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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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* 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 junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.util.concurrent.locks.*; |
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import java.io.*; |
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import java.util.ArrayList; |
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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.Test; |
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import junit.framework.TestSuite; |
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|
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@SuppressWarnings("WaitNotInLoop") // we implement spurious-wakeup freedom |
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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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main(suite(), args); |
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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, from the AbstractQueuedSynchronizer |
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* javadoc. All tests exercise this as a sample user extension. |
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* Other methods/features of AbstractQueuedSynchronizerTest are |
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* tested implicitly in ReentrantLock, ReentrantReadWriteLock, and |
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* Semaphore test classes |
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*/ |
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static class Mutex implements Lock, java.io.Serializable { |
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private static class Sync extends AbstractQueuedSynchronizer { |
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public int acquireExclusiveState(boolean isQueued, int acquires) { |
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assert acquires == 1; // Does not use multiple acquires |
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return compareAndSet(0, 1)? 0 : -1; |
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} |
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|
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public boolean releaseExclusiveState(int releases) { |
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set(0); |
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return true; |
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} |
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|
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public void checkConditionAccess(Thread thread, boolean waiting) { |
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if (get() == 0) throw new IllegalMonitorStateException(); |
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} |
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|
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Condition newCondition() { return new ConditionObject(); } |
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|
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private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException { |
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s.defaultReadObject(); |
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set(0); // reset to unlocked state |
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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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* Unlike the javadoc sample, we don't track owner thread via |
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* AbstractOwnableSynchronizer methods. |
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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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/** Owner thread is untracked, so this is really just isLocked(). */ |
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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 protected 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 protected 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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private final Sync sync = new Sync(); |
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public boolean tryLock() { |
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return sync.acquireExclusiveState(false, 1) >= 0; |
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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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public void lock() { |
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sync.acquireExclusiveUninterruptibly(1); |
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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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public void lockInterruptibly() throws InterruptedException { |
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sync.acquireExclusiveInterruptibly(1); |
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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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public boolean tryLock(long timeout, TimeUnit unit) throws InterruptedException { |
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return sync.acquireExclusiveTimed(1, unit.toNanos(timeout)); |
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|
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/** Faux-Implements Lock.newCondition(). */ |
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public ConditionObject newCondition() { |
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return new ConditionObject(); |
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} |
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public void unlock() { sync.releaseExclusive(1); } |
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public Condition newCondition() { return sync.newCondition(); } |
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public boolean isLocked() { return sync.get() != 0; } |
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public boolean hasQueuedThreads() { return sync.hasQueuedThreads(); } |
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} |
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|
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/** |
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* A runnable calling lockInterruptibly |
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* A minimal latch class, to test shared mode. |
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*/ |
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class InterruptibleLockRunnable implements Runnable { |
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final Mutex lock; |
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InterruptibleLockRunnable(Mutex l) { lock = l; } |
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public void run() { |
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try { |
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lock.lockInterruptibly(); |
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} catch(InterruptedException success){} |
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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 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 lockInterruptibly that expects to be |
126 |
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* interrupted |
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* A runnable calling acquireInterruptibly that expects to be |
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> |
* interrupted. |
127 |
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*/ |
128 |
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class InterruptedLockRunnable implements Runnable { |
129 |
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final Mutex lock; |
130 |
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InterruptedLockRunnable(Mutex l) { lock = l; } |
131 |
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public void run() { |
132 |
< |
try { |
97 |
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lock.lockInterruptibly(); |
98 |
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threadShouldThrow(); |
99 |
< |
} catch(InterruptedException success){} |
128 |
> |
class InterruptedSyncRunnable extends CheckedInterruptedRunnable { |
129 |
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final Mutex sync; |
130 |
> |
InterruptedSyncRunnable(Mutex sync) { this.sync = sync; } |
131 |
> |
public void realRun() throws InterruptedException { |
132 |
> |
sync.acquireInterruptibly(); |
133 |
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} |
134 |
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} |
135 |
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|
135 |
> |
|
136 |
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/** A constant to clarify calls to checking methods below. */ |
137 |
> |
static final Thread[] NO_THREADS = new Thread[0]; |
138 |
> |
|
139 |
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/** |
140 |
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* locking an unlocked lock succeeds |
140 |
> |
* Spin-waits until sync.isQueued(t) becomes true. |
141 |
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*/ |
142 |
< |
public void testLock() { |
143 |
< |
Mutex rl = new Mutex(); |
144 |
< |
rl.lock(); |
145 |
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assertTrue(rl.isLocked()); |
146 |
< |
rl.unlock(); |
142 |
> |
void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) { |
143 |
> |
long startTime = System.nanoTime(); |
144 |
> |
while (!sync.isQueued(t)) { |
145 |
> |
if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
146 |
> |
throw new AssertionError("timed out"); |
147 |
> |
Thread.yield(); |
148 |
> |
} |
149 |
> |
assertTrue(t.isAlive()); |
150 |
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} |
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|
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/** |
153 |
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* tryLock on an unlocked lock succeeds |
153 |
> |
* Checks that sync has exactly the given queued threads. |
154 |
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*/ |
155 |
< |
public void testTryLock() { |
156 |
< |
Mutex rl = new Mutex(); |
157 |
< |
assertTrue(rl.tryLock()); |
158 |
< |
assertTrue(rl.isLocked()); |
159 |
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rl.unlock(); |
155 |
> |
void assertHasQueuedThreads(AbstractQueuedSynchronizer sync, |
156 |
> |
Thread... expected) { |
157 |
> |
Collection<Thread> actual = sync.getQueuedThreads(); |
158 |
> |
assertEquals(expected.length > 0, sync.hasQueuedThreads()); |
159 |
> |
assertEquals(expected.length, sync.getQueueLength()); |
160 |
> |
assertEquals(expected.length, actual.size()); |
161 |
> |
assertEquals(expected.length == 0, actual.isEmpty()); |
162 |
> |
assertEquals(new HashSet<Thread>(actual), |
163 |
> |
new HashSet<Thread>(Arrays.asList(expected))); |
164 |
|
} |
165 |
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|
166 |
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/** |
167 |
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* hasQueuedThreads reports whether there are waiting threads |
167 |
> |
* Checks that sync has exactly the given (exclusive) queued threads. |
168 |
|
*/ |
169 |
< |
public void testhasQueuedThreads() { |
170 |
< |
final Mutex lock = new Mutex(); |
171 |
< |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
172 |
< |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
173 |
< |
try { |
174 |
< |
assertFalse(lock.hasQueuedThreads()); |
175 |
< |
lock.lock(); |
176 |
< |
t1.start(); |
177 |
< |
Thread.sleep(SHORT_DELAY_MS); |
178 |
< |
assertTrue(lock.hasQueuedThreads()); |
179 |
< |
t2.start(); |
180 |
< |
Thread.sleep(SHORT_DELAY_MS); |
181 |
< |
assertTrue(lock.hasQueuedThreads()); |
182 |
< |
t1.interrupt(); |
183 |
< |
Thread.sleep(SHORT_DELAY_MS); |
184 |
< |
assertTrue(lock.hasQueuedThreads()); |
185 |
< |
lock.unlock(); |
186 |
< |
Thread.sleep(SHORT_DELAY_MS); |
187 |
< |
assertFalse(lock.hasQueuedThreads()); |
188 |
< |
t1.join(); |
189 |
< |
t2.join(); |
190 |
< |
} catch(Exception e){ |
191 |
< |
unexpectedException(); |
192 |
< |
} |
193 |
< |
} |
194 |
< |
|
195 |
< |
/** |
196 |
< |
* timed tryLock is interruptible. |
197 |
< |
*/ |
198 |
< |
public void testInterruptedException2() { |
156 |
< |
final Mutex lock = new Mutex(); |
157 |
< |
lock.lock(); |
158 |
< |
Thread t = new Thread(new Runnable() { |
159 |
< |
public void run() { |
160 |
< |
try { |
161 |
< |
lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS); |
162 |
< |
threadShouldThrow(); |
163 |
< |
} catch(InterruptedException success){} |
164 |
< |
} |
165 |
< |
}); |
166 |
< |
try { |
167 |
< |
t.start(); |
168 |
< |
t.interrupt(); |
169 |
< |
} catch(Exception e){ |
170 |
< |
unexpectedException(); |
171 |
< |
} |
169 |
> |
void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync, |
170 |
> |
Thread... expected) { |
171 |
> |
assertHasQueuedThreads(sync, expected); |
172 |
> |
assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()), |
173 |
> |
new HashSet<Thread>(sync.getQueuedThreads())); |
174 |
> |
assertEquals(0, sync.getSharedQueuedThreads().size()); |
175 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
176 |
> |
} |
177 |
> |
|
178 |
> |
/** |
179 |
> |
* Checks that sync has exactly the given (shared) queued threads. |
180 |
> |
*/ |
181 |
> |
void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync, |
182 |
> |
Thread... expected) { |
183 |
> |
assertHasQueuedThreads(sync, expected); |
184 |
> |
assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()), |
185 |
> |
new HashSet<Thread>(sync.getQueuedThreads())); |
186 |
> |
assertEquals(0, sync.getExclusiveQueuedThreads().size()); |
187 |
> |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
188 |
> |
} |
189 |
> |
|
190 |
> |
/** |
191 |
> |
* Checks that condition c has exactly the given waiter threads, |
192 |
> |
* after acquiring mutex. |
193 |
> |
*/ |
194 |
> |
void assertHasWaitersUnlocked(Mutex sync, ConditionObject c, |
195 |
> |
Thread... threads) { |
196 |
> |
sync.acquire(); |
197 |
> |
assertHasWaitersLocked(sync, c, threads); |
198 |
> |
sync.release(); |
199 |
|
} |
200 |
|
|
201 |
+ |
/** |
202 |
+ |
* Checks that condition c has exactly the given waiter threads. |
203 |
+ |
*/ |
204 |
+ |
void assertHasWaitersLocked(Mutex sync, ConditionObject c, |
205 |
+ |
Thread... threads) { |
206 |
+ |
assertEquals(threads.length > 0, sync.hasWaiters(c)); |
207 |
+ |
assertEquals(threads.length, sync.getWaitQueueLength(c)); |
208 |
+ |
assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty()); |
209 |
+ |
assertEquals(threads.length, sync.getWaitingThreads(c).size()); |
210 |
+ |
assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)), |
211 |
+ |
new HashSet<Thread>(Arrays.asList(threads))); |
212 |
+ |
} |
213 |
+ |
|
214 |
+ |
enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil } |
215 |
|
|
216 |
|
/** |
217 |
< |
* TryLock on a locked lock fails |
218 |
< |
*/ |
219 |
< |
public void testTryLockWhenLocked() { |
220 |
< |
final Mutex lock = new Mutex(); |
221 |
< |
lock.lock(); |
222 |
< |
Thread t = new Thread(new Runnable() { |
223 |
< |
public void run() { |
224 |
< |
threadAssertFalse(lock.tryLock()); |
225 |
< |
} |
226 |
< |
}); |
227 |
< |
try { |
228 |
< |
t.start(); |
229 |
< |
t.join(); |
230 |
< |
lock.unlock(); |
231 |
< |
} catch(Exception e){ |
232 |
< |
unexpectedException(); |
233 |
< |
} |
234 |
< |
} |
235 |
< |
|
236 |
< |
/** |
237 |
< |
* Timed tryLock on a locked lock times out |
238 |
< |
*/ |
198 |
< |
public void testTryLock_Timeout() { |
199 |
< |
final Mutex lock = new Mutex(); |
200 |
< |
lock.lock(); |
201 |
< |
Thread t = new Thread(new Runnable() { |
202 |
< |
public void run() { |
203 |
< |
try { |
204 |
< |
threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS)); |
205 |
< |
} catch (Exception ex) { |
206 |
< |
threadUnexpectedException(); |
207 |
< |
} |
208 |
< |
} |
209 |
< |
}); |
210 |
< |
try { |
211 |
< |
t.start(); |
212 |
< |
t.join(); |
213 |
< |
lock.unlock(); |
214 |
< |
} catch(Exception e){ |
215 |
< |
unexpectedException(); |
216 |
< |
} |
217 |
< |
} |
218 |
< |
|
219 |
< |
|
220 |
< |
/** |
221 |
< |
* isLocked is true when locked and false when not |
222 |
< |
*/ |
223 |
< |
public void testIsLocked() { |
224 |
< |
final Mutex lock = new Mutex(); |
225 |
< |
lock.lock(); |
226 |
< |
assertTrue(lock.isLocked()); |
227 |
< |
lock.unlock(); |
228 |
< |
assertFalse(lock.isLocked()); |
229 |
< |
Thread t = new Thread(new Runnable() { |
230 |
< |
public void run() { |
231 |
< |
lock.lock(); |
232 |
< |
try { |
233 |
< |
Thread.sleep(SMALL_DELAY_MS); |
234 |
< |
} |
235 |
< |
catch(Exception e) { |
236 |
< |
threadUnexpectedException(); |
237 |
< |
} |
238 |
< |
lock.unlock(); |
239 |
< |
} |
240 |
< |
}); |
241 |
< |
try { |
242 |
< |
t.start(); |
243 |
< |
Thread.sleep(SHORT_DELAY_MS); |
244 |
< |
assertTrue(lock.isLocked()); |
245 |
< |
t.join(); |
246 |
< |
assertFalse(lock.isLocked()); |
247 |
< |
} catch(Exception e){ |
248 |
< |
unexpectedException(); |
217 |
> |
* Awaits condition using the specified AwaitMethod. |
218 |
> |
*/ |
219 |
> |
void await(ConditionObject c, AwaitMethod awaitMethod) |
220 |
> |
throws InterruptedException { |
221 |
> |
long timeoutMillis = 2 * LONG_DELAY_MS; |
222 |
> |
switch (awaitMethod) { |
223 |
> |
case await: |
224 |
> |
c.await(); |
225 |
> |
break; |
226 |
> |
case awaitTimed: |
227 |
> |
assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
228 |
> |
break; |
229 |
> |
case awaitNanos: |
230 |
> |
long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
231 |
> |
long nanosRemaining = c.awaitNanos(timeoutNanos); |
232 |
> |
assertTrue(nanosRemaining > 0); |
233 |
> |
break; |
234 |
> |
case awaitUntil: |
235 |
> |
assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
236 |
> |
break; |
237 |
> |
default: |
238 |
> |
throw new AssertionError(); |
239 |
|
} |
240 |
|
} |
241 |
|
|
242 |
+ |
/** |
243 |
+ |
* Checks that awaiting the given condition times out (using the |
244 |
+ |
* default timeout duration). |
245 |
+ |
*/ |
246 |
+ |
void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) { |
247 |
+ |
final long timeoutMillis = timeoutMillis(); |
248 |
+ |
final long startTime; |
249 |
+ |
try { |
250 |
+ |
switch (awaitMethod) { |
251 |
+ |
case awaitTimed: |
252 |
+ |
startTime = System.nanoTime(); |
253 |
+ |
assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
254 |
+ |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
255 |
+ |
break; |
256 |
+ |
case awaitNanos: |
257 |
+ |
startTime = System.nanoTime(); |
258 |
+ |
long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis); |
259 |
+ |
long nanosRemaining = c.awaitNanos(timeoutNanos); |
260 |
+ |
assertTrue(nanosRemaining <= 0); |
261 |
+ |
assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS)); |
262 |
+ |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
263 |
+ |
break; |
264 |
+ |
case awaitUntil: |
265 |
+ |
// We shouldn't assume that nanoTime and currentTimeMillis |
266 |
+ |
// use the same time source, so don't use nanoTime here. |
267 |
+ |
java.util.Date delayedDate = delayedDate(timeoutMillis); |
268 |
+ |
assertFalse(c.awaitUntil(delayedDate(timeoutMillis))); |
269 |
+ |
assertTrue(new java.util.Date().getTime() >= delayedDate.getTime()); |
270 |
+ |
break; |
271 |
+ |
default: |
272 |
+ |
throw new UnsupportedOperationException(); |
273 |
+ |
} |
274 |
+ |
} catch (InterruptedException ie) { threadUnexpectedException(ie); } |
275 |
+ |
} |
276 |
+ |
|
277 |
+ |
/** |
278 |
+ |
* isHeldExclusively is false upon construction |
279 |
+ |
*/ |
280 |
+ |
public void testIsHeldExclusively() { |
281 |
+ |
Mutex sync = new Mutex(); |
282 |
+ |
assertFalse(sync.isHeldExclusively()); |
283 |
+ |
} |
284 |
+ |
|
285 |
+ |
/** |
286 |
+ |
* acquiring released sync succeeds |
287 |
+ |
*/ |
288 |
+ |
public void testAcquire() { |
289 |
+ |
Mutex sync = new Mutex(); |
290 |
+ |
sync.acquire(); |
291 |
+ |
assertTrue(sync.isHeldExclusively()); |
292 |
+ |
sync.release(); |
293 |
+ |
assertFalse(sync.isHeldExclusively()); |
294 |
+ |
} |
295 |
+ |
|
296 |
+ |
/** |
297 |
+ |
* tryAcquire on a released sync succeeds |
298 |
+ |
*/ |
299 |
+ |
public void testTryAcquire() { |
300 |
+ |
Mutex sync = new Mutex(); |
301 |
+ |
assertTrue(sync.tryAcquire()); |
302 |
+ |
assertTrue(sync.isHeldExclusively()); |
303 |
+ |
sync.release(); |
304 |
+ |
assertFalse(sync.isHeldExclusively()); |
305 |
+ |
} |
306 |
|
|
307 |
|
/** |
308 |
< |
* lockInterruptibly is interruptible. |
309 |
< |
*/ |
310 |
< |
public void testLockInterruptibly1() { |
311 |
< |
final Mutex lock = new Mutex(); |
312 |
< |
lock.lock(); |
313 |
< |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
314 |
< |
try { |
315 |
< |
t.start(); |
316 |
< |
t.interrupt(); |
317 |
< |
lock.unlock(); |
318 |
< |
t.join(); |
319 |
< |
} catch(Exception e){ |
320 |
< |
unexpectedException(); |
321 |
< |
} |
322 |
< |
} |
323 |
< |
|
324 |
< |
/** |
325 |
< |
* lockInterruptibly succeeds when unlocked, else is interruptible |
326 |
< |
*/ |
327 |
< |
public void testLockInterruptibly2() { |
328 |
< |
final Mutex lock = new Mutex(); |
329 |
< |
try { |
330 |
< |
lock.lockInterruptibly(); |
331 |
< |
} catch(Exception e) { |
332 |
< |
unexpectedException(); |
279 |
< |
} |
280 |
< |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
281 |
< |
try { |
282 |
< |
t.start(); |
283 |
< |
t.interrupt(); |
284 |
< |
assertTrue(lock.isLocked()); |
285 |
< |
t.join(); |
286 |
< |
} catch(Exception e){ |
287 |
< |
unexpectedException(); |
288 |
< |
} |
289 |
< |
} |
290 |
< |
|
291 |
< |
/** |
292 |
< |
* Calling await without holding lock throws IllegalMonitorStateException |
293 |
< |
*/ |
294 |
< |
public void testAwait_IllegalMonitor() { |
295 |
< |
final Mutex lock = new Mutex(); |
296 |
< |
final Condition c = lock.newCondition(); |
308 |
> |
* hasQueuedThreads reports whether there are waiting threads |
309 |
> |
*/ |
310 |
> |
public void testHasQueuedThreads() { |
311 |
> |
final Mutex sync = new Mutex(); |
312 |
> |
assertFalse(sync.hasQueuedThreads()); |
313 |
> |
sync.acquire(); |
314 |
> |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
315 |
> |
waitForQueuedThread(sync, t1); |
316 |
> |
assertTrue(sync.hasQueuedThreads()); |
317 |
> |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
318 |
> |
waitForQueuedThread(sync, t2); |
319 |
> |
assertTrue(sync.hasQueuedThreads()); |
320 |
> |
t1.interrupt(); |
321 |
> |
awaitTermination(t1); |
322 |
> |
assertTrue(sync.hasQueuedThreads()); |
323 |
> |
sync.release(); |
324 |
> |
awaitTermination(t2); |
325 |
> |
assertFalse(sync.hasQueuedThreads()); |
326 |
> |
} |
327 |
> |
|
328 |
> |
/** |
329 |
> |
* isQueued(null) throws NullPointerException |
330 |
> |
*/ |
331 |
> |
public void testIsQueuedNPE() { |
332 |
> |
final Mutex sync = new Mutex(); |
333 |
|
try { |
334 |
< |
c.await(); |
334 |
> |
sync.isQueued(null); |
335 |
|
shouldThrow(); |
336 |
< |
} |
337 |
< |
catch (IllegalMonitorStateException success) { |
338 |
< |
} |
339 |
< |
catch (Exception ex) { |
340 |
< |
unexpectedException(); |
336 |
> |
} catch (NullPointerException success) {} |
337 |
> |
} |
338 |
> |
|
339 |
> |
/** |
340 |
> |
* isQueued reports whether a thread is queued |
341 |
> |
*/ |
342 |
> |
public void testIsQueued() { |
343 |
> |
final Mutex sync = new Mutex(); |
344 |
> |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
345 |
> |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
346 |
> |
assertFalse(sync.isQueued(t1)); |
347 |
> |
assertFalse(sync.isQueued(t2)); |
348 |
> |
sync.acquire(); |
349 |
> |
t1.start(); |
350 |
> |
waitForQueuedThread(sync, t1); |
351 |
> |
assertTrue(sync.isQueued(t1)); |
352 |
> |
assertFalse(sync.isQueued(t2)); |
353 |
> |
t2.start(); |
354 |
> |
waitForQueuedThread(sync, t2); |
355 |
> |
assertTrue(sync.isQueued(t1)); |
356 |
> |
assertTrue(sync.isQueued(t2)); |
357 |
> |
t1.interrupt(); |
358 |
> |
awaitTermination(t1); |
359 |
> |
assertFalse(sync.isQueued(t1)); |
360 |
> |
assertTrue(sync.isQueued(t2)); |
361 |
> |
sync.release(); |
362 |
> |
awaitTermination(t2); |
363 |
> |
assertFalse(sync.isQueued(t1)); |
364 |
> |
assertFalse(sync.isQueued(t2)); |
365 |
> |
} |
366 |
> |
|
367 |
> |
/** |
368 |
> |
* getFirstQueuedThread returns first waiting thread or null if none |
369 |
> |
*/ |
370 |
> |
public void testGetFirstQueuedThread() { |
371 |
> |
final Mutex sync = new Mutex(); |
372 |
> |
assertNull(sync.getFirstQueuedThread()); |
373 |
> |
sync.acquire(); |
374 |
> |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
375 |
> |
waitForQueuedThread(sync, t1); |
376 |
> |
assertEquals(t1, sync.getFirstQueuedThread()); |
377 |
> |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
378 |
> |
waitForQueuedThread(sync, t2); |
379 |
> |
assertEquals(t1, sync.getFirstQueuedThread()); |
380 |
> |
t1.interrupt(); |
381 |
> |
awaitTermination(t1); |
382 |
> |
assertEquals(t2, sync.getFirstQueuedThread()); |
383 |
> |
sync.release(); |
384 |
> |
awaitTermination(t2); |
385 |
> |
assertNull(sync.getFirstQueuedThread()); |
386 |
> |
} |
387 |
> |
|
388 |
> |
/** |
389 |
> |
* hasContended reports false if no thread has ever blocked, else true |
390 |
> |
*/ |
391 |
> |
public void testHasContended() { |
392 |
> |
final Mutex sync = new Mutex(); |
393 |
> |
assertFalse(sync.hasContended()); |
394 |
> |
sync.acquire(); |
395 |
> |
assertFalse(sync.hasContended()); |
396 |
> |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
397 |
> |
waitForQueuedThread(sync, t1); |
398 |
> |
assertTrue(sync.hasContended()); |
399 |
> |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
400 |
> |
waitForQueuedThread(sync, t2); |
401 |
> |
assertTrue(sync.hasContended()); |
402 |
> |
t1.interrupt(); |
403 |
> |
awaitTermination(t1); |
404 |
> |
assertTrue(sync.hasContended()); |
405 |
> |
sync.release(); |
406 |
> |
awaitTermination(t2); |
407 |
> |
assertTrue(sync.hasContended()); |
408 |
> |
} |
409 |
> |
|
410 |
> |
/** |
411 |
> |
* getQueuedThreads returns all waiting threads |
412 |
> |
*/ |
413 |
> |
public void testGetQueuedThreads() { |
414 |
> |
final Mutex sync = new Mutex(); |
415 |
> |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
416 |
> |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
417 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
418 |
> |
sync.acquire(); |
419 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
420 |
> |
t1.start(); |
421 |
> |
waitForQueuedThread(sync, t1); |
422 |
> |
assertHasExclusiveQueuedThreads(sync, t1); |
423 |
> |
assertTrue(sync.getQueuedThreads().contains(t1)); |
424 |
> |
assertFalse(sync.getQueuedThreads().contains(t2)); |
425 |
> |
t2.start(); |
426 |
> |
waitForQueuedThread(sync, t2); |
427 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
428 |
> |
assertTrue(sync.getQueuedThreads().contains(t1)); |
429 |
> |
assertTrue(sync.getQueuedThreads().contains(t2)); |
430 |
> |
t1.interrupt(); |
431 |
> |
awaitTermination(t1); |
432 |
> |
assertHasExclusiveQueuedThreads(sync, t2); |
433 |
> |
sync.release(); |
434 |
> |
awaitTermination(t2); |
435 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
436 |
> |
} |
437 |
> |
|
438 |
> |
/** |
439 |
> |
* getExclusiveQueuedThreads returns all exclusive waiting threads |
440 |
> |
*/ |
441 |
> |
public void testGetExclusiveQueuedThreads() { |
442 |
> |
final Mutex sync = new Mutex(); |
443 |
> |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
444 |
> |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
445 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
446 |
> |
sync.acquire(); |
447 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
448 |
> |
t1.start(); |
449 |
> |
waitForQueuedThread(sync, t1); |
450 |
> |
assertHasExclusiveQueuedThreads(sync, t1); |
451 |
> |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
452 |
> |
assertFalse(sync.getExclusiveQueuedThreads().contains(t2)); |
453 |
> |
t2.start(); |
454 |
> |
waitForQueuedThread(sync, t2); |
455 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
456 |
> |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
457 |
> |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
458 |
> |
t1.interrupt(); |
459 |
> |
awaitTermination(t1); |
460 |
> |
assertHasExclusiveQueuedThreads(sync, t2); |
461 |
> |
sync.release(); |
462 |
> |
awaitTermination(t2); |
463 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
464 |
> |
} |
465 |
> |
|
466 |
> |
/** |
467 |
> |
* getSharedQueuedThreads does not include exclusively waiting threads |
468 |
> |
*/ |
469 |
> |
public void testGetSharedQueuedThreads_Exclusive() { |
470 |
> |
final Mutex sync = new Mutex(); |
471 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
472 |
> |
sync.acquire(); |
473 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
474 |
> |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
475 |
> |
waitForQueuedThread(sync, t1); |
476 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
477 |
> |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
478 |
> |
waitForQueuedThread(sync, t2); |
479 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
480 |
> |
t1.interrupt(); |
481 |
> |
awaitTermination(t1); |
482 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
483 |
> |
sync.release(); |
484 |
> |
awaitTermination(t2); |
485 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
486 |
> |
} |
487 |
> |
|
488 |
> |
/** |
489 |
> |
* getSharedQueuedThreads returns all shared waiting threads |
490 |
> |
*/ |
491 |
> |
public void testGetSharedQueuedThreads_Shared() { |
492 |
> |
final BooleanLatch l = new BooleanLatch(); |
493 |
> |
assertHasSharedQueuedThreads(l, NO_THREADS); |
494 |
> |
Thread t1 = newStartedThread(new CheckedInterruptedRunnable() { |
495 |
> |
public void realRun() throws InterruptedException { |
496 |
> |
l.acquireSharedInterruptibly(0); |
497 |
> |
}}); |
498 |
> |
waitForQueuedThread(l, t1); |
499 |
> |
assertHasSharedQueuedThreads(l, t1); |
500 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
501 |
> |
public void realRun() throws InterruptedException { |
502 |
> |
l.acquireSharedInterruptibly(0); |
503 |
> |
}}); |
504 |
> |
waitForQueuedThread(l, t2); |
505 |
> |
assertHasSharedQueuedThreads(l, t1, t2); |
506 |
> |
t1.interrupt(); |
507 |
> |
awaitTermination(t1); |
508 |
> |
assertHasSharedQueuedThreads(l, t2); |
509 |
> |
assertTrue(l.releaseShared(0)); |
510 |
> |
awaitTermination(t2); |
511 |
> |
assertHasSharedQueuedThreads(l, NO_THREADS); |
512 |
> |
} |
513 |
> |
|
514 |
> |
/** |
515 |
> |
* tryAcquireNanos is interruptible |
516 |
> |
*/ |
517 |
> |
public void testTryAcquireNanos_Interruptible() { |
518 |
> |
final Mutex sync = new Mutex(); |
519 |
> |
sync.acquire(); |
520 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
521 |
> |
public void realRun() throws InterruptedException { |
522 |
> |
sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); |
523 |
> |
}}); |
524 |
> |
|
525 |
> |
waitForQueuedThread(sync, t); |
526 |
> |
t.interrupt(); |
527 |
> |
awaitTermination(t); |
528 |
> |
} |
529 |
> |
|
530 |
> |
/** |
531 |
> |
* tryAcquire on exclusively held sync fails |
532 |
> |
*/ |
533 |
> |
public void testTryAcquireWhenSynced() { |
534 |
> |
final Mutex sync = new Mutex(); |
535 |
> |
sync.acquire(); |
536 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
537 |
> |
public void realRun() { |
538 |
> |
assertFalse(sync.tryAcquire()); |
539 |
> |
}}); |
540 |
> |
|
541 |
> |
awaitTermination(t); |
542 |
> |
sync.release(); |
543 |
> |
} |
544 |
> |
|
545 |
> |
/** |
546 |
> |
* tryAcquireNanos on an exclusively held sync times out |
547 |
> |
*/ |
548 |
> |
public void testAcquireNanos_Timeout() { |
549 |
> |
final Mutex sync = new Mutex(); |
550 |
> |
sync.acquire(); |
551 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
552 |
> |
public void realRun() throws InterruptedException { |
553 |
> |
long startTime = System.nanoTime(); |
554 |
> |
long nanos = MILLISECONDS.toNanos(timeoutMillis()); |
555 |
> |
assertFalse(sync.tryAcquireNanos(nanos)); |
556 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
557 |
> |
}}); |
558 |
> |
|
559 |
> |
awaitTermination(t); |
560 |
> |
sync.release(); |
561 |
> |
} |
562 |
> |
|
563 |
> |
/** |
564 |
> |
* getState is true when acquired and false when not |
565 |
> |
*/ |
566 |
> |
public void testGetState() { |
567 |
> |
final Mutex sync = new Mutex(); |
568 |
> |
sync.acquire(); |
569 |
> |
assertTrue(sync.isHeldExclusively()); |
570 |
> |
sync.release(); |
571 |
> |
assertFalse(sync.isHeldExclusively()); |
572 |
> |
|
573 |
> |
final BooleanLatch acquired = new BooleanLatch(); |
574 |
> |
final BooleanLatch done = new BooleanLatch(); |
575 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
576 |
> |
public void realRun() throws InterruptedException { |
577 |
> |
sync.acquire(); |
578 |
> |
assertTrue(acquired.releaseShared(0)); |
579 |
> |
done.acquireShared(0); |
580 |
> |
sync.release(); |
581 |
> |
}}); |
582 |
> |
|
583 |
> |
acquired.acquireShared(0); |
584 |
> |
assertTrue(sync.isHeldExclusively()); |
585 |
> |
assertTrue(done.releaseShared(0)); |
586 |
> |
awaitTermination(t); |
587 |
> |
assertFalse(sync.isHeldExclusively()); |
588 |
> |
} |
589 |
> |
|
590 |
> |
/** |
591 |
> |
* acquireInterruptibly succeeds when released, else is interruptible |
592 |
> |
*/ |
593 |
> |
public void testAcquireInterruptibly() throws InterruptedException { |
594 |
> |
final Mutex sync = new Mutex(); |
595 |
> |
final BooleanLatch threadStarted = new BooleanLatch(); |
596 |
> |
sync.acquireInterruptibly(); |
597 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
598 |
> |
public void realRun() throws InterruptedException { |
599 |
> |
assertTrue(threadStarted.releaseShared(0)); |
600 |
> |
sync.acquireInterruptibly(); |
601 |
> |
}}); |
602 |
> |
|
603 |
> |
threadStarted.acquireShared(0); |
604 |
> |
waitForQueuedThread(sync, t); |
605 |
> |
t.interrupt(); |
606 |
> |
awaitTermination(t); |
607 |
> |
assertTrue(sync.isHeldExclusively()); |
608 |
> |
} |
609 |
> |
|
610 |
> |
/** |
611 |
> |
* owns is true for a condition created by sync else false |
612 |
> |
*/ |
613 |
> |
public void testOwns() { |
614 |
> |
final Mutex sync = new Mutex(); |
615 |
> |
final ConditionObject c = sync.newCondition(); |
616 |
> |
final Mutex sync2 = new Mutex(); |
617 |
> |
assertTrue(sync.owns(c)); |
618 |
> |
assertFalse(sync2.owns(c)); |
619 |
> |
} |
620 |
> |
|
621 |
> |
/** |
622 |
> |
* Calling await without holding sync throws IllegalMonitorStateException |
623 |
> |
*/ |
624 |
> |
public void testAwait_IMSE() { |
625 |
> |
final Mutex sync = new Mutex(); |
626 |
> |
final ConditionObject c = sync.newCondition(); |
627 |
> |
for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
628 |
> |
long startTime = System.nanoTime(); |
629 |
> |
try { |
630 |
> |
await(c, awaitMethod); |
631 |
> |
shouldThrow(); |
632 |
> |
} catch (IllegalMonitorStateException success) { |
633 |
> |
} catch (InterruptedException e) { threadUnexpectedException(e); } |
634 |
> |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
635 |
|
} |
636 |
|
} |
637 |
|
|
638 |
|
/** |
639 |
< |
* Calling signal without holding lock throws IllegalMonitorStateException |
639 |
> |
* Calling signal without holding sync throws IllegalMonitorStateException |
640 |
|
*/ |
641 |
< |
public void testSignal_IllegalMonitor() { |
642 |
< |
final Mutex lock = new Mutex(); |
643 |
< |
final Condition c = lock.newCondition(); |
641 |
> |
public void testSignal_IMSE() { |
642 |
> |
final Mutex sync = new Mutex(); |
643 |
> |
final ConditionObject c = sync.newCondition(); |
644 |
|
try { |
645 |
|
c.signal(); |
646 |
|
shouldThrow(); |
647 |
< |
} |
648 |
< |
catch (IllegalMonitorStateException success) { |
319 |
< |
} |
320 |
< |
catch (Exception ex) { |
321 |
< |
unexpectedException(); |
322 |
< |
} |
647 |
> |
} catch (IllegalMonitorStateException success) {} |
648 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
649 |
|
} |
650 |
|
|
651 |
|
/** |
652 |
< |
* awaitNanos without a signal times out |
652 |
> |
* Calling signalAll without holding sync throws IllegalMonitorStateException |
653 |
|
*/ |
654 |
< |
public void testAwaitNanos_Timeout() { |
655 |
< |
final Mutex lock = new Mutex(); |
656 |
< |
final Condition c = lock.newCondition(); |
654 |
> |
public void testSignalAll_IMSE() { |
655 |
> |
final Mutex sync = new Mutex(); |
656 |
> |
final ConditionObject c = sync.newCondition(); |
657 |
|
try { |
658 |
< |
lock.lock(); |
659 |
< |
long t = c.awaitNanos(100); |
660 |
< |
assertTrue(t <= 0); |
335 |
< |
lock.unlock(); |
336 |
< |
} |
337 |
< |
catch (Exception ex) { |
338 |
< |
unexpectedException(); |
339 |
< |
} |
658 |
> |
c.signalAll(); |
659 |
> |
shouldThrow(); |
660 |
> |
} catch (IllegalMonitorStateException success) {} |
661 |
|
} |
662 |
|
|
663 |
|
/** |
664 |
< |
* timed await without a signal times out |
664 |
> |
* await/awaitNanos/awaitUntil without a signal times out |
665 |
|
*/ |
666 |
< |
public void testAwait_Timeout() { |
667 |
< |
final Mutex lock = new Mutex(); |
668 |
< |
final Condition c = lock.newCondition(); |
666 |
> |
public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); } |
667 |
> |
public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); } |
668 |
> |
public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); } |
669 |
> |
public void testAwait_Timeout(AwaitMethod awaitMethod) { |
670 |
> |
final Mutex sync = new Mutex(); |
671 |
> |
final ConditionObject c = sync.newCondition(); |
672 |
> |
sync.acquire(); |
673 |
> |
assertAwaitTimesOut(c, awaitMethod); |
674 |
> |
sync.release(); |
675 |
> |
} |
676 |
> |
|
677 |
> |
/** |
678 |
> |
* await/awaitNanos/awaitUntil returns when signalled |
679 |
> |
*/ |
680 |
> |
public void testSignal_await() { testSignal(AwaitMethod.await); } |
681 |
> |
public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); } |
682 |
> |
public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); } |
683 |
> |
public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); } |
684 |
> |
public void testSignal(final AwaitMethod awaitMethod) { |
685 |
> |
final Mutex sync = new Mutex(); |
686 |
> |
final ConditionObject c = sync.newCondition(); |
687 |
> |
final BooleanLatch acquired = new BooleanLatch(); |
688 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
689 |
> |
public void realRun() throws InterruptedException { |
690 |
> |
sync.acquire(); |
691 |
> |
assertTrue(acquired.releaseShared(0)); |
692 |
> |
await(c, awaitMethod); |
693 |
> |
sync.release(); |
694 |
> |
}}); |
695 |
> |
|
696 |
> |
acquired.acquireShared(0); |
697 |
> |
sync.acquire(); |
698 |
> |
assertHasWaitersLocked(sync, c, t); |
699 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
700 |
> |
c.signal(); |
701 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
702 |
> |
assertHasExclusiveQueuedThreads(sync, t); |
703 |
> |
sync.release(); |
704 |
> |
awaitTermination(t); |
705 |
> |
} |
706 |
> |
|
707 |
> |
/** |
708 |
> |
* hasWaiters(null) throws NullPointerException |
709 |
> |
*/ |
710 |
> |
public void testHasWaitersNPE() { |
711 |
> |
final Mutex sync = new Mutex(); |
712 |
|
try { |
713 |
< |
lock.lock(); |
714 |
< |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
715 |
< |
lock.unlock(); |
352 |
< |
} |
353 |
< |
catch (Exception ex) { |
354 |
< |
unexpectedException(); |
355 |
< |
} |
713 |
> |
sync.hasWaiters(null); |
714 |
> |
shouldThrow(); |
715 |
> |
} catch (NullPointerException success) {} |
716 |
|
} |
717 |
|
|
718 |
|
/** |
719 |
< |
* awaitUntil without a signal times out |
719 |
> |
* getWaitQueueLength(null) throws NullPointerException |
720 |
|
*/ |
721 |
< |
public void testAwaitUntil_Timeout() { |
722 |
< |
final Mutex lock = new Mutex(); |
363 |
< |
final Condition c = lock.newCondition(); |
721 |
> |
public void testGetWaitQueueLengthNPE() { |
722 |
> |
final Mutex sync = new Mutex(); |
723 |
|
try { |
724 |
< |
lock.lock(); |
725 |
< |
java.util.Date d = new java.util.Date(); |
726 |
< |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
727 |
< |
lock.unlock(); |
728 |
< |
} |
729 |
< |
catch (Exception ex) { |
730 |
< |
unexpectedException(); |
731 |
< |
} |
724 |
> |
sync.getWaitQueueLength(null); |
725 |
> |
shouldThrow(); |
726 |
> |
} catch (NullPointerException success) {} |
727 |
> |
} |
728 |
> |
|
729 |
> |
/** |
730 |
> |
* getWaitingThreads(null) throws NullPointerException |
731 |
> |
*/ |
732 |
> |
public void testGetWaitingThreadsNPE() { |
733 |
> |
final Mutex sync = new Mutex(); |
734 |
> |
try { |
735 |
> |
sync.getWaitingThreads(null); |
736 |
> |
shouldThrow(); |
737 |
> |
} catch (NullPointerException success) {} |
738 |
|
} |
739 |
|
|
740 |
|
/** |
741 |
< |
* await returns when signalled |
741 |
> |
* hasWaiters throws IllegalArgumentException if not owned |
742 |
|
*/ |
743 |
< |
public void testAwait() { |
744 |
< |
final Mutex lock = new Mutex(); |
745 |
< |
final Condition c = lock.newCondition(); |
746 |
< |
Thread t = new Thread(new Runnable() { |
747 |
< |
public void run() { |
748 |
< |
try { |
749 |
< |
lock.lock(); |
750 |
< |
c.await(); |
751 |
< |
lock.unlock(); |
752 |
< |
} |
388 |
< |
catch(InterruptedException e) { |
389 |
< |
threadUnexpectedException(); |
390 |
< |
} |
391 |
< |
} |
392 |
< |
}); |
743 |
> |
public void testHasWaitersIAE() { |
744 |
> |
final Mutex sync = new Mutex(); |
745 |
> |
final ConditionObject c = sync.newCondition(); |
746 |
> |
final Mutex sync2 = new Mutex(); |
747 |
> |
try { |
748 |
> |
sync2.hasWaiters(c); |
749 |
> |
shouldThrow(); |
750 |
> |
} catch (IllegalArgumentException success) {} |
751 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
752 |
> |
} |
753 |
|
|
754 |
+ |
/** |
755 |
+ |
* hasWaiters throws IllegalMonitorStateException if not synced |
756 |
+ |
*/ |
757 |
+ |
public void testHasWaitersIMSE() { |
758 |
+ |
final Mutex sync = new Mutex(); |
759 |
+ |
final ConditionObject c = sync.newCondition(); |
760 |
|
try { |
761 |
< |
t.start(); |
762 |
< |
Thread.sleep(SHORT_DELAY_MS); |
763 |
< |
lock.lock(); |
764 |
< |
c.signal(); |
765 |
< |
lock.unlock(); |
766 |
< |
t.join(SHORT_DELAY_MS); |
767 |
< |
assertFalse(t.isAlive()); |
761 |
> |
sync.hasWaiters(c); |
762 |
> |
shouldThrow(); |
763 |
> |
} catch (IllegalMonitorStateException success) {} |
764 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
765 |
> |
} |
766 |
> |
|
767 |
> |
/** |
768 |
> |
* getWaitQueueLength throws IllegalArgumentException if not owned |
769 |
> |
*/ |
770 |
> |
public void testGetWaitQueueLengthIAE() { |
771 |
> |
final Mutex sync = new Mutex(); |
772 |
> |
final ConditionObject c = sync.newCondition(); |
773 |
> |
final Mutex sync2 = new Mutex(); |
774 |
> |
try { |
775 |
> |
sync2.getWaitQueueLength(c); |
776 |
> |
shouldThrow(); |
777 |
> |
} catch (IllegalArgumentException success) {} |
778 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
779 |
> |
} |
780 |
> |
|
781 |
> |
/** |
782 |
> |
* getWaitQueueLength throws IllegalMonitorStateException if not synced |
783 |
> |
*/ |
784 |
> |
public void testGetWaitQueueLengthIMSE() { |
785 |
> |
final Mutex sync = new Mutex(); |
786 |
> |
final ConditionObject c = sync.newCondition(); |
787 |
> |
try { |
788 |
> |
sync.getWaitQueueLength(c); |
789 |
> |
shouldThrow(); |
790 |
> |
} catch (IllegalMonitorStateException success) {} |
791 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
792 |
> |
} |
793 |
> |
|
794 |
> |
/** |
795 |
> |
* getWaitingThreads throws IllegalArgumentException if not owned |
796 |
> |
*/ |
797 |
> |
public void testGetWaitingThreadsIAE() { |
798 |
> |
final Mutex sync = new Mutex(); |
799 |
> |
final ConditionObject c = sync.newCondition(); |
800 |
> |
final Mutex sync2 = new Mutex(); |
801 |
> |
try { |
802 |
> |
sync2.getWaitingThreads(c); |
803 |
> |
shouldThrow(); |
804 |
> |
} catch (IllegalArgumentException success) {} |
805 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
806 |
> |
} |
807 |
> |
|
808 |
> |
/** |
809 |
> |
* getWaitingThreads throws IllegalMonitorStateException if not synced |
810 |
> |
*/ |
811 |
> |
public void testGetWaitingThreadsIMSE() { |
812 |
> |
final Mutex sync = new Mutex(); |
813 |
> |
final ConditionObject c = sync.newCondition(); |
814 |
> |
try { |
815 |
> |
sync.getWaitingThreads(c); |
816 |
> |
shouldThrow(); |
817 |
> |
} catch (IllegalMonitorStateException success) {} |
818 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
819 |
> |
} |
820 |
> |
|
821 |
> |
/** |
822 |
> |
* hasWaiters returns true when a thread is waiting, else false |
823 |
> |
*/ |
824 |
> |
public void testHasWaiters() { |
825 |
> |
final Mutex sync = new Mutex(); |
826 |
> |
final ConditionObject c = sync.newCondition(); |
827 |
> |
final BooleanLatch acquired = new BooleanLatch(); |
828 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
829 |
> |
public void realRun() throws InterruptedException { |
830 |
> |
sync.acquire(); |
831 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
832 |
> |
assertFalse(sync.hasWaiters(c)); |
833 |
> |
assertTrue(acquired.releaseShared(0)); |
834 |
> |
c.await(); |
835 |
> |
sync.release(); |
836 |
> |
}}); |
837 |
> |
|
838 |
> |
acquired.acquireShared(0); |
839 |
> |
sync.acquire(); |
840 |
> |
assertHasWaitersLocked(sync, c, t); |
841 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
842 |
> |
assertTrue(sync.hasWaiters(c)); |
843 |
> |
c.signal(); |
844 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
845 |
> |
assertHasExclusiveQueuedThreads(sync, t); |
846 |
> |
assertFalse(sync.hasWaiters(c)); |
847 |
> |
sync.release(); |
848 |
> |
|
849 |
> |
awaitTermination(t); |
850 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
851 |
> |
} |
852 |
> |
|
853 |
> |
/** |
854 |
> |
* getWaitQueueLength returns number of waiting threads |
855 |
> |
*/ |
856 |
> |
public void testGetWaitQueueLength() { |
857 |
> |
final Mutex sync = new Mutex(); |
858 |
> |
final ConditionObject c = sync.newCondition(); |
859 |
> |
final BooleanLatch acquired1 = new BooleanLatch(); |
860 |
> |
final BooleanLatch acquired2 = new BooleanLatch(); |
861 |
> |
final Thread t1 = newStartedThread(new CheckedRunnable() { |
862 |
> |
public void realRun() throws InterruptedException { |
863 |
> |
sync.acquire(); |
864 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
865 |
> |
assertEquals(0, sync.getWaitQueueLength(c)); |
866 |
> |
assertTrue(acquired1.releaseShared(0)); |
867 |
> |
c.await(); |
868 |
> |
sync.release(); |
869 |
> |
}}); |
870 |
> |
acquired1.acquireShared(0); |
871 |
> |
sync.acquire(); |
872 |
> |
assertHasWaitersLocked(sync, c, t1); |
873 |
> |
assertEquals(1, sync.getWaitQueueLength(c)); |
874 |
> |
sync.release(); |
875 |
> |
|
876 |
> |
final Thread t2 = newStartedThread(new CheckedRunnable() { |
877 |
> |
public void realRun() throws InterruptedException { |
878 |
> |
sync.acquire(); |
879 |
> |
assertHasWaitersLocked(sync, c, t1); |
880 |
> |
assertEquals(1, sync.getWaitQueueLength(c)); |
881 |
> |
assertTrue(acquired2.releaseShared(0)); |
882 |
> |
c.await(); |
883 |
> |
sync.release(); |
884 |
> |
}}); |
885 |
> |
acquired2.acquireShared(0); |
886 |
> |
sync.acquire(); |
887 |
> |
assertHasWaitersLocked(sync, c, t1, t2); |
888 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
889 |
> |
assertEquals(2, sync.getWaitQueueLength(c)); |
890 |
> |
c.signalAll(); |
891 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
892 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
893 |
> |
assertEquals(0, sync.getWaitQueueLength(c)); |
894 |
> |
sync.release(); |
895 |
> |
|
896 |
> |
awaitTermination(t1); |
897 |
> |
awaitTermination(t2); |
898 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
899 |
> |
} |
900 |
> |
|
901 |
> |
/** |
902 |
> |
* getWaitingThreads returns only and all waiting threads |
903 |
> |
*/ |
904 |
> |
public void testGetWaitingThreads() { |
905 |
> |
final Mutex sync = new Mutex(); |
906 |
> |
final ConditionObject c = sync.newCondition(); |
907 |
> |
final BooleanLatch acquired1 = new BooleanLatch(); |
908 |
> |
final BooleanLatch acquired2 = new BooleanLatch(); |
909 |
> |
final Thread t1 = new Thread(new CheckedRunnable() { |
910 |
> |
public void realRun() throws InterruptedException { |
911 |
> |
sync.acquire(); |
912 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
913 |
> |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
914 |
> |
assertTrue(acquired1.releaseShared(0)); |
915 |
> |
c.await(); |
916 |
> |
sync.release(); |
917 |
> |
}}); |
918 |
> |
|
919 |
> |
final Thread t2 = new Thread(new CheckedRunnable() { |
920 |
> |
public void realRun() throws InterruptedException { |
921 |
> |
sync.acquire(); |
922 |
> |
assertHasWaitersLocked(sync, c, t1); |
923 |
> |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
924 |
> |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
925 |
> |
assertEquals(1, sync.getWaitingThreads(c).size()); |
926 |
> |
assertTrue(acquired2.releaseShared(0)); |
927 |
> |
c.await(); |
928 |
> |
sync.release(); |
929 |
> |
}}); |
930 |
> |
|
931 |
> |
sync.acquire(); |
932 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
933 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t1)); |
934 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
935 |
> |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
936 |
> |
assertEquals(0, sync.getWaitingThreads(c).size()); |
937 |
> |
sync.release(); |
938 |
> |
|
939 |
> |
t1.start(); |
940 |
> |
acquired1.acquireShared(0); |
941 |
> |
sync.acquire(); |
942 |
> |
assertHasWaitersLocked(sync, c, t1); |
943 |
> |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
944 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
945 |
> |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
946 |
> |
assertEquals(1, sync.getWaitingThreads(c).size()); |
947 |
> |
sync.release(); |
948 |
> |
|
949 |
> |
t2.start(); |
950 |
> |
acquired2.acquireShared(0); |
951 |
> |
sync.acquire(); |
952 |
> |
assertHasWaitersLocked(sync, c, t1, t2); |
953 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
954 |
> |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
955 |
> |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
956 |
> |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
957 |
> |
assertEquals(2, sync.getWaitingThreads(c).size()); |
958 |
> |
c.signalAll(); |
959 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
960 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
961 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t1)); |
962 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
963 |
> |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
964 |
> |
assertEquals(0, sync.getWaitingThreads(c).size()); |
965 |
> |
sync.release(); |
966 |
> |
|
967 |
> |
awaitTermination(t1); |
968 |
> |
awaitTermination(t2); |
969 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
970 |
> |
} |
971 |
> |
|
972 |
> |
/** |
973 |
> |
* awaitUninterruptibly is uninterruptible |
974 |
> |
*/ |
975 |
> |
public void testAwaitUninterruptibly() { |
976 |
> |
final Mutex sync = new Mutex(); |
977 |
> |
final ConditionObject condition = sync.newCondition(); |
978 |
> |
final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
979 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
980 |
> |
public void realRun() { |
981 |
> |
sync.acquire(); |
982 |
> |
assertTrue(pleaseInterrupt.releaseShared(0)); |
983 |
> |
condition.awaitUninterruptibly(); |
984 |
> |
assertTrue(Thread.interrupted()); |
985 |
> |
assertHasWaitersLocked(sync, condition, NO_THREADS); |
986 |
> |
sync.release(); |
987 |
> |
}}); |
988 |
> |
|
989 |
> |
pleaseInterrupt.acquireShared(0); |
990 |
> |
sync.acquire(); |
991 |
> |
assertHasWaitersLocked(sync, condition, t); |
992 |
> |
sync.release(); |
993 |
> |
t.interrupt(); |
994 |
> |
assertHasWaitersUnlocked(sync, condition, t); |
995 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
996 |
> |
sync.acquire(); |
997 |
> |
assertHasWaitersLocked(sync, condition, t); |
998 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
999 |
> |
condition.signal(); |
1000 |
> |
assertHasWaitersLocked(sync, condition, NO_THREADS); |
1001 |
> |
assertHasExclusiveQueuedThreads(sync, t); |
1002 |
> |
sync.release(); |
1003 |
> |
awaitTermination(t); |
1004 |
> |
} |
1005 |
> |
|
1006 |
> |
/** |
1007 |
> |
* await/awaitNanos/awaitUntil is interruptible |
1008 |
> |
*/ |
1009 |
> |
public void testInterruptible_await() { testInterruptible(AwaitMethod.await); } |
1010 |
> |
public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); } |
1011 |
> |
public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); } |
1012 |
> |
public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); } |
1013 |
> |
public void testInterruptible(final AwaitMethod awaitMethod) { |
1014 |
> |
final Mutex sync = new Mutex(); |
1015 |
> |
final ConditionObject c = sync.newCondition(); |
1016 |
> |
final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
1017 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1018 |
> |
public void realRun() throws InterruptedException { |
1019 |
> |
sync.acquire(); |
1020 |
> |
assertTrue(pleaseInterrupt.releaseShared(0)); |
1021 |
> |
await(c, awaitMethod); |
1022 |
> |
}}); |
1023 |
> |
|
1024 |
> |
pleaseInterrupt.acquireShared(0); |
1025 |
> |
t.interrupt(); |
1026 |
> |
awaitTermination(t); |
1027 |
> |
} |
1028 |
> |
|
1029 |
> |
/** |
1030 |
> |
* signalAll wakes up all threads |
1031 |
> |
*/ |
1032 |
> |
public void testSignalAll_await() { testSignalAll(AwaitMethod.await); } |
1033 |
> |
public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); } |
1034 |
> |
public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); } |
1035 |
> |
public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); } |
1036 |
> |
public void testSignalAll(final AwaitMethod awaitMethod) { |
1037 |
> |
final Mutex sync = new Mutex(); |
1038 |
> |
final ConditionObject c = sync.newCondition(); |
1039 |
> |
final BooleanLatch acquired1 = new BooleanLatch(); |
1040 |
> |
final BooleanLatch acquired2 = new BooleanLatch(); |
1041 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1042 |
> |
public void realRun() throws InterruptedException { |
1043 |
> |
sync.acquire(); |
1044 |
> |
acquired1.releaseShared(0); |
1045 |
> |
await(c, awaitMethod); |
1046 |
> |
sync.release(); |
1047 |
> |
}}); |
1048 |
> |
|
1049 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1050 |
> |
public void realRun() throws InterruptedException { |
1051 |
> |
sync.acquire(); |
1052 |
> |
acquired2.releaseShared(0); |
1053 |
> |
await(c, awaitMethod); |
1054 |
> |
sync.release(); |
1055 |
> |
}}); |
1056 |
> |
|
1057 |
> |
acquired1.acquireShared(0); |
1058 |
> |
acquired2.acquireShared(0); |
1059 |
> |
sync.acquire(); |
1060 |
> |
assertHasWaitersLocked(sync, c, t1, t2); |
1061 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1062 |
> |
c.signalAll(); |
1063 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
1064 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
1065 |
> |
sync.release(); |
1066 |
> |
awaitTermination(t1); |
1067 |
> |
awaitTermination(t2); |
1068 |
> |
} |
1069 |
> |
|
1070 |
> |
/** |
1071 |
> |
* toString indicates current state |
1072 |
> |
*/ |
1073 |
> |
public void testToString() { |
1074 |
> |
Mutex sync = new Mutex(); |
1075 |
> |
assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED)); |
1076 |
> |
sync.acquire(); |
1077 |
> |
assertTrue(sync.toString().contains("State = " + Mutex.LOCKED)); |
1078 |
> |
} |
1079 |
> |
|
1080 |
> |
/** |
1081 |
> |
* A serialized AQS deserializes with current state, but no queued threads |
1082 |
> |
*/ |
1083 |
> |
public void testSerialization() { |
1084 |
> |
Mutex sync = new Mutex(); |
1085 |
> |
assertFalse(serialClone(sync).isHeldExclusively()); |
1086 |
> |
sync.acquire(); |
1087 |
> |
Thread t = newStartedThread(new InterruptedSyncRunnable(sync)); |
1088 |
> |
waitForQueuedThread(sync, t); |
1089 |
> |
assertTrue(sync.isHeldExclusively()); |
1090 |
> |
|
1091 |
> |
Mutex clone = serialClone(sync); |
1092 |
> |
assertTrue(clone.isHeldExclusively()); |
1093 |
> |
assertHasExclusiveQueuedThreads(sync, t); |
1094 |
> |
assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
1095 |
> |
t.interrupt(); |
1096 |
> |
awaitTermination(t); |
1097 |
> |
sync.release(); |
1098 |
> |
assertFalse(sync.isHeldExclusively()); |
1099 |
> |
assertTrue(clone.isHeldExclusively()); |
1100 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1101 |
> |
assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
1102 |
> |
} |
1103 |
> |
|
1104 |
> |
/** |
1105 |
> |
* tryReleaseShared setting state changes getState |
1106 |
> |
*/ |
1107 |
> |
public void testGetStateWithReleaseShared() { |
1108 |
> |
final BooleanLatch l = new BooleanLatch(); |
1109 |
> |
assertFalse(l.isSignalled()); |
1110 |
> |
assertTrue(l.releaseShared(0)); |
1111 |
> |
assertTrue(l.isSignalled()); |
1112 |
> |
} |
1113 |
> |
|
1114 |
> |
/** |
1115 |
> |
* releaseShared has no effect when already signalled |
1116 |
> |
*/ |
1117 |
> |
public void testReleaseShared() { |
1118 |
> |
final BooleanLatch l = new BooleanLatch(); |
1119 |
> |
assertFalse(l.isSignalled()); |
1120 |
> |
assertTrue(l.releaseShared(0)); |
1121 |
> |
assertTrue(l.isSignalled()); |
1122 |
> |
assertTrue(l.releaseShared(0)); |
1123 |
> |
assertTrue(l.isSignalled()); |
1124 |
> |
} |
1125 |
> |
|
1126 |
> |
/** |
1127 |
> |
* acquireSharedInterruptibly returns after release, but not before |
1128 |
> |
*/ |
1129 |
> |
public void testAcquireSharedInterruptibly() { |
1130 |
> |
final BooleanLatch l = new BooleanLatch(); |
1131 |
> |
|
1132 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
1133 |
> |
public void realRun() throws InterruptedException { |
1134 |
> |
assertFalse(l.isSignalled()); |
1135 |
> |
l.acquireSharedInterruptibly(0); |
1136 |
> |
assertTrue(l.isSignalled()); |
1137 |
> |
l.acquireSharedInterruptibly(0); |
1138 |
> |
assertTrue(l.isSignalled()); |
1139 |
> |
}}); |
1140 |
> |
|
1141 |
> |
waitForQueuedThread(l, t); |
1142 |
> |
assertFalse(l.isSignalled()); |
1143 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
1144 |
> |
assertHasSharedQueuedThreads(l, t); |
1145 |
> |
assertTrue(l.releaseShared(0)); |
1146 |
> |
assertTrue(l.isSignalled()); |
1147 |
> |
awaitTermination(t); |
1148 |
> |
} |
1149 |
> |
|
1150 |
> |
/** |
1151 |
> |
* tryAcquireSharedNanos returns after release, but not before |
1152 |
> |
*/ |
1153 |
> |
public void testTryAcquireSharedNanos() { |
1154 |
> |
final BooleanLatch l = new BooleanLatch(); |
1155 |
> |
|
1156 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
1157 |
> |
public void realRun() throws InterruptedException { |
1158 |
> |
assertFalse(l.isSignalled()); |
1159 |
> |
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1160 |
> |
assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
1161 |
> |
assertTrue(l.isSignalled()); |
1162 |
> |
assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
1163 |
> |
assertTrue(l.isSignalled()); |
1164 |
> |
}}); |
1165 |
> |
|
1166 |
> |
waitForQueuedThread(l, t); |
1167 |
> |
assertFalse(l.isSignalled()); |
1168 |
> |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
1169 |
> |
assertTrue(l.releaseShared(0)); |
1170 |
> |
assertTrue(l.isSignalled()); |
1171 |
> |
awaitTermination(t); |
1172 |
> |
} |
1173 |
> |
|
1174 |
> |
/** |
1175 |
> |
* acquireSharedInterruptibly is interruptible |
1176 |
> |
*/ |
1177 |
> |
public void testAcquireSharedInterruptibly_Interruptible() { |
1178 |
> |
final BooleanLatch l = new BooleanLatch(); |
1179 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1180 |
> |
public void realRun() throws InterruptedException { |
1181 |
> |
assertFalse(l.isSignalled()); |
1182 |
> |
l.acquireSharedInterruptibly(0); |
1183 |
> |
}}); |
1184 |
> |
|
1185 |
> |
waitForQueuedThread(l, t); |
1186 |
> |
assertFalse(l.isSignalled()); |
1187 |
> |
t.interrupt(); |
1188 |
> |
awaitTermination(t); |
1189 |
> |
assertFalse(l.isSignalled()); |
1190 |
> |
} |
1191 |
> |
|
1192 |
> |
/** |
1193 |
> |
* tryAcquireSharedNanos is interruptible |
1194 |
> |
*/ |
1195 |
> |
public void testTryAcquireSharedNanos_Interruptible() { |
1196 |
> |
final BooleanLatch l = new BooleanLatch(); |
1197 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1198 |
> |
public void realRun() throws InterruptedException { |
1199 |
> |
assertFalse(l.isSignalled()); |
1200 |
> |
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1201 |
> |
l.tryAcquireSharedNanos(0, nanos); |
1202 |
> |
}}); |
1203 |
> |
|
1204 |
> |
waitForQueuedThread(l, t); |
1205 |
> |
assertFalse(l.isSignalled()); |
1206 |
> |
t.interrupt(); |
1207 |
> |
awaitTermination(t); |
1208 |
> |
assertFalse(l.isSignalled()); |
1209 |
> |
} |
1210 |
> |
|
1211 |
> |
/** |
1212 |
> |
* tryAcquireSharedNanos times out if not released before timeout |
1213 |
> |
*/ |
1214 |
> |
public void testTryAcquireSharedNanos_Timeout() { |
1215 |
> |
final BooleanLatch l = new BooleanLatch(); |
1216 |
> |
final BooleanLatch observedQueued = new BooleanLatch(); |
1217 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
1218 |
> |
public void realRun() throws InterruptedException { |
1219 |
> |
assertFalse(l.isSignalled()); |
1220 |
> |
for (long millis = timeoutMillis(); |
1221 |
> |
!observedQueued.isSignalled(); |
1222 |
> |
millis *= 2) { |
1223 |
> |
long nanos = MILLISECONDS.toNanos(millis); |
1224 |
> |
long startTime = System.nanoTime(); |
1225 |
> |
assertFalse(l.tryAcquireSharedNanos(0, nanos)); |
1226 |
> |
assertTrue(millisElapsedSince(startTime) >= millis); |
1227 |
> |
} |
1228 |
> |
assertFalse(l.isSignalled()); |
1229 |
> |
}}); |
1230 |
> |
|
1231 |
> |
waitForQueuedThread(l, t); |
1232 |
> |
observedQueued.releaseShared(0); |
1233 |
> |
assertFalse(l.isSignalled()); |
1234 |
> |
awaitTermination(t); |
1235 |
> |
assertFalse(l.isSignalled()); |
1236 |
> |
} |
1237 |
> |
|
1238 |
> |
/** |
1239 |
> |
* awaitNanos/timed await with 0 wait times out immediately |
1240 |
> |
*/ |
1241 |
> |
public void testAwait_Zero() throws InterruptedException { |
1242 |
> |
final Mutex sync = new Mutex(); |
1243 |
> |
final ConditionObject c = sync.newCondition(); |
1244 |
> |
sync.acquire(); |
1245 |
> |
assertTrue(c.awaitNanos(0L) <= 0); |
1246 |
> |
assertFalse(c.await(0L, NANOSECONDS)); |
1247 |
> |
sync.release(); |
1248 |
> |
} |
1249 |
> |
|
1250 |
> |
/** |
1251 |
> |
* awaitNanos/timed await with maximum negative wait times does not underflow |
1252 |
> |
*/ |
1253 |
> |
public void testAwait_NegativeInfinity() throws InterruptedException { |
1254 |
> |
final Mutex sync = new Mutex(); |
1255 |
> |
final ConditionObject c = sync.newCondition(); |
1256 |
> |
sync.acquire(); |
1257 |
> |
assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0); |
1258 |
> |
assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS)); |
1259 |
> |
sync.release(); |
1260 |
> |
} |
1261 |
> |
|
1262 |
> |
/** |
1263 |
> |
* JDK-8191483: AbstractQueuedSynchronizer cancel/cancel race |
1264 |
> |
* ant -Djsr166.tckTestClass=AbstractQueuedSynchronizerTest -Djsr166.methodFilter=testCancelCancelRace -Djsr166.runsPerTest=100 tck |
1265 |
> |
*/ |
1266 |
> |
public void testCancelCancelRace() throws InterruptedException { |
1267 |
> |
class Sync extends AbstractQueuedSynchronizer { |
1268 |
> |
protected boolean tryAcquire(int acquires) { |
1269 |
> |
return !hasQueuedPredecessors() && compareAndSetState(0, 1); |
1270 |
> |
} |
1271 |
> |
protected boolean tryRelease(int releases) { |
1272 |
> |
return compareAndSetState(1, 0); |
1273 |
> |
} |
1274 |
|
} |
1275 |
< |
catch (Exception ex) { |
1276 |
< |
unexpectedException(); |
1275 |
> |
|
1276 |
> |
Sync s = new Sync(); |
1277 |
> |
s.acquire(1); // acquire to force other threads to enqueue |
1278 |
> |
|
1279 |
> |
// try to trigger double cancel race with two background threads |
1280 |
> |
ArrayList<Thread> threads = new ArrayList<>(); |
1281 |
> |
Runnable failedAcquire = () -> { |
1282 |
> |
try { |
1283 |
> |
s.acquireInterruptibly(1); |
1284 |
> |
shouldThrow(); |
1285 |
> |
} catch (InterruptedException success) {} |
1286 |
> |
}; |
1287 |
> |
for (int i = 0; i < 2; i++) { |
1288 |
> |
Thread thread = new Thread(failedAcquire); |
1289 |
> |
thread.start(); |
1290 |
> |
threads.add(thread); |
1291 |
> |
} |
1292 |
> |
Thread.sleep(100); |
1293 |
> |
for (Thread thread : threads) thread.interrupt(); |
1294 |
> |
for (Thread thread : threads) awaitTermination(thread); |
1295 |
> |
|
1296 |
> |
s.release(1); |
1297 |
> |
|
1298 |
> |
// no one holds lock now, we should be able to acquire |
1299 |
> |
if (!s.tryAcquire(1)) |
1300 |
> |
throw new RuntimeException( |
1301 |
> |
String.format( |
1302 |
> |
"Broken: hasQueuedPredecessors=%s hasQueuedThreads=%s queueLength=%d firstQueuedThread=%s", |
1303 |
> |
s.hasQueuedPredecessors(), |
1304 |
> |
s.hasQueuedThreads(), |
1305 |
> |
s.getQueueLength(), |
1306 |
> |
s.getFirstQueuedThread())); |
1307 |
> |
} |
1308 |
> |
|
1309 |
> |
/** |
1310 |
> |
* Tests scenario for |
1311 |
> |
* JDK-8191937: Lost interrupt in AbstractQueuedSynchronizer when tryAcquire methods throw |
1312 |
> |
* ant -Djsr166.tckTestClass=AbstractQueuedSynchronizerTest -Djsr166.methodFilter=testInterruptedFailingAcquire -Djsr166.runsPerTest=10000 tck |
1313 |
> |
*/ |
1314 |
> |
public void testInterruptedFailingAcquire() throws Throwable { |
1315 |
> |
class PleaseThrow extends RuntimeException {} |
1316 |
> |
final PleaseThrow ex = new PleaseThrow(); |
1317 |
> |
|
1318 |
> |
// A synchronizer only offering a choice of failure modes |
1319 |
> |
class Sync extends AbstractQueuedSynchronizer { |
1320 |
> |
volatile boolean pleaseThrow; |
1321 |
> |
@Override protected boolean tryAcquire(int ignored) { |
1322 |
> |
if (pleaseThrow) throw ex; |
1323 |
> |
return false; |
1324 |
> |
} |
1325 |
> |
@Override protected int tryAcquireShared(int ignored) { |
1326 |
> |
if (pleaseThrow) throw ex; |
1327 |
> |
return -1; |
1328 |
> |
} |
1329 |
> |
@Override protected boolean tryRelease(int ignored) { |
1330 |
> |
return true; |
1331 |
> |
} |
1332 |
> |
@Override protected boolean tryReleaseShared(int ignored) { |
1333 |
> |
return true; |
1334 |
> |
} |
1335 |
|
} |
1336 |
+ |
|
1337 |
+ |
final Sync s = new Sync(); |
1338 |
+ |
final boolean acquireInterruptibly = randomBoolean(); |
1339 |
+ |
final Action[] uninterruptibleAcquireActions = { |
1340 |
+ |
() -> s.acquire(1), |
1341 |
+ |
() -> s.acquireShared(1), |
1342 |
+ |
}; |
1343 |
+ |
final long nanosTimeout = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1344 |
+ |
final Action[] interruptibleAcquireActions = { |
1345 |
+ |
() -> s.acquireInterruptibly(1), |
1346 |
+ |
() -> s.acquireSharedInterruptibly(1), |
1347 |
+ |
() -> s.tryAcquireNanos(1, nanosTimeout), |
1348 |
+ |
() -> s.tryAcquireSharedNanos(1, nanosTimeout), |
1349 |
+ |
}; |
1350 |
+ |
final Action[] releaseActions = { |
1351 |
+ |
() -> s.release(1), |
1352 |
+ |
() -> s.releaseShared(1), |
1353 |
+ |
}; |
1354 |
+ |
final Action acquireAction = acquireInterruptibly |
1355 |
+ |
? chooseRandomly(interruptibleAcquireActions) |
1356 |
+ |
: chooseRandomly(uninterruptibleAcquireActions); |
1357 |
+ |
final Action releaseAction |
1358 |
+ |
= chooseRandomly(releaseActions); |
1359 |
+ |
|
1360 |
+ |
// From os_posix.cpp: |
1361 |
+ |
// |
1362 |
+ |
// NOTE that since there is no "lock" around the interrupt and |
1363 |
+ |
// is_interrupted operations, there is the possibility that the |
1364 |
+ |
// interrupted flag (in osThread) will be "false" but that the |
1365 |
+ |
// low-level events will be in the signaled state. This is |
1366 |
+ |
// intentional. The effect of this is that Object.wait() and |
1367 |
+ |
// LockSupport.park() will appear to have a spurious wakeup, which |
1368 |
+ |
// is allowed and not harmful, and the possibility is so rare that |
1369 |
+ |
// it is not worth the added complexity to add yet another lock. |
1370 |
+ |
final Thread thread = newStartedThread(new CheckedRunnable() { |
1371 |
+ |
public void realRun() throws Throwable { |
1372 |
+ |
try { |
1373 |
+ |
acquireAction.run(); |
1374 |
+ |
shouldThrow(); |
1375 |
+ |
} catch (InterruptedException possible) { |
1376 |
+ |
assertTrue(acquireInterruptibly); |
1377 |
+ |
assertFalse(Thread.interrupted()); |
1378 |
+ |
} catch (PleaseThrow possible) { |
1379 |
+ |
awaitInterrupted(); |
1380 |
+ |
} |
1381 |
+ |
}}); |
1382 |
+ |
for (long startTime = 0L;; ) { |
1383 |
+ |
waitForThreadToEnterWaitState(thread); |
1384 |
+ |
if (s.getFirstQueuedThread() == thread |
1385 |
+ |
&& s.hasQueuedPredecessors() |
1386 |
+ |
&& s.hasQueuedThreads() |
1387 |
+ |
&& s.getQueueLength() == 1 |
1388 |
+ |
&& s.hasContended()) |
1389 |
+ |
break; |
1390 |
+ |
if (startTime == 0L) |
1391 |
+ |
startTime = System.nanoTime(); |
1392 |
+ |
else if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
1393 |
+ |
fail("timed out waiting for AQS state: " |
1394 |
+ |
+ "thread state=" + thread.getState() |
1395 |
+ |
+ ", queued threads=" + s.getQueuedThreads()); |
1396 |
+ |
Thread.yield(); |
1397 |
+ |
} |
1398 |
+ |
|
1399 |
+ |
s.pleaseThrow = true; |
1400 |
+ |
// release and interrupt, in random order |
1401 |
+ |
if (randomBoolean()) { |
1402 |
+ |
thread.interrupt(); |
1403 |
+ |
releaseAction.run(); |
1404 |
+ |
} else { |
1405 |
+ |
releaseAction.run(); |
1406 |
+ |
thread.interrupt(); |
1407 |
+ |
} |
1408 |
+ |
awaitTermination(thread); |
1409 |
+ |
|
1410 |
+ |
assertNull(s.getFirstQueuedThread()); |
1411 |
+ |
assertFalse(s.hasQueuedPredecessors()); |
1412 |
+ |
assertFalse(s.hasQueuedThreads()); |
1413 |
+ |
assertEquals(0, s.getQueueLength()); |
1414 |
+ |
assertTrue(s.getQueuedThreads().isEmpty()); |
1415 |
+ |
assertTrue(s.hasContended()); |
1416 |
|
} |
1417 |
< |
|
1417 |
> |
|
1418 |
|
} |