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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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*/ |
271 |
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)); |
285 |
t1.interrupt(); |
286 |
Thread.sleep(SHORT_DELAY_MS); |
287 |
assertFalse(sync.getExclusiveQueuedThreads().contains(t1)); |
288 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
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sync.release(1); |
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Thread.sleep(SHORT_DELAY_MS); |
291 |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
292 |
t1.join(); |
293 |
t2.join(); |
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} |
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|
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/** |
297 |
* getSharedQueuedThreads does not include exclusively waiting threads |
298 |
*/ |
299 |
public void testGetSharedQueuedThreads() throws InterruptedException { |
300 |
final Mutex sync = new Mutex(); |
301 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
302 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
303 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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sync.acquire(1); |
305 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
306 |
t1.start(); |
307 |
Thread.sleep(SHORT_DELAY_MS); |
308 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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t2.start(); |
310 |
Thread.sleep(SHORT_DELAY_MS); |
311 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
312 |
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(); |
319 |
t2.join(); |
320 |
} |
321 |
|
322 |
/** |
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 * 1000 * 1000); |
331 |
}}); |
332 |
|
333 |
t.start(); |
334 |
t.interrupt(); |
335 |
t.join(); |
336 |
} |
337 |
|
338 |
|
339 |
/** |
340 |
* TryAcquire on exclusively held sync fails |
341 |
*/ |
342 |
public void testTryAcquireWhenSynced() throws InterruptedException { |
343 |
final Mutex sync = new Mutex(); |
344 |
sync.acquire(1); |
345 |
Thread t = new Thread(new CheckedRunnable() { |
346 |
public void realRun() { |
347 |
threadAssertFalse(sync.tryAcquire(1)); |
348 |
}}); |
349 |
|
350 |
t.start(); |
351 |
t.join(); |
352 |
sync.release(1); |
353 |
} |
354 |
|
355 |
/** |
356 |
* tryAcquireNanos on an exclusively held sync times out |
357 |
*/ |
358 |
public void testAcquireNanos_Timeout() throws InterruptedException { |
359 |
final Mutex sync = new Mutex(); |
360 |
sync.acquire(1); |
361 |
Thread t = new Thread(new CheckedRunnable() { |
362 |
public void realRun() throws InterruptedException { |
363 |
threadAssertFalse(sync.tryAcquireNanos(1, 1000 * 1000)); |
364 |
}}); |
365 |
|
366 |
t.start(); |
367 |
t.join(); |
368 |
sync.release(1); |
369 |
} |
370 |
|
371 |
|
372 |
/** |
373 |
* getState is true when acquired and false when not |
374 |
*/ |
375 |
public void testGetState() throws InterruptedException { |
376 |
final Mutex sync = new Mutex(); |
377 |
sync.acquire(1); |
378 |
assertTrue(sync.isHeldExclusively()); |
379 |
sync.release(1); |
380 |
assertFalse(sync.isHeldExclusively()); |
381 |
Thread t = new Thread(new CheckedRunnable() { |
382 |
public void realRun() throws InterruptedException { |
383 |
sync.acquire(1); |
384 |
Thread.sleep(SMALL_DELAY_MS); |
385 |
sync.release(1); |
386 |
}}); |
387 |
|
388 |
t.start(); |
389 |
Thread.sleep(SHORT_DELAY_MS); |
390 |
assertTrue(sync.isHeldExclusively()); |
391 |
t.join(); |
392 |
assertFalse(sync.isHeldExclusively()); |
393 |
} |
394 |
|
395 |
|
396 |
/** |
397 |
* acquireInterruptibly is interruptible. |
398 |
*/ |
399 |
public void testAcquireInterruptibly1() throws InterruptedException { |
400 |
final Mutex sync = new Mutex(); |
401 |
sync.acquire(1); |
402 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
403 |
|
404 |
t.start(); |
405 |
Thread.sleep(SHORT_DELAY_MS); |
406 |
t.interrupt(); |
407 |
Thread.sleep(SHORT_DELAY_MS); |
408 |
sync.release(1); |
409 |
t.join(); |
410 |
} |
411 |
|
412 |
/** |
413 |
* acquireInterruptibly succeeds when released, else is interruptible |
414 |
*/ |
415 |
public void testAcquireInterruptibly2() throws InterruptedException { |
416 |
final Mutex sync = new Mutex(); |
417 |
sync.acquireInterruptibly(1); |
418 |
Thread t = new Thread(new InterruptedSyncRunnable(sync)); |
419 |
t.start(); |
420 |
t.interrupt(); |
421 |
assertTrue(sync.isHeldExclusively()); |
422 |
t.join(); |
423 |
} |
424 |
|
425 |
/** |
426 |
* owns is true for a condition created by sync else false |
427 |
*/ |
428 |
public void testOwns() { |
429 |
final Mutex sync = new Mutex(); |
430 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
431 |
final Mutex sync2 = new Mutex(); |
432 |
assertTrue(sync.owns(c)); |
433 |
assertFalse(sync2.owns(c)); |
434 |
} |
435 |
|
436 |
/** |
437 |
* Calling await without holding sync throws IllegalMonitorStateException |
438 |
*/ |
439 |
public void testAwait_IllegalMonitor() throws InterruptedException { |
440 |
final Mutex sync = new Mutex(); |
441 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
442 |
try { |
443 |
c.await(); |
444 |
shouldThrow(); |
445 |
} catch (IllegalMonitorStateException success) {} |
446 |
} |
447 |
|
448 |
/** |
449 |
* Calling signal without holding sync throws IllegalMonitorStateException |
450 |
*/ |
451 |
public void testSignal_IllegalMonitor() { |
452 |
final Mutex sync = new Mutex(); |
453 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
454 |
try { |
455 |
c.signal(); |
456 |
shouldThrow(); |
457 |
} catch (IllegalMonitorStateException success) {} |
458 |
} |
459 |
|
460 |
/** |
461 |
* awaitNanos without a signal times out |
462 |
*/ |
463 |
public void testAwaitNanos_Timeout() throws InterruptedException { |
464 |
final Mutex sync = new Mutex(); |
465 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
466 |
sync.acquire(1); |
467 |
long t = c.awaitNanos(100); |
468 |
assertTrue(t <= 0); |
469 |
sync.release(1); |
470 |
} |
471 |
|
472 |
/** |
473 |
* Timed await without a signal times out |
474 |
*/ |
475 |
public void testAwait_Timeout() throws InterruptedException { |
476 |
final Mutex sync = new Mutex(); |
477 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
478 |
sync.acquire(1); |
479 |
assertFalse(c.await(SHORT_DELAY_MS, MILLISECONDS)); |
480 |
sync.release(1); |
481 |
} |
482 |
|
483 |
/** |
484 |
* awaitUntil without a signal times out |
485 |
*/ |
486 |
public void testAwaitUntil_Timeout() throws InterruptedException { |
487 |
final Mutex sync = new Mutex(); |
488 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
489 |
sync.acquire(1); |
490 |
java.util.Date d = new java.util.Date(); |
491 |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
492 |
sync.release(1); |
493 |
} |
494 |
|
495 |
/** |
496 |
* await returns when signalled |
497 |
*/ |
498 |
public void testAwait() throws InterruptedException { |
499 |
final Mutex sync = new Mutex(); |
500 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
501 |
Thread t = new Thread(new CheckedRunnable() { |
502 |
public void realRun() throws InterruptedException { |
503 |
sync.acquire(1); |
504 |
c.await(); |
505 |
sync.release(1); |
506 |
}}); |
507 |
|
508 |
t.start(); |
509 |
Thread.sleep(SHORT_DELAY_MS); |
510 |
sync.acquire(1); |
511 |
c.signal(); |
512 |
sync.release(1); |
513 |
t.join(SHORT_DELAY_MS); |
514 |
assertFalse(t.isAlive()); |
515 |
} |
516 |
|
517 |
|
518 |
|
519 |
/** |
520 |
* hasWaiters throws NPE if null |
521 |
*/ |
522 |
public void testHasWaitersNPE() { |
523 |
final Mutex sync = new Mutex(); |
524 |
try { |
525 |
sync.hasWaiters(null); |
526 |
shouldThrow(); |
527 |
} catch (NullPointerException success) {} |
528 |
} |
529 |
|
530 |
/** |
531 |
* getWaitQueueLength throws NPE if null |
532 |
*/ |
533 |
public void testGetWaitQueueLengthNPE() { |
534 |
final Mutex sync = new Mutex(); |
535 |
try { |
536 |
sync.getWaitQueueLength(null); |
537 |
shouldThrow(); |
538 |
} catch (NullPointerException success) {} |
539 |
} |
540 |
|
541 |
|
542 |
/** |
543 |
* getWaitingThreads throws NPE if null |
544 |
*/ |
545 |
public void testGetWaitingThreadsNPE() { |
546 |
final Mutex sync = new Mutex(); |
547 |
try { |
548 |
sync.getWaitingThreads(null); |
549 |
shouldThrow(); |
550 |
} catch (NullPointerException success) {} |
551 |
} |
552 |
|
553 |
|
554 |
/** |
555 |
* hasWaiters throws IAE if not owned |
556 |
*/ |
557 |
public void testHasWaitersIAE() { |
558 |
final Mutex sync = new Mutex(); |
559 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
560 |
final Mutex sync2 = new Mutex(); |
561 |
try { |
562 |
sync2.hasWaiters(c); |
563 |
shouldThrow(); |
564 |
} catch (IllegalArgumentException success) {} |
565 |
} |
566 |
|
567 |
/** |
568 |
* hasWaiters throws IMSE if not synced |
569 |
*/ |
570 |
public void testHasWaitersIMSE() { |
571 |
final Mutex sync = new Mutex(); |
572 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
573 |
try { |
574 |
sync.hasWaiters(c); |
575 |
shouldThrow(); |
576 |
} catch (IllegalMonitorStateException success) {} |
577 |
} |
578 |
|
579 |
|
580 |
/** |
581 |
* getWaitQueueLength throws IAE if not owned |
582 |
*/ |
583 |
public void testGetWaitQueueLengthIAE() { |
584 |
final Mutex sync = new Mutex(); |
585 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
586 |
final Mutex sync2 = new Mutex(); |
587 |
try { |
588 |
sync2.getWaitQueueLength(c); |
589 |
shouldThrow(); |
590 |
} catch (IllegalArgumentException success) {} |
591 |
} |
592 |
|
593 |
/** |
594 |
* getWaitQueueLength throws IMSE if not synced |
595 |
*/ |
596 |
public void testGetWaitQueueLengthIMSE() { |
597 |
final Mutex sync = new Mutex(); |
598 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
599 |
try { |
600 |
sync.getWaitQueueLength(c); |
601 |
shouldThrow(); |
602 |
} catch (IllegalMonitorStateException success) {} |
603 |
} |
604 |
|
605 |
|
606 |
/** |
607 |
* getWaitingThreads throws IAE if not owned |
608 |
*/ |
609 |
public void testGetWaitingThreadsIAE() { |
610 |
final Mutex sync = new Mutex(); |
611 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
612 |
final Mutex sync2 = new Mutex(); |
613 |
try { |
614 |
sync2.getWaitingThreads(c); |
615 |
shouldThrow(); |
616 |
} catch (IllegalArgumentException success) {} |
617 |
} |
618 |
|
619 |
/** |
620 |
* getWaitingThreads throws IMSE if not synced |
621 |
*/ |
622 |
public void testGetWaitingThreadsIMSE() { |
623 |
final Mutex sync = new Mutex(); |
624 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
625 |
try { |
626 |
sync.getWaitingThreads(c); |
627 |
shouldThrow(); |
628 |
} catch (IllegalMonitorStateException success) {} |
629 |
} |
630 |
|
631 |
|
632 |
|
633 |
/** |
634 |
* hasWaiters returns true when a thread is waiting, else false |
635 |
*/ |
636 |
public void testHasWaiters() throws InterruptedException { |
637 |
final Mutex sync = new Mutex(); |
638 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
639 |
Thread t = new Thread(new CheckedRunnable() { |
640 |
public void realRun() throws InterruptedException { |
641 |
sync.acquire(1); |
642 |
threadAssertFalse(sync.hasWaiters(c)); |
643 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
644 |
c.await(); |
645 |
sync.release(1); |
646 |
}}); |
647 |
|
648 |
t.start(); |
649 |
Thread.sleep(SHORT_DELAY_MS); |
650 |
sync.acquire(1); |
651 |
assertTrue(sync.hasWaiters(c)); |
652 |
assertEquals(1, sync.getWaitQueueLength(c)); |
653 |
c.signal(); |
654 |
sync.release(1); |
655 |
Thread.sleep(SHORT_DELAY_MS); |
656 |
sync.acquire(1); |
657 |
assertFalse(sync.hasWaiters(c)); |
658 |
assertEquals(0, sync.getWaitQueueLength(c)); |
659 |
sync.release(1); |
660 |
t.join(SHORT_DELAY_MS); |
661 |
assertFalse(t.isAlive()); |
662 |
} |
663 |
|
664 |
/** |
665 |
* getWaitQueueLength returns number of waiting threads |
666 |
*/ |
667 |
public void testGetWaitQueueLength() throws InterruptedException { |
668 |
final Mutex sync = new Mutex(); |
669 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
670 |
Thread t1 = new Thread(new CheckedRunnable() { |
671 |
public void realRun() throws InterruptedException { |
672 |
sync.acquire(1); |
673 |
threadAssertFalse(sync.hasWaiters(c)); |
674 |
threadAssertEquals(0, sync.getWaitQueueLength(c)); |
675 |
c.await(); |
676 |
sync.release(1); |
677 |
}}); |
678 |
|
679 |
Thread t2 = new Thread(new CheckedRunnable() { |
680 |
public void realRun() throws InterruptedException { |
681 |
sync.acquire(1); |
682 |
threadAssertTrue(sync.hasWaiters(c)); |
683 |
threadAssertEquals(1, sync.getWaitQueueLength(c)); |
684 |
c.await(); |
685 |
sync.release(1); |
686 |
}}); |
687 |
|
688 |
t1.start(); |
689 |
Thread.sleep(SHORT_DELAY_MS); |
690 |
t2.start(); |
691 |
Thread.sleep(SHORT_DELAY_MS); |
692 |
sync.acquire(1); |
693 |
assertTrue(sync.hasWaiters(c)); |
694 |
assertEquals(2, sync.getWaitQueueLength(c)); |
695 |
c.signalAll(); |
696 |
sync.release(1); |
697 |
Thread.sleep(SHORT_DELAY_MS); |
698 |
sync.acquire(1); |
699 |
assertFalse(sync.hasWaiters(c)); |
700 |
assertEquals(0, sync.getWaitQueueLength(c)); |
701 |
sync.release(1); |
702 |
t1.join(SHORT_DELAY_MS); |
703 |
t2.join(SHORT_DELAY_MS); |
704 |
assertFalse(t1.isAlive()); |
705 |
assertFalse(t2.isAlive()); |
706 |
} |
707 |
|
708 |
/** |
709 |
* getWaitingThreads returns only and all waiting threads |
710 |
*/ |
711 |
public void testGetWaitingThreads() throws InterruptedException { |
712 |
final Mutex sync = new Mutex(); |
713 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
714 |
Thread t1 = new Thread(new CheckedRunnable() { |
715 |
public void realRun() throws InterruptedException { |
716 |
sync.acquire(1); |
717 |
threadAssertTrue(sync.getWaitingThreads(c).isEmpty()); |
718 |
c.await(); |
719 |
sync.release(1); |
720 |
}}); |
721 |
|
722 |
Thread t2 = new Thread(new CheckedRunnable() { |
723 |
public void realRun() throws InterruptedException { |
724 |
sync.acquire(1); |
725 |
threadAssertFalse(sync.getWaitingThreads(c).isEmpty()); |
726 |
c.await(); |
727 |
sync.release(1); |
728 |
}}); |
729 |
|
730 |
sync.acquire(1); |
731 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
732 |
sync.release(1); |
733 |
t1.start(); |
734 |
Thread.sleep(SHORT_DELAY_MS); |
735 |
t2.start(); |
736 |
Thread.sleep(SHORT_DELAY_MS); |
737 |
sync.acquire(1); |
738 |
assertTrue(sync.hasWaiters(c)); |
739 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
740 |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
741 |
c.signalAll(); |
742 |
sync.release(1); |
743 |
Thread.sleep(SHORT_DELAY_MS); |
744 |
sync.acquire(1); |
745 |
assertFalse(sync.hasWaiters(c)); |
746 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
747 |
sync.release(1); |
748 |
t1.join(SHORT_DELAY_MS); |
749 |
t2.join(SHORT_DELAY_MS); |
750 |
assertFalse(t1.isAlive()); |
751 |
assertFalse(t2.isAlive()); |
752 |
} |
753 |
|
754 |
|
755 |
|
756 |
/** |
757 |
* awaitUninterruptibly doesn't abort on interrupt |
758 |
*/ |
759 |
public void testAwaitUninterruptibly() throws InterruptedException { |
760 |
final Mutex sync = new Mutex(); |
761 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
762 |
Thread t = new Thread(new CheckedRunnable() { |
763 |
public void realRun() { |
764 |
sync.acquire(1); |
765 |
c.awaitUninterruptibly(); |
766 |
sync.release(1); |
767 |
}}); |
768 |
|
769 |
t.start(); |
770 |
Thread.sleep(SHORT_DELAY_MS); |
771 |
t.interrupt(); |
772 |
sync.acquire(1); |
773 |
c.signal(); |
774 |
sync.release(1); |
775 |
t.join(SHORT_DELAY_MS); |
776 |
assertFalse(t.isAlive()); |
777 |
} |
778 |
|
779 |
/** |
780 |
* await is interruptible |
781 |
*/ |
782 |
public void testAwait_Interrupt() throws InterruptedException { |
783 |
final Mutex sync = new Mutex(); |
784 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
785 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
786 |
public void realRun() throws InterruptedException { |
787 |
sync.acquire(1); |
788 |
c.await(); |
789 |
sync.release(1); |
790 |
}}); |
791 |
|
792 |
t.start(); |
793 |
Thread.sleep(SHORT_DELAY_MS); |
794 |
t.interrupt(); |
795 |
t.join(SHORT_DELAY_MS); |
796 |
assertFalse(t.isAlive()); |
797 |
} |
798 |
|
799 |
/** |
800 |
* awaitNanos is interruptible |
801 |
*/ |
802 |
public void testAwaitNanos_Interrupt() throws InterruptedException { |
803 |
final Mutex sync = new Mutex(); |
804 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
805 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
806 |
public void realRun() throws InterruptedException { |
807 |
sync.acquire(1); |
808 |
c.awaitNanos(1000 * 1000 * 1000); // 1 sec |
809 |
sync.release(1); |
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 |
sync.release(1); |
831 |
}}); |
832 |
|
833 |
t.start(); |
834 |
Thread.sleep(SHORT_DELAY_MS); |
835 |
t.interrupt(); |
836 |
t.join(SHORT_DELAY_MS); |
837 |
assertFalse(t.isAlive()); |
838 |
} |
839 |
|
840 |
/** |
841 |
* signalAll wakes up all threads |
842 |
*/ |
843 |
public void testSignalAll() throws InterruptedException { |
844 |
final Mutex sync = new Mutex(); |
845 |
final AbstractQueuedSynchronizer.ConditionObject c = sync.newCondition(); |
846 |
Thread t1 = new Thread(new CheckedRunnable() { |
847 |
public void realRun() throws InterruptedException { |
848 |
sync.acquire(1); |
849 |
c.await(); |
850 |
sync.release(1); |
851 |
}}); |
852 |
|
853 |
Thread t2 = new Thread(new CheckedRunnable() { |
854 |
public void realRun() throws InterruptedException { |
855 |
sync.acquire(1); |
856 |
c.await(); |
857 |
sync.release(1); |
858 |
}}); |
859 |
|
860 |
t1.start(); |
861 |
t2.start(); |
862 |
Thread.sleep(SHORT_DELAY_MS); |
863 |
sync.acquire(1); |
864 |
c.signalAll(); |
865 |
sync.release(1); |
866 |
t1.join(SHORT_DELAY_MS); |
867 |
t2.join(SHORT_DELAY_MS); |
868 |
assertFalse(t1.isAlive()); |
869 |
assertFalse(t2.isAlive()); |
870 |
} |
871 |
|
872 |
|
873 |
/** |
874 |
* toString indicates current state |
875 |
*/ |
876 |
public void testToString() { |
877 |
Mutex sync = new Mutex(); |
878 |
String us = sync.toString(); |
879 |
assertTrue(us.indexOf("State = 0") >= 0); |
880 |
sync.acquire(1); |
881 |
String ls = sync.toString(); |
882 |
assertTrue(ls.indexOf("State = 1") >= 0); |
883 |
} |
884 |
|
885 |
/** |
886 |
* A serialized AQS deserializes with current state |
887 |
*/ |
888 |
public void testSerialization() throws Exception { |
889 |
Mutex l = new Mutex(); |
890 |
l.acquire(1); |
891 |
assertTrue(l.isHeldExclusively()); |
892 |
|
893 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
894 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
895 |
out.writeObject(l); |
896 |
out.close(); |
897 |
|
898 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
899 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
900 |
Mutex r = (Mutex) in.readObject(); |
901 |
assertTrue(r.isHeldExclusively()); |
902 |
} |
903 |
|
904 |
|
905 |
/** |
906 |
* tryReleaseShared setting state changes getState |
907 |
*/ |
908 |
public void testGetStateWithReleaseShared() { |
909 |
final BooleanLatch l = new BooleanLatch(); |
910 |
assertFalse(l.isSignalled()); |
911 |
l.releaseShared(0); |
912 |
assertTrue(l.isSignalled()); |
913 |
} |
914 |
|
915 |
/** |
916 |
* releaseShared has no effect when already signalled |
917 |
*/ |
918 |
public void testReleaseShared() { |
919 |
final BooleanLatch l = new BooleanLatch(); |
920 |
assertFalse(l.isSignalled()); |
921 |
l.releaseShared(0); |
922 |
assertTrue(l.isSignalled()); |
923 |
l.releaseShared(0); |
924 |
assertTrue(l.isSignalled()); |
925 |
} |
926 |
|
927 |
/** |
928 |
* acquireSharedInterruptibly returns after release, but not before |
929 |
*/ |
930 |
public void testAcquireSharedInterruptibly() throws InterruptedException { |
931 |
final BooleanLatch l = new BooleanLatch(); |
932 |
|
933 |
Thread t = new Thread(new CheckedRunnable() { |
934 |
public void realRun() throws InterruptedException { |
935 |
threadAssertFalse(l.isSignalled()); |
936 |
l.acquireSharedInterruptibly(0); |
937 |
threadAssertTrue(l.isSignalled()); |
938 |
}}); |
939 |
|
940 |
t.start(); |
941 |
assertFalse(l.isSignalled()); |
942 |
Thread.sleep(SHORT_DELAY_MS); |
943 |
l.releaseShared(0); |
944 |
assertTrue(l.isSignalled()); |
945 |
t.join(); |
946 |
} |
947 |
|
948 |
|
949 |
/** |
950 |
* acquireSharedTimed returns after release |
951 |
*/ |
952 |
public void testAsquireSharedTimed() throws InterruptedException { |
953 |
final BooleanLatch l = new BooleanLatch(); |
954 |
|
955 |
Thread t = new Thread(new CheckedRunnable() { |
956 |
public void realRun() throws InterruptedException { |
957 |
threadAssertFalse(l.isSignalled()); |
958 |
threadAssertTrue(l.tryAcquireSharedNanos(0, MEDIUM_DELAY_MS* 1000 * 1000)); |
959 |
threadAssertTrue(l.isSignalled()); |
960 |
}}); |
961 |
|
962 |
t.start(); |
963 |
assertFalse(l.isSignalled()); |
964 |
Thread.sleep(SHORT_DELAY_MS); |
965 |
l.releaseShared(0); |
966 |
assertTrue(l.isSignalled()); |
967 |
t.join(); |
968 |
} |
969 |
|
970 |
/** |
971 |
* acquireSharedInterruptibly throws IE if interrupted before released |
972 |
*/ |
973 |
public void testAcquireSharedInterruptibly_InterruptedException() throws InterruptedException { |
974 |
final BooleanLatch l = new BooleanLatch(); |
975 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
976 |
public void realRun() throws InterruptedException { |
977 |
threadAssertFalse(l.isSignalled()); |
978 |
l.acquireSharedInterruptibly(0); |
979 |
}}); |
980 |
|
981 |
t.start(); |
982 |
assertFalse(l.isSignalled()); |
983 |
t.interrupt(); |
984 |
t.join(); |
985 |
} |
986 |
|
987 |
/** |
988 |
* acquireSharedTimed throws IE if interrupted before released |
989 |
*/ |
990 |
public void testAcquireSharedNanos_InterruptedException() throws InterruptedException { |
991 |
final BooleanLatch l = new BooleanLatch(); |
992 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
993 |
public void realRun() throws InterruptedException { |
994 |
threadAssertFalse(l.isSignalled()); |
995 |
l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000); |
996 |
}}); |
997 |
|
998 |
t.start(); |
999 |
Thread.sleep(SHORT_DELAY_MS); |
1000 |
assertFalse(l.isSignalled()); |
1001 |
t.interrupt(); |
1002 |
t.join(); |
1003 |
} |
1004 |
|
1005 |
/** |
1006 |
* acquireSharedTimed times out if not released before timeout |
1007 |
*/ |
1008 |
public void testAcquireSharedNanos_Timeout() throws InterruptedException { |
1009 |
final BooleanLatch l = new BooleanLatch(); |
1010 |
Thread t = new Thread(new CheckedRunnable() { |
1011 |
public void realRun() throws InterruptedException { |
1012 |
threadAssertFalse(l.isSignalled()); |
1013 |
threadAssertFalse(l.tryAcquireSharedNanos(0, SMALL_DELAY_MS* 1000 * 1000)); |
1014 |
}}); |
1015 |
|
1016 |
t.start(); |
1017 |
Thread.sleep(SHORT_DELAY_MS); |
1018 |
assertFalse(l.isSignalled()); |
1019 |
t.join(); |
1020 |
} |
1021 |
|
1022 |
} |