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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 |
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* http://creativecommons.org/licenses/publicdomain |
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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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|
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|
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.util.concurrent.locks.*; |
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import java.io.*; |
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|
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public class AbstractQueuedSynchronizerTest 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(AbstractQueuedSynchronizerTest.class); |
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} |
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|
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/** |
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* A simple mutex class, adapted from the |
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* AbstractQueuedSynchronizer javadoc. Exclusive acquire tests |
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* exercise this as a sample user extension. Other |
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* methods/features of AbstractQueuedSynchronizerTest are tested |
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* via other test classes, including those for ReentrantLock, |
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* ReentrantReadWriteLock, and Semaphore |
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*/ |
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static class Mutex extends AbstractQueuedSynchronizer { |
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public boolean isHeldExclusively() { return getState() == 1; } |
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|
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public boolean tryAcquire(int acquires) { |
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assertTrue(acquires == 1); |
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return compareAndSetState(0, 1); |
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} |
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|
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public boolean tryRelease(int releases) { |
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if (getState() == 0) throw new IllegalMonitorStateException(); |
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setState(0); |
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return true; |
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} |
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|
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public AbstractQueuedSynchronizer.ConditionObject newCondition() { return new AbstractQueuedSynchronizer.ConditionObject(); } |
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|
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public void lock() { |
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acquire(1); |
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} |
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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 simple latch class, to test shared mode. |
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*/ |
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static class BooleanLatch extends AbstractQueuedSynchronizer { |
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public boolean isSignalled() { return getState() != 0; } |
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|
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public int tryAcquireShared(int ignore) { |
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return isSignalled()? 1 : -1; |
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} |
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|
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public boolean tryReleaseShared(int ignore) { |
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setState(1); |
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return true; |
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} |
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} |
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|
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/** |
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* A runnable calling acquireInterruptibly |
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*/ |
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class InterruptibleLockRunnable implements Runnable { |
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final Mutex lock; |
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InterruptibleLockRunnable(Mutex l) { lock = l; } |
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public void run() { |
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try { |
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lock.acquireInterruptibly(1); |
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} catch(InterruptedException success){} |
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} |
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} |
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|
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|
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/** |
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* A runnable calling acquireInterruptibly that expects to be |
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* interrupted |
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*/ |
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class InterruptedLockRunnable implements Runnable { |
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final Mutex lock; |
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InterruptedLockRunnable(Mutex l) { lock = l; } |
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public void run() { |
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try { |
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lock.acquireInterruptibly(1); |
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threadShouldThrow(); |
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} catch(InterruptedException success){} |
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} |
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} |
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|
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/** |
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* isHeldExclusively is false upon construction |
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*/ |
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public void testIsHeldExclusively() { |
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Mutex rl = new Mutex(); |
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assertFalse(rl.isHeldExclusively()); |
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} |
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|
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/** |
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* acquiring released lock succeeds |
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*/ |
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public void testAcquire() { |
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Mutex rl = new Mutex(); |
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rl.acquire(1); |
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assertTrue(rl.isHeldExclusively()); |
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rl.release(1); |
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} |
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|
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/** |
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* tryAcquire on an released lock succeeds |
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*/ |
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public void testTryAcquire() { |
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Mutex rl = new Mutex(); |
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assertTrue(rl.tryAcquire(1)); |
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assertTrue(rl.isHeldExclusively()); |
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rl.release(1); |
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} |
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|
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/** |
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* hasQueuedThreads reports whether there are waiting threads |
130 |
*/ |
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public void testhasQueuedThreads() { |
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final Mutex lock = new Mutex(); |
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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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try { |
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assertFalse(lock.hasQueuedThreads()); |
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lock.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.hasQueuedThreads()); |
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lock.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(lock.hasQueuedThreads()); |
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t1.join(); |
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t2.join(); |
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} catch(Exception e){ |
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unexpectedException(); |
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} |
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} |
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|
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/** |
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* isQueued(null) throws NPE |
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*/ |
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public void testIsQueuedNPE() { |
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final Mutex lock = new Mutex(); |
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try { |
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lock.isQueued(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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/** |
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* isQueued reports whether a thread is queued. |
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*/ |
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public void testIsQueued() { |
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final Mutex lock = new Mutex(); |
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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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try { |
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assertFalse(lock.isQueued(t1)); |
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assertFalse(lock.isQueued(t2)); |
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lock.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.isQueued(t1)); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.isQueued(t1)); |
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assertTrue(lock.isQueued(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(lock.isQueued(t1)); |
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assertTrue(lock.isQueued(t2)); |
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lock.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(lock.isQueued(t1)); |
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assertFalse(lock.isQueued(t2)); |
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t1.join(); |
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t2.join(); |
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} catch(Exception e){ |
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unexpectedException(); |
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} |
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} |
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|
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/** |
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* getFirstQueuedThread returns first waiting thread or null is none |
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*/ |
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public void testGetFirstQueuedThread() { |
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final Mutex lock = new Mutex(); |
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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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try { |
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assertNull(lock.getFirstQueuedThread()); |
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lock.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t1, lock.getFirstQueuedThread()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t1, lock.getFirstQueuedThread()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t2, lock.getFirstQueuedThread()); |
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lock.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertNull(lock.getFirstQueuedThread()); |
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t1.join(); |
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t2.join(); |
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} catch(Exception e){ |
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unexpectedException(); |
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} |
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} |
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|
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|
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/** |
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* hasContended reports false if no thread has ever blocked, else true |
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*/ |
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public void testHasContended() { |
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final Mutex lock = new Mutex(); |
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Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
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Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
239 |
try { |
240 |
assertFalse(lock.hasContended()); |
241 |
lock.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
244 |
assertTrue(lock.hasContended()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
247 |
assertTrue(lock.hasContended()); |
248 |
t1.interrupt(); |
249 |
Thread.sleep(SHORT_DELAY_MS); |
250 |
assertTrue(lock.hasContended()); |
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lock.release(1); |
252 |
Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(lock.hasContended()); |
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t1.join(); |
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t2.join(); |
256 |
} catch(Exception e){ |
257 |
unexpectedException(); |
258 |
} |
259 |
} |
260 |
|
261 |
/** |
262 |
* tryAcquireNanos is interruptible. |
263 |
*/ |
264 |
public void testInterruptedException2() { |
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final Mutex lock = new Mutex(); |
266 |
lock.acquire(1); |
267 |
Thread t = new Thread(new Runnable() { |
268 |
public void run() { |
269 |
try { |
270 |
lock.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000 * 1000); |
271 |
threadShouldThrow(); |
272 |
} catch(InterruptedException success){} |
273 |
} |
274 |
}); |
275 |
try { |
276 |
t.start(); |
277 |
t.interrupt(); |
278 |
} catch(Exception e){ |
279 |
unexpectedException(); |
280 |
} |
281 |
} |
282 |
|
283 |
|
284 |
/** |
285 |
* TryAcquire on a locked lock fails |
286 |
*/ |
287 |
public void testTryAcquireWhenLocked() { |
288 |
final Mutex lock = new Mutex(); |
289 |
lock.acquire(1); |
290 |
Thread t = new Thread(new Runnable() { |
291 |
public void run() { |
292 |
threadAssertFalse(lock.tryAcquire(1)); |
293 |
} |
294 |
}); |
295 |
try { |
296 |
t.start(); |
297 |
t.join(); |
298 |
lock.release(1); |
299 |
} catch(Exception e){ |
300 |
unexpectedException(); |
301 |
} |
302 |
} |
303 |
|
304 |
/** |
305 |
* tryAcquireNanos on a locked lock times out |
306 |
*/ |
307 |
public void testAcquireNanos_Timeout() { |
308 |
final Mutex lock = new Mutex(); |
309 |
lock.acquire(1); |
310 |
Thread t = new Thread(new Runnable() { |
311 |
public void run() { |
312 |
try { |
313 |
threadAssertFalse(lock.tryAcquireNanos(1, 1000 * 1000)); |
314 |
} catch (Exception ex) { |
315 |
threadUnexpectedException(); |
316 |
} |
317 |
} |
318 |
}); |
319 |
try { |
320 |
t.start(); |
321 |
t.join(); |
322 |
lock.release(1); |
323 |
} catch(Exception e){ |
324 |
unexpectedException(); |
325 |
} |
326 |
} |
327 |
|
328 |
|
329 |
/** |
330 |
* getState is true when acquired and false when not |
331 |
*/ |
332 |
public void testGetState() { |
333 |
final Mutex lock = new Mutex(); |
334 |
lock.acquire(1); |
335 |
assertTrue(lock.isHeldExclusively()); |
336 |
lock.release(1); |
337 |
assertFalse(lock.isHeldExclusively()); |
338 |
Thread t = new Thread(new Runnable() { |
339 |
public void run() { |
340 |
lock.acquire(1); |
341 |
try { |
342 |
Thread.sleep(SMALL_DELAY_MS); |
343 |
} |
344 |
catch(Exception e) { |
345 |
threadUnexpectedException(); |
346 |
} |
347 |
lock.release(1); |
348 |
} |
349 |
}); |
350 |
try { |
351 |
t.start(); |
352 |
Thread.sleep(SHORT_DELAY_MS); |
353 |
assertTrue(lock.isHeldExclusively()); |
354 |
t.join(); |
355 |
assertFalse(lock.isHeldExclusively()); |
356 |
} catch(Exception e){ |
357 |
unexpectedException(); |
358 |
} |
359 |
} |
360 |
|
361 |
|
362 |
/** |
363 |
* acquireInterruptibly is interruptible. |
364 |
*/ |
365 |
public void testAcquireInterruptibly1() { |
366 |
final Mutex lock = new Mutex(); |
367 |
lock.acquire(1); |
368 |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
369 |
try { |
370 |
t.start(); |
371 |
t.interrupt(); |
372 |
lock.release(1); |
373 |
t.join(); |
374 |
} catch(Exception e){ |
375 |
unexpectedException(); |
376 |
} |
377 |
} |
378 |
|
379 |
/** |
380 |
* acquireInterruptibly succeeds when released, else is interruptible |
381 |
*/ |
382 |
public void testAcquireInterruptibly2() { |
383 |
final Mutex lock = new Mutex(); |
384 |
try { |
385 |
lock.acquireInterruptibly(1); |
386 |
} catch(Exception e) { |
387 |
unexpectedException(); |
388 |
} |
389 |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
390 |
try { |
391 |
t.start(); |
392 |
t.interrupt(); |
393 |
assertTrue(lock.isHeldExclusively()); |
394 |
t.join(); |
395 |
} catch(Exception e){ |
396 |
unexpectedException(); |
397 |
} |
398 |
} |
399 |
|
400 |
/** |
401 |
* owns is true for a condition created by lock else false |
402 |
*/ |
403 |
public void testOwns() { |
404 |
final Mutex lock = new Mutex(); |
405 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
406 |
final Mutex lock2 = new Mutex(); |
407 |
assertTrue(lock.owns(c)); |
408 |
assertFalse(lock2.owns(c)); |
409 |
} |
410 |
|
411 |
/** |
412 |
* Calling await without holding lock throws IllegalMonitorStateException |
413 |
*/ |
414 |
public void testAwait_IllegalMonitor() { |
415 |
final Mutex lock = new Mutex(); |
416 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
417 |
try { |
418 |
c.await(); |
419 |
shouldThrow(); |
420 |
} |
421 |
catch (IllegalMonitorStateException success) { |
422 |
} |
423 |
catch (Exception ex) { |
424 |
unexpectedException(); |
425 |
} |
426 |
} |
427 |
|
428 |
/** |
429 |
* Calling signal without holding lock throws IllegalMonitorStateException |
430 |
*/ |
431 |
public void testSignal_IllegalMonitor() { |
432 |
final Mutex lock = new Mutex(); |
433 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
434 |
try { |
435 |
c.signal(); |
436 |
shouldThrow(); |
437 |
} |
438 |
catch (IllegalMonitorStateException success) { |
439 |
} |
440 |
catch (Exception ex) { |
441 |
unexpectedException(); |
442 |
} |
443 |
} |
444 |
|
445 |
/** |
446 |
* awaitNanos without a signal times out |
447 |
*/ |
448 |
public void testAwaitNanos_Timeout() { |
449 |
final Mutex lock = new Mutex(); |
450 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
451 |
try { |
452 |
lock.acquire(1); |
453 |
long t = c.awaitNanos(100); |
454 |
assertTrue(t <= 0); |
455 |
lock.release(1); |
456 |
} |
457 |
catch (Exception ex) { |
458 |
unexpectedException(); |
459 |
} |
460 |
} |
461 |
|
462 |
/** |
463 |
* timed await without a signal times out |
464 |
*/ |
465 |
public void testAwait_Timeout() { |
466 |
final Mutex lock = new Mutex(); |
467 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
468 |
try { |
469 |
lock.acquire(1); |
470 |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
471 |
lock.release(1); |
472 |
} |
473 |
catch (Exception ex) { |
474 |
unexpectedException(); |
475 |
} |
476 |
} |
477 |
|
478 |
/** |
479 |
* awaitUntil without a signal times out |
480 |
*/ |
481 |
public void testAwaitUntil_Timeout() { |
482 |
final Mutex lock = new Mutex(); |
483 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
484 |
try { |
485 |
lock.acquire(1); |
486 |
java.util.Date d = new java.util.Date(); |
487 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
488 |
lock.release(1); |
489 |
} |
490 |
catch (Exception ex) { |
491 |
unexpectedException(); |
492 |
} |
493 |
} |
494 |
|
495 |
/** |
496 |
* await returns when signalled |
497 |
*/ |
498 |
public void testAwait() { |
499 |
final Mutex lock = new Mutex(); |
500 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
501 |
Thread t = new Thread(new Runnable() { |
502 |
public void run() { |
503 |
try { |
504 |
lock.acquire(1); |
505 |
c.await(); |
506 |
lock.release(1); |
507 |
} |
508 |
catch(InterruptedException e) { |
509 |
threadUnexpectedException(); |
510 |
} |
511 |
} |
512 |
}); |
513 |
|
514 |
try { |
515 |
t.start(); |
516 |
Thread.sleep(SHORT_DELAY_MS); |
517 |
lock.acquire(1); |
518 |
c.signal(); |
519 |
lock.release(1); |
520 |
t.join(SHORT_DELAY_MS); |
521 |
assertFalse(t.isAlive()); |
522 |
} |
523 |
catch (Exception ex) { |
524 |
unexpectedException(); |
525 |
} |
526 |
} |
527 |
|
528 |
|
529 |
|
530 |
/** |
531 |
* hasWaiters throws NPE if null |
532 |
*/ |
533 |
public void testHasWaitersNPE() { |
534 |
final Mutex lock = new Mutex(); |
535 |
try { |
536 |
lock.hasWaiters(null); |
537 |
shouldThrow(); |
538 |
} catch (NullPointerException success) { |
539 |
} catch (Exception ex) { |
540 |
unexpectedException(); |
541 |
} |
542 |
} |
543 |
|
544 |
/** |
545 |
* getWaitQueueLength throws NPE if null |
546 |
*/ |
547 |
public void testGetWaitQueueLengthNPE() { |
548 |
final Mutex lock = new Mutex(); |
549 |
try { |
550 |
lock.getWaitQueueLength(null); |
551 |
shouldThrow(); |
552 |
} catch (NullPointerException success) { |
553 |
} catch (Exception ex) { |
554 |
unexpectedException(); |
555 |
} |
556 |
} |
557 |
|
558 |
|
559 |
/** |
560 |
* getWaitingThreads throws NPE if null |
561 |
*/ |
562 |
public void testGetWaitingThreadsNPE() { |
563 |
final Mutex lock = new Mutex(); |
564 |
try { |
565 |
lock.getWaitingThreads(null); |
566 |
shouldThrow(); |
567 |
} catch (NullPointerException success) { |
568 |
} catch (Exception ex) { |
569 |
unexpectedException(); |
570 |
} |
571 |
} |
572 |
|
573 |
|
574 |
/** |
575 |
* hasWaiters throws IAE if not owned |
576 |
*/ |
577 |
public void testHasWaitersIAE() { |
578 |
final Mutex lock = new Mutex(); |
579 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
580 |
final Mutex lock2 = new Mutex(); |
581 |
try { |
582 |
lock2.hasWaiters(c); |
583 |
shouldThrow(); |
584 |
} catch (IllegalArgumentException success) { |
585 |
} catch (Exception ex) { |
586 |
unexpectedException(); |
587 |
} |
588 |
} |
589 |
|
590 |
/** |
591 |
* hasWaiters throws IMSE if not locked |
592 |
*/ |
593 |
public void testHasWaitersIMSE() { |
594 |
final Mutex lock = new Mutex(); |
595 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
596 |
try { |
597 |
lock.hasWaiters(c); |
598 |
shouldThrow(); |
599 |
} catch (IllegalMonitorStateException success) { |
600 |
} catch (Exception ex) { |
601 |
unexpectedException(); |
602 |
} |
603 |
} |
604 |
|
605 |
|
606 |
/** |
607 |
* getWaitQueueLength throws IAE if not owned |
608 |
*/ |
609 |
public void testGetWaitQueueLengthIAE() { |
610 |
final Mutex lock = new Mutex(); |
611 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
612 |
final Mutex lock2 = new Mutex(); |
613 |
try { |
614 |
lock2.getWaitQueueLength(c); |
615 |
shouldThrow(); |
616 |
} catch (IllegalArgumentException success) { |
617 |
} catch (Exception ex) { |
618 |
unexpectedException(); |
619 |
} |
620 |
} |
621 |
|
622 |
/** |
623 |
* getWaitQueueLength throws IMSE if not locked |
624 |
*/ |
625 |
public void testGetWaitQueueLengthIMSE() { |
626 |
final Mutex lock = new Mutex(); |
627 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
628 |
try { |
629 |
lock.getWaitQueueLength(c); |
630 |
shouldThrow(); |
631 |
} catch (IllegalMonitorStateException success) { |
632 |
} catch (Exception ex) { |
633 |
unexpectedException(); |
634 |
} |
635 |
} |
636 |
|
637 |
|
638 |
/** |
639 |
* getWaitingThreads throws IAE if not owned |
640 |
*/ |
641 |
public void testGetWaitingThreadsIAE() { |
642 |
final Mutex lock = new Mutex(); |
643 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
644 |
final Mutex lock2 = new Mutex(); |
645 |
try { |
646 |
lock2.getWaitingThreads(c); |
647 |
shouldThrow(); |
648 |
} catch (IllegalArgumentException success) { |
649 |
} catch (Exception ex) { |
650 |
unexpectedException(); |
651 |
} |
652 |
} |
653 |
|
654 |
/** |
655 |
* getWaitingThreads throws IMSE if not locked |
656 |
*/ |
657 |
public void testGetWaitingThreadsIMSE() { |
658 |
final Mutex lock = new Mutex(); |
659 |
final AbstractQueuedSynchronizer.ConditionObject c = (lock.newCondition()); |
660 |
try { |
661 |
lock.getWaitingThreads(c); |
662 |
shouldThrow(); |
663 |
} catch (IllegalMonitorStateException success) { |
664 |
} catch (Exception ex) { |
665 |
unexpectedException(); |
666 |
} |
667 |
} |
668 |
|
669 |
|
670 |
|
671 |
/** |
672 |
* hasWaiters returns true when a thread is waiting, else false |
673 |
*/ |
674 |
public void testHasWaiters() { |
675 |
final Mutex lock = new Mutex(); |
676 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
677 |
Thread t = new Thread(new Runnable() { |
678 |
public void run() { |
679 |
try { |
680 |
lock.acquire(1); |
681 |
threadAssertFalse(lock.hasWaiters(c)); |
682 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
683 |
c.await(); |
684 |
lock.release(1); |
685 |
} |
686 |
catch(InterruptedException e) { |
687 |
threadUnexpectedException(); |
688 |
} |
689 |
} |
690 |
}); |
691 |
|
692 |
try { |
693 |
t.start(); |
694 |
Thread.sleep(SHORT_DELAY_MS); |
695 |
lock.acquire(1); |
696 |
assertTrue(lock.hasWaiters(c)); |
697 |
assertEquals(1, lock.getWaitQueueLength(c)); |
698 |
c.signal(); |
699 |
lock.release(1); |
700 |
Thread.sleep(SHORT_DELAY_MS); |
701 |
lock.acquire(1); |
702 |
assertFalse(lock.hasWaiters(c)); |
703 |
assertEquals(0, lock.getWaitQueueLength(c)); |
704 |
lock.release(1); |
705 |
t.join(SHORT_DELAY_MS); |
706 |
assertFalse(t.isAlive()); |
707 |
} |
708 |
catch (Exception ex) { |
709 |
unexpectedException(); |
710 |
} |
711 |
} |
712 |
|
713 |
/** |
714 |
* getWaitQueueLength returns number of waiting threads |
715 |
*/ |
716 |
public void testGetWaitQueueLength() { |
717 |
final Mutex lock = new Mutex(); |
718 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
719 |
Thread t1 = new Thread(new Runnable() { |
720 |
public void run() { |
721 |
try { |
722 |
lock.acquire(1); |
723 |
threadAssertFalse(lock.hasWaiters(c)); |
724 |
threadAssertEquals(0, lock.getWaitQueueLength(c)); |
725 |
c.await(); |
726 |
lock.release(1); |
727 |
} |
728 |
catch(InterruptedException e) { |
729 |
threadUnexpectedException(); |
730 |
} |
731 |
} |
732 |
}); |
733 |
|
734 |
Thread t2 = new Thread(new Runnable() { |
735 |
public void run() { |
736 |
try { |
737 |
lock.acquire(1); |
738 |
threadAssertTrue(lock.hasWaiters(c)); |
739 |
threadAssertEquals(1, lock.getWaitQueueLength(c)); |
740 |
c.await(); |
741 |
lock.release(1); |
742 |
} |
743 |
catch(InterruptedException e) { |
744 |
threadUnexpectedException(); |
745 |
} |
746 |
} |
747 |
}); |
748 |
|
749 |
try { |
750 |
t1.start(); |
751 |
Thread.sleep(SHORT_DELAY_MS); |
752 |
t2.start(); |
753 |
Thread.sleep(SHORT_DELAY_MS); |
754 |
lock.acquire(1); |
755 |
assertTrue(lock.hasWaiters(c)); |
756 |
assertEquals(2, lock.getWaitQueueLength(c)); |
757 |
c.signalAll(); |
758 |
lock.release(1); |
759 |
Thread.sleep(SHORT_DELAY_MS); |
760 |
lock.acquire(1); |
761 |
assertFalse(lock.hasWaiters(c)); |
762 |
assertEquals(0, lock.getWaitQueueLength(c)); |
763 |
lock.release(1); |
764 |
t1.join(SHORT_DELAY_MS); |
765 |
t2.join(SHORT_DELAY_MS); |
766 |
assertFalse(t1.isAlive()); |
767 |
assertFalse(t2.isAlive()); |
768 |
} |
769 |
catch (Exception ex) { |
770 |
unexpectedException(); |
771 |
} |
772 |
} |
773 |
|
774 |
/** |
775 |
* getWaitingThreads returns only and all waiting threads |
776 |
*/ |
777 |
public void testGetWaitingThreads() { |
778 |
final Mutex lock = new Mutex(); |
779 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
780 |
Thread t1 = new Thread(new Runnable() { |
781 |
public void run() { |
782 |
try { |
783 |
lock.acquire(1); |
784 |
threadAssertTrue(lock.getWaitingThreads(c).isEmpty()); |
785 |
c.await(); |
786 |
lock.release(1); |
787 |
} |
788 |
catch(InterruptedException e) { |
789 |
threadUnexpectedException(); |
790 |
} |
791 |
} |
792 |
}); |
793 |
|
794 |
Thread t2 = new Thread(new Runnable() { |
795 |
public void run() { |
796 |
try { |
797 |
lock.acquire(1); |
798 |
threadAssertFalse(lock.getWaitingThreads(c).isEmpty()); |
799 |
c.await(); |
800 |
lock.release(1); |
801 |
} |
802 |
catch(InterruptedException e) { |
803 |
threadUnexpectedException(); |
804 |
} |
805 |
} |
806 |
}); |
807 |
|
808 |
try { |
809 |
lock.acquire(1); |
810 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
811 |
lock.release(1); |
812 |
t1.start(); |
813 |
Thread.sleep(SHORT_DELAY_MS); |
814 |
t2.start(); |
815 |
Thread.sleep(SHORT_DELAY_MS); |
816 |
lock.acquire(1); |
817 |
assertTrue(lock.hasWaiters(c)); |
818 |
assertTrue(lock.getWaitingThreads(c).contains(t1)); |
819 |
assertTrue(lock.getWaitingThreads(c).contains(t2)); |
820 |
c.signalAll(); |
821 |
lock.release(1); |
822 |
Thread.sleep(SHORT_DELAY_MS); |
823 |
lock.acquire(1); |
824 |
assertFalse(lock.hasWaiters(c)); |
825 |
assertTrue(lock.getWaitingThreads(c).isEmpty()); |
826 |
lock.release(1); |
827 |
t1.join(SHORT_DELAY_MS); |
828 |
t2.join(SHORT_DELAY_MS); |
829 |
assertFalse(t1.isAlive()); |
830 |
assertFalse(t2.isAlive()); |
831 |
} |
832 |
catch (Exception ex) { |
833 |
unexpectedException(); |
834 |
} |
835 |
} |
836 |
|
837 |
|
838 |
|
839 |
/** |
840 |
* awaitUninterruptibly doesn't abort on interrupt |
841 |
*/ |
842 |
public void testAwaitUninterruptibly() { |
843 |
final Mutex lock = new Mutex(); |
844 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
845 |
Thread t = new Thread(new Runnable() { |
846 |
public void run() { |
847 |
lock.acquire(1); |
848 |
c.awaitUninterruptibly(); |
849 |
lock.release(1); |
850 |
} |
851 |
}); |
852 |
|
853 |
try { |
854 |
t.start(); |
855 |
Thread.sleep(SHORT_DELAY_MS); |
856 |
t.interrupt(); |
857 |
lock.acquire(1); |
858 |
c.signal(); |
859 |
lock.release(1); |
860 |
assert(t.isInterrupted()); |
861 |
t.join(SHORT_DELAY_MS); |
862 |
assertFalse(t.isAlive()); |
863 |
} |
864 |
catch (Exception ex) { |
865 |
unexpectedException(); |
866 |
} |
867 |
} |
868 |
|
869 |
/** |
870 |
* await is interruptible |
871 |
*/ |
872 |
public void testAwait_Interrupt() { |
873 |
final Mutex lock = new Mutex(); |
874 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
875 |
Thread t = new Thread(new Runnable() { |
876 |
public void run() { |
877 |
try { |
878 |
lock.acquire(1); |
879 |
c.await(); |
880 |
lock.release(1); |
881 |
threadShouldThrow(); |
882 |
} |
883 |
catch(InterruptedException success) { |
884 |
} |
885 |
} |
886 |
}); |
887 |
|
888 |
try { |
889 |
t.start(); |
890 |
Thread.sleep(SHORT_DELAY_MS); |
891 |
t.interrupt(); |
892 |
t.join(SHORT_DELAY_MS); |
893 |
assertFalse(t.isAlive()); |
894 |
} |
895 |
catch (Exception ex) { |
896 |
unexpectedException(); |
897 |
} |
898 |
} |
899 |
|
900 |
/** |
901 |
* awaitNanos is interruptible |
902 |
*/ |
903 |
public void testAwaitNanos_Interrupt() { |
904 |
final Mutex lock = new Mutex(); |
905 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
906 |
Thread t = new Thread(new Runnable() { |
907 |
public void run() { |
908 |
try { |
909 |
lock.acquire(1); |
910 |
c.awaitNanos(1000 * 1000 * 1000); // 1 sec |
911 |
lock.release(1); |
912 |
threadShouldThrow(); |
913 |
} |
914 |
catch(InterruptedException success) { |
915 |
} |
916 |
} |
917 |
}); |
918 |
|
919 |
try { |
920 |
t.start(); |
921 |
Thread.sleep(SHORT_DELAY_MS); |
922 |
t.interrupt(); |
923 |
t.join(SHORT_DELAY_MS); |
924 |
assertFalse(t.isAlive()); |
925 |
} |
926 |
catch (Exception ex) { |
927 |
unexpectedException(); |
928 |
} |
929 |
} |
930 |
|
931 |
/** |
932 |
* awaitUntil is interruptible |
933 |
*/ |
934 |
public void testAwaitUntil_Interrupt() { |
935 |
final Mutex lock = new Mutex(); |
936 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
937 |
Thread t = new Thread(new Runnable() { |
938 |
public void run() { |
939 |
try { |
940 |
lock.acquire(1); |
941 |
java.util.Date d = new java.util.Date(); |
942 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
943 |
lock.release(1); |
944 |
threadShouldThrow(); |
945 |
} |
946 |
catch(InterruptedException success) { |
947 |
} |
948 |
} |
949 |
}); |
950 |
|
951 |
try { |
952 |
t.start(); |
953 |
Thread.sleep(SHORT_DELAY_MS); |
954 |
t.interrupt(); |
955 |
t.join(SHORT_DELAY_MS); |
956 |
assertFalse(t.isAlive()); |
957 |
} |
958 |
catch (Exception ex) { |
959 |
unexpectedException(); |
960 |
} |
961 |
} |
962 |
|
963 |
/** |
964 |
* signalAll wakes up all threads |
965 |
*/ |
966 |
public void testSignalAll() { |
967 |
final Mutex lock = new Mutex(); |
968 |
final AbstractQueuedSynchronizer.ConditionObject c = lock.newCondition(); |
969 |
Thread t1 = new Thread(new Runnable() { |
970 |
public void run() { |
971 |
try { |
972 |
lock.acquire(1); |
973 |
c.await(); |
974 |
lock.release(1); |
975 |
} |
976 |
catch(InterruptedException e) { |
977 |
threadUnexpectedException(); |
978 |
} |
979 |
} |
980 |
}); |
981 |
|
982 |
Thread t2 = new Thread(new Runnable() { |
983 |
public void run() { |
984 |
try { |
985 |
lock.acquire(1); |
986 |
c.await(); |
987 |
lock.release(1); |
988 |
} |
989 |
catch(InterruptedException e) { |
990 |
threadUnexpectedException(); |
991 |
} |
992 |
} |
993 |
}); |
994 |
|
995 |
try { |
996 |
t1.start(); |
997 |
t2.start(); |
998 |
Thread.sleep(SHORT_DELAY_MS); |
999 |
lock.acquire(1); |
1000 |
c.signalAll(); |
1001 |
lock.release(1); |
1002 |
t1.join(SHORT_DELAY_MS); |
1003 |
t2.join(SHORT_DELAY_MS); |
1004 |
assertFalse(t1.isAlive()); |
1005 |
assertFalse(t2.isAlive()); |
1006 |
} |
1007 |
catch (Exception ex) { |
1008 |
unexpectedException(); |
1009 |
} |
1010 |
} |
1011 |
|
1012 |
|
1013 |
/** |
1014 |
* toString indicates current state |
1015 |
*/ |
1016 |
public void testToString() { |
1017 |
Mutex lock = new Mutex(); |
1018 |
String us = lock.toString(); |
1019 |
assertTrue(us.indexOf("State = 0") >= 0); |
1020 |
lock.acquire(1); |
1021 |
String ls = lock.toString(); |
1022 |
assertTrue(ls.indexOf("State = 1") >= 0); |
1023 |
} |
1024 |
|
1025 |
/** |
1026 |
* A serialized AQS deserializes with current state |
1027 |
*/ |
1028 |
public void testSerialization() { |
1029 |
Mutex l = new Mutex(); |
1030 |
l.acquire(1); |
1031 |
assertTrue(l.isHeldExclusively()); |
1032 |
|
1033 |
try { |
1034 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
1035 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
1036 |
out.writeObject(l); |
1037 |
out.close(); |
1038 |
|
1039 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
1040 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
1041 |
Mutex r = (Mutex) in.readObject(); |
1042 |
assertTrue(r.isHeldExclusively()); |
1043 |
} catch(Exception e){ |
1044 |
e.printStackTrace(); |
1045 |
unexpectedException(); |
1046 |
} |
1047 |
} |
1048 |
|
1049 |
|
1050 |
/** |
1051 |
* tryReleaseShared setting state changes getState |
1052 |
*/ |
1053 |
public void testGetStateWithReleaseShared() { |
1054 |
final BooleanLatch l = new BooleanLatch(); |
1055 |
assertFalse(l.isSignalled()); |
1056 |
l.releaseShared(0); |
1057 |
assertTrue(l.isSignalled()); |
1058 |
} |
1059 |
|
1060 |
/** |
1061 |
* release and has no effect when already signalled |
1062 |
*/ |
1063 |
public void testReleaseShared() { |
1064 |
final BooleanLatch l = new BooleanLatch(); |
1065 |
assertFalse(l.isSignalled()); |
1066 |
l.releaseShared(0); |
1067 |
assertTrue(l.isSignalled()); |
1068 |
l.releaseShared(0); |
1069 |
assertTrue(l.isSignalled()); |
1070 |
} |
1071 |
|
1072 |
/** |
1073 |
* acquireSharedInterruptibly returns after release, but not before |
1074 |
*/ |
1075 |
public void testAcquireSharedInterruptibly() { |
1076 |
final BooleanLatch l = new BooleanLatch(); |
1077 |
|
1078 |
Thread t = new Thread(new Runnable() { |
1079 |
public void run() { |
1080 |
try { |
1081 |
threadAssertFalse(l.isSignalled()); |
1082 |
l.acquireSharedInterruptibly(0); |
1083 |
threadAssertTrue(l.isSignalled()); |
1084 |
} catch(InterruptedException e){ |
1085 |
threadUnexpectedException(); |
1086 |
} |
1087 |
} |
1088 |
}); |
1089 |
try { |
1090 |
t.start(); |
1091 |
assertFalse(l.isSignalled()); |
1092 |
Thread.sleep(SHORT_DELAY_MS); |
1093 |
l.releaseShared(0); |
1094 |
assertTrue(l.isSignalled()); |
1095 |
t.join(); |
1096 |
} catch (InterruptedException e){ |
1097 |
unexpectedException(); |
1098 |
} |
1099 |
} |
1100 |
|
1101 |
|
1102 |
/** |
1103 |
* acquireSharedTimed returns after release |
1104 |
*/ |
1105 |
public void testAsquireSharedTimed() { |
1106 |
final BooleanLatch l = new BooleanLatch(); |
1107 |
|
1108 |
Thread t = new Thread(new Runnable() { |
1109 |
public void run() { |
1110 |
try { |
1111 |
threadAssertFalse(l.isSignalled()); |
1112 |
threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000)); |
1113 |
threadAssertTrue(l.isSignalled()); |
1114 |
|
1115 |
} catch(InterruptedException e){ |
1116 |
threadUnexpectedException(); |
1117 |
} |
1118 |
} |
1119 |
}); |
1120 |
try { |
1121 |
t.start(); |
1122 |
assertFalse(l.isSignalled()); |
1123 |
Thread.sleep(SHORT_DELAY_MS); |
1124 |
l.releaseShared(0); |
1125 |
assertTrue(l.isSignalled()); |
1126 |
t.join(); |
1127 |
} catch (InterruptedException e){ |
1128 |
unexpectedException(); |
1129 |
} |
1130 |
} |
1131 |
|
1132 |
/** |
1133 |
* acquireSharedInterruptibly throws IE if interrupted before released |
1134 |
*/ |
1135 |
public void testAcquireSharedInterruptibly_InterruptedException() { |
1136 |
final BooleanLatch l = new BooleanLatch(); |
1137 |
Thread t = new Thread(new Runnable() { |
1138 |
public void run() { |
1139 |
try { |
1140 |
threadAssertFalse(l.isSignalled()); |
1141 |
l.acquireSharedInterruptibly(0); |
1142 |
threadShouldThrow(); |
1143 |
} catch(InterruptedException success){} |
1144 |
} |
1145 |
}); |
1146 |
t.start(); |
1147 |
try { |
1148 |
assertFalse(l.isSignalled()); |
1149 |
t.interrupt(); |
1150 |
t.join(); |
1151 |
} catch (InterruptedException e){ |
1152 |
unexpectedException(); |
1153 |
} |
1154 |
} |
1155 |
|
1156 |
/** |
1157 |
* acquireSharedTimed throws IE if interrupted before released |
1158 |
*/ |
1159 |
public void testAcquireSharedNanos_InterruptedException() { |
1160 |
final BooleanLatch l = new BooleanLatch(); |
1161 |
Thread t = new Thread(new Runnable() { |
1162 |
public void run() { |
1163 |
try { |
1164 |
threadAssertFalse(l.isSignalled()); |
1165 |
l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000); |
1166 |
threadShouldThrow(); |
1167 |
} catch(InterruptedException success){} |
1168 |
} |
1169 |
}); |
1170 |
t.start(); |
1171 |
try { |
1172 |
Thread.sleep(SHORT_DELAY_MS); |
1173 |
assertFalse(l.isSignalled()); |
1174 |
t.interrupt(); |
1175 |
t.join(); |
1176 |
} catch (InterruptedException e){ |
1177 |
unexpectedException(); |
1178 |
} |
1179 |
} |
1180 |
|
1181 |
/** |
1182 |
* acquireSharedTimed times out if not released before timeout |
1183 |
*/ |
1184 |
public void testAcquireSharedNanos_Timeout() { |
1185 |
final BooleanLatch l = new BooleanLatch(); |
1186 |
Thread t = new Thread(new Runnable() { |
1187 |
public void run() { |
1188 |
try { |
1189 |
threadAssertFalse(l.isSignalled()); |
1190 |
threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000)); |
1191 |
} catch(InterruptedException ie){ |
1192 |
threadUnexpectedException(); |
1193 |
} |
1194 |
} |
1195 |
}); |
1196 |
t.start(); |
1197 |
try { |
1198 |
Thread.sleep(SHORT_DELAY_MS); |
1199 |
assertFalse(l.isSignalled()); |
1200 |
t.join(); |
1201 |
} catch (InterruptedException e){ |
1202 |
unexpectedException(); |
1203 |
} |
1204 |
} |
1205 |
|
1206 |
|
1207 |
} |