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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/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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|
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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|
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.HashSet; |
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import java.util.concurrent.locks.AbstractQueuedSynchronizer; |
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import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject; |
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|
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import junit.framework.AssertionFailedError; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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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 class javadoc. Exclusive |
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* acquire tests exercise this as a sample user extension. Other |
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* methods/features of AbstractQueuedSynchronizer are tested via |
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* 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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/** An eccentric value for locked synchronizer state. */ |
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static final int LOCKED = (1 << 31) | (1 << 15); |
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|
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static final int UNLOCKED = 0; |
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|
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@Override public boolean isHeldExclusively() { |
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int state = getState(); |
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assertTrue(state == UNLOCKED || state == LOCKED); |
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return state == LOCKED; |
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} |
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|
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@Override public boolean tryAcquire(int acquires) { |
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assertEquals(LOCKED, acquires); |
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return compareAndSetState(UNLOCKED, LOCKED); |
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} |
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|
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@Override public boolean tryRelease(int releases) { |
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if (getState() != LOCKED) throw new IllegalMonitorStateException(); |
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assertEquals(LOCKED, releases); |
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setState(UNLOCKED); |
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return true; |
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} |
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|
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public boolean tryAcquireNanos(long nanos) throws InterruptedException { |
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return tryAcquireNanos(LOCKED, nanos); |
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} |
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|
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public boolean tryAcquire() { |
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return tryAcquire(LOCKED); |
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} |
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|
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public boolean tryRelease() { |
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return tryRelease(LOCKED); |
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} |
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|
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public void acquire() { |
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acquire(LOCKED); |
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} |
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|
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public void acquireInterruptibly() throws InterruptedException { |
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acquireInterruptibly(LOCKED); |
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} |
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|
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public void release() { |
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release(LOCKED); |
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} |
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|
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public ConditionObject newCondition() { |
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return new ConditionObject(); |
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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. |
109 |
*/ |
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class InterruptibleSyncRunnable extends CheckedRunnable { |
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final Mutex sync; |
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InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; } |
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public void realRun() throws InterruptedException { |
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sync.acquireInterruptibly(); |
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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 sync) { this.sync = sync; } |
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public void realRun() throws InterruptedException { |
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sync.acquireInterruptibly(); |
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} |
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} |
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|
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/** A constant to clarify calls to checking methods below. */ |
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static final Thread[] NO_THREADS = new Thread[0]; |
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|
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/** |
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* Spin-waits until sync.isQueued(t) becomes true. |
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*/ |
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void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) { |
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long startTime = System.nanoTime(); |
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while (!sync.isQueued(t)) { |
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if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
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throw new AssertionFailedError("timed out"); |
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Thread.yield(); |
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} |
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assertTrue(t.isAlive()); |
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} |
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|
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/** |
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* Checks that sync has exactly the given queued threads. |
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*/ |
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void assertHasQueuedThreads(AbstractQueuedSynchronizer sync, |
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Thread... expected) { |
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Collection<Thread> actual = sync.getQueuedThreads(); |
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assertEquals(expected.length > 0, sync.hasQueuedThreads()); |
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assertEquals(expected.length, sync.getQueueLength()); |
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assertEquals(expected.length, actual.size()); |
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assertEquals(expected.length == 0, actual.isEmpty()); |
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assertEquals(new HashSet<Thread>(actual), |
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new HashSet<Thread>(Arrays.asList(expected))); |
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} |
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|
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/** |
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* Checks that sync has exactly the given (exclusive) queued threads. |
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*/ |
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void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync, |
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Thread... expected) { |
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assertHasQueuedThreads(sync, expected); |
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assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()), |
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new HashSet<Thread>(sync.getQueuedThreads())); |
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assertEquals(0, sync.getSharedQueuedThreads().size()); |
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assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
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} |
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|
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/** |
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* Checks that sync has exactly the given (shared) queued threads. |
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*/ |
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void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync, |
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Thread... expected) { |
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assertHasQueuedThreads(sync, expected); |
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assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()), |
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new HashSet<Thread>(sync.getQueuedThreads())); |
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assertEquals(0, sync.getExclusiveQueuedThreads().size()); |
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assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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} |
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|
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/** |
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* Checks that condition c has exactly the given waiter threads, |
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* after acquiring mutex. |
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*/ |
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void assertHasWaitersUnlocked(Mutex sync, ConditionObject c, |
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Thread... threads) { |
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sync.acquire(); |
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assertHasWaitersLocked(sync, c, threads); |
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sync.release(); |
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} |
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|
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/** |
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* Checks that condition c has exactly the given waiter threads. |
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*/ |
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void assertHasWaitersLocked(Mutex sync, ConditionObject c, |
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Thread... threads) { |
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assertEquals(threads.length > 0, sync.hasWaiters(c)); |
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assertEquals(threads.length, sync.getWaitQueueLength(c)); |
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assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty()); |
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assertEquals(threads.length, sync.getWaitingThreads(c).size()); |
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assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)), |
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new HashSet<Thread>(Arrays.asList(threads))); |
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} |
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|
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enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil } |
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|
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/** |
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* Awaits condition using the specified AwaitMethod. |
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*/ |
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void await(ConditionObject c, AwaitMethod awaitMethod) |
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throws InterruptedException { |
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long timeoutMillis = 2 * LONG_DELAY_MS; |
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switch (awaitMethod) { |
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case await: |
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c.await(); |
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break; |
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case awaitTimed: |
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assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
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break; |
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case awaitNanos: |
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long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
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long nanosRemaining = c.awaitNanos(nanosTimeout); |
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assertTrue(nanosRemaining > 0); |
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break; |
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case awaitUntil: |
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assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
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break; |
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} |
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} |
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|
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/** |
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* Checks that awaiting the given condition times out (using the |
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* default timeout duration). |
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*/ |
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void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) { |
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long timeoutMillis = timeoutMillis(); |
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long startTime = System.nanoTime(); |
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try { |
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switch (awaitMethod) { |
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case awaitTimed: |
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assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
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break; |
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case awaitNanos: |
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long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
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long nanosRemaining = c.awaitNanos(nanosTimeout); |
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assertTrue(nanosRemaining <= 0); |
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break; |
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case awaitUntil: |
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assertFalse(c.awaitUntil(delayedDate(timeoutMillis))); |
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break; |
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default: |
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throw new UnsupportedOperationException(); |
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} |
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} catch (InterruptedException ie) { threadUnexpectedException(ie); } |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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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 sync = new Mutex(); |
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assertFalse(sync.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 sync = new Mutex(); |
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sync.acquire(); |
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assertTrue(sync.isHeldExclusively()); |
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sync.release(); |
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assertFalse(sync.isHeldExclusively()); |
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} |
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|
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/** |
281 |
* tryAcquire on a released sync succeeds |
282 |
*/ |
283 |
public void testTryAcquire() { |
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Mutex sync = new Mutex(); |
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assertTrue(sync.tryAcquire()); |
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assertTrue(sync.isHeldExclusively()); |
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sync.release(); |
288 |
assertFalse(sync.isHeldExclusively()); |
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} |
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|
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/** |
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* hasQueuedThreads reports whether there are waiting threads |
293 |
*/ |
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public void testHasQueuedThreads() { |
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final Mutex sync = new Mutex(); |
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assertFalse(sync.hasQueuedThreads()); |
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sync.acquire(); |
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Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
299 |
waitForQueuedThread(sync, t1); |
300 |
assertTrue(sync.hasQueuedThreads()); |
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Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
302 |
waitForQueuedThread(sync, t2); |
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assertTrue(sync.hasQueuedThreads()); |
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t1.interrupt(); |
305 |
awaitTermination(t1); |
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assertTrue(sync.hasQueuedThreads()); |
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sync.release(); |
308 |
awaitTermination(t2); |
309 |
assertFalse(sync.hasQueuedThreads()); |
310 |
} |
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|
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/** |
313 |
* isQueued(null) throws NullPointerException |
314 |
*/ |
315 |
public void testIsQueuedNPE() { |
316 |
final Mutex sync = new Mutex(); |
317 |
try { |
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sync.isQueued(null); |
319 |
shouldThrow(); |
320 |
} catch (NullPointerException success) {} |
321 |
} |
322 |
|
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/** |
324 |
* isQueued reports whether a thread is queued |
325 |
*/ |
326 |
public void testIsQueued() { |
327 |
final Mutex sync = new Mutex(); |
328 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
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Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
330 |
assertFalse(sync.isQueued(t1)); |
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assertFalse(sync.isQueued(t2)); |
332 |
sync.acquire(); |
333 |
t1.start(); |
334 |
waitForQueuedThread(sync, t1); |
335 |
assertTrue(sync.isQueued(t1)); |
336 |
assertFalse(sync.isQueued(t2)); |
337 |
t2.start(); |
338 |
waitForQueuedThread(sync, t2); |
339 |
assertTrue(sync.isQueued(t1)); |
340 |
assertTrue(sync.isQueued(t2)); |
341 |
t1.interrupt(); |
342 |
awaitTermination(t1); |
343 |
assertFalse(sync.isQueued(t1)); |
344 |
assertTrue(sync.isQueued(t2)); |
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sync.release(); |
346 |
awaitTermination(t2); |
347 |
assertFalse(sync.isQueued(t1)); |
348 |
assertFalse(sync.isQueued(t2)); |
349 |
} |
350 |
|
351 |
/** |
352 |
* getFirstQueuedThread returns first waiting thread or null if none |
353 |
*/ |
354 |
public void testGetFirstQueuedThread() { |
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final Mutex sync = new Mutex(); |
356 |
assertNull(sync.getFirstQueuedThread()); |
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sync.acquire(); |
358 |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
359 |
waitForQueuedThread(sync, t1); |
360 |
assertEquals(t1, sync.getFirstQueuedThread()); |
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Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
362 |
waitForQueuedThread(sync, t2); |
363 |
assertEquals(t1, sync.getFirstQueuedThread()); |
364 |
t1.interrupt(); |
365 |
awaitTermination(t1); |
366 |
assertEquals(t2, sync.getFirstQueuedThread()); |
367 |
sync.release(); |
368 |
awaitTermination(t2); |
369 |
assertNull(sync.getFirstQueuedThread()); |
370 |
} |
371 |
|
372 |
/** |
373 |
* hasContended reports false if no thread has ever blocked, else true |
374 |
*/ |
375 |
public void testHasContended() { |
376 |
final Mutex sync = new Mutex(); |
377 |
assertFalse(sync.hasContended()); |
378 |
sync.acquire(); |
379 |
assertFalse(sync.hasContended()); |
380 |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
381 |
waitForQueuedThread(sync, t1); |
382 |
assertTrue(sync.hasContended()); |
383 |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
384 |
waitForQueuedThread(sync, t2); |
385 |
assertTrue(sync.hasContended()); |
386 |
t1.interrupt(); |
387 |
awaitTermination(t1); |
388 |
assertTrue(sync.hasContended()); |
389 |
sync.release(); |
390 |
awaitTermination(t2); |
391 |
assertTrue(sync.hasContended()); |
392 |
} |
393 |
|
394 |
/** |
395 |
* getQueuedThreads returns all waiting threads |
396 |
*/ |
397 |
public void testGetQueuedThreads() { |
398 |
final Mutex sync = new Mutex(); |
399 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
400 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
401 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
402 |
sync.acquire(); |
403 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
404 |
t1.start(); |
405 |
waitForQueuedThread(sync, t1); |
406 |
assertHasExclusiveQueuedThreads(sync, t1); |
407 |
assertTrue(sync.getQueuedThreads().contains(t1)); |
408 |
assertFalse(sync.getQueuedThreads().contains(t2)); |
409 |
t2.start(); |
410 |
waitForQueuedThread(sync, t2); |
411 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
412 |
assertTrue(sync.getQueuedThreads().contains(t1)); |
413 |
assertTrue(sync.getQueuedThreads().contains(t2)); |
414 |
t1.interrupt(); |
415 |
awaitTermination(t1); |
416 |
assertHasExclusiveQueuedThreads(sync, t2); |
417 |
sync.release(); |
418 |
awaitTermination(t2); |
419 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
420 |
} |
421 |
|
422 |
/** |
423 |
* getExclusiveQueuedThreads returns all exclusive waiting threads |
424 |
*/ |
425 |
public void testGetExclusiveQueuedThreads() { |
426 |
final Mutex sync = new Mutex(); |
427 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
428 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
429 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
430 |
sync.acquire(); |
431 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
432 |
t1.start(); |
433 |
waitForQueuedThread(sync, t1); |
434 |
assertHasExclusiveQueuedThreads(sync, t1); |
435 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
436 |
assertFalse(sync.getExclusiveQueuedThreads().contains(t2)); |
437 |
t2.start(); |
438 |
waitForQueuedThread(sync, t2); |
439 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
440 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
441 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
442 |
t1.interrupt(); |
443 |
awaitTermination(t1); |
444 |
assertHasExclusiveQueuedThreads(sync, t2); |
445 |
sync.release(); |
446 |
awaitTermination(t2); |
447 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
448 |
} |
449 |
|
450 |
/** |
451 |
* getSharedQueuedThreads does not include exclusively waiting threads |
452 |
*/ |
453 |
public void testGetSharedQueuedThreads_Exclusive() { |
454 |
final Mutex sync = new Mutex(); |
455 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
456 |
sync.acquire(); |
457 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
458 |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
459 |
waitForQueuedThread(sync, t1); |
460 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
461 |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
462 |
waitForQueuedThread(sync, t2); |
463 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
464 |
t1.interrupt(); |
465 |
awaitTermination(t1); |
466 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
467 |
sync.release(); |
468 |
awaitTermination(t2); |
469 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
470 |
} |
471 |
|
472 |
/** |
473 |
* getSharedQueuedThreads returns all shared waiting threads |
474 |
*/ |
475 |
public void testGetSharedQueuedThreads_Shared() { |
476 |
final BooleanLatch l = new BooleanLatch(); |
477 |
assertHasSharedQueuedThreads(l, NO_THREADS); |
478 |
Thread t1 = newStartedThread(new CheckedInterruptedRunnable() { |
479 |
public void realRun() throws InterruptedException { |
480 |
l.acquireSharedInterruptibly(0); |
481 |
}}); |
482 |
waitForQueuedThread(l, t1); |
483 |
assertHasSharedQueuedThreads(l, t1); |
484 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
485 |
public void realRun() throws InterruptedException { |
486 |
l.acquireSharedInterruptibly(0); |
487 |
}}); |
488 |
waitForQueuedThread(l, t2); |
489 |
assertHasSharedQueuedThreads(l, t1, t2); |
490 |
t1.interrupt(); |
491 |
awaitTermination(t1); |
492 |
assertHasSharedQueuedThreads(l, t2); |
493 |
assertTrue(l.releaseShared(0)); |
494 |
awaitTermination(t2); |
495 |
assertHasSharedQueuedThreads(l, NO_THREADS); |
496 |
} |
497 |
|
498 |
/** |
499 |
* tryAcquireNanos is interruptible |
500 |
*/ |
501 |
public void testTryAcquireNanos_Interruptible() { |
502 |
final Mutex sync = new Mutex(); |
503 |
sync.acquire(); |
504 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
505 |
public void realRun() throws InterruptedException { |
506 |
sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); |
507 |
}}); |
508 |
|
509 |
waitForQueuedThread(sync, t); |
510 |
t.interrupt(); |
511 |
awaitTermination(t); |
512 |
} |
513 |
|
514 |
/** |
515 |
* tryAcquire on exclusively held sync fails |
516 |
*/ |
517 |
public void testTryAcquireWhenSynced() { |
518 |
final Mutex sync = new Mutex(); |
519 |
sync.acquire(); |
520 |
Thread t = newStartedThread(new CheckedRunnable() { |
521 |
public void realRun() { |
522 |
assertFalse(sync.tryAcquire()); |
523 |
}}); |
524 |
|
525 |
awaitTermination(t); |
526 |
sync.release(); |
527 |
} |
528 |
|
529 |
/** |
530 |
* tryAcquireNanos on an exclusively held sync times out |
531 |
*/ |
532 |
public void testAcquireNanos_Timeout() { |
533 |
final Mutex sync = new Mutex(); |
534 |
sync.acquire(); |
535 |
Thread t = newStartedThread(new CheckedRunnable() { |
536 |
public void realRun() throws InterruptedException { |
537 |
long startTime = System.nanoTime(); |
538 |
long nanos = MILLISECONDS.toNanos(timeoutMillis()); |
539 |
assertFalse(sync.tryAcquireNanos(nanos)); |
540 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
541 |
}}); |
542 |
|
543 |
awaitTermination(t); |
544 |
sync.release(); |
545 |
} |
546 |
|
547 |
/** |
548 |
* getState is true when acquired and false when not |
549 |
*/ |
550 |
public void testGetState() { |
551 |
final Mutex sync = new Mutex(); |
552 |
sync.acquire(); |
553 |
assertTrue(sync.isHeldExclusively()); |
554 |
sync.release(); |
555 |
assertFalse(sync.isHeldExclusively()); |
556 |
|
557 |
final BooleanLatch acquired = new BooleanLatch(); |
558 |
final BooleanLatch done = new BooleanLatch(); |
559 |
Thread t = newStartedThread(new CheckedRunnable() { |
560 |
public void realRun() throws InterruptedException { |
561 |
sync.acquire(); |
562 |
assertTrue(acquired.releaseShared(0)); |
563 |
done.acquireShared(0); |
564 |
sync.release(); |
565 |
}}); |
566 |
|
567 |
acquired.acquireShared(0); |
568 |
assertTrue(sync.isHeldExclusively()); |
569 |
assertTrue(done.releaseShared(0)); |
570 |
awaitTermination(t); |
571 |
assertFalse(sync.isHeldExclusively()); |
572 |
} |
573 |
|
574 |
/** |
575 |
* acquireInterruptibly succeeds when released, else is interruptible |
576 |
*/ |
577 |
public void testAcquireInterruptibly() throws InterruptedException { |
578 |
final Mutex sync = new Mutex(); |
579 |
final BooleanLatch threadStarted = new BooleanLatch(); |
580 |
sync.acquireInterruptibly(); |
581 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
582 |
public void realRun() throws InterruptedException { |
583 |
assertTrue(threadStarted.releaseShared(0)); |
584 |
sync.acquireInterruptibly(); |
585 |
}}); |
586 |
|
587 |
threadStarted.acquireShared(0); |
588 |
waitForQueuedThread(sync, t); |
589 |
t.interrupt(); |
590 |
awaitTermination(t); |
591 |
assertTrue(sync.isHeldExclusively()); |
592 |
} |
593 |
|
594 |
/** |
595 |
* owns is true for a condition created by sync else false |
596 |
*/ |
597 |
public void testOwns() { |
598 |
final Mutex sync = new Mutex(); |
599 |
final ConditionObject c = sync.newCondition(); |
600 |
final Mutex sync2 = new Mutex(); |
601 |
assertTrue(sync.owns(c)); |
602 |
assertFalse(sync2.owns(c)); |
603 |
} |
604 |
|
605 |
/** |
606 |
* Calling await without holding sync throws IllegalMonitorStateException |
607 |
*/ |
608 |
public void testAwait_IMSE() { |
609 |
final Mutex sync = new Mutex(); |
610 |
final ConditionObject c = sync.newCondition(); |
611 |
for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
612 |
long startTime = System.nanoTime(); |
613 |
try { |
614 |
await(c, awaitMethod); |
615 |
shouldThrow(); |
616 |
} catch (IllegalMonitorStateException success) { |
617 |
} catch (InterruptedException e) { threadUnexpectedException(e); } |
618 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
619 |
} |
620 |
} |
621 |
|
622 |
/** |
623 |
* Calling signal without holding sync throws IllegalMonitorStateException |
624 |
*/ |
625 |
public void testSignal_IMSE() { |
626 |
final Mutex sync = new Mutex(); |
627 |
final ConditionObject c = sync.newCondition(); |
628 |
try { |
629 |
c.signal(); |
630 |
shouldThrow(); |
631 |
} catch (IllegalMonitorStateException success) {} |
632 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
633 |
} |
634 |
|
635 |
/** |
636 |
* Calling signalAll without holding sync throws IllegalMonitorStateException |
637 |
*/ |
638 |
public void testSignalAll_IMSE() { |
639 |
final Mutex sync = new Mutex(); |
640 |
final ConditionObject c = sync.newCondition(); |
641 |
try { |
642 |
c.signalAll(); |
643 |
shouldThrow(); |
644 |
} catch (IllegalMonitorStateException success) {} |
645 |
} |
646 |
|
647 |
/** |
648 |
* await/awaitNanos/awaitUntil without a signal times out |
649 |
*/ |
650 |
public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); } |
651 |
public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); } |
652 |
public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); } |
653 |
public void testAwait_Timeout(AwaitMethod awaitMethod) { |
654 |
final Mutex sync = new Mutex(); |
655 |
final ConditionObject c = sync.newCondition(); |
656 |
sync.acquire(); |
657 |
assertAwaitTimesOut(c, awaitMethod); |
658 |
sync.release(); |
659 |
} |
660 |
|
661 |
/** |
662 |
* await/awaitNanos/awaitUntil returns when signalled |
663 |
*/ |
664 |
public void testSignal_await() { testSignal(AwaitMethod.await); } |
665 |
public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); } |
666 |
public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); } |
667 |
public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); } |
668 |
public void testSignal(final AwaitMethod awaitMethod) { |
669 |
final Mutex sync = new Mutex(); |
670 |
final ConditionObject c = sync.newCondition(); |
671 |
final BooleanLatch acquired = new BooleanLatch(); |
672 |
Thread t = newStartedThread(new CheckedRunnable() { |
673 |
public void realRun() throws InterruptedException { |
674 |
sync.acquire(); |
675 |
assertTrue(acquired.releaseShared(0)); |
676 |
await(c, awaitMethod); |
677 |
sync.release(); |
678 |
}}); |
679 |
|
680 |
acquired.acquireShared(0); |
681 |
sync.acquire(); |
682 |
assertHasWaitersLocked(sync, c, t); |
683 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
684 |
c.signal(); |
685 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
686 |
assertHasExclusiveQueuedThreads(sync, t); |
687 |
sync.release(); |
688 |
awaitTermination(t); |
689 |
} |
690 |
|
691 |
/** |
692 |
* hasWaiters(null) throws NullPointerException |
693 |
*/ |
694 |
public void testHasWaitersNPE() { |
695 |
final Mutex sync = new Mutex(); |
696 |
try { |
697 |
sync.hasWaiters(null); |
698 |
shouldThrow(); |
699 |
} catch (NullPointerException success) {} |
700 |
} |
701 |
|
702 |
/** |
703 |
* getWaitQueueLength(null) throws NullPointerException |
704 |
*/ |
705 |
public void testGetWaitQueueLengthNPE() { |
706 |
final Mutex sync = new Mutex(); |
707 |
try { |
708 |
sync.getWaitQueueLength(null); |
709 |
shouldThrow(); |
710 |
} catch (NullPointerException success) {} |
711 |
} |
712 |
|
713 |
/** |
714 |
* getWaitingThreads(null) throws NullPointerException |
715 |
*/ |
716 |
public void testGetWaitingThreadsNPE() { |
717 |
final Mutex sync = new Mutex(); |
718 |
try { |
719 |
sync.getWaitingThreads(null); |
720 |
shouldThrow(); |
721 |
} catch (NullPointerException success) {} |
722 |
} |
723 |
|
724 |
/** |
725 |
* hasWaiters throws IllegalArgumentException if not owned |
726 |
*/ |
727 |
public void testHasWaitersIAE() { |
728 |
final Mutex sync = new Mutex(); |
729 |
final ConditionObject c = sync.newCondition(); |
730 |
final Mutex sync2 = new Mutex(); |
731 |
try { |
732 |
sync2.hasWaiters(c); |
733 |
shouldThrow(); |
734 |
} catch (IllegalArgumentException success) {} |
735 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
736 |
} |
737 |
|
738 |
/** |
739 |
* hasWaiters throws IllegalMonitorStateException if not synced |
740 |
*/ |
741 |
public void testHasWaitersIMSE() { |
742 |
final Mutex sync = new Mutex(); |
743 |
final ConditionObject c = sync.newCondition(); |
744 |
try { |
745 |
sync.hasWaiters(c); |
746 |
shouldThrow(); |
747 |
} catch (IllegalMonitorStateException success) {} |
748 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
749 |
} |
750 |
|
751 |
/** |
752 |
* getWaitQueueLength throws IllegalArgumentException if not owned |
753 |
*/ |
754 |
public void testGetWaitQueueLengthIAE() { |
755 |
final Mutex sync = new Mutex(); |
756 |
final ConditionObject c = sync.newCondition(); |
757 |
final Mutex sync2 = new Mutex(); |
758 |
try { |
759 |
sync2.getWaitQueueLength(c); |
760 |
shouldThrow(); |
761 |
} catch (IllegalArgumentException success) {} |
762 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
763 |
} |
764 |
|
765 |
/** |
766 |
* getWaitQueueLength throws IllegalMonitorStateException if not synced |
767 |
*/ |
768 |
public void testGetWaitQueueLengthIMSE() { |
769 |
final Mutex sync = new Mutex(); |
770 |
final ConditionObject c = sync.newCondition(); |
771 |
try { |
772 |
sync.getWaitQueueLength(c); |
773 |
shouldThrow(); |
774 |
} catch (IllegalMonitorStateException success) {} |
775 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
776 |
} |
777 |
|
778 |
/** |
779 |
* getWaitingThreads throws IllegalArgumentException if not owned |
780 |
*/ |
781 |
public void testGetWaitingThreadsIAE() { |
782 |
final Mutex sync = new Mutex(); |
783 |
final ConditionObject c = sync.newCondition(); |
784 |
final Mutex sync2 = new Mutex(); |
785 |
try { |
786 |
sync2.getWaitingThreads(c); |
787 |
shouldThrow(); |
788 |
} catch (IllegalArgumentException success) {} |
789 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
790 |
} |
791 |
|
792 |
/** |
793 |
* getWaitingThreads throws IllegalMonitorStateException if not synced |
794 |
*/ |
795 |
public void testGetWaitingThreadsIMSE() { |
796 |
final Mutex sync = new Mutex(); |
797 |
final ConditionObject c = sync.newCondition(); |
798 |
try { |
799 |
sync.getWaitingThreads(c); |
800 |
shouldThrow(); |
801 |
} catch (IllegalMonitorStateException success) {} |
802 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
803 |
} |
804 |
|
805 |
/** |
806 |
* hasWaiters returns true when a thread is waiting, else false |
807 |
*/ |
808 |
public void testHasWaiters() { |
809 |
final Mutex sync = new Mutex(); |
810 |
final ConditionObject c = sync.newCondition(); |
811 |
final BooleanLatch acquired = new BooleanLatch(); |
812 |
Thread t = newStartedThread(new CheckedRunnable() { |
813 |
public void realRun() throws InterruptedException { |
814 |
sync.acquire(); |
815 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
816 |
assertFalse(sync.hasWaiters(c)); |
817 |
assertTrue(acquired.releaseShared(0)); |
818 |
c.await(); |
819 |
sync.release(); |
820 |
}}); |
821 |
|
822 |
acquired.acquireShared(0); |
823 |
sync.acquire(); |
824 |
assertHasWaitersLocked(sync, c, t); |
825 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
826 |
assertTrue(sync.hasWaiters(c)); |
827 |
c.signal(); |
828 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
829 |
assertHasExclusiveQueuedThreads(sync, t); |
830 |
assertFalse(sync.hasWaiters(c)); |
831 |
sync.release(); |
832 |
|
833 |
awaitTermination(t); |
834 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
835 |
} |
836 |
|
837 |
/** |
838 |
* getWaitQueueLength returns number of waiting threads |
839 |
*/ |
840 |
public void testGetWaitQueueLength() { |
841 |
final Mutex sync = new Mutex(); |
842 |
final ConditionObject c = sync.newCondition(); |
843 |
final BooleanLatch acquired1 = new BooleanLatch(); |
844 |
final BooleanLatch acquired2 = new BooleanLatch(); |
845 |
final Thread t1 = newStartedThread(new CheckedRunnable() { |
846 |
public void realRun() throws InterruptedException { |
847 |
sync.acquire(); |
848 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
849 |
assertEquals(0, sync.getWaitQueueLength(c)); |
850 |
assertTrue(acquired1.releaseShared(0)); |
851 |
c.await(); |
852 |
sync.release(); |
853 |
}}); |
854 |
acquired1.acquireShared(0); |
855 |
sync.acquire(); |
856 |
assertHasWaitersLocked(sync, c, t1); |
857 |
assertEquals(1, sync.getWaitQueueLength(c)); |
858 |
sync.release(); |
859 |
|
860 |
final Thread t2 = newStartedThread(new CheckedRunnable() { |
861 |
public void realRun() throws InterruptedException { |
862 |
sync.acquire(); |
863 |
assertHasWaitersLocked(sync, c, t1); |
864 |
assertEquals(1, sync.getWaitQueueLength(c)); |
865 |
assertTrue(acquired2.releaseShared(0)); |
866 |
c.await(); |
867 |
sync.release(); |
868 |
}}); |
869 |
acquired2.acquireShared(0); |
870 |
sync.acquire(); |
871 |
assertHasWaitersLocked(sync, c, t1, t2); |
872 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
873 |
assertEquals(2, sync.getWaitQueueLength(c)); |
874 |
c.signalAll(); |
875 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
876 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
877 |
assertEquals(0, sync.getWaitQueueLength(c)); |
878 |
sync.release(); |
879 |
|
880 |
awaitTermination(t1); |
881 |
awaitTermination(t2); |
882 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
883 |
} |
884 |
|
885 |
/** |
886 |
* getWaitingThreads returns only and all waiting threads |
887 |
*/ |
888 |
public void testGetWaitingThreads() { |
889 |
final Mutex sync = new Mutex(); |
890 |
final ConditionObject c = sync.newCondition(); |
891 |
final BooleanLatch acquired1 = new BooleanLatch(); |
892 |
final BooleanLatch acquired2 = new BooleanLatch(); |
893 |
final Thread t1 = new Thread(new CheckedRunnable() { |
894 |
public void realRun() throws InterruptedException { |
895 |
sync.acquire(); |
896 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
897 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
898 |
assertTrue(acquired1.releaseShared(0)); |
899 |
c.await(); |
900 |
sync.release(); |
901 |
}}); |
902 |
|
903 |
final Thread t2 = new Thread(new CheckedRunnable() { |
904 |
public void realRun() throws InterruptedException { |
905 |
sync.acquire(); |
906 |
assertHasWaitersLocked(sync, c, t1); |
907 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
908 |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
909 |
assertEquals(1, sync.getWaitingThreads(c).size()); |
910 |
assertTrue(acquired2.releaseShared(0)); |
911 |
c.await(); |
912 |
sync.release(); |
913 |
}}); |
914 |
|
915 |
sync.acquire(); |
916 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
917 |
assertFalse(sync.getWaitingThreads(c).contains(t1)); |
918 |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
919 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
920 |
assertEquals(0, sync.getWaitingThreads(c).size()); |
921 |
sync.release(); |
922 |
|
923 |
t1.start(); |
924 |
acquired1.acquireShared(0); |
925 |
sync.acquire(); |
926 |
assertHasWaitersLocked(sync, c, t1); |
927 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
928 |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
929 |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
930 |
assertEquals(1, sync.getWaitingThreads(c).size()); |
931 |
sync.release(); |
932 |
|
933 |
t2.start(); |
934 |
acquired2.acquireShared(0); |
935 |
sync.acquire(); |
936 |
assertHasWaitersLocked(sync, c, t1, t2); |
937 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
938 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
939 |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
940 |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
941 |
assertEquals(2, sync.getWaitingThreads(c).size()); |
942 |
c.signalAll(); |
943 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
944 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
945 |
assertFalse(sync.getWaitingThreads(c).contains(t1)); |
946 |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
947 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
948 |
assertEquals(0, sync.getWaitingThreads(c).size()); |
949 |
sync.release(); |
950 |
|
951 |
awaitTermination(t1); |
952 |
awaitTermination(t2); |
953 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
954 |
} |
955 |
|
956 |
/** |
957 |
* awaitUninterruptibly is uninterruptible |
958 |
*/ |
959 |
public void testAwaitUninterruptibly() { |
960 |
final Mutex sync = new Mutex(); |
961 |
final ConditionObject c = sync.newCondition(); |
962 |
final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
963 |
Thread t = newStartedThread(new CheckedRunnable() { |
964 |
public void realRun() { |
965 |
sync.acquire(); |
966 |
assertTrue(pleaseInterrupt.releaseShared(0)); |
967 |
c.awaitUninterruptibly(); |
968 |
assertTrue(Thread.interrupted()); |
969 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
970 |
sync.release(); |
971 |
}}); |
972 |
|
973 |
pleaseInterrupt.acquireShared(0); |
974 |
sync.acquire(); |
975 |
assertHasWaitersLocked(sync, c, t); |
976 |
sync.release(); |
977 |
t.interrupt(); |
978 |
assertHasWaitersUnlocked(sync, c, t); |
979 |
assertThreadStaysAlive(t); |
980 |
sync.acquire(); |
981 |
assertHasWaitersLocked(sync, c, t); |
982 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
983 |
c.signal(); |
984 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
985 |
assertHasExclusiveQueuedThreads(sync, t); |
986 |
sync.release(); |
987 |
awaitTermination(t); |
988 |
} |
989 |
|
990 |
/** |
991 |
* await/awaitNanos/awaitUntil is interruptible |
992 |
*/ |
993 |
public void testInterruptible_await() { testInterruptible(AwaitMethod.await); } |
994 |
public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); } |
995 |
public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); } |
996 |
public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); } |
997 |
public void testInterruptible(final AwaitMethod awaitMethod) { |
998 |
final Mutex sync = new Mutex(); |
999 |
final ConditionObject c = sync.newCondition(); |
1000 |
final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
1001 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1002 |
public void realRun() throws InterruptedException { |
1003 |
sync.acquire(); |
1004 |
assertTrue(pleaseInterrupt.releaseShared(0)); |
1005 |
await(c, awaitMethod); |
1006 |
}}); |
1007 |
|
1008 |
pleaseInterrupt.acquireShared(0); |
1009 |
t.interrupt(); |
1010 |
awaitTermination(t); |
1011 |
} |
1012 |
|
1013 |
/** |
1014 |
* signalAll wakes up all threads |
1015 |
*/ |
1016 |
public void testSignalAll_await() { testSignalAll(AwaitMethod.await); } |
1017 |
public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); } |
1018 |
public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); } |
1019 |
public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); } |
1020 |
public void testSignalAll(final AwaitMethod awaitMethod) { |
1021 |
final Mutex sync = new Mutex(); |
1022 |
final ConditionObject c = sync.newCondition(); |
1023 |
final BooleanLatch acquired1 = new BooleanLatch(); |
1024 |
final BooleanLatch acquired2 = new BooleanLatch(); |
1025 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1026 |
public void realRun() throws InterruptedException { |
1027 |
sync.acquire(); |
1028 |
acquired1.releaseShared(0); |
1029 |
await(c, awaitMethod); |
1030 |
sync.release(); |
1031 |
}}); |
1032 |
|
1033 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1034 |
public void realRun() throws InterruptedException { |
1035 |
sync.acquire(); |
1036 |
acquired2.releaseShared(0); |
1037 |
await(c, awaitMethod); |
1038 |
sync.release(); |
1039 |
}}); |
1040 |
|
1041 |
acquired1.acquireShared(0); |
1042 |
acquired2.acquireShared(0); |
1043 |
sync.acquire(); |
1044 |
assertHasWaitersLocked(sync, c, t1, t2); |
1045 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1046 |
c.signalAll(); |
1047 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
1048 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
1049 |
sync.release(); |
1050 |
awaitTermination(t1); |
1051 |
awaitTermination(t2); |
1052 |
} |
1053 |
|
1054 |
/** |
1055 |
* toString indicates current state |
1056 |
*/ |
1057 |
public void testToString() { |
1058 |
Mutex sync = new Mutex(); |
1059 |
assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED)); |
1060 |
sync.acquire(); |
1061 |
assertTrue(sync.toString().contains("State = " + Mutex.LOCKED)); |
1062 |
} |
1063 |
|
1064 |
/** |
1065 |
* A serialized AQS deserializes with current state, but no queued threads |
1066 |
*/ |
1067 |
public void testSerialization() { |
1068 |
Mutex sync = new Mutex(); |
1069 |
assertFalse(serialClone(sync).isHeldExclusively()); |
1070 |
sync.acquire(); |
1071 |
Thread t = newStartedThread(new InterruptedSyncRunnable(sync)); |
1072 |
waitForQueuedThread(sync, t); |
1073 |
assertTrue(sync.isHeldExclusively()); |
1074 |
|
1075 |
Mutex clone = serialClone(sync); |
1076 |
assertTrue(clone.isHeldExclusively()); |
1077 |
assertHasExclusiveQueuedThreads(sync, t); |
1078 |
assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
1079 |
t.interrupt(); |
1080 |
awaitTermination(t); |
1081 |
sync.release(); |
1082 |
assertFalse(sync.isHeldExclusively()); |
1083 |
assertTrue(clone.isHeldExclusively()); |
1084 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1085 |
assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
1086 |
} |
1087 |
|
1088 |
/** |
1089 |
* tryReleaseShared setting state changes getState |
1090 |
*/ |
1091 |
public void testGetStateWithReleaseShared() { |
1092 |
final BooleanLatch l = new BooleanLatch(); |
1093 |
assertFalse(l.isSignalled()); |
1094 |
assertTrue(l.releaseShared(0)); |
1095 |
assertTrue(l.isSignalled()); |
1096 |
} |
1097 |
|
1098 |
/** |
1099 |
* releaseShared has no effect when already signalled |
1100 |
*/ |
1101 |
public void testReleaseShared() { |
1102 |
final BooleanLatch l = new BooleanLatch(); |
1103 |
assertFalse(l.isSignalled()); |
1104 |
assertTrue(l.releaseShared(0)); |
1105 |
assertTrue(l.isSignalled()); |
1106 |
assertTrue(l.releaseShared(0)); |
1107 |
assertTrue(l.isSignalled()); |
1108 |
} |
1109 |
|
1110 |
/** |
1111 |
* acquireSharedInterruptibly returns after release, but not before |
1112 |
*/ |
1113 |
public void testAcquireSharedInterruptibly() { |
1114 |
final BooleanLatch l = new BooleanLatch(); |
1115 |
|
1116 |
Thread t = newStartedThread(new CheckedRunnable() { |
1117 |
public void realRun() throws InterruptedException { |
1118 |
assertFalse(l.isSignalled()); |
1119 |
l.acquireSharedInterruptibly(0); |
1120 |
assertTrue(l.isSignalled()); |
1121 |
l.acquireSharedInterruptibly(0); |
1122 |
assertTrue(l.isSignalled()); |
1123 |
}}); |
1124 |
|
1125 |
waitForQueuedThread(l, t); |
1126 |
assertFalse(l.isSignalled()); |
1127 |
assertThreadStaysAlive(t); |
1128 |
assertHasSharedQueuedThreads(l, t); |
1129 |
assertTrue(l.releaseShared(0)); |
1130 |
assertTrue(l.isSignalled()); |
1131 |
awaitTermination(t); |
1132 |
} |
1133 |
|
1134 |
/** |
1135 |
* tryAcquireSharedNanos returns after release, but not before |
1136 |
*/ |
1137 |
public void testTryAcquireSharedNanos() { |
1138 |
final BooleanLatch l = new BooleanLatch(); |
1139 |
|
1140 |
Thread t = newStartedThread(new CheckedRunnable() { |
1141 |
public void realRun() throws InterruptedException { |
1142 |
assertFalse(l.isSignalled()); |
1143 |
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1144 |
assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
1145 |
assertTrue(l.isSignalled()); |
1146 |
assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
1147 |
assertTrue(l.isSignalled()); |
1148 |
}}); |
1149 |
|
1150 |
waitForQueuedThread(l, t); |
1151 |
assertFalse(l.isSignalled()); |
1152 |
assertThreadStaysAlive(t); |
1153 |
assertTrue(l.releaseShared(0)); |
1154 |
assertTrue(l.isSignalled()); |
1155 |
awaitTermination(t); |
1156 |
} |
1157 |
|
1158 |
/** |
1159 |
* acquireSharedInterruptibly is interruptible |
1160 |
*/ |
1161 |
public void testAcquireSharedInterruptibly_Interruptible() { |
1162 |
final BooleanLatch l = new BooleanLatch(); |
1163 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1164 |
public void realRun() throws InterruptedException { |
1165 |
assertFalse(l.isSignalled()); |
1166 |
l.acquireSharedInterruptibly(0); |
1167 |
}}); |
1168 |
|
1169 |
waitForQueuedThread(l, t); |
1170 |
assertFalse(l.isSignalled()); |
1171 |
t.interrupt(); |
1172 |
awaitTermination(t); |
1173 |
assertFalse(l.isSignalled()); |
1174 |
} |
1175 |
|
1176 |
/** |
1177 |
* tryAcquireSharedNanos is interruptible |
1178 |
*/ |
1179 |
public void testTryAcquireSharedNanos_Interruptible() { |
1180 |
final BooleanLatch l = new BooleanLatch(); |
1181 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1182 |
public void realRun() throws InterruptedException { |
1183 |
assertFalse(l.isSignalled()); |
1184 |
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1185 |
l.tryAcquireSharedNanos(0, nanos); |
1186 |
}}); |
1187 |
|
1188 |
waitForQueuedThread(l, t); |
1189 |
assertFalse(l.isSignalled()); |
1190 |
t.interrupt(); |
1191 |
awaitTermination(t); |
1192 |
assertFalse(l.isSignalled()); |
1193 |
} |
1194 |
|
1195 |
/** |
1196 |
* tryAcquireSharedNanos times out if not released before timeout |
1197 |
*/ |
1198 |
public void testTryAcquireSharedNanos_Timeout() { |
1199 |
final BooleanLatch l = new BooleanLatch(); |
1200 |
final BooleanLatch observedQueued = new BooleanLatch(); |
1201 |
final long timeoutMillis = timeoutMillis(); |
1202 |
Thread t = newStartedThread(new CheckedRunnable() { |
1203 |
public void realRun() throws InterruptedException { |
1204 |
assertFalse(l.isSignalled()); |
1205 |
for (long millis = timeoutMillis(); |
1206 |
!observedQueued.isSignalled(); |
1207 |
millis *= 2) { |
1208 |
long nanos = MILLISECONDS.toNanos(millis); |
1209 |
long startTime = System.nanoTime(); |
1210 |
assertFalse(l.tryAcquireSharedNanos(0, nanos)); |
1211 |
assertTrue(millisElapsedSince(startTime) >= millis); |
1212 |
} |
1213 |
assertFalse(l.isSignalled()); |
1214 |
}}); |
1215 |
|
1216 |
waitForQueuedThread(l, t); |
1217 |
observedQueued.releaseShared(0); |
1218 |
assertFalse(l.isSignalled()); |
1219 |
awaitTermination(t); |
1220 |
assertFalse(l.isSignalled()); |
1221 |
} |
1222 |
|
1223 |
/** |
1224 |
* awaitNanos/timed await with 0 wait times out immediately |
1225 |
*/ |
1226 |
public void testAwait_Zero() throws InterruptedException { |
1227 |
final Mutex sync = new Mutex(); |
1228 |
final ConditionObject c = sync.newCondition(); |
1229 |
sync.acquire(); |
1230 |
assertTrue(c.awaitNanos(0L) <= 0); |
1231 |
assertFalse(c.await(0L, NANOSECONDS)); |
1232 |
sync.release(); |
1233 |
} |
1234 |
|
1235 |
/** |
1236 |
* awaitNanos/timed await with maximum negative wait times does not underflow |
1237 |
*/ |
1238 |
public void testAwait_NegativeInfinity() throws InterruptedException { |
1239 |
final Mutex sync = new Mutex(); |
1240 |
final ConditionObject c = sync.newCondition(); |
1241 |
sync.acquire(); |
1242 |
assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0); |
1243 |
assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS)); |
1244 |
sync.release(); |
1245 |
} |
1246 |
|
1247 |
} |