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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 static java.util.concurrent.TimeUnit.MILLISECONDS; |
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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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} |
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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 that does not expect to |
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* be interrupted. |
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*/ |
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class InterruptibleSyncRunnable extends CheckedRunnable { |
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final Mutex sync; |
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InterruptibleSyncRunnable(Mutex l) { sync = l; } |
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public void realRun() throws InterruptedException { |
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sync.acquireInterruptibly(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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* A runnable calling acquireInterruptibly that expects to be |
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* interrupted. |
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*/ |
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class InterruptedSyncRunnable extends CheckedInterruptedRunnable { |
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final Mutex sync; |
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InterruptedSyncRunnable(Mutex l) { sync = l; } |
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public void realRun() throws InterruptedException { |
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sync.acquireInterruptibly(1); |
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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 sync 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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assertFalse(rl.isHeldExclusively()); |
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} |
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|
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/** |
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* tryAcquire on an released sync 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 |
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*/ |
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public void testhasQueuedThreads() throws InterruptedException { |
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final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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assertFalse(sync.hasQueuedThreads()); |
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sync.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThreads()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThreads()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasQueuedThreads()); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.hasQueuedThreads()); |
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t1.join(); |
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t2.join(); |
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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 sync = new Mutex(); |
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try { |
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sync.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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* isQueued reports whether a thread is queued. |
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*/ |
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public void testIsQueued() throws InterruptedException { |
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final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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assertFalse(sync.isQueued(t1)); |
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assertFalse(sync.isQueued(t2)); |
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sync.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.isQueued(t1)); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.isQueued(t1)); |
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assertTrue(sync.isQueued(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.isQueued(t1)); |
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assertTrue(sync.isQueued(t2)); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.isQueued(t1)); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.isQueued(t2)); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* getFirstQueuedThread returns first waiting thread or null if none |
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*/ |
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public void testGetFirstQueuedThread() throws InterruptedException { |
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final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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assertNull(sync.getFirstQueuedThread()); |
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sync.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t1, sync.getFirstQueuedThread()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t1, sync.getFirstQueuedThread()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertEquals(t2, sync.getFirstQueuedThread()); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertNull(sync.getFirstQueuedThread()); |
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t1.join(); |
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t2.join(); |
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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() throws InterruptedException { |
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final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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assertFalse(sync.hasContended()); |
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sync.acquire(1); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasContended()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasContended()); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasContended()); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.hasContended()); |
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t1.join(); |
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t2.join(); |
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} |
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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 Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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assertTrue(sync.getQueuedThreads().isEmpty()); |
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sync.acquire(1); |
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assertTrue(sync.getQueuedThreads().isEmpty()); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getQueuedThreads().contains(t1)); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getQueuedThreads().contains(t1)); |
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assertTrue(sync.getQueuedThreads().contains(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.getQueuedThreads().contains(t1)); |
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assertTrue(sync.getQueuedThreads().contains(t2)); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getQueuedThreads().isEmpty()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* getExclusiveQueuedThreads includes waiting threads |
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*/ |
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public void testGetExclusiveQueuedThreads() throws InterruptedException { |
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final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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sync.acquire(1); |
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assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
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t1.interrupt(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertFalse(sync.getExclusiveQueuedThreads().contains(t1)); |
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assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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t1.join(); |
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t2.join(); |
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} |
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|
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/** |
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* getSharedQueuedThreads does not include exclusively waiting threads |
298 |
*/ |
299 |
public void testGetSharedQueuedThreads() throws InterruptedException { |
300 |
final Mutex sync = new Mutex(); |
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Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
302 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
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assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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sync.acquire(1); |
305 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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t1.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
311 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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t1.interrupt(); |
313 |
Thread.sleep(SHORT_DELAY_MS); |
314 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
315 |
sync.release(1); |
316 |
Thread.sleep(SHORT_DELAY_MS); |
317 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
318 |
t1.join(); |
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t2.join(); |
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} |
321 |
|
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/** |
323 |
* tryAcquireNanos is interruptible. |
324 |
*/ |
325 |
public void testInterruptedException2() throws InterruptedException { |
326 |
final Mutex sync = new Mutex(); |
327 |
sync.acquire(1); |
328 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
329 |
public void realRun() throws InterruptedException { |
330 |
sync.tryAcquireNanos(1, MEDIUM_DELAY_MS * 1000L * 1000L); |
331 |
}}); |
332 |
|
333 |
t.start(); |
334 |
Thread.sleep(SHORT_DELAY_MS); |
335 |
t.interrupt(); |
336 |
t.join(); |
337 |
} |
338 |
|
339 |
|
340 |
/** |
341 |
* TryAcquire on exclusively held sync fails |
342 |
*/ |
343 |
public void testTryAcquireWhenSynced() throws InterruptedException { |
344 |
final Mutex sync = new Mutex(); |
345 |
sync.acquire(1); |
346 |
Thread t = new Thread(new CheckedRunnable() { |
347 |
public void realRun() { |
348 |
threadAssertFalse(sync.tryAcquire(1)); |
349 |
}}); |
350 |
|
351 |
t.start(); |
352 |
t.join(); |
353 |
sync.release(1); |
354 |
} |
355 |
|
356 |
/** |
357 |
* tryAcquireNanos on an exclusively held sync times out |
358 |
*/ |
359 |
public void testAcquireNanos_Timeout() throws InterruptedException { |
360 |
final Mutex sync = new Mutex(); |
361 |
sync.acquire(1); |
362 |
Thread t = new Thread(new CheckedRunnable() { |
363 |
public void realRun() throws InterruptedException { |
364 |
threadAssertFalse(sync.tryAcquireNanos(1, SHORT_DELAY_MS * 1000L * 1000L)); |
365 |
}}); |
366 |
|
367 |
t.start(); |
368 |
t.join(); |
369 |
sync.release(1); |
370 |
} |
371 |
|
372 |
|
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/** |
374 |
* getState is true when acquired and false when not |
375 |
*/ |
376 |
public void testGetState() throws InterruptedException { |
377 |
final Mutex sync = new Mutex(); |
378 |
sync.acquire(1); |
379 |
assertTrue(sync.isHeldExclusively()); |
380 |
sync.release(1); |
381 |
assertFalse(sync.isHeldExclusively()); |
382 |
Thread t = new Thread(new CheckedRunnable() { |
383 |
public void realRun() throws InterruptedException { |
384 |
sync.acquire(1); |
385 |
Thread.sleep(SMALL_DELAY_MS); |
386 |
sync.release(1); |
387 |
}}); |
388 |
|
389 |
t.start(); |
390 |
Thread.sleep(SHORT_DELAY_MS); |
391 |
assertTrue(sync.isHeldExclusively()); |
392 |
t.join(); |
393 |
assertFalse(sync.isHeldExclusively()); |
394 |
} |
395 |
|
396 |
|
397 |
/** |
398 |
* acquireInterruptibly is interruptible. |
399 |
*/ |
400 |
public void testAcquireInterruptibly1() throws InterruptedException { |
401 |
final Mutex sync = new Mutex(); |
402 |
sync.acquire(1); |
403 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
404 |
|
405 |
t.start(); |
406 |
Thread.sleep(SHORT_DELAY_MS); |
407 |
t.interrupt(); |
408 |
Thread.sleep(SHORT_DELAY_MS); |
409 |
sync.release(1); |
410 |
t.join(); |
411 |
} |
412 |
|
413 |
/** |
414 |
* acquireInterruptibly succeeds when released, else is interruptible |
415 |
*/ |
416 |
public void testAcquireInterruptibly2() throws InterruptedException { |
417 |
final Mutex sync = new Mutex(); |
418 |
sync.acquireInterruptibly(1); |
419 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
420 |
t.start(); |
421 |
Thread.sleep(SHORT_DELAY_MS); |
422 |
t.interrupt(); |
423 |
assertTrue(sync.isHeldExclusively()); |
424 |
t.join(); |
425 |
} |
426 |
|
427 |
/** |
428 |
* owns is true for a condition created by sync else false |
429 |
*/ |
430 |
public void testOwns() { |
431 |
final Mutex sync = new Mutex(); |
432 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
433 |
final Mutex sync2 = new Mutex(); |
434 |
assertTrue(sync.owns(c)); |
435 |
assertFalse(sync2.owns(c)); |
436 |
} |
437 |
|
438 |
/** |
439 |
* Calling await without holding sync throws IllegalMonitorStateException |
440 |
*/ |
441 |
public void testAwait_IllegalMonitor() throws InterruptedException { |
442 |
final Mutex sync = new Mutex(); |
443 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
444 |
try { |
445 |
c.await(); |
446 |
shouldThrow(); |
447 |
} catch (IllegalMonitorStateException success) {} |
448 |
} |
449 |
|
450 |
/** |
451 |
* Calling signal without holding sync throws IllegalMonitorStateException |
452 |
*/ |
453 |
public void testSignal_IllegalMonitor() { |
454 |
final Mutex sync = new Mutex(); |
455 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
456 |
try { |
457 |
c.signal(); |
458 |
shouldThrow(); |
459 |
} catch (IllegalMonitorStateException success) {} |
460 |
} |
461 |
|
462 |
/** |
463 |
* awaitNanos without a signal times out |
464 |
*/ |
465 |
public void testAwaitNanos_Timeout() throws InterruptedException { |
466 |
final Mutex sync = new Mutex(); |
467 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
468 |
sync.acquire(1); |
469 |
long t = c.awaitNanos(100); |
470 |
assertTrue(t <= 0); |
471 |
sync.release(1); |
472 |
} |
473 |
|
474 |
/** |
475 |
* Timed await without a signal times out |
476 |
*/ |
477 |
public void testAwait_Timeout() throws InterruptedException { |
478 |
final Mutex sync = new Mutex(); |
479 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
480 |
sync.acquire(1); |
481 |
assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS)); |
482 |
sync.release(1); |
483 |
} |
484 |
|
485 |
/** |
486 |
* awaitUntil without a signal times out |
487 |
*/ |
488 |
public void testAwaitUntil_Timeout() throws InterruptedException { |
489 |
final Mutex sync = new Mutex(); |
490 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
491 |
sync.acquire(1); |
492 |
java.util.Date d = new java.util.Date(); |
493 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
494 |
sync.release(1); |
495 |
} |
496 |
|
497 |
/** |
498 |
* await returns when signalled |
499 |
*/ |
500 |
public void testAwait() throws InterruptedException { |
501 |
final Mutex sync = new Mutex(); |
502 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
503 |
Thread t = new Thread(new CheckedRunnable() { |
504 |
public void realRun() throws InterruptedException { |
505 |
sync.acquire(1); |
506 |
c.await(); |
507 |
sync.release(1); |
508 |
}}); |
509 |
|
510 |
t.start(); |
511 |
Thread.sleep(SHORT_DELAY_MS); |
512 |
sync.acquire(1); |
513 |
c.signal(); |
514 |
sync.release(1); |
515 |
t.join(SHORT_DELAY_MS); |
516 |
assertFalse(t.isAlive()); |
517 |
} |
518 |
|
519 |
|
520 |
|
521 |
/** |
522 |
* hasWaiters throws NPE if null |
523 |
*/ |
524 |
public void testHasWaitersNPE() { |
525 |
final Mutex sync = new Mutex(); |
526 |
try { |
527 |
sync.hasWaiters(null); |
528 |
shouldThrow(); |
529 |
} catch (NullPointerException success) {} |
530 |
} |
531 |
|
532 |
/** |
533 |
* getWaitQueueLength throws NPE if null |
534 |
*/ |
535 |
public void testGetWaitQueueLengthNPE() { |
536 |
final Mutex sync = new Mutex(); |
537 |
try { |
538 |
sync.getWaitQueueLength(null); |
539 |
shouldThrow(); |
540 |
} catch (NullPointerException success) {} |
541 |
} |
542 |
|
543 |
|
544 |
/** |
545 |
* getWaitingThreads throws NPE if null |
546 |
*/ |
547 |
public void testGetWaitingThreadsNPE() { |
548 |
final Mutex sync = new Mutex(); |
549 |
try { |
550 |
sync.getWaitingThreads(null); |
551 |
shouldThrow(); |
552 |
} catch (NullPointerException success) {} |
553 |
} |
554 |
|
555 |
|
556 |
/** |
557 |
* hasWaiters throws IAE if not owned |
558 |
*/ |
559 |
public void testHasWaitersIAE() { |
560 |
final Mutex sync = new Mutex(); |
561 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
562 |
final Mutex sync2 = new Mutex(); |
563 |
try { |
564 |
sync2.hasWaiters(c); |
565 |
shouldThrow(); |
566 |
} catch (IllegalArgumentException success) {} |
567 |
} |
568 |
|
569 |
/** |
570 |
* hasWaiters throws IMSE if not synced |
571 |
*/ |
572 |
public void testHasWaitersIMSE() { |
573 |
final Mutex sync = new Mutex(); |
574 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
575 |
try { |
576 |
sync.hasWaiters(c); |
577 |
shouldThrow(); |
578 |
} catch (IllegalMonitorStateException success) {} |
579 |
} |
580 |
|
581 |
|
582 |
/** |
583 |
* getWaitQueueLength throws IAE if not owned |
584 |
*/ |
585 |
public void testGetWaitQueueLengthIAE() { |
586 |
final Mutex sync = new Mutex(); |
587 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
588 |
final Mutex sync2 = new Mutex(); |
589 |
try { |
590 |
sync2.getWaitQueueLength(c); |
591 |
shouldThrow(); |
592 |
} catch (IllegalArgumentException success) {} |
593 |
} |
594 |
|
595 |
/** |
596 |
* getWaitQueueLength throws IMSE if not synced |
597 |
*/ |
598 |
public void testGetWaitQueueLengthIMSE() { |
599 |
final Mutex sync = new Mutex(); |
600 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
601 |
try { |
602 |
sync.getWaitQueueLength(c); |
603 |
shouldThrow(); |
604 |
} catch (IllegalMonitorStateException success) {} |
605 |
} |
606 |
|
607 |
|
608 |
/** |
609 |
* getWaitingThreads throws IAE if not owned |
610 |
*/ |
611 |
public void testGetWaitingThreadsIAE() { |
612 |
final Mutex sync = new Mutex(); |
613 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
614 |
final Mutex sync2 = new Mutex(); |
615 |
try { |
616 |
sync2.getWaitingThreads(c); |
617 |
shouldThrow(); |
618 |
} catch (IllegalArgumentException success) {} |
619 |
} |
620 |
|
621 |
/** |
622 |
* getWaitingThreads throws IMSE if not synced |
623 |
*/ |
624 |
public void testGetWaitingThreadsIMSE() { |
625 |
final Mutex sync = new Mutex(); |
626 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
627 |
try { |
628 |
sync.getWaitingThreads(c); |
629 |
shouldThrow(); |
630 |
} catch (IllegalMonitorStateException success) {} |
631 |
} |
632 |
|
633 |
|
634 |
|
635 |
/** |
636 |
* hasWaiters returns true when a thread is waiting, else false |
637 |
*/ |
638 |
public void testHasWaiters() throws InterruptedException { |
639 |
final Mutex sync = new Mutex(); |
640 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
641 |
Thread t = new Thread(new CheckedRunnable() { |
642 |
public void realRun() throws InterruptedException { |
643 |
sync.acquire(1); |
644 |
threadAssertFalse(sync.hasWaiters(c)); |
645 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
646 |
c.await(); |
647 |
sync.release(1); |
648 |
}}); |
649 |
|
650 |
t.start(); |
651 |
Thread.sleep(SHORT_DELAY_MS); |
652 |
sync.acquire(1); |
653 |
assertTrue(sync.hasWaiters(c)); |
654 |
assertEquals(1, sync.getWaitQueueLength(c)); |
655 |
c.signal(); |
656 |
sync.release(1); |
657 |
Thread.sleep(SHORT_DELAY_MS); |
658 |
sync.acquire(1); |
659 |
assertFalse(sync.hasWaiters(c)); |
660 |
assertEquals(0, sync.getWaitQueueLength(c)); |
661 |
sync.release(1); |
662 |
t.join(SHORT_DELAY_MS); |
663 |
assertFalse(t.isAlive()); |
664 |
} |
665 |
|
666 |
/** |
667 |
* getWaitQueueLength returns number of waiting threads |
668 |
*/ |
669 |
public void testGetWaitQueueLength() throws InterruptedException { |
670 |
final Mutex sync = new Mutex(); |
671 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
672 |
Thread t1 = new Thread(new CheckedRunnable() { |
673 |
public void realRun() throws InterruptedException { |
674 |
sync.acquire(1); |
675 |
threadAssertFalse(sync.hasWaiters(c)); |
676 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
677 |
c.await(); |
678 |
sync.release(1); |
679 |
}}); |
680 |
|
681 |
Thread t2 = new Thread(new CheckedRunnable() { |
682 |
public void realRun() throws InterruptedException { |
683 |
sync.acquire(1); |
684 |
threadAssertTrue(sync.hasWaiters(c)); |
685 |
threadAssertEquals(1, sync.getWaitQueueLength(c)); |
686 |
c.await(); |
687 |
sync.release(1); |
688 |
}}); |
689 |
|
690 |
t1.start(); |
691 |
Thread.sleep(SHORT_DELAY_MS); |
692 |
t2.start(); |
693 |
Thread.sleep(SHORT_DELAY_MS); |
694 |
sync.acquire(1); |
695 |
assertTrue(sync.hasWaiters(c)); |
696 |
assertEquals(2, sync.getWaitQueueLength(c)); |
697 |
c.signalAll(); |
698 |
sync.release(1); |
699 |
Thread.sleep(SHORT_DELAY_MS); |
700 |
sync.acquire(1); |
701 |
assertFalse(sync.hasWaiters(c)); |
702 |
assertEquals(0, sync.getWaitQueueLength(c)); |
703 |
sync.release(1); |
704 |
t1.join(SHORT_DELAY_MS); |
705 |
t2.join(SHORT_DELAY_MS); |
706 |
assertFalse(t1.isAlive()); |
707 |
assertFalse(t2.isAlive()); |
708 |
} |
709 |
|
710 |
/** |
711 |
* getWaitingThreads returns only and all waiting threads |
712 |
*/ |
713 |
public void testGetWaitingThreads() throws InterruptedException { |
714 |
final Mutex sync = new Mutex(); |
715 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
716 |
Thread t1 = new Thread(new CheckedRunnable() { |
717 |
public void realRun() throws InterruptedException { |
718 |
sync.acquire(1); |
719 |
threadAssertTrue(sync.getWaitingThreads(c).isEmpty()); |
720 |
c.await(); |
721 |
sync.release(1); |
722 |
}}); |
723 |
|
724 |
Thread t2 = new Thread(new CheckedRunnable() { |
725 |
public void realRun() throws InterruptedException { |
726 |
sync.acquire(1); |
727 |
threadAssertFalse(sync.getWaitingThreads(c).isEmpty()); |
728 |
c.await(); |
729 |
sync.release(1); |
730 |
}}); |
731 |
|
732 |
sync.acquire(1); |
733 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
734 |
sync.release(1); |
735 |
t1.start(); |
736 |
Thread.sleep(SHORT_DELAY_MS); |
737 |
t2.start(); |
738 |
Thread.sleep(SHORT_DELAY_MS); |
739 |
sync.acquire(1); |
740 |
assertTrue(sync.hasWaiters(c)); |
741 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
742 |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
743 |
c.signalAll(); |
744 |
sync.release(1); |
745 |
Thread.sleep(SHORT_DELAY_MS); |
746 |
sync.acquire(1); |
747 |
assertFalse(sync.hasWaiters(c)); |
748 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
749 |
sync.release(1); |
750 |
t1.join(SHORT_DELAY_MS); |
751 |
t2.join(SHORT_DELAY_MS); |
752 |
assertFalse(t1.isAlive()); |
753 |
assertFalse(t2.isAlive()); |
754 |
} |
755 |
|
756 |
|
757 |
|
758 |
/** |
759 |
* awaitUninterruptibly doesn't abort on interrupt |
760 |
*/ |
761 |
public void testAwaitUninterruptibly() throws InterruptedException { |
762 |
final Mutex sync = new Mutex(); |
763 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
764 |
Thread t = new Thread(new CheckedRunnable() { |
765 |
public void realRun() { |
766 |
sync.acquire(1); |
767 |
c.awaitUninterruptibly(); |
768 |
sync.release(1); |
769 |
}}); |
770 |
|
771 |
t.start(); |
772 |
Thread.sleep(SHORT_DELAY_MS); |
773 |
t.interrupt(); |
774 |
sync.acquire(1); |
775 |
c.signal(); |
776 |
sync.release(1); |
777 |
t.join(SHORT_DELAY_MS); |
778 |
assertFalse(t.isAlive()); |
779 |
} |
780 |
|
781 |
/** |
782 |
* await is interruptible |
783 |
*/ |
784 |
public void testAwait_Interrupt() throws InterruptedException { |
785 |
final Mutex sync = new Mutex(); |
786 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
787 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
788 |
public void realRun() throws InterruptedException { |
789 |
sync.acquire(1); |
790 |
c.await(); |
791 |
}}); |
792 |
|
793 |
t.start(); |
794 |
Thread.sleep(SHORT_DELAY_MS); |
795 |
t.interrupt(); |
796 |
t.join(SHORT_DELAY_MS); |
797 |
assertFalse(t.isAlive()); |
798 |
} |
799 |
|
800 |
/** |
801 |
* awaitNanos is interruptible |
802 |
*/ |
803 |
public void testAwaitNanos_Interrupt() throws InterruptedException { |
804 |
final Mutex sync = new Mutex(); |
805 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
806 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
807 |
public void realRun() throws InterruptedException { |
808 |
sync.acquire(1); |
809 |
c.awaitNanos(LONG_DELAY_MS * 1000L * 1000L); |
810 |
}}); |
811 |
|
812 |
t.start(); |
813 |
Thread.sleep(SHORT_DELAY_MS); |
814 |
t.interrupt(); |
815 |
t.join(SHORT_DELAY_MS); |
816 |
assertFalse(t.isAlive()); |
817 |
} |
818 |
|
819 |
/** |
820 |
* awaitUntil is interruptible |
821 |
*/ |
822 |
public void testAwaitUntil_Interrupt() throws InterruptedException { |
823 |
final Mutex sync = new Mutex(); |
824 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
825 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
826 |
public void realRun() throws InterruptedException { |
827 |
sync.acquire(1); |
828 |
java.util.Date d = new java.util.Date(); |
829 |
c.awaitUntil(new java.util.Date(d.getTime() + 10000)); |
830 |
}}); |
831 |
|
832 |
t.start(); |
833 |
Thread.sleep(SHORT_DELAY_MS); |
834 |
t.interrupt(); |
835 |
t.join(SHORT_DELAY_MS); |
836 |
assertFalse(t.isAlive()); |
837 |
} |
838 |
|
839 |
/** |
840 |
* signalAll wakes up all threads |
841 |
*/ |
842 |
public void testSignalAll() throws InterruptedException { |
843 |
final Mutex sync = new Mutex(); |
844 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
845 |
Thread t1 = new Thread(new CheckedRunnable() { |
846 |
public void realRun() throws InterruptedException { |
847 |
sync.acquire(1); |
848 |
c.await(); |
849 |
sync.release(1); |
850 |
}}); |
851 |
|
852 |
Thread t2 = new Thread(new CheckedRunnable() { |
853 |
public void realRun() throws InterruptedException { |
854 |
sync.acquire(1); |
855 |
c.await(); |
856 |
sync.release(1); |
857 |
}}); |
858 |
|
859 |
t1.start(); |
860 |
t2.start(); |
861 |
Thread.sleep(SHORT_DELAY_MS); |
862 |
sync.acquire(1); |
863 |
c.signalAll(); |
864 |
sync.release(1); |
865 |
t1.join(SHORT_DELAY_MS); |
866 |
t2.join(SHORT_DELAY_MS); |
867 |
assertFalse(t1.isAlive()); |
868 |
assertFalse(t2.isAlive()); |
869 |
} |
870 |
|
871 |
|
872 |
/** |
873 |
* toString indicates current state |
874 |
*/ |
875 |
public void testToString() { |
876 |
Mutex sync = new Mutex(); |
877 |
String us = sync.toString(); |
878 |
assertTrue(us.indexOf("State = 0") >= 0); |
879 |
sync.acquire(1); |
880 |
String ls = sync.toString(); |
881 |
assertTrue(ls.indexOf("State = 1") >= 0); |
882 |
} |
883 |
|
884 |
/** |
885 |
* A serialized AQS deserializes with current state |
886 |
*/ |
887 |
public void testSerialization() throws Exception { |
888 |
Mutex l = new Mutex(); |
889 |
l.acquire(1); |
890 |
assertTrue(l.isHeldExclusively()); |
891 |
|
892 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
893 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
894 |
out.writeObject(l); |
895 |
out.close(); |
896 |
|
897 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
898 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
899 |
Mutex r = (Mutex) in.readObject(); |
900 |
assertTrue(r.isHeldExclusively()); |
901 |
} |
902 |
|
903 |
|
904 |
/** |
905 |
* tryReleaseShared setting state changes getState |
906 |
*/ |
907 |
public void testGetStateWithReleaseShared() { |
908 |
final BooleanLatch l = new BooleanLatch(); |
909 |
assertFalse(l.isSignalled()); |
910 |
l.releaseShared(0); |
911 |
assertTrue(l.isSignalled()); |
912 |
} |
913 |
|
914 |
/** |
915 |
* releaseShared has no effect when already signalled |
916 |
*/ |
917 |
public void testReleaseShared() { |
918 |
final BooleanLatch l = new BooleanLatch(); |
919 |
assertFalse(l.isSignalled()); |
920 |
l.releaseShared(0); |
921 |
assertTrue(l.isSignalled()); |
922 |
l.releaseShared(0); |
923 |
assertTrue(l.isSignalled()); |
924 |
} |
925 |
|
926 |
/** |
927 |
* acquireSharedInterruptibly returns after release, but not before |
928 |
*/ |
929 |
public void testAcquireSharedInterruptibly() throws InterruptedException { |
930 |
final BooleanLatch l = new BooleanLatch(); |
931 |
|
932 |
Thread t = new Thread(new CheckedRunnable() { |
933 |
public void realRun() throws InterruptedException { |
934 |
threadAssertFalse(l.isSignalled()); |
935 |
l.acquireSharedInterruptibly(0); |
936 |
threadAssertTrue(l.isSignalled()); |
937 |
}}); |
938 |
|
939 |
t.start(); |
940 |
assertFalse(l.isSignalled()); |
941 |
Thread.sleep(SHORT_DELAY_MS); |
942 |
l.releaseShared(0); |
943 |
assertTrue(l.isSignalled()); |
944 |
t.join(); |
945 |
} |
946 |
|
947 |
|
948 |
/** |
949 |
* acquireSharedTimed returns after release |
950 |
*/ |
951 |
public void testAsquireSharedTimed() throws InterruptedException { |
952 |
final BooleanLatch l = new BooleanLatch(); |
953 |
|
954 |
Thread t = new Thread(new CheckedRunnable() { |
955 |
public void realRun() throws InterruptedException { |
956 |
threadAssertFalse(l.isSignalled()); |
957 |
threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS * 1000L * 1000L)); |
958 |
threadAssertTrue(l.isSignalled()); |
959 |
}}); |
960 |
|
961 |
t.start(); |
962 |
assertFalse(l.isSignalled()); |
963 |
Thread.sleep(SHORT_DELAY_MS); |
964 |
l.releaseShared(0); |
965 |
assertTrue(l.isSignalled()); |
966 |
t.join(); |
967 |
} |
968 |
|
969 |
/** |
970 |
* acquireSharedInterruptibly throws IE if interrupted before released |
971 |
*/ |
972 |
public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException { |
973 |
final BooleanLatch l = new BooleanLatch(); |
974 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
975 |
public void realRun() throws InterruptedException { |
976 |
threadAssertFalse(l.isSignalled()); |
977 |
l.acquireSharedInterruptibly(0); |
978 |
}}); |
979 |
|
980 |
t.start(); |
981 |
assertFalse(l.isSignalled()); |
982 |
t.interrupt(); |
983 |
t.join(); |
984 |
} |
985 |
|
986 |
/** |
987 |
* acquireSharedTimed throws IE if interrupted before released |
988 |
*/ |
989 |
public void testAcquireSharedNanos_InterruptedException() throws InterruptedException { |
990 |
final BooleanLatch l = new BooleanLatch(); |
991 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
992 |
public void realRun() throws InterruptedException { |
993 |
threadAssertFalse(l.isSignalled()); |
994 |
l.tryAcquireSharedNanos(0, SMALL_DELAY_MS * 1000L * 1000L); |
995 |
}}); |
996 |
|
997 |
t.start(); |
998 |
Thread.sleep(SHORT_DELAY_MS); |
999 |
assertFalse(l.isSignalled()); |
1000 |
t.interrupt(); |
1001 |
t.join(); |
1002 |
} |
1003 |
|
1004 |
/** |
1005 |
* acquireSharedTimed times out if not released before timeout |
1006 |
*/ |
1007 |
public void testAcquireSharedNanos_Timeout() throws InterruptedException { |
1008 |
final BooleanLatch l = new BooleanLatch(); |
1009 |
Thread t = new Thread(new CheckedRunnable() { |
1010 |
public void realRun() throws InterruptedException { |
1011 |
threadAssertFalse(l.isSignalled()); |
1012 |
threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS * 1000L * 1000L)); |
1013 |
}}); |
1014 |
|
1015 |
t.start(); |
1016 |
Thread.sleep(SHORT_DELAY_MS); |
1017 |
assertFalse(l.isSignalled()); |
1018 |
t.join(); |
1019 |
} |
1020 |
|
1021 |
} |