1025 |
c.signal(); |
1026 |
assertHasNoWaiters(lock, c); |
1027 |
assertTrue(lock.hasQueuedThread(t1)); |
1028 |
assertTrue(lock.hasQueuedThread(t2)); |
1029 |
lock.unlock(); |
1030 |
awaitTermination(t1); |
1031 |
awaitTermination(t2); |
1032 |
} |
1033 |
|
1034 |
/** |
1035 |
* await after multiple reentrant locking preserves lock count |
1036 |
*/ |
1037 |
public void testAwaitLockCount() { testAwaitLockCount(false); } |
1038 |
public void testAwaitLockCount_fair() { testAwaitLockCount(true); } |
1039 |
public void testAwaitLockCount(boolean fair) { |
1040 |
final PublicReentrantLock lock = new PublicReentrantLock(fair); |
1041 |
final Condition c = lock.newCondition(); |
1042 |
final CountDownLatch locked = new CountDownLatch(2); |
1043 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1044 |
public void realRun() throws InterruptedException { |
1045 |
lock.lock(); |
1046 |
assertLockedByMoi(lock); |
1047 |
assertEquals(1, lock.getHoldCount()); |
1048 |
locked.countDown(); |
1049 |
c.await(); |
1050 |
assertLockedByMoi(lock); |
1051 |
assertEquals(1, lock.getHoldCount()); |
1052 |
lock.unlock(); |
1053 |
}}); |
1054 |
|
1055 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1056 |
public void realRun() throws InterruptedException { |
1057 |
lock.lock(); |
1058 |
lock.lock(); |
1059 |
assertLockedByMoi(lock); |
1060 |
assertEquals(2, lock.getHoldCount()); |
1061 |
locked.countDown(); |
1062 |
c.await(); |
1063 |
assertLockedByMoi(lock); |
1064 |
assertEquals(2, lock.getHoldCount()); |
1065 |
lock.unlock(); |
1066 |
lock.unlock(); |
1067 |
}}); |
1068 |
|
1069 |
await(locked); |
1070 |
lock.lock(); |
1071 |
assertHasWaiters(lock, c, t1, t2); |
1072 |
assertEquals(1, lock.getHoldCount()); |
1073 |
c.signalAll(); |
1074 |
assertHasNoWaiters(lock, c); |
1075 |
lock.unlock(); |
1076 |
awaitTermination(t1); |
1077 |
awaitTermination(t2); |
1078 |
} |
1079 |
|
1080 |
/** |
1081 |
* A serialized lock deserializes as unlocked |
1082 |
*/ |
1083 |
public void testSerialization() { testSerialization(false); } |
1084 |
public void testSerialization_fair() { testSerialization(true); } |
1085 |
public void testSerialization(boolean fair) { |
1086 |
ReentrantLock lock = new ReentrantLock(fair); |
1087 |
lock.lock(); |
1088 |
|
1089 |
ReentrantLock clone = serialClone(lock); |
1090 |
assertEquals(lock.isFair(), clone.isFair()); |
1091 |
assertTrue(lock.isLocked()); |
1092 |
assertFalse(clone.isLocked()); |
1093 |
assertEquals(1, lock.getHoldCount()); |
1094 |
assertEquals(0, clone.getHoldCount()); |
1095 |
clone.lock(); |
1096 |
clone.lock(); |
1097 |
assertTrue(clone.isLocked()); |
1098 |
assertEquals(2, clone.getHoldCount()); |
1099 |
assertEquals(1, lock.getHoldCount()); |
1100 |
clone.unlock(); |
1101 |
clone.unlock(); |
1102 |
assertTrue(lock.isLocked()); |
1103 |
assertFalse(clone.isLocked()); |
1104 |
} |
1105 |
|
1106 |
/** |
1107 |
* toString indicates current lock state |
1108 |
*/ |
1109 |
public void testToString() { testToString(false); } |
1110 |
public void testToString_fair() { testToString(true); } |
1111 |
public void testToString(boolean fair) { |
1112 |
ReentrantLock lock = new ReentrantLock(fair); |
1113 |
assertTrue(lock.toString().contains("Unlocked")); |
1114 |
lock.lock(); |
1115 |
assertTrue(lock.toString().contains("Locked")); |
1116 |
lock.unlock(); |
1117 |
assertTrue(lock.toString().contains("Unlocked")); |
1118 |
} |
1119 |
} |