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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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* 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 |
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* 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. |
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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 TestCase { |
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static int HOLD_COUNT_TEST_LIMIT = 20; |
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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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junit.textui.TestRunner.run(suite()); |
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} |
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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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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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/** |
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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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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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* Constructor sets given fairness |
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*/ |
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public void testConstructor() { |
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assertFalse(new ReentrantLock().isFair()); |
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assertFalse(new ReentrantLock(false).isFair()); |
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assertTrue(new ReentrantLock(true).isFair()); |
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} |
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|
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/** |
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* locking an unlocked lock succeeds |
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*/ |
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public void testLock() { |
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ReentrantLock rl = new ReentrantLock(); |
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rl.lock(); |
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assertTrue(rl.isLocked()); |
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rl.unlock(); |
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assertFalse(rl.isLocked()); |
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} |
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|
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/** |
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* locking an unlocked fair lock succeeds |
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*/ |
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public void testFairLock() { |
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ReentrantLock rl = new ReentrantLock(true); |
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rl.lock(); |
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assertTrue(rl.isLocked()); |
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rl.unlock(); |
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} |
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|
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private static long SHORT_DELAY_MS = 100; |
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private static long MEDIUM_DELAY_MS = 1000; |
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private static long LONG_DELAY_MS = 10000; |
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|
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/* |
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* Unlocks an unlocked lock, throws Illegal Monitor State |
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* |
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*/ |
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|
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public void testIllegalMonitorStateException(){ |
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ReentrantLock rl = new ReentrantLock(); |
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try{ |
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rl.unlock(); |
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fail("Should of thown Illegal Monitor State Exception"); |
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|
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}catch(IllegalMonitorStateException sucess){} |
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|
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|
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} |
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|
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/* |
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* makes a lock, locks it, tries to aquire the lock in another thread |
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* interrupts that thread and waits for an interrupted Exception to |
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* be thrown. |
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*/ |
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|
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public void testInterruptedException(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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lock.lockInterruptibly(); |
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fail("should throw"); |
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}catch(InterruptedException sucess){} |
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} |
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}); |
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t.start(); |
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t.interrupt(); |
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lock.unlock(); |
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} |
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|
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/* |
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* tests for interrupted exception on a timed wait |
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* |
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*/ |
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|
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|
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public void testInterruptedException2(){ |
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final ReentrantLock lock = new ReentrantLock(); |
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lock.lock(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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lock.tryLock(1000,TimeUnit.MILLISECONDS); |
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fail("should throw"); |
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}catch(InterruptedException sucess){} |
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} |
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}); |
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t.start(); |
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t.interrupt(); |
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/** |
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* Unlocking an unlocked lock throws IllegalMonitorStateException |
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*/ |
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public void testUnlock_IllegalMonitorStateException() { |
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ReentrantLock rl = new ReentrantLock(); |
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try { |
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rl.unlock(); |
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shouldThrow(); |
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} catch (IllegalMonitorStateException success) {} |
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} |
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|
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/** |
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* tryLock on an unlocked lock succeeds |
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*/ |
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public void testTryLock() { |
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ReentrantLock rl = new ReentrantLock(); |
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assertTrue(rl.tryLock()); |
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assertTrue(rl.isLocked()); |
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rl.unlock(); |
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} |
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|
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|
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/** |
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* hasQueuedThreads reports whether there are waiting threads |
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*/ |
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public void testhasQueuedThreads() throws InterruptedException { |
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final ReentrantLock lock = new ReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertFalse(lock.hasQueuedThreads()); |
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lock.lock(); |
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t1.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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lock.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertFalse(lock.hasQueuedThreads()); |
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awaitTermination(t1); |
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awaitTermination(t2); |
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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() throws InterruptedException { |
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final ReentrantLock lock = new ReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertEquals(0, lock.getQueueLength()); |
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lock.lock(); |
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t1.start(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(2, lock.getQueueLength()); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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lock.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(0, lock.getQueueLength()); |
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awaitTermination(t1); |
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awaitTermination(t2); |
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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_fair() throws InterruptedException { |
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final ReentrantLock lock = new ReentrantLock(true); |
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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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delay(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(2, lock.getQueueLength()); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(1, lock.getQueueLength()); |
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lock.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertEquals(0, lock.getQueueLength()); |
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awaitTermination(t1); |
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awaitTermination(t2); |
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} |
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|
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/** |
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* hasQueuedThread(null) throws NPE |
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*/ |
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public void testHasQueuedThreadNPE() { |
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final ReentrantLock sync = new ReentrantLock(); |
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try { |
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sync.hasQueuedThread(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* hasQueuedThread reports whether a thread is queued. |
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*/ |
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public void testHasQueuedThread() throws InterruptedException { |
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final ReentrantLock sync = new ReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(sync)); |
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assertFalse(sync.hasQueuedThread(t1)); |
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assertFalse(sync.hasQueuedThread(t2)); |
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sync.lock(); |
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t1.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThread(t1)); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThread(t1)); |
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assertTrue(sync.hasQueuedThread(t2)); |
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t1.interrupt(); |
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delay(SHORT_DELAY_MS); |
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assertFalse(sync.hasQueuedThread(t1)); |
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assertTrue(sync.hasQueuedThread(t2)); |
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sync.unlock(); |
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delay(SHORT_DELAY_MS); |
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assertFalse(sync.hasQueuedThread(t1)); |
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delay(SHORT_DELAY_MS); |
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assertFalse(sync.hasQueuedThread(t2)); |
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awaitTermination(t1); |
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awaitTermination(t2); |
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} |
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|
229 |
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|
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/** |
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* getQueuedThreads includes waiting threads |
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*/ |
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public void testGetQueuedThreads() throws InterruptedException { |
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final PublicReentrantLock lock = new PublicReentrantLock(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
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assertTrue(lock.getQueuedThreads().isEmpty()); |
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lock.lock(); |
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assertTrue(lock.getQueuedThreads().isEmpty()); |
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t1.start(); |
241 |
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delay(SHORT_DELAY_MS); |
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assertTrue(lock.getQueuedThreads().contains(t1)); |
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t2.start(); |
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> |
delay(SHORT_DELAY_MS); |
245 |
> |
assertTrue(lock.getQueuedThreads().contains(t1)); |
246 |
> |
assertTrue(lock.getQueuedThreads().contains(t2)); |
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t1.interrupt(); |
248 |
> |
delay(SHORT_DELAY_MS); |
249 |
> |
assertFalse(lock.getQueuedThreads().contains(t1)); |
250 |
> |
assertTrue(lock.getQueuedThreads().contains(t2)); |
251 |
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lock.unlock(); |
252 |
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delay(SHORT_DELAY_MS); |
253 |
> |
assertTrue(lock.getQueuedThreads().isEmpty()); |
254 |
> |
awaitTermination(t1); |
255 |
> |
awaitTermination(t2); |
256 |
> |
} |
257 |
> |
|
258 |
> |
|
259 |
> |
/** |
260 |
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* timed tryLock is interruptible. |
261 |
> |
*/ |
262 |
> |
public void testInterruptedException2() throws InterruptedException { |
263 |
> |
final ReentrantLock lock = new ReentrantLock(); |
264 |
> |
lock.lock(); |
265 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
266 |
> |
public void realRun() throws InterruptedException { |
267 |
> |
lock.tryLock(MEDIUM_DELAY_MS,MILLISECONDS); |
268 |
> |
}}); |
269 |
> |
|
270 |
> |
delay(SHORT_DELAY_MS); |
271 |
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t.interrupt(); |
272 |
> |
awaitTermination(t); |
273 |
> |
} |
274 |
> |
|
275 |
> |
|
276 |
> |
/** |
277 |
> |
* TryLock on a locked lock fails |
278 |
> |
*/ |
279 |
> |
public void testTryLockWhenLocked() throws InterruptedException { |
280 |
> |
final ReentrantLock lock = new ReentrantLock(); |
281 |
> |
lock.lock(); |
282 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
283 |
> |
public void realRun() { |
284 |
> |
assertFalse(lock.tryLock()); |
285 |
> |
}}); |
286 |
> |
|
287 |
> |
awaitTermination(t); |
288 |
> |
lock.unlock(); |
289 |
> |
} |
290 |
> |
|
291 |
> |
/** |
292 |
> |
* Timed tryLock on a locked lock times out |
293 |
> |
*/ |
294 |
> |
public void testTryLock_Timeout() throws InterruptedException { |
295 |
> |
final ReentrantLock lock = new ReentrantLock(); |
296 |
> |
lock.lock(); |
297 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
298 |
> |
public void realRun() throws InterruptedException { |
299 |
> |
assertFalse(lock.tryLock(1, MILLISECONDS)); |
300 |
> |
}}); |
301 |
> |
|
302 |
> |
awaitTermination(t); |
303 |
> |
lock.unlock(); |
304 |
> |
} |
305 |
> |
|
306 |
> |
/** |
307 |
> |
* getHoldCount returns number of recursive holds |
308 |
> |
*/ |
309 |
|
public void testGetHoldCount() { |
310 |
< |
ReentrantLock lock = new ReentrantLock(); |
311 |
< |
for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) { |
312 |
< |
lock.lock(); |
313 |
< |
assertEquals(i,lock.getHoldCount()); |
314 |
< |
} |
315 |
< |
for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) { |
316 |
< |
lock.unlock(); |
317 |
< |
assertEquals(i-1,lock.getHoldCount()); |
96 |
< |
} |
97 |
< |
} |
98 |
< |
|
99 |
< |
|
100 |
< |
|
101 |
< |
|
102 |
< |
public void testIsLocked() { |
103 |
< |
final ReentrantLock lock = new ReentrantLock(); |
104 |
< |
lock.lock(); |
105 |
< |
assertTrue(lock.isLocked()); |
106 |
< |
lock.unlock(); |
107 |
< |
assertFalse(lock.isLocked()); |
108 |
< |
Thread t = new Thread(new Runnable() { |
109 |
< |
public void run() { |
110 |
< |
lock.lock(); |
111 |
< |
try { |
112 |
< |
Thread.sleep(SHORT_DELAY_MS * 2); |
113 |
< |
} |
114 |
< |
catch(Exception e) {} |
115 |
< |
lock.unlock(); |
116 |
< |
} |
117 |
< |
}); |
118 |
< |
try{ |
119 |
< |
t.start(); |
120 |
< |
Thread.sleep(SHORT_DELAY_MS); |
121 |
< |
assertTrue(lock.isLocked()); |
122 |
< |
t.join(); |
123 |
< |
assertFalse(lock.isLocked()); |
124 |
< |
} catch(Exception e){ |
125 |
< |
fail("unexpected exception"); |
310 |
> |
ReentrantLock lock = new ReentrantLock(); |
311 |
> |
for (int i = 1; i <= SIZE; i++) { |
312 |
> |
lock.lock(); |
313 |
> |
assertEquals(i, lock.getHoldCount()); |
314 |
> |
} |
315 |
> |
for (int i = SIZE; i > 0; i--) { |
316 |
> |
lock.unlock(); |
317 |
> |
assertEquals(i-1, lock.getHoldCount()); |
318 |
|
} |
319 |
+ |
} |
320 |
+ |
|
321 |
|
|
322 |
+ |
/** |
323 |
+ |
* isLocked is true when locked and false when not |
324 |
+ |
*/ |
325 |
+ |
public void testIsLocked() throws InterruptedException { |
326 |
+ |
final ReentrantLock lock = new ReentrantLock(); |
327 |
+ |
lock.lock(); |
328 |
+ |
assertTrue(lock.isLocked()); |
329 |
+ |
lock.unlock(); |
330 |
+ |
assertFalse(lock.isLocked()); |
331 |
+ |
Thread t = newStartedThread(new CheckedRunnable() { |
332 |
+ |
public void realRun() throws InterruptedException { |
333 |
+ |
lock.lock(); |
334 |
+ |
delay(SMALL_DELAY_MS); |
335 |
+ |
lock.unlock(); |
336 |
+ |
}}); |
337 |
+ |
|
338 |
+ |
delay(SHORT_DELAY_MS); |
339 |
+ |
assertTrue(lock.isLocked()); |
340 |
+ |
awaitTermination(t); |
341 |
+ |
assertFalse(lock.isLocked()); |
342 |
|
} |
343 |
|
|
344 |
< |
/* |
345 |
< |
* current thread locks interruptibly the thread |
346 |
< |
* another thread tries to aquire the lock and blocks |
347 |
< |
* on the call. interrupt the attempted aquireLock |
348 |
< |
* assert that the first lock() call actually locked the lock |
349 |
< |
* assert that the current thread is the one holding the lock |
350 |
< |
*/ |
351 |
< |
|
352 |
< |
public void testLockedInterruptibly() { |
353 |
< |
final ReentrantLock lock = new ReentrantLock(); |
354 |
< |
try {lock.lockInterruptibly();} catch(Exception e) {} |
355 |
< |
Thread t = new Thread(new Runnable() { |
356 |
< |
public void run() { |
143 |
< |
try { |
144 |
< |
lock.lockInterruptibly(); |
145 |
< |
fail("Failed to generate an Interrupted Exception"); |
146 |
< |
} |
147 |
< |
catch(InterruptedException e) {} |
148 |
< |
} |
149 |
< |
}); |
150 |
< |
t.start(); |
151 |
< |
t.interrupt(); |
152 |
< |
assertTrue(lock.isLocked()); |
153 |
< |
assertTrue(lock.isHeldByCurrentThread()); |
344 |
> |
|
345 |
> |
/** |
346 |
> |
* lockInterruptibly is interruptible. |
347 |
> |
*/ |
348 |
> |
public void testLockInterruptibly1() throws InterruptedException { |
349 |
> |
final ReentrantLock lock = new ReentrantLock(); |
350 |
> |
lock.lock(); |
351 |
> |
Thread t = newStartedThread(new InterruptedLockRunnable(lock)); |
352 |
> |
delay(SHORT_DELAY_MS); |
353 |
> |
t.interrupt(); |
354 |
> |
delay(SHORT_DELAY_MS); |
355 |
> |
lock.unlock(); |
356 |
> |
awaitTermination(t); |
357 |
|
} |
358 |
|
|
359 |
< |
public void testAwait_IllegalMonitor() { |
360 |
< |
final ReentrantLock lock = new ReentrantLock(); |
359 |
> |
/** |
360 |
> |
* lockInterruptibly succeeds when unlocked, else is interruptible |
361 |
> |
*/ |
362 |
> |
public void testLockInterruptibly2() throws InterruptedException { |
363 |
> |
final ReentrantLock lock = new ReentrantLock(); |
364 |
> |
lock.lockInterruptibly(); |
365 |
> |
Thread t = newStartedThread(new InterruptedLockRunnable(lock)); |
366 |
> |
delay(SHORT_DELAY_MS); |
367 |
> |
t.interrupt(); |
368 |
> |
assertTrue(lock.isLocked()); |
369 |
> |
assertTrue(lock.isHeldByCurrentThread()); |
370 |
> |
awaitTermination(t); |
371 |
> |
} |
372 |
> |
|
373 |
> |
/** |
374 |
> |
* Calling await without holding lock throws IllegalMonitorStateException |
375 |
> |
*/ |
376 |
> |
public void testAwait_IllegalMonitor() throws InterruptedException { |
377 |
> |
final ReentrantLock lock = new ReentrantLock(); |
378 |
|
final Condition c = lock.newCondition(); |
379 |
|
try { |
380 |
|
c.await(); |
381 |
< |
fail("should throw"); |
382 |
< |
} |
163 |
< |
catch (IllegalMonitorStateException success) { |
164 |
< |
} |
165 |
< |
catch (Exception ex) { |
166 |
< |
fail("should throw IMSE"); |
167 |
< |
} |
381 |
> |
shouldThrow(); |
382 |
> |
} catch (IllegalMonitorStateException success) {} |
383 |
|
} |
384 |
|
|
385 |
+ |
/** |
386 |
+ |
* Calling signal without holding lock throws IllegalMonitorStateException |
387 |
+ |
*/ |
388 |
|
public void testSignal_IllegalMonitor() { |
389 |
< |
final ReentrantLock lock = new ReentrantLock(); |
389 |
> |
final ReentrantLock lock = new ReentrantLock(); |
390 |
|
final Condition c = lock.newCondition(); |
391 |
|
try { |
392 |
|
c.signal(); |
393 |
< |
fail("should throw"); |
394 |
< |
} |
395 |
< |
catch (IllegalMonitorStateException success) { |
396 |
< |
} |
397 |
< |
catch (Exception ex) { |
398 |
< |
fail("should throw IMSE"); |
399 |
< |
} |
393 |
> |
shouldThrow(); |
394 |
> |
} catch (IllegalMonitorStateException success) {} |
395 |
> |
} |
396 |
> |
|
397 |
> |
/** |
398 |
> |
* awaitNanos without a signal times out |
399 |
> |
*/ |
400 |
> |
public void testAwaitNanos_Timeout() throws InterruptedException { |
401 |
> |
final ReentrantLock lock = new ReentrantLock(); |
402 |
> |
final Condition c = lock.newCondition(); |
403 |
> |
lock.lock(); |
404 |
> |
long t = c.awaitNanos(100); |
405 |
> |
assertTrue(t <= 0); |
406 |
> |
lock.unlock(); |
407 |
> |
} |
408 |
> |
|
409 |
> |
/** |
410 |
> |
* timed await without a signal times out |
411 |
> |
*/ |
412 |
> |
public void testAwait_Timeout() throws InterruptedException { |
413 |
> |
final ReentrantLock lock = new ReentrantLock(); |
414 |
> |
final Condition c = lock.newCondition(); |
415 |
> |
lock.lock(); |
416 |
> |
assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS)); |
417 |
> |
lock.unlock(); |
418 |
> |
} |
419 |
> |
|
420 |
> |
/** |
421 |
> |
* awaitUntil without a signal times out |
422 |
> |
*/ |
423 |
> |
public void testAwaitUntil_Timeout() throws InterruptedException { |
424 |
> |
final ReentrantLock lock = new ReentrantLock(); |
425 |
> |
final Condition c = lock.newCondition(); |
426 |
> |
lock.lock(); |
427 |
> |
java.util.Date d = new java.util.Date(); |
428 |
> |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
429 |
> |
lock.unlock(); |
430 |
|
} |
431 |
|
|
432 |
< |
public void testAwaitNanos_Timeout() { |
433 |
< |
final ReentrantLock lock = new ReentrantLock(); |
432 |
> |
/** |
433 |
> |
* await returns when signalled |
434 |
> |
*/ |
435 |
> |
public void testAwait() throws InterruptedException { |
436 |
> |
final ReentrantLock lock = new ReentrantLock(); |
437 |
|
final Condition c = lock.newCondition(); |
438 |
+ |
Thread t = newStartedThread(new CheckedRunnable() { |
439 |
+ |
public void realRun() throws InterruptedException { |
440 |
+ |
lock.lock(); |
441 |
+ |
c.await(); |
442 |
+ |
lock.unlock(); |
443 |
+ |
}}); |
444 |
+ |
|
445 |
+ |
delay(SHORT_DELAY_MS); |
446 |
+ |
lock.lock(); |
447 |
+ |
c.signal(); |
448 |
+ |
lock.unlock(); |
449 |
+ |
awaitTermination(t); |
450 |
+ |
} |
451 |
+ |
|
452 |
+ |
/** |
453 |
+ |
* hasWaiters throws NPE if null |
454 |
+ |
*/ |
455 |
+ |
public void testHasWaitersNPE() { |
456 |
+ |
final ReentrantLock lock = new ReentrantLock(); |
457 |
|
try { |
458 |
< |
lock.lock(); |
459 |
< |
long t = c.awaitNanos(100); |
460 |
< |
assertTrue(t <= 0); |
461 |
< |
lock.unlock(); |
462 |
< |
} |
463 |
< |
catch (Exception ex) { |
464 |
< |
fail("unexpected exception"); |
465 |
< |
} |
458 |
> |
lock.hasWaiters(null); |
459 |
> |
shouldThrow(); |
460 |
> |
} catch (NullPointerException success) {} |
461 |
> |
} |
462 |
> |
|
463 |
> |
/** |
464 |
> |
* getWaitQueueLength throws NPE if null |
465 |
> |
*/ |
466 |
> |
public void testGetWaitQueueLengthNPE() { |
467 |
> |
final ReentrantLock lock = new ReentrantLock(); |
468 |
> |
try { |
469 |
> |
lock.getWaitQueueLength(null); |
470 |
> |
shouldThrow(); |
471 |
> |
} catch (NullPointerException success) {} |
472 |
|
} |
473 |
|
|
474 |
< |
public void testAwait_Timeout() { |
475 |
< |
final ReentrantLock lock = new ReentrantLock(); |
474 |
> |
|
475 |
> |
/** |
476 |
> |
* getWaitingThreads throws NPE if null |
477 |
> |
*/ |
478 |
> |
public void testGetWaitingThreadsNPE() { |
479 |
> |
final PublicReentrantLock lock = new PublicReentrantLock(); |
480 |
> |
try { |
481 |
> |
lock.getWaitingThreads(null); |
482 |
> |
shouldThrow(); |
483 |
> |
} catch (NullPointerException success) {} |
484 |
> |
} |
485 |
> |
|
486 |
> |
|
487 |
> |
/** |
488 |
> |
* hasWaiters throws IAE if not owned |
489 |
> |
*/ |
490 |
> |
public void testHasWaitersIAE() { |
491 |
> |
final ReentrantLock lock = new ReentrantLock(); |
492 |
|
final Condition c = lock.newCondition(); |
493 |
+ |
final ReentrantLock lock2 = new ReentrantLock(); |
494 |
|
try { |
495 |
< |
lock.lock(); |
496 |
< |
assertFalse(c.await(10, TimeUnit.MILLISECONDS)); |
497 |
< |
lock.unlock(); |
498 |
< |
} |
499 |
< |
catch (Exception ex) { |
500 |
< |
fail("unexpected exception"); |
501 |
< |
} |
495 |
> |
lock2.hasWaiters(c); |
496 |
> |
shouldThrow(); |
497 |
> |
} catch (IllegalArgumentException success) {} |
498 |
> |
} |
499 |
> |
|
500 |
> |
/** |
501 |
> |
* hasWaiters throws IMSE if not locked |
502 |
> |
*/ |
503 |
> |
public void testHasWaitersIMSE() { |
504 |
> |
final ReentrantLock lock = new ReentrantLock(); |
505 |
> |
final Condition c = lock.newCondition(); |
506 |
> |
try { |
507 |
> |
lock.hasWaiters(c); |
508 |
> |
shouldThrow(); |
509 |
> |
} catch (IllegalMonitorStateException success) {} |
510 |
|
} |
511 |
|
|
512 |
< |
public void testAwaitUntil_Timeout() { |
513 |
< |
final ReentrantLock lock = new ReentrantLock(); |
512 |
> |
|
513 |
> |
/** |
514 |
> |
* getWaitQueueLength throws IAE if not owned |
515 |
> |
*/ |
516 |
> |
public void testGetWaitQueueLengthIAE() { |
517 |
> |
final ReentrantLock lock = new ReentrantLock(); |
518 |
|
final Condition c = lock.newCondition(); |
519 |
+ |
final ReentrantLock lock2 = new ReentrantLock(); |
520 |
|
try { |
521 |
< |
lock.lock(); |
522 |
< |
java.util.Date d = new java.util.Date(); |
523 |
< |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
524 |
< |
lock.unlock(); |
525 |
< |
} |
526 |
< |
catch (Exception ex) { |
527 |
< |
fail("unexpected exception"); |
528 |
< |
} |
521 |
> |
lock2.getWaitQueueLength(c); |
522 |
> |
shouldThrow(); |
523 |
> |
} catch (IllegalArgumentException success) {} |
524 |
> |
} |
525 |
> |
|
526 |
> |
/** |
527 |
> |
* getWaitQueueLength throws IMSE if not locked |
528 |
> |
*/ |
529 |
> |
public void testGetWaitQueueLengthIMSE() { |
530 |
> |
final ReentrantLock lock = new ReentrantLock(); |
531 |
> |
final Condition c = lock.newCondition(); |
532 |
> |
try { |
533 |
> |
lock.getWaitQueueLength(c); |
534 |
> |
shouldThrow(); |
535 |
> |
} catch (IllegalMonitorStateException success) {} |
536 |
|
} |
537 |
|
|
538 |
< |
public void testAwait() { |
539 |
< |
final ReentrantLock lock = new ReentrantLock(); |
538 |
> |
|
539 |
> |
/** |
540 |
> |
* getWaitingThreads throws IAE if not owned |
541 |
> |
*/ |
542 |
> |
public void testGetWaitingThreadsIAE() { |
543 |
> |
final PublicReentrantLock lock = new PublicReentrantLock(); |
544 |
|
final Condition c = lock.newCondition(); |
545 |
< |
Thread t = new Thread(new Runnable() { |
546 |
< |
public void run() { |
547 |
< |
try { |
548 |
< |
lock.lock(); |
549 |
< |
c.await(); |
550 |
< |
lock.unlock(); |
234 |
< |
} |
235 |
< |
catch(InterruptedException e) { |
236 |
< |
fail("unexpected exception"); |
237 |
< |
} |
238 |
< |
} |
239 |
< |
}); |
545 |
> |
final PublicReentrantLock lock2 = new PublicReentrantLock(); |
546 |
> |
try { |
547 |
> |
lock2.getWaitingThreads(c); |
548 |
> |
shouldThrow(); |
549 |
> |
} catch (IllegalArgumentException success) {} |
550 |
> |
} |
551 |
|
|
552 |
+ |
/** |
553 |
+ |
* getWaitingThreads throws IMSE if not locked |
554 |
+ |
*/ |
555 |
+ |
public void testGetWaitingThreadsIMSE() { |
556 |
+ |
final PublicReentrantLock lock = new PublicReentrantLock(); |
557 |
+ |
final Condition c = lock.newCondition(); |
558 |
|
try { |
559 |
< |
t.start(); |
560 |
< |
Thread.sleep(SHORT_DELAY_MS); |
559 |
> |
lock.getWaitingThreads(c); |
560 |
> |
shouldThrow(); |
561 |
> |
} catch (IllegalMonitorStateException success) {} |
562 |
> |
} |
563 |
> |
|
564 |
> |
|
565 |
> |
/** |
566 |
> |
* hasWaiters returns true when a thread is waiting, else false |
567 |
> |
*/ |
568 |
> |
public void testHasWaiters() throws InterruptedException { |
569 |
> |
final ReentrantLock lock = new ReentrantLock(); |
570 |
> |
final Condition c = lock.newCondition(); |
571 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
572 |
> |
public void realRun() throws InterruptedException { |
573 |
> |
lock.lock(); |
574 |
> |
assertFalse(lock.hasWaiters(c)); |
575 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
576 |
> |
c.await(); |
577 |
> |
lock.unlock(); |
578 |
> |
}}); |
579 |
> |
|
580 |
> |
delay(SHORT_DELAY_MS); |
581 |
> |
lock.lock(); |
582 |
> |
assertTrue(lock.hasWaiters(c)); |
583 |
> |
assertEquals(1, lock.getWaitQueueLength(c)); |
584 |
> |
c.signal(); |
585 |
> |
lock.unlock(); |
586 |
> |
delay(SHORT_DELAY_MS); |
587 |
> |
lock.lock(); |
588 |
> |
assertFalse(lock.hasWaiters(c)); |
589 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
590 |
> |
lock.unlock(); |
591 |
> |
awaitTermination(t); |
592 |
> |
} |
593 |
> |
|
594 |
> |
/** |
595 |
> |
* getWaitQueueLength returns number of waiting threads |
596 |
> |
*/ |
597 |
> |
public void testGetWaitQueueLength() throws InterruptedException { |
598 |
> |
final ReentrantLock lock = new ReentrantLock(); |
599 |
> |
final Condition c = lock.newCondition(); |
600 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
601 |
> |
public void realRun() throws InterruptedException { |
602 |
> |
lock.lock(); |
603 |
> |
assertFalse(lock.hasWaiters(c)); |
604 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
605 |
> |
c.await(); |
606 |
> |
lock.unlock(); |
607 |
> |
}}); |
608 |
> |
|
609 |
> |
delay(SHORT_DELAY_MS); |
610 |
> |
|
611 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
612 |
> |
public void realRun() throws InterruptedException { |
613 |
> |
lock.lock(); |
614 |
> |
assertTrue(lock.hasWaiters(c)); |
615 |
> |
assertEquals(1, lock.getWaitQueueLength(c)); |
616 |
> |
c.await(); |
617 |
> |
lock.unlock(); |
618 |
> |
}}); |
619 |
> |
|
620 |
> |
delay(SHORT_DELAY_MS); |
621 |
> |
lock.lock(); |
622 |
> |
assertTrue(lock.hasWaiters(c)); |
623 |
> |
assertEquals(2, lock.getWaitQueueLength(c)); |
624 |
> |
c.signalAll(); |
625 |
> |
lock.unlock(); |
626 |
> |
delay(SHORT_DELAY_MS); |
627 |
> |
lock.lock(); |
628 |
> |
assertFalse(lock.hasWaiters(c)); |
629 |
> |
assertEquals(0, lock.getWaitQueueLength(c)); |
630 |
> |
lock.unlock(); |
631 |
> |
awaitTermination(t1); |
632 |
> |
awaitTermination(t2); |
633 |
> |
} |
634 |
> |
|
635 |
> |
/** |
636 |
> |
* getWaitingThreads returns only and all waiting threads |
637 |
> |
*/ |
638 |
> |
public void testGetWaitingThreads() throws InterruptedException { |
639 |
> |
final PublicReentrantLock lock = new PublicReentrantLock(); |
640 |
> |
final Condition c = lock.newCondition(); |
641 |
> |
Thread t1 = new Thread(new CheckedRunnable() { |
642 |
> |
public void realRun() throws InterruptedException { |
643 |
> |
lock.lock(); |
644 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
645 |
> |
c.await(); |
646 |
> |
lock.unlock(); |
647 |
> |
}}); |
648 |
> |
|
649 |
> |
Thread t2 = new Thread(new CheckedRunnable() { |
650 |
> |
public void realRun() throws InterruptedException { |
651 |
> |
lock.lock(); |
652 |
> |
assertFalse(lock.getWaitingThreads(c).isEmpty()); |
653 |
> |
c.await(); |
654 |
> |
lock.unlock(); |
655 |
> |
}}); |
656 |
> |
|
657 |
> |
lock.lock(); |
658 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
659 |
> |
lock.unlock(); |
660 |
> |
t1.start(); |
661 |
> |
delay(SHORT_DELAY_MS); |
662 |
> |
t2.start(); |
663 |
> |
delay(SHORT_DELAY_MS); |
664 |
> |
lock.lock(); |
665 |
> |
assertTrue(lock.hasWaiters(c)); |
666 |
> |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
667 |
> |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
668 |
> |
c.signalAll(); |
669 |
> |
lock.unlock(); |
670 |
> |
delay(SHORT_DELAY_MS); |
671 |
> |
lock.lock(); |
672 |
> |
assertFalse(lock.hasWaiters(c)); |
673 |
> |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
674 |
> |
lock.unlock(); |
675 |
> |
awaitTermination(t1); |
676 |
> |
awaitTermination(t2); |
677 |
> |
} |
678 |
> |
|
679 |
> |
/** A helper class for uninterruptible wait tests */ |
680 |
> |
class UninterruptibleThread extends Thread { |
681 |
> |
private ReentrantLock lock; |
682 |
> |
private Condition c; |
683 |
> |
|
684 |
> |
public volatile boolean canAwake = false; |
685 |
> |
public volatile boolean interrupted = false; |
686 |
> |
public volatile boolean lockStarted = false; |
687 |
> |
|
688 |
> |
public UninterruptibleThread(ReentrantLock lock, Condition c) { |
689 |
> |
this.lock = lock; |
690 |
> |
this.c = c; |
691 |
> |
} |
692 |
> |
|
693 |
> |
public synchronized void run() { |
694 |
|
lock.lock(); |
695 |
< |
c.signal(); |
695 |
> |
lockStarted = true; |
696 |
> |
|
697 |
> |
while (!canAwake) { |
698 |
> |
c.awaitUninterruptibly(); |
699 |
> |
} |
700 |
> |
|
701 |
> |
interrupted = isInterrupted(); |
702 |
|
lock.unlock(); |
247 |
– |
t.join(SHORT_DELAY_MS); |
248 |
– |
assertFalse(t.isAlive()); |
249 |
– |
} |
250 |
– |
catch (Exception ex) { |
251 |
– |
fail("unexpected exception"); |
703 |
|
} |
704 |
|
} |
705 |
|
|
706 |
< |
public void testAwaitUninterruptibly() { |
707 |
< |
final ReentrantLock lock = new ReentrantLock(); |
706 |
> |
/** |
707 |
> |
* awaitUninterruptibly doesn't abort on interrupt |
708 |
> |
*/ |
709 |
> |
public void testAwaitUninterruptibly() throws InterruptedException { |
710 |
> |
final ReentrantLock lock = new ReentrantLock(); |
711 |
|
final Condition c = lock.newCondition(); |
712 |
< |
Thread t = new Thread(new Runnable() { |
713 |
< |
public void run() { |
714 |
< |
lock.lock(); |
261 |
< |
c.awaitUninterruptibly(); |
262 |
< |
lock.unlock(); |
263 |
< |
} |
264 |
< |
}); |
712 |
> |
UninterruptibleThread thread = new UninterruptibleThread(lock, c); |
713 |
> |
|
714 |
> |
thread.start(); |
715 |
|
|
716 |
+ |
while (!thread.lockStarted) { |
717 |
+ |
delay(100); |
718 |
+ |
} |
719 |
+ |
|
720 |
+ |
lock.lock(); |
721 |
|
try { |
722 |
< |
t.start(); |
723 |
< |
Thread.sleep(SHORT_DELAY_MS); |
269 |
< |
t.interrupt(); |
270 |
< |
lock.lock(); |
722 |
> |
thread.interrupt(); |
723 |
> |
thread.canAwake = true; |
724 |
|
c.signal(); |
725 |
+ |
} finally { |
726 |
|
lock.unlock(); |
273 |
– |
t.join(SHORT_DELAY_MS); |
274 |
– |
assertFalse(t.isAlive()); |
275 |
– |
} |
276 |
– |
catch (Exception ex) { |
277 |
– |
fail("unexpected exception"); |
727 |
|
} |
728 |
+ |
|
729 |
+ |
thread.join(); |
730 |
+ |
assertTrue(thread.interrupted); |
731 |
+ |
assertFalse(thread.isAlive()); |
732 |
|
} |
733 |
|
|
734 |
< |
public void testAwait_Interrupt() { |
735 |
< |
final ReentrantLock lock = new ReentrantLock(); |
734 |
> |
/** |
735 |
> |
* await is interruptible |
736 |
> |
*/ |
737 |
> |
public void testAwait_Interrupt() throws InterruptedException { |
738 |
> |
final ReentrantLock lock = new ReentrantLock(); |
739 |
|
final Condition c = lock.newCondition(); |
740 |
< |
Thread t = new Thread(new Runnable() { |
741 |
< |
public void run() { |
742 |
< |
try { |
743 |
< |
lock.lock(); |
744 |
< |
c.await(); |
745 |
< |
lock.unlock(); |
746 |
< |
fail("should throw"); |
747 |
< |
} |
748 |
< |
catch(InterruptedException success) { |
293 |
< |
} |
294 |
< |
} |
295 |
< |
}); |
296 |
< |
|
297 |
< |
try { |
298 |
< |
t.start(); |
299 |
< |
Thread.sleep(SHORT_DELAY_MS); |
300 |
< |
t.interrupt(); |
301 |
< |
t.join(SHORT_DELAY_MS); |
302 |
< |
assertFalse(t.isAlive()); |
303 |
< |
} |
304 |
< |
catch (Exception ex) { |
305 |
< |
fail("unexpected exception"); |
306 |
< |
} |
740 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
741 |
> |
public void realRun() throws InterruptedException { |
742 |
> |
lock.lock(); |
743 |
> |
c.await(); |
744 |
> |
}}); |
745 |
> |
|
746 |
> |
delay(SHORT_DELAY_MS); |
747 |
> |
t.interrupt(); |
748 |
> |
awaitTermination(t); |
749 |
|
} |
750 |
|
|
751 |
< |
public void testAwaitNanos_Interrupt() { |
752 |
< |
final ReentrantLock lock = new ReentrantLock(); |
751 |
> |
/** |
752 |
> |
* awaitNanos is interruptible |
753 |
> |
*/ |
754 |
> |
public void testAwaitNanos_Interrupt() throws InterruptedException { |
755 |
> |
final ReentrantLock lock = new ReentrantLock(); |
756 |
|
final Condition c = lock.newCondition(); |
757 |
< |
Thread t = new Thread(new Runnable() { |
758 |
< |
public void run() { |
759 |
< |
try { |
760 |
< |
lock.lock(); |
761 |
< |
c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000); |
762 |
< |
lock.unlock(); |
763 |
< |
fail("should throw"); |
764 |
< |
} |
765 |
< |
catch(InterruptedException success) { |
321 |
< |
} |
322 |
< |
} |
323 |
< |
}); |
324 |
< |
|
325 |
< |
try { |
326 |
< |
t.start(); |
327 |
< |
Thread.sleep(SHORT_DELAY_MS); |
328 |
< |
t.interrupt(); |
329 |
< |
t.join(SHORT_DELAY_MS); |
330 |
< |
assertFalse(t.isAlive()); |
331 |
< |
} |
332 |
< |
catch (Exception ex) { |
333 |
< |
fail("unexpected exception"); |
334 |
< |
} |
757 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
758 |
> |
public void realRun() throws InterruptedException { |
759 |
> |
lock.lock(); |
760 |
> |
c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS)); |
761 |
> |
}}); |
762 |
> |
|
763 |
> |
delay(SHORT_DELAY_MS); |
764 |
> |
t.interrupt(); |
765 |
> |
awaitTermination(t); |
766 |
|
} |
767 |
|
|
768 |
< |
public void testAwaitUntil_Interrupt() { |
769 |
< |
final ReentrantLock lock = new ReentrantLock(); |
768 |
> |
/** |
769 |
> |
* awaitUntil is interruptible |
770 |
> |
*/ |
771 |
> |
public void testAwaitUntil_Interrupt() throws InterruptedException { |
772 |
> |
final ReentrantLock lock = new ReentrantLock(); |
773 |
|
final Condition c = lock.newCondition(); |
774 |
< |
Thread t = new Thread(new Runnable() { |
775 |
< |
public void run() { |
776 |
< |
try { |
777 |
< |
lock.lock(); |
778 |
< |
java.util.Date d = new java.util.Date(); |
779 |
< |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
780 |
< |
lock.unlock(); |
781 |
< |
fail("should throw"); |
782 |
< |
} |
783 |
< |
catch(InterruptedException success) { |
350 |
< |
} |
351 |
< |
} |
352 |
< |
}); |
353 |
< |
|
354 |
< |
try { |
355 |
< |
t.start(); |
356 |
< |
Thread.sleep(SHORT_DELAY_MS); |
357 |
< |
t.interrupt(); |
358 |
< |
t.join(SHORT_DELAY_MS); |
359 |
< |
assertFalse(t.isAlive()); |
360 |
< |
} |
361 |
< |
catch (Exception ex) { |
362 |
< |
fail("unexpected exception"); |
363 |
< |
} |
774 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
775 |
> |
public void realRun() throws InterruptedException { |
776 |
> |
lock.lock(); |
777 |
> |
java.util.Date d = new java.util.Date(); |
778 |
> |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
779 |
> |
}}); |
780 |
> |
|
781 |
> |
delay(SHORT_DELAY_MS); |
782 |
> |
t.interrupt(); |
783 |
> |
awaitTermination(t); |
784 |
|
} |
785 |
|
|
786 |
< |
public void testSignalAll() { |
787 |
< |
final ReentrantLock lock = new ReentrantLock(); |
786 |
> |
/** |
787 |
> |
* signalAll wakes up all threads |
788 |
> |
*/ |
789 |
> |
public void testSignalAll() throws InterruptedException { |
790 |
> |
final ReentrantLock lock = new ReentrantLock(); |
791 |
|
final Condition c = lock.newCondition(); |
792 |
< |
Thread t1 = new Thread(new Runnable() { |
793 |
< |
public void run() { |
794 |
< |
try { |
795 |
< |
lock.lock(); |
796 |
< |
c.await(); |
797 |
< |
lock.unlock(); |
798 |
< |
} |
799 |
< |
catch(InterruptedException e) { |
800 |
< |
fail("unexpected exception"); |
801 |
< |
} |
802 |
< |
} |
803 |
< |
}); |
804 |
< |
|
805 |
< |
Thread t2 = new Thread(new Runnable() { |
806 |
< |
public void run() { |
807 |
< |
try { |
808 |
< |
lock.lock(); |
809 |
< |
c.await(); |
810 |
< |
lock.unlock(); |
811 |
< |
} |
812 |
< |
catch(InterruptedException e) { |
813 |
< |
fail("unexpected exception"); |
814 |
< |
} |
815 |
< |
} |
816 |
< |
}); |
817 |
< |
|
818 |
< |
try { |
819 |
< |
t1.start(); |
820 |
< |
t2.start(); |
821 |
< |
Thread.sleep(SHORT_DELAY_MS); |
822 |
< |
lock.lock(); |
823 |
< |
c.signalAll(); |
824 |
< |
lock.unlock(); |
825 |
< |
t1.join(SHORT_DELAY_MS); |
826 |
< |
t2.join(SHORT_DELAY_MS); |
827 |
< |
assertFalse(t1.isAlive()); |
828 |
< |
assertFalse(t2.isAlive()); |
829 |
< |
} |
830 |
< |
catch (Exception ex) { |
831 |
< |
fail("unexpected exception"); |
832 |
< |
} |
792 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
793 |
> |
public void realRun() throws InterruptedException { |
794 |
> |
lock.lock(); |
795 |
> |
c.await(); |
796 |
> |
lock.unlock(); |
797 |
> |
}}); |
798 |
> |
|
799 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
800 |
> |
public void realRun() throws InterruptedException { |
801 |
> |
lock.lock(); |
802 |
> |
c.await(); |
803 |
> |
lock.unlock(); |
804 |
> |
}}); |
805 |
> |
|
806 |
> |
delay(SHORT_DELAY_MS); |
807 |
> |
lock.lock(); |
808 |
> |
c.signalAll(); |
809 |
> |
lock.unlock(); |
810 |
> |
awaitTermination(t1); |
811 |
> |
awaitTermination(t2); |
812 |
> |
} |
813 |
> |
|
814 |
> |
/** |
815 |
> |
* await after multiple reentrant locking preserves lock count |
816 |
> |
*/ |
817 |
> |
public void testAwaitLockCount() throws InterruptedException { |
818 |
> |
final ReentrantLock lock = new ReentrantLock(); |
819 |
> |
final Condition c = lock.newCondition(); |
820 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
821 |
> |
public void realRun() throws InterruptedException { |
822 |
> |
lock.lock(); |
823 |
> |
assertEquals(1, lock.getHoldCount()); |
824 |
> |
c.await(); |
825 |
> |
assertEquals(1, lock.getHoldCount()); |
826 |
> |
lock.unlock(); |
827 |
> |
}}); |
828 |
> |
|
829 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
830 |
> |
public void realRun() throws InterruptedException { |
831 |
> |
lock.lock(); |
832 |
> |
lock.lock(); |
833 |
> |
assertEquals(2, lock.getHoldCount()); |
834 |
> |
c.await(); |
835 |
> |
assertEquals(2, lock.getHoldCount()); |
836 |
> |
lock.unlock(); |
837 |
> |
lock.unlock(); |
838 |
> |
}}); |
839 |
> |
|
840 |
> |
delay(SHORT_DELAY_MS); |
841 |
> |
lock.lock(); |
842 |
> |
c.signalAll(); |
843 |
> |
lock.unlock(); |
844 |
> |
awaitTermination(t1); |
845 |
> |
awaitTermination(t2); |
846 |
> |
} |
847 |
> |
|
848 |
> |
/** |
849 |
> |
* A serialized lock deserializes as unlocked |
850 |
> |
*/ |
851 |
> |
public void testSerialization() throws Exception { |
852 |
> |
ReentrantLock l = new ReentrantLock(); |
853 |
> |
l.lock(); |
854 |
> |
l.unlock(); |
855 |
> |
|
856 |
> |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
857 |
> |
ObjectOutputStream out = |
858 |
> |
new ObjectOutputStream(new BufferedOutputStream(bout)); |
859 |
> |
out.writeObject(l); |
860 |
> |
out.close(); |
861 |
> |
|
862 |
> |
ByteArrayInputStream bin = |
863 |
> |
new ByteArrayInputStream(bout.toByteArray()); |
864 |
> |
ObjectInputStream in = |
865 |
> |
new ObjectInputStream(new BufferedInputStream(bin)); |
866 |
> |
ReentrantLock r = (ReentrantLock) in.readObject(); |
867 |
> |
r.lock(); |
868 |
> |
r.unlock(); |
869 |
> |
} |
870 |
> |
|
871 |
> |
/** |
872 |
> |
* toString indicates current lock state |
873 |
> |
*/ |
874 |
> |
public void testToString() { |
875 |
> |
ReentrantLock lock = new ReentrantLock(); |
876 |
> |
String us = lock.toString(); |
877 |
> |
assertTrue(us.indexOf("Unlocked") >= 0); |
878 |
> |
lock.lock(); |
879 |
> |
String ls = lock.toString(); |
880 |
> |
assertTrue(ls.indexOf("Locked") >= 0); |
881 |
|
} |
882 |
|
|
883 |
|
} |