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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.ThreadLocalRandom; |
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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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@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, Thread current) { |
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assert acquires == 1; // Does not use multiple acquires |
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return state().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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state().set(0); |
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return true; |
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} |
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|
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public int acquireSharedState(boolean isQueued, int acquires, Thread current) { |
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throw new UnsupportedOperationException(); |
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} |
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|
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public boolean releaseSharedState(int releases) { |
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throw new UnsupportedOperationException(); |
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} |
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|
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public void checkConditionAccess(Thread thread, boolean waiting) { |
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if (state().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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state().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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private final Sync sync = new Sync(); |
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public void lock() { sync.acquireExclusiveUninterruptibly(1); } |
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public boolean tryLock() { |
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return sync.acquireExclusiveState(false, 1, null) >= 0; |
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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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public void lockInterruptibly() throws InterruptedException { |
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sync.acquireExclusiveInterruptibly(1); |
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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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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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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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|
84 |
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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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/** 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.state().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; |
103 |
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InterruptibleLockRunnable(Mutex l) { lock = l; } |
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public void run() { |
105 |
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try { |
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lock.lockInterruptibly(); |
107 |
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} catch(InterruptedException success){} |
101 |
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static class BooleanLatch extends AbstractQueuedSynchronizer { |
102 |
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public boolean isSignalled() { return getState() != 0; } |
103 |
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|
104 |
> |
public int tryAcquireShared(int ignore) { |
105 |
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return isSignalled() ? 1 : -1; |
106 |
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} |
107 |
> |
|
108 |
> |
public boolean tryReleaseShared(int ignore) { |
109 |
> |
setState(1); |
110 |
> |
return true; |
111 |
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} |
112 |
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} |
113 |
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|
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+ |
/** |
115 |
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* A runnable calling acquireInterruptibly that does not expect to |
116 |
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* be interrupted. |
117 |
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*/ |
118 |
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class InterruptibleSyncRunnable extends CheckedRunnable { |
119 |
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final Mutex sync; |
120 |
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InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; } |
121 |
+ |
public void realRun() throws InterruptedException { |
122 |
+ |
sync.acquireInterruptibly(); |
123 |
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} |
124 |
+ |
} |
125 |
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|
126 |
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/** |
127 |
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* A runnable calling lockInterruptibly that expects to be |
128 |
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* interrupted |
127 |
> |
* A runnable calling acquireInterruptibly that expects to be |
128 |
> |
* interrupted. |
129 |
|
*/ |
130 |
< |
class InterruptedLockRunnable implements Runnable { |
131 |
< |
final Mutex lock; |
132 |
< |
InterruptedLockRunnable(Mutex l) { lock = l; } |
133 |
< |
public void run() { |
134 |
< |
try { |
103 |
< |
lock.lockInterruptibly(); |
104 |
< |
threadShouldThrow(); |
105 |
< |
} catch(InterruptedException success){} |
130 |
> |
class InterruptedSyncRunnable extends CheckedInterruptedRunnable { |
131 |
> |
final Mutex sync; |
132 |
> |
InterruptedSyncRunnable(Mutex sync) { this.sync = sync; } |
133 |
> |
public void realRun() throws InterruptedException { |
134 |
> |
sync.acquireInterruptibly(); |
135 |
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} |
136 |
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} |
137 |
< |
|
137 |
> |
|
138 |
> |
/** A constant to clarify calls to checking methods below. */ |
139 |
> |
static final Thread[] NO_THREADS = new Thread[0]; |
140 |
> |
|
141 |
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/** |
142 |
< |
* locking an unlocked lock succeeds |
142 |
> |
* Spin-waits until sync.isQueued(t) becomes true. |
143 |
|
*/ |
144 |
< |
public void testLock() { |
145 |
< |
Mutex rl = new Mutex(); |
146 |
< |
rl.lock(); |
147 |
< |
assertTrue(rl.isLocked()); |
148 |
< |
rl.unlock(); |
144 |
> |
void waitForQueuedThread(AbstractQueuedSynchronizer sync, Thread t) { |
145 |
> |
long startTime = System.nanoTime(); |
146 |
> |
while (!sync.isQueued(t)) { |
147 |
> |
if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
148 |
> |
throw new AssertionFailedError("timed out"); |
149 |
> |
Thread.yield(); |
150 |
> |
} |
151 |
> |
assertTrue(t.isAlive()); |
152 |
|
} |
153 |
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|
154 |
|
/** |
155 |
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* trylock on an unlocked lock succeeds |
155 |
> |
* Checks that sync has exactly the given queued threads. |
156 |
|
*/ |
157 |
< |
public void testTryLock() { |
158 |
< |
Mutex rl = new Mutex(); |
159 |
< |
assertTrue(rl.tryLock()); |
160 |
< |
assertTrue(rl.isLocked()); |
161 |
< |
rl.unlock(); |
157 |
> |
void assertHasQueuedThreads(AbstractQueuedSynchronizer sync, |
158 |
> |
Thread... expected) { |
159 |
> |
Collection<Thread> actual = sync.getQueuedThreads(); |
160 |
> |
assertEquals(expected.length > 0, sync.hasQueuedThreads()); |
161 |
> |
assertEquals(expected.length, sync.getQueueLength()); |
162 |
> |
assertEquals(expected.length, actual.size()); |
163 |
> |
assertEquals(expected.length == 0, actual.isEmpty()); |
164 |
> |
assertEquals(new HashSet<Thread>(actual), |
165 |
> |
new HashSet<Thread>(Arrays.asList(expected))); |
166 |
|
} |
167 |
|
|
168 |
|
/** |
169 |
< |
* hasQueuedThreads reports whether there are waiting threads |
169 |
> |
* Checks that sync has exactly the given (exclusive) queued threads. |
170 |
|
*/ |
171 |
< |
public void testhasQueuedThreads() { |
172 |
< |
final Mutex lock = new Mutex(); |
173 |
< |
Thread t1 = new Thread(new InterruptedLockRunnable(lock)); |
174 |
< |
Thread t2 = new Thread(new InterruptibleLockRunnable(lock)); |
175 |
< |
try { |
176 |
< |
assertFalse(lock.hasQueuedThreads()); |
177 |
< |
lock.lock(); |
178 |
< |
t1.start(); |
179 |
< |
Thread.sleep(SHORT_DELAY_MS); |
180 |
< |
assertTrue(lock.hasQueuedThreads()); |
181 |
< |
t2.start(); |
182 |
< |
Thread.sleep(SHORT_DELAY_MS); |
183 |
< |
assertTrue(lock.hasQueuedThreads()); |
184 |
< |
t1.interrupt(); |
185 |
< |
Thread.sleep(SHORT_DELAY_MS); |
186 |
< |
assertTrue(lock.hasQueuedThreads()); |
187 |
< |
lock.unlock(); |
188 |
< |
Thread.sleep(SHORT_DELAY_MS); |
189 |
< |
assertFalse(lock.hasQueuedThreads()); |
190 |
< |
t1.join(); |
191 |
< |
t2.join(); |
192 |
< |
} catch(Exception e){ |
193 |
< |
unexpectedException(); |
194 |
< |
} |
195 |
< |
} |
196 |
< |
|
197 |
< |
/** |
198 |
< |
* timed trylock is interruptible. |
199 |
< |
*/ |
200 |
< |
public void testInterruptedException2() { |
162 |
< |
final Mutex lock = new Mutex(); |
163 |
< |
lock.lock(); |
164 |
< |
Thread t = new Thread(new Runnable() { |
165 |
< |
public void run() { |
166 |
< |
try { |
167 |
< |
lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS); |
168 |
< |
threadShouldThrow(); |
169 |
< |
} catch(InterruptedException success){} |
170 |
< |
} |
171 |
< |
}); |
172 |
< |
try { |
173 |
< |
t.start(); |
174 |
< |
t.interrupt(); |
175 |
< |
} catch(Exception e){ |
176 |
< |
unexpectedException(); |
177 |
< |
} |
171 |
> |
void assertHasExclusiveQueuedThreads(AbstractQueuedSynchronizer sync, |
172 |
> |
Thread... expected) { |
173 |
> |
assertHasQueuedThreads(sync, expected); |
174 |
> |
assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()), |
175 |
> |
new HashSet<Thread>(sync.getQueuedThreads())); |
176 |
> |
assertEquals(0, sync.getSharedQueuedThreads().size()); |
177 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
178 |
> |
} |
179 |
> |
|
180 |
> |
/** |
181 |
> |
* Checks that sync has exactly the given (shared) queued threads. |
182 |
> |
*/ |
183 |
> |
void assertHasSharedQueuedThreads(AbstractQueuedSynchronizer sync, |
184 |
> |
Thread... expected) { |
185 |
> |
assertHasQueuedThreads(sync, expected); |
186 |
> |
assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()), |
187 |
> |
new HashSet<Thread>(sync.getQueuedThreads())); |
188 |
> |
assertEquals(0, sync.getExclusiveQueuedThreads().size()); |
189 |
> |
assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
190 |
> |
} |
191 |
> |
|
192 |
> |
/** |
193 |
> |
* Checks that condition c has exactly the given waiter threads, |
194 |
> |
* after acquiring mutex. |
195 |
> |
*/ |
196 |
> |
void assertHasWaitersUnlocked(Mutex sync, ConditionObject c, |
197 |
> |
Thread... threads) { |
198 |
> |
sync.acquire(); |
199 |
> |
assertHasWaitersLocked(sync, c, threads); |
200 |
> |
sync.release(); |
201 |
|
} |
202 |
|
|
203 |
+ |
/** |
204 |
+ |
* Checks that condition c has exactly the given waiter threads. |
205 |
+ |
*/ |
206 |
+ |
void assertHasWaitersLocked(Mutex sync, ConditionObject c, |
207 |
+ |
Thread... threads) { |
208 |
+ |
assertEquals(threads.length > 0, sync.hasWaiters(c)); |
209 |
+ |
assertEquals(threads.length, sync.getWaitQueueLength(c)); |
210 |
+ |
assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty()); |
211 |
+ |
assertEquals(threads.length, sync.getWaitingThreads(c).size()); |
212 |
+ |
assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)), |
213 |
+ |
new HashSet<Thread>(Arrays.asList(threads))); |
214 |
+ |
} |
215 |
+ |
|
216 |
+ |
enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil } |
217 |
|
|
218 |
|
/** |
219 |
< |
* Trylock on a locked lock fails |
220 |
< |
*/ |
221 |
< |
public void testTryLockWhenLocked() { |
222 |
< |
final Mutex lock = new Mutex(); |
223 |
< |
lock.lock(); |
224 |
< |
Thread t = new Thread(new Runnable() { |
225 |
< |
public void run() { |
226 |
< |
threadAssertFalse(lock.tryLock()); |
227 |
< |
} |
228 |
< |
}); |
229 |
< |
try { |
230 |
< |
t.start(); |
231 |
< |
t.join(); |
232 |
< |
lock.unlock(); |
233 |
< |
} catch(Exception e){ |
234 |
< |
unexpectedException(); |
235 |
< |
} |
236 |
< |
} |
237 |
< |
|
238 |
< |
/** |
239 |
< |
* Timed trylock on a locked lock times out |
240 |
< |
*/ |
204 |
< |
public void testTryLock_Timeout() { |
205 |
< |
final Mutex lock = new Mutex(); |
206 |
< |
lock.lock(); |
207 |
< |
Thread t = new Thread(new Runnable() { |
208 |
< |
public void run() { |
209 |
< |
try { |
210 |
< |
threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS)); |
211 |
< |
} catch (Exception ex) { |
212 |
< |
threadUnexpectedException(); |
213 |
< |
} |
214 |
< |
} |
215 |
< |
}); |
216 |
< |
try { |
217 |
< |
t.start(); |
218 |
< |
t.join(); |
219 |
< |
lock.unlock(); |
220 |
< |
} catch(Exception e){ |
221 |
< |
unexpectedException(); |
222 |
< |
} |
223 |
< |
} |
224 |
< |
|
225 |
< |
|
226 |
< |
/** |
227 |
< |
* isLocked is true when locked and false when not |
228 |
< |
*/ |
229 |
< |
public void testIsLocked() { |
230 |
< |
final Mutex lock = new Mutex(); |
231 |
< |
lock.lock(); |
232 |
< |
assertTrue(lock.isLocked()); |
233 |
< |
lock.unlock(); |
234 |
< |
assertFalse(lock.isLocked()); |
235 |
< |
Thread t = new Thread(new Runnable() { |
236 |
< |
public void run() { |
237 |
< |
lock.lock(); |
238 |
< |
try { |
239 |
< |
Thread.sleep(SMALL_DELAY_MS); |
240 |
< |
} |
241 |
< |
catch(Exception e) { |
242 |
< |
threadUnexpectedException(); |
243 |
< |
} |
244 |
< |
lock.unlock(); |
245 |
< |
} |
246 |
< |
}); |
247 |
< |
try { |
248 |
< |
t.start(); |
249 |
< |
Thread.sleep(SHORT_DELAY_MS); |
250 |
< |
assertTrue(lock.isLocked()); |
251 |
< |
t.join(); |
252 |
< |
assertFalse(lock.isLocked()); |
253 |
< |
} catch(Exception e){ |
254 |
< |
unexpectedException(); |
219 |
> |
* Awaits condition using the specified AwaitMethod. |
220 |
> |
*/ |
221 |
> |
void await(ConditionObject c, AwaitMethod awaitMethod) |
222 |
> |
throws InterruptedException { |
223 |
> |
long timeoutMillis = 2 * LONG_DELAY_MS; |
224 |
> |
switch (awaitMethod) { |
225 |
> |
case await: |
226 |
> |
c.await(); |
227 |
> |
break; |
228 |
> |
case awaitTimed: |
229 |
> |
assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
230 |
> |
break; |
231 |
> |
case awaitNanos: |
232 |
> |
long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
233 |
> |
long nanosRemaining = c.awaitNanos(nanosTimeout); |
234 |
> |
assertTrue(nanosRemaining > 0); |
235 |
> |
break; |
236 |
> |
case awaitUntil: |
237 |
> |
assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
238 |
> |
break; |
239 |
> |
default: |
240 |
> |
throw new AssertionError(); |
241 |
|
} |
242 |
|
} |
243 |
|
|
244 |
+ |
/** |
245 |
+ |
* Checks that awaiting the given condition times out (using the |
246 |
+ |
* default timeout duration). |
247 |
+ |
*/ |
248 |
+ |
void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) { |
249 |
+ |
final long timeoutMillis = timeoutMillis(); |
250 |
+ |
final long startTime; |
251 |
+ |
try { |
252 |
+ |
switch (awaitMethod) { |
253 |
+ |
case awaitTimed: |
254 |
+ |
startTime = System.nanoTime(); |
255 |
+ |
assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
256 |
+ |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
257 |
+ |
break; |
258 |
+ |
case awaitNanos: |
259 |
+ |
startTime = System.nanoTime(); |
260 |
+ |
long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
261 |
+ |
long nanosRemaining = c.awaitNanos(nanosTimeout); |
262 |
+ |
assertTrue(nanosRemaining <= 0); |
263 |
+ |
assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS)); |
264 |
+ |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
265 |
+ |
break; |
266 |
+ |
case awaitUntil: |
267 |
+ |
// We shouldn't assume that nanoTime and currentTimeMillis |
268 |
+ |
// use the same time source, so don't use nanoTime here. |
269 |
+ |
java.util.Date delayedDate = delayedDate(timeoutMillis); |
270 |
+ |
assertFalse(c.awaitUntil(delayedDate(timeoutMillis))); |
271 |
+ |
assertTrue(new java.util.Date().getTime() >= delayedDate.getTime()); |
272 |
+ |
break; |
273 |
+ |
default: |
274 |
+ |
throw new UnsupportedOperationException(); |
275 |
+ |
} |
276 |
+ |
} catch (InterruptedException ie) { threadUnexpectedException(ie); } |
277 |
+ |
} |
278 |
+ |
|
279 |
+ |
/** |
280 |
+ |
* isHeldExclusively is false upon construction |
281 |
+ |
*/ |
282 |
+ |
public void testIsHeldExclusively() { |
283 |
+ |
Mutex sync = new Mutex(); |
284 |
+ |
assertFalse(sync.isHeldExclusively()); |
285 |
+ |
} |
286 |
+ |
|
287 |
+ |
/** |
288 |
+ |
* acquiring released sync succeeds |
289 |
+ |
*/ |
290 |
+ |
public void testAcquire() { |
291 |
+ |
Mutex sync = new Mutex(); |
292 |
+ |
sync.acquire(); |
293 |
+ |
assertTrue(sync.isHeldExclusively()); |
294 |
+ |
sync.release(); |
295 |
+ |
assertFalse(sync.isHeldExclusively()); |
296 |
+ |
} |
297 |
+ |
|
298 |
+ |
/** |
299 |
+ |
* tryAcquire on a released sync succeeds |
300 |
+ |
*/ |
301 |
+ |
public void testTryAcquire() { |
302 |
+ |
Mutex sync = new Mutex(); |
303 |
+ |
assertTrue(sync.tryAcquire()); |
304 |
+ |
assertTrue(sync.isHeldExclusively()); |
305 |
+ |
sync.release(); |
306 |
+ |
assertFalse(sync.isHeldExclusively()); |
307 |
+ |
} |
308 |
+ |
|
309 |
+ |
/** |
310 |
+ |
* hasQueuedThreads reports whether there are waiting threads |
311 |
+ |
*/ |
312 |
+ |
public void testHasQueuedThreads() { |
313 |
+ |
final Mutex sync = new Mutex(); |
314 |
+ |
assertFalse(sync.hasQueuedThreads()); |
315 |
+ |
sync.acquire(); |
316 |
+ |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
317 |
+ |
waitForQueuedThread(sync, t1); |
318 |
+ |
assertTrue(sync.hasQueuedThreads()); |
319 |
+ |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
320 |
+ |
waitForQueuedThread(sync, t2); |
321 |
+ |
assertTrue(sync.hasQueuedThreads()); |
322 |
+ |
t1.interrupt(); |
323 |
+ |
awaitTermination(t1); |
324 |
+ |
assertTrue(sync.hasQueuedThreads()); |
325 |
+ |
sync.release(); |
326 |
+ |
awaitTermination(t2); |
327 |
+ |
assertFalse(sync.hasQueuedThreads()); |
328 |
+ |
} |
329 |
|
|
330 |
|
/** |
331 |
< |
* lockInterruptibly is interruptible. |
332 |
< |
*/ |
333 |
< |
public void testLockInterruptibly1() { |
334 |
< |
final Mutex lock = new Mutex(); |
264 |
< |
lock.lock(); |
265 |
< |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
266 |
< |
try { |
267 |
< |
t.start(); |
268 |
< |
t.interrupt(); |
269 |
< |
lock.unlock(); |
270 |
< |
t.join(); |
271 |
< |
} catch(Exception e){ |
272 |
< |
unexpectedException(); |
273 |
< |
} |
274 |
< |
} |
275 |
< |
|
276 |
< |
/** |
277 |
< |
* lockInterruptibly succeeds when unlocked, else is interruptible |
278 |
< |
*/ |
279 |
< |
public void testLockInterruptibly2() { |
280 |
< |
final Mutex lock = new Mutex(); |
281 |
< |
try { |
282 |
< |
lock.lockInterruptibly(); |
283 |
< |
} catch(Exception e) { |
284 |
< |
unexpectedException(); |
285 |
< |
} |
286 |
< |
Thread t = new Thread(new InterruptedLockRunnable(lock)); |
287 |
< |
try { |
288 |
< |
t.start(); |
289 |
< |
t.interrupt(); |
290 |
< |
assertTrue(lock.isLocked()); |
291 |
< |
t.join(); |
292 |
< |
} catch(Exception e){ |
293 |
< |
unexpectedException(); |
294 |
< |
} |
295 |
< |
} |
296 |
< |
|
297 |
< |
/** |
298 |
< |
* Calling await without holding lock throws IllegalMonitorStateException |
299 |
< |
*/ |
300 |
< |
public void testAwait_IllegalMonitor() { |
301 |
< |
final Mutex lock = new Mutex(); |
302 |
< |
final Condition c = lock.newCondition(); |
331 |
> |
* isQueued(null) throws NullPointerException |
332 |
> |
*/ |
333 |
> |
public void testIsQueuedNPE() { |
334 |
> |
final Mutex sync = new Mutex(); |
335 |
|
try { |
336 |
< |
c.await(); |
336 |
> |
sync.isQueued(null); |
337 |
|
shouldThrow(); |
338 |
< |
} |
339 |
< |
catch (IllegalMonitorStateException success) { |
340 |
< |
} |
341 |
< |
catch (Exception ex) { |
342 |
< |
unexpectedException(); |
338 |
> |
} catch (NullPointerException success) {} |
339 |
> |
} |
340 |
> |
|
341 |
> |
/** |
342 |
> |
* isQueued reports whether a thread is queued |
343 |
> |
*/ |
344 |
> |
public void testIsQueued() { |
345 |
> |
final Mutex sync = new Mutex(); |
346 |
> |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
347 |
> |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
348 |
> |
assertFalse(sync.isQueued(t1)); |
349 |
> |
assertFalse(sync.isQueued(t2)); |
350 |
> |
sync.acquire(); |
351 |
> |
t1.start(); |
352 |
> |
waitForQueuedThread(sync, t1); |
353 |
> |
assertTrue(sync.isQueued(t1)); |
354 |
> |
assertFalse(sync.isQueued(t2)); |
355 |
> |
t2.start(); |
356 |
> |
waitForQueuedThread(sync, t2); |
357 |
> |
assertTrue(sync.isQueued(t1)); |
358 |
> |
assertTrue(sync.isQueued(t2)); |
359 |
> |
t1.interrupt(); |
360 |
> |
awaitTermination(t1); |
361 |
> |
assertFalse(sync.isQueued(t1)); |
362 |
> |
assertTrue(sync.isQueued(t2)); |
363 |
> |
sync.release(); |
364 |
> |
awaitTermination(t2); |
365 |
> |
assertFalse(sync.isQueued(t1)); |
366 |
> |
assertFalse(sync.isQueued(t2)); |
367 |
> |
} |
368 |
> |
|
369 |
> |
/** |
370 |
> |
* getFirstQueuedThread returns first waiting thread or null if none |
371 |
> |
*/ |
372 |
> |
public void testGetFirstQueuedThread() { |
373 |
> |
final Mutex sync = new Mutex(); |
374 |
> |
assertNull(sync.getFirstQueuedThread()); |
375 |
> |
sync.acquire(); |
376 |
> |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
377 |
> |
waitForQueuedThread(sync, t1); |
378 |
> |
assertEquals(t1, sync.getFirstQueuedThread()); |
379 |
> |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
380 |
> |
waitForQueuedThread(sync, t2); |
381 |
> |
assertEquals(t1, sync.getFirstQueuedThread()); |
382 |
> |
t1.interrupt(); |
383 |
> |
awaitTermination(t1); |
384 |
> |
assertEquals(t2, sync.getFirstQueuedThread()); |
385 |
> |
sync.release(); |
386 |
> |
awaitTermination(t2); |
387 |
> |
assertNull(sync.getFirstQueuedThread()); |
388 |
> |
} |
389 |
> |
|
390 |
> |
/** |
391 |
> |
* hasContended reports false if no thread has ever blocked, else true |
392 |
> |
*/ |
393 |
> |
public void testHasContended() { |
394 |
> |
final Mutex sync = new Mutex(); |
395 |
> |
assertFalse(sync.hasContended()); |
396 |
> |
sync.acquire(); |
397 |
> |
assertFalse(sync.hasContended()); |
398 |
> |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
399 |
> |
waitForQueuedThread(sync, t1); |
400 |
> |
assertTrue(sync.hasContended()); |
401 |
> |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
402 |
> |
waitForQueuedThread(sync, t2); |
403 |
> |
assertTrue(sync.hasContended()); |
404 |
> |
t1.interrupt(); |
405 |
> |
awaitTermination(t1); |
406 |
> |
assertTrue(sync.hasContended()); |
407 |
> |
sync.release(); |
408 |
> |
awaitTermination(t2); |
409 |
> |
assertTrue(sync.hasContended()); |
410 |
> |
} |
411 |
> |
|
412 |
> |
/** |
413 |
> |
* getQueuedThreads returns all waiting threads |
414 |
> |
*/ |
415 |
> |
public void testGetQueuedThreads() { |
416 |
> |
final Mutex sync = new Mutex(); |
417 |
> |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
418 |
> |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
419 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
420 |
> |
sync.acquire(); |
421 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
422 |
> |
t1.start(); |
423 |
> |
waitForQueuedThread(sync, t1); |
424 |
> |
assertHasExclusiveQueuedThreads(sync, t1); |
425 |
> |
assertTrue(sync.getQueuedThreads().contains(t1)); |
426 |
> |
assertFalse(sync.getQueuedThreads().contains(t2)); |
427 |
> |
t2.start(); |
428 |
> |
waitForQueuedThread(sync, t2); |
429 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
430 |
> |
assertTrue(sync.getQueuedThreads().contains(t1)); |
431 |
> |
assertTrue(sync.getQueuedThreads().contains(t2)); |
432 |
> |
t1.interrupt(); |
433 |
> |
awaitTermination(t1); |
434 |
> |
assertHasExclusiveQueuedThreads(sync, t2); |
435 |
> |
sync.release(); |
436 |
> |
awaitTermination(t2); |
437 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
438 |
> |
} |
439 |
> |
|
440 |
> |
/** |
441 |
> |
* getExclusiveQueuedThreads returns all exclusive waiting threads |
442 |
> |
*/ |
443 |
> |
public void testGetExclusiveQueuedThreads() { |
444 |
> |
final Mutex sync = new Mutex(); |
445 |
> |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
446 |
> |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
447 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
448 |
> |
sync.acquire(); |
449 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
450 |
> |
t1.start(); |
451 |
> |
waitForQueuedThread(sync, t1); |
452 |
> |
assertHasExclusiveQueuedThreads(sync, t1); |
453 |
> |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
454 |
> |
assertFalse(sync.getExclusiveQueuedThreads().contains(t2)); |
455 |
> |
t2.start(); |
456 |
> |
waitForQueuedThread(sync, t2); |
457 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
458 |
> |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
459 |
> |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
460 |
> |
t1.interrupt(); |
461 |
> |
awaitTermination(t1); |
462 |
> |
assertHasExclusiveQueuedThreads(sync, t2); |
463 |
> |
sync.release(); |
464 |
> |
awaitTermination(t2); |
465 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
466 |
> |
} |
467 |
> |
|
468 |
> |
/** |
469 |
> |
* getSharedQueuedThreads does not include exclusively waiting threads |
470 |
> |
*/ |
471 |
> |
public void testGetSharedQueuedThreads_Exclusive() { |
472 |
> |
final Mutex sync = new Mutex(); |
473 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
474 |
> |
sync.acquire(); |
475 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
476 |
> |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
477 |
> |
waitForQueuedThread(sync, t1); |
478 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
479 |
> |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
480 |
> |
waitForQueuedThread(sync, t2); |
481 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
482 |
> |
t1.interrupt(); |
483 |
> |
awaitTermination(t1); |
484 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
485 |
> |
sync.release(); |
486 |
> |
awaitTermination(t2); |
487 |
> |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
488 |
> |
} |
489 |
> |
|
490 |
> |
/** |
491 |
> |
* getSharedQueuedThreads returns all shared waiting threads |
492 |
> |
*/ |
493 |
> |
public void testGetSharedQueuedThreads_Shared() { |
494 |
> |
final BooleanLatch l = new BooleanLatch(); |
495 |
> |
assertHasSharedQueuedThreads(l, NO_THREADS); |
496 |
> |
Thread t1 = newStartedThread(new CheckedInterruptedRunnable() { |
497 |
> |
public void realRun() throws InterruptedException { |
498 |
> |
l.acquireSharedInterruptibly(0); |
499 |
> |
}}); |
500 |
> |
waitForQueuedThread(l, t1); |
501 |
> |
assertHasSharedQueuedThreads(l, t1); |
502 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
503 |
> |
public void realRun() throws InterruptedException { |
504 |
> |
l.acquireSharedInterruptibly(0); |
505 |
> |
}}); |
506 |
> |
waitForQueuedThread(l, t2); |
507 |
> |
assertHasSharedQueuedThreads(l, t1, t2); |
508 |
> |
t1.interrupt(); |
509 |
> |
awaitTermination(t1); |
510 |
> |
assertHasSharedQueuedThreads(l, t2); |
511 |
> |
assertTrue(l.releaseShared(0)); |
512 |
> |
awaitTermination(t2); |
513 |
> |
assertHasSharedQueuedThreads(l, NO_THREADS); |
514 |
> |
} |
515 |
> |
|
516 |
> |
/** |
517 |
> |
* tryAcquireNanos is interruptible |
518 |
> |
*/ |
519 |
> |
public void testTryAcquireNanos_Interruptible() { |
520 |
> |
final Mutex sync = new Mutex(); |
521 |
> |
sync.acquire(); |
522 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
523 |
> |
public void realRun() throws InterruptedException { |
524 |
> |
sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); |
525 |
> |
}}); |
526 |
> |
|
527 |
> |
waitForQueuedThread(sync, t); |
528 |
> |
t.interrupt(); |
529 |
> |
awaitTermination(t); |
530 |
> |
} |
531 |
> |
|
532 |
> |
/** |
533 |
> |
* tryAcquire on exclusively held sync fails |
534 |
> |
*/ |
535 |
> |
public void testTryAcquireWhenSynced() { |
536 |
> |
final Mutex sync = new Mutex(); |
537 |
> |
sync.acquire(); |
538 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
539 |
> |
public void realRun() { |
540 |
> |
assertFalse(sync.tryAcquire()); |
541 |
> |
}}); |
542 |
> |
|
543 |
> |
awaitTermination(t); |
544 |
> |
sync.release(); |
545 |
> |
} |
546 |
> |
|
547 |
> |
/** |
548 |
> |
* tryAcquireNanos on an exclusively held sync times out |
549 |
> |
*/ |
550 |
> |
public void testAcquireNanos_Timeout() { |
551 |
> |
final Mutex sync = new Mutex(); |
552 |
> |
sync.acquire(); |
553 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
554 |
> |
public void realRun() throws InterruptedException { |
555 |
> |
long startTime = System.nanoTime(); |
556 |
> |
long nanos = MILLISECONDS.toNanos(timeoutMillis()); |
557 |
> |
assertFalse(sync.tryAcquireNanos(nanos)); |
558 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
559 |
> |
}}); |
560 |
> |
|
561 |
> |
awaitTermination(t); |
562 |
> |
sync.release(); |
563 |
> |
} |
564 |
> |
|
565 |
> |
/** |
566 |
> |
* getState is true when acquired and false when not |
567 |
> |
*/ |
568 |
> |
public void testGetState() { |
569 |
> |
final Mutex sync = new Mutex(); |
570 |
> |
sync.acquire(); |
571 |
> |
assertTrue(sync.isHeldExclusively()); |
572 |
> |
sync.release(); |
573 |
> |
assertFalse(sync.isHeldExclusively()); |
574 |
> |
|
575 |
> |
final BooleanLatch acquired = new BooleanLatch(); |
576 |
> |
final BooleanLatch done = new BooleanLatch(); |
577 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
578 |
> |
public void realRun() throws InterruptedException { |
579 |
> |
sync.acquire(); |
580 |
> |
assertTrue(acquired.releaseShared(0)); |
581 |
> |
done.acquireShared(0); |
582 |
> |
sync.release(); |
583 |
> |
}}); |
584 |
> |
|
585 |
> |
acquired.acquireShared(0); |
586 |
> |
assertTrue(sync.isHeldExclusively()); |
587 |
> |
assertTrue(done.releaseShared(0)); |
588 |
> |
awaitTermination(t); |
589 |
> |
assertFalse(sync.isHeldExclusively()); |
590 |
> |
} |
591 |
> |
|
592 |
> |
/** |
593 |
> |
* acquireInterruptibly succeeds when released, else is interruptible |
594 |
> |
*/ |
595 |
> |
public void testAcquireInterruptibly() throws InterruptedException { |
596 |
> |
final Mutex sync = new Mutex(); |
597 |
> |
final BooleanLatch threadStarted = new BooleanLatch(); |
598 |
> |
sync.acquireInterruptibly(); |
599 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
600 |
> |
public void realRun() throws InterruptedException { |
601 |
> |
assertTrue(threadStarted.releaseShared(0)); |
602 |
> |
sync.acquireInterruptibly(); |
603 |
> |
}}); |
604 |
> |
|
605 |
> |
threadStarted.acquireShared(0); |
606 |
> |
waitForQueuedThread(sync, t); |
607 |
> |
t.interrupt(); |
608 |
> |
awaitTermination(t); |
609 |
> |
assertTrue(sync.isHeldExclusively()); |
610 |
> |
} |
611 |
> |
|
612 |
> |
/** |
613 |
> |
* owns is true for a condition created by sync else false |
614 |
> |
*/ |
615 |
> |
public void testOwns() { |
616 |
> |
final Mutex sync = new Mutex(); |
617 |
> |
final ConditionObject c = sync.newCondition(); |
618 |
> |
final Mutex sync2 = new Mutex(); |
619 |
> |
assertTrue(sync.owns(c)); |
620 |
> |
assertFalse(sync2.owns(c)); |
621 |
> |
} |
622 |
> |
|
623 |
> |
/** |
624 |
> |
* Calling await without holding sync throws IllegalMonitorStateException |
625 |
> |
*/ |
626 |
> |
public void testAwait_IMSE() { |
627 |
> |
final Mutex sync = new Mutex(); |
628 |
> |
final ConditionObject c = sync.newCondition(); |
629 |
> |
for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
630 |
> |
long startTime = System.nanoTime(); |
631 |
> |
try { |
632 |
> |
await(c, awaitMethod); |
633 |
> |
shouldThrow(); |
634 |
> |
} catch (IllegalMonitorStateException success) { |
635 |
> |
} catch (InterruptedException e) { threadUnexpectedException(e); } |
636 |
> |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
637 |
|
} |
638 |
|
} |
639 |
|
|
640 |
|
/** |
641 |
< |
* Calling signal without holding lock throws IllegalMonitorStateException |
641 |
> |
* Calling signal without holding sync throws IllegalMonitorStateException |
642 |
|
*/ |
643 |
< |
public void testSignal_IllegalMonitor() { |
644 |
< |
final Mutex lock = new Mutex(); |
645 |
< |
final Condition c = lock.newCondition(); |
643 |
> |
public void testSignal_IMSE() { |
644 |
> |
final Mutex sync = new Mutex(); |
645 |
> |
final ConditionObject c = sync.newCondition(); |
646 |
|
try { |
647 |
|
c.signal(); |
648 |
|
shouldThrow(); |
649 |
< |
} |
650 |
< |
catch (IllegalMonitorStateException success) { |
325 |
< |
} |
326 |
< |
catch (Exception ex) { |
327 |
< |
unexpectedException(); |
328 |
< |
} |
649 |
> |
} catch (IllegalMonitorStateException success) {} |
650 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
651 |
|
} |
652 |
|
|
653 |
|
/** |
654 |
< |
* awaitNanos without a signal times out |
654 |
> |
* Calling signalAll without holding sync throws IllegalMonitorStateException |
655 |
|
*/ |
656 |
< |
public void testAwaitNanos_Timeout() { |
657 |
< |
final Mutex lock = new Mutex(); |
658 |
< |
final Condition c = lock.newCondition(); |
656 |
> |
public void testSignalAll_IMSE() { |
657 |
> |
final Mutex sync = new Mutex(); |
658 |
> |
final ConditionObject c = sync.newCondition(); |
659 |
|
try { |
660 |
< |
lock.lock(); |
661 |
< |
long t = c.awaitNanos(100); |
662 |
< |
assertTrue(t <= 0); |
663 |
< |
lock.unlock(); |
664 |
< |
} |
665 |
< |
catch (Exception ex) { |
666 |
< |
unexpectedException(); |
667 |
< |
} |
660 |
> |
c.signalAll(); |
661 |
> |
shouldThrow(); |
662 |
> |
} catch (IllegalMonitorStateException success) {} |
663 |
> |
} |
664 |
> |
|
665 |
> |
/** |
666 |
> |
* await/awaitNanos/awaitUntil without a signal times out |
667 |
> |
*/ |
668 |
> |
public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); } |
669 |
> |
public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); } |
670 |
> |
public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); } |
671 |
> |
public void testAwait_Timeout(AwaitMethod awaitMethod) { |
672 |
> |
final Mutex sync = new Mutex(); |
673 |
> |
final ConditionObject c = sync.newCondition(); |
674 |
> |
sync.acquire(); |
675 |
> |
assertAwaitTimesOut(c, awaitMethod); |
676 |
> |
sync.release(); |
677 |
|
} |
678 |
|
|
679 |
|
/** |
680 |
< |
* timed await without a signal times out |
680 |
> |
* await/awaitNanos/awaitUntil returns when signalled |
681 |
|
*/ |
682 |
< |
public void testAwait_Timeout() { |
683 |
< |
final Mutex lock = new Mutex(); |
684 |
< |
final Condition c = lock.newCondition(); |
682 |
> |
public void testSignal_await() { testSignal(AwaitMethod.await); } |
683 |
> |
public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); } |
684 |
> |
public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); } |
685 |
> |
public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); } |
686 |
> |
public void testSignal(final AwaitMethod awaitMethod) { |
687 |
> |
final Mutex sync = new Mutex(); |
688 |
> |
final ConditionObject c = sync.newCondition(); |
689 |
> |
final BooleanLatch acquired = new BooleanLatch(); |
690 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
691 |
> |
public void realRun() throws InterruptedException { |
692 |
> |
sync.acquire(); |
693 |
> |
assertTrue(acquired.releaseShared(0)); |
694 |
> |
await(c, awaitMethod); |
695 |
> |
sync.release(); |
696 |
> |
}}); |
697 |
> |
|
698 |
> |
acquired.acquireShared(0); |
699 |
> |
sync.acquire(); |
700 |
> |
assertHasWaitersLocked(sync, c, t); |
701 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
702 |
> |
c.signal(); |
703 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
704 |
> |
assertHasExclusiveQueuedThreads(sync, t); |
705 |
> |
sync.release(); |
706 |
> |
awaitTermination(t); |
707 |
> |
} |
708 |
> |
|
709 |
> |
/** |
710 |
> |
* hasWaiters(null) throws NullPointerException |
711 |
> |
*/ |
712 |
> |
public void testHasWaitersNPE() { |
713 |
> |
final Mutex sync = new Mutex(); |
714 |
|
try { |
715 |
< |
lock.lock(); |
716 |
< |
assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
717 |
< |
lock.unlock(); |
358 |
< |
} |
359 |
< |
catch (Exception ex) { |
360 |
< |
unexpectedException(); |
361 |
< |
} |
715 |
> |
sync.hasWaiters(null); |
716 |
> |
shouldThrow(); |
717 |
> |
} catch (NullPointerException success) {} |
718 |
|
} |
719 |
|
|
720 |
|
/** |
721 |
< |
* awaitUntil without a signal times out |
721 |
> |
* getWaitQueueLength(null) throws NullPointerException |
722 |
|
*/ |
723 |
< |
public void testAwaitUntil_Timeout() { |
724 |
< |
final Mutex lock = new Mutex(); |
369 |
< |
final Condition c = lock.newCondition(); |
723 |
> |
public void testGetWaitQueueLengthNPE() { |
724 |
> |
final Mutex sync = new Mutex(); |
725 |
|
try { |
726 |
< |
lock.lock(); |
727 |
< |
java.util.Date d = new java.util.Date(); |
728 |
< |
assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10))); |
374 |
< |
lock.unlock(); |
375 |
< |
} |
376 |
< |
catch (Exception ex) { |
377 |
< |
unexpectedException(); |
378 |
< |
} |
726 |
> |
sync.getWaitQueueLength(null); |
727 |
> |
shouldThrow(); |
728 |
> |
} catch (NullPointerException success) {} |
729 |
|
} |
730 |
|
|
731 |
|
/** |
732 |
< |
* await returns when signalled |
732 |
> |
* getWaitingThreads(null) throws NullPointerException |
733 |
|
*/ |
734 |
< |
public void testAwait() { |
735 |
< |
final Mutex lock = new Mutex(); |
736 |
< |
final Condition c = lock.newCondition(); |
737 |
< |
Thread t = new Thread(new Runnable() { |
738 |
< |
public void run() { |
739 |
< |
try { |
740 |
< |
lock.lock(); |
391 |
< |
c.await(); |
392 |
< |
lock.unlock(); |
393 |
< |
} |
394 |
< |
catch(InterruptedException e) { |
395 |
< |
threadUnexpectedException(); |
396 |
< |
} |
397 |
< |
} |
398 |
< |
}); |
734 |
> |
public void testGetWaitingThreadsNPE() { |
735 |
> |
final Mutex sync = new Mutex(); |
736 |
> |
try { |
737 |
> |
sync.getWaitingThreads(null); |
738 |
> |
shouldThrow(); |
739 |
> |
} catch (NullPointerException success) {} |
740 |
> |
} |
741 |
|
|
742 |
+ |
/** |
743 |
+ |
* hasWaiters throws IllegalArgumentException if not owned |
744 |
+ |
*/ |
745 |
+ |
public void testHasWaitersIAE() { |
746 |
+ |
final Mutex sync = new Mutex(); |
747 |
+ |
final ConditionObject c = sync.newCondition(); |
748 |
+ |
final Mutex sync2 = new Mutex(); |
749 |
|
try { |
750 |
< |
t.start(); |
751 |
< |
Thread.sleep(SHORT_DELAY_MS); |
752 |
< |
lock.lock(); |
753 |
< |
c.signal(); |
754 |
< |
lock.unlock(); |
755 |
< |
t.join(SHORT_DELAY_MS); |
756 |
< |
assertFalse(t.isAlive()); |
750 |
> |
sync2.hasWaiters(c); |
751 |
> |
shouldThrow(); |
752 |
> |
} catch (IllegalArgumentException success) {} |
753 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
754 |
> |
} |
755 |
> |
|
756 |
> |
/** |
757 |
> |
* hasWaiters throws IllegalMonitorStateException if not synced |
758 |
> |
*/ |
759 |
> |
public void testHasWaitersIMSE() { |
760 |
> |
final Mutex sync = new Mutex(); |
761 |
> |
final ConditionObject c = sync.newCondition(); |
762 |
> |
try { |
763 |
> |
sync.hasWaiters(c); |
764 |
> |
shouldThrow(); |
765 |
> |
} catch (IllegalMonitorStateException success) {} |
766 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
767 |
> |
} |
768 |
> |
|
769 |
> |
/** |
770 |
> |
* getWaitQueueLength throws IllegalArgumentException if not owned |
771 |
> |
*/ |
772 |
> |
public void testGetWaitQueueLengthIAE() { |
773 |
> |
final Mutex sync = new Mutex(); |
774 |
> |
final ConditionObject c = sync.newCondition(); |
775 |
> |
final Mutex sync2 = new Mutex(); |
776 |
> |
try { |
777 |
> |
sync2.getWaitQueueLength(c); |
778 |
> |
shouldThrow(); |
779 |
> |
} catch (IllegalArgumentException success) {} |
780 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
781 |
> |
} |
782 |
> |
|
783 |
> |
/** |
784 |
> |
* getWaitQueueLength throws IllegalMonitorStateException if not synced |
785 |
> |
*/ |
786 |
> |
public void testGetWaitQueueLengthIMSE() { |
787 |
> |
final Mutex sync = new Mutex(); |
788 |
> |
final ConditionObject c = sync.newCondition(); |
789 |
> |
try { |
790 |
> |
sync.getWaitQueueLength(c); |
791 |
> |
shouldThrow(); |
792 |
> |
} catch (IllegalMonitorStateException success) {} |
793 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
794 |
> |
} |
795 |
> |
|
796 |
> |
/** |
797 |
> |
* getWaitingThreads throws IllegalArgumentException if not owned |
798 |
> |
*/ |
799 |
> |
public void testGetWaitingThreadsIAE() { |
800 |
> |
final Mutex sync = new Mutex(); |
801 |
> |
final ConditionObject c = sync.newCondition(); |
802 |
> |
final Mutex sync2 = new Mutex(); |
803 |
> |
try { |
804 |
> |
sync2.getWaitingThreads(c); |
805 |
> |
shouldThrow(); |
806 |
> |
} catch (IllegalArgumentException success) {} |
807 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
808 |
> |
} |
809 |
> |
|
810 |
> |
/** |
811 |
> |
* getWaitingThreads throws IllegalMonitorStateException if not synced |
812 |
> |
*/ |
813 |
> |
public void testGetWaitingThreadsIMSE() { |
814 |
> |
final Mutex sync = new Mutex(); |
815 |
> |
final ConditionObject c = sync.newCondition(); |
816 |
> |
try { |
817 |
> |
sync.getWaitingThreads(c); |
818 |
> |
shouldThrow(); |
819 |
> |
} catch (IllegalMonitorStateException success) {} |
820 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
821 |
> |
} |
822 |
> |
|
823 |
> |
/** |
824 |
> |
* hasWaiters returns true when a thread is waiting, else false |
825 |
> |
*/ |
826 |
> |
public void testHasWaiters() { |
827 |
> |
final Mutex sync = new Mutex(); |
828 |
> |
final ConditionObject c = sync.newCondition(); |
829 |
> |
final BooleanLatch acquired = new BooleanLatch(); |
830 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
831 |
> |
public void realRun() throws InterruptedException { |
832 |
> |
sync.acquire(); |
833 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
834 |
> |
assertFalse(sync.hasWaiters(c)); |
835 |
> |
assertTrue(acquired.releaseShared(0)); |
836 |
> |
c.await(); |
837 |
> |
sync.release(); |
838 |
> |
}}); |
839 |
> |
|
840 |
> |
acquired.acquireShared(0); |
841 |
> |
sync.acquire(); |
842 |
> |
assertHasWaitersLocked(sync, c, t); |
843 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
844 |
> |
assertTrue(sync.hasWaiters(c)); |
845 |
> |
c.signal(); |
846 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
847 |
> |
assertHasExclusiveQueuedThreads(sync, t); |
848 |
> |
assertFalse(sync.hasWaiters(c)); |
849 |
> |
sync.release(); |
850 |
> |
|
851 |
> |
awaitTermination(t); |
852 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
853 |
> |
} |
854 |
> |
|
855 |
> |
/** |
856 |
> |
* getWaitQueueLength returns number of waiting threads |
857 |
> |
*/ |
858 |
> |
public void testGetWaitQueueLength() { |
859 |
> |
final Mutex sync = new Mutex(); |
860 |
> |
final ConditionObject c = sync.newCondition(); |
861 |
> |
final BooleanLatch acquired1 = new BooleanLatch(); |
862 |
> |
final BooleanLatch acquired2 = new BooleanLatch(); |
863 |
> |
final Thread t1 = newStartedThread(new CheckedRunnable() { |
864 |
> |
public void realRun() throws InterruptedException { |
865 |
> |
sync.acquire(); |
866 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
867 |
> |
assertEquals(0, sync.getWaitQueueLength(c)); |
868 |
> |
assertTrue(acquired1.releaseShared(0)); |
869 |
> |
c.await(); |
870 |
> |
sync.release(); |
871 |
> |
}}); |
872 |
> |
acquired1.acquireShared(0); |
873 |
> |
sync.acquire(); |
874 |
> |
assertHasWaitersLocked(sync, c, t1); |
875 |
> |
assertEquals(1, sync.getWaitQueueLength(c)); |
876 |
> |
sync.release(); |
877 |
> |
|
878 |
> |
final Thread t2 = newStartedThread(new CheckedRunnable() { |
879 |
> |
public void realRun() throws InterruptedException { |
880 |
> |
sync.acquire(); |
881 |
> |
assertHasWaitersLocked(sync, c, t1); |
882 |
> |
assertEquals(1, sync.getWaitQueueLength(c)); |
883 |
> |
assertTrue(acquired2.releaseShared(0)); |
884 |
> |
c.await(); |
885 |
> |
sync.release(); |
886 |
> |
}}); |
887 |
> |
acquired2.acquireShared(0); |
888 |
> |
sync.acquire(); |
889 |
> |
assertHasWaitersLocked(sync, c, t1, t2); |
890 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
891 |
> |
assertEquals(2, sync.getWaitQueueLength(c)); |
892 |
> |
c.signalAll(); |
893 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
894 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
895 |
> |
assertEquals(0, sync.getWaitQueueLength(c)); |
896 |
> |
sync.release(); |
897 |
> |
|
898 |
> |
awaitTermination(t1); |
899 |
> |
awaitTermination(t2); |
900 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
901 |
> |
} |
902 |
> |
|
903 |
> |
/** |
904 |
> |
* getWaitingThreads returns only and all waiting threads |
905 |
> |
*/ |
906 |
> |
public void testGetWaitingThreads() { |
907 |
> |
final Mutex sync = new Mutex(); |
908 |
> |
final ConditionObject c = sync.newCondition(); |
909 |
> |
final BooleanLatch acquired1 = new BooleanLatch(); |
910 |
> |
final BooleanLatch acquired2 = new BooleanLatch(); |
911 |
> |
final Thread t1 = new Thread(new CheckedRunnable() { |
912 |
> |
public void realRun() throws InterruptedException { |
913 |
> |
sync.acquire(); |
914 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
915 |
> |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
916 |
> |
assertTrue(acquired1.releaseShared(0)); |
917 |
> |
c.await(); |
918 |
> |
sync.release(); |
919 |
> |
}}); |
920 |
> |
|
921 |
> |
final Thread t2 = new Thread(new CheckedRunnable() { |
922 |
> |
public void realRun() throws InterruptedException { |
923 |
> |
sync.acquire(); |
924 |
> |
assertHasWaitersLocked(sync, c, t1); |
925 |
> |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
926 |
> |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
927 |
> |
assertEquals(1, sync.getWaitingThreads(c).size()); |
928 |
> |
assertTrue(acquired2.releaseShared(0)); |
929 |
> |
c.await(); |
930 |
> |
sync.release(); |
931 |
> |
}}); |
932 |
> |
|
933 |
> |
sync.acquire(); |
934 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
935 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t1)); |
936 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
937 |
> |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
938 |
> |
assertEquals(0, sync.getWaitingThreads(c).size()); |
939 |
> |
sync.release(); |
940 |
> |
|
941 |
> |
t1.start(); |
942 |
> |
acquired1.acquireShared(0); |
943 |
> |
sync.acquire(); |
944 |
> |
assertHasWaitersLocked(sync, c, t1); |
945 |
> |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
946 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
947 |
> |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
948 |
> |
assertEquals(1, sync.getWaitingThreads(c).size()); |
949 |
> |
sync.release(); |
950 |
> |
|
951 |
> |
t2.start(); |
952 |
> |
acquired2.acquireShared(0); |
953 |
> |
sync.acquire(); |
954 |
> |
assertHasWaitersLocked(sync, c, t1, t2); |
955 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
956 |
> |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
957 |
> |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
958 |
> |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
959 |
> |
assertEquals(2, sync.getWaitingThreads(c).size()); |
960 |
> |
c.signalAll(); |
961 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
962 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
963 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t1)); |
964 |
> |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
965 |
> |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
966 |
> |
assertEquals(0, sync.getWaitingThreads(c).size()); |
967 |
> |
sync.release(); |
968 |
> |
|
969 |
> |
awaitTermination(t1); |
970 |
> |
awaitTermination(t2); |
971 |
> |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
972 |
> |
} |
973 |
> |
|
974 |
> |
/** |
975 |
> |
* awaitUninterruptibly is uninterruptible |
976 |
> |
*/ |
977 |
> |
public void testAwaitUninterruptibly() { |
978 |
> |
final Mutex sync = new Mutex(); |
979 |
> |
final ConditionObject condition = sync.newCondition(); |
980 |
> |
final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
981 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
982 |
> |
public void realRun() { |
983 |
> |
sync.acquire(); |
984 |
> |
assertTrue(pleaseInterrupt.releaseShared(0)); |
985 |
> |
condition.awaitUninterruptibly(); |
986 |
> |
assertTrue(Thread.interrupted()); |
987 |
> |
assertHasWaitersLocked(sync, condition, NO_THREADS); |
988 |
> |
sync.release(); |
989 |
> |
}}); |
990 |
> |
|
991 |
> |
pleaseInterrupt.acquireShared(0); |
992 |
> |
sync.acquire(); |
993 |
> |
assertHasWaitersLocked(sync, condition, t); |
994 |
> |
sync.release(); |
995 |
> |
t.interrupt(); |
996 |
> |
assertHasWaitersUnlocked(sync, condition, t); |
997 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
998 |
> |
sync.acquire(); |
999 |
> |
assertHasWaitersLocked(sync, condition, t); |
1000 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1001 |
> |
condition.signal(); |
1002 |
> |
assertHasWaitersLocked(sync, condition, NO_THREADS); |
1003 |
> |
assertHasExclusiveQueuedThreads(sync, t); |
1004 |
> |
sync.release(); |
1005 |
> |
awaitTermination(t); |
1006 |
> |
} |
1007 |
> |
|
1008 |
> |
/** |
1009 |
> |
* await/awaitNanos/awaitUntil is interruptible |
1010 |
> |
*/ |
1011 |
> |
public void testInterruptible_await() { testInterruptible(AwaitMethod.await); } |
1012 |
> |
public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); } |
1013 |
> |
public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); } |
1014 |
> |
public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); } |
1015 |
> |
public void testInterruptible(final AwaitMethod awaitMethod) { |
1016 |
> |
final Mutex sync = new Mutex(); |
1017 |
> |
final ConditionObject c = sync.newCondition(); |
1018 |
> |
final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
1019 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1020 |
> |
public void realRun() throws InterruptedException { |
1021 |
> |
sync.acquire(); |
1022 |
> |
assertTrue(pleaseInterrupt.releaseShared(0)); |
1023 |
> |
await(c, awaitMethod); |
1024 |
> |
}}); |
1025 |
> |
|
1026 |
> |
pleaseInterrupt.acquireShared(0); |
1027 |
> |
t.interrupt(); |
1028 |
> |
awaitTermination(t); |
1029 |
> |
} |
1030 |
> |
|
1031 |
> |
/** |
1032 |
> |
* signalAll wakes up all threads |
1033 |
> |
*/ |
1034 |
> |
public void testSignalAll_await() { testSignalAll(AwaitMethod.await); } |
1035 |
> |
public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); } |
1036 |
> |
public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); } |
1037 |
> |
public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); } |
1038 |
> |
public void testSignalAll(final AwaitMethod awaitMethod) { |
1039 |
> |
final Mutex sync = new Mutex(); |
1040 |
> |
final ConditionObject c = sync.newCondition(); |
1041 |
> |
final BooleanLatch acquired1 = new BooleanLatch(); |
1042 |
> |
final BooleanLatch acquired2 = new BooleanLatch(); |
1043 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1044 |
> |
public void realRun() throws InterruptedException { |
1045 |
> |
sync.acquire(); |
1046 |
> |
acquired1.releaseShared(0); |
1047 |
> |
await(c, awaitMethod); |
1048 |
> |
sync.release(); |
1049 |
> |
}}); |
1050 |
> |
|
1051 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1052 |
> |
public void realRun() throws InterruptedException { |
1053 |
> |
sync.acquire(); |
1054 |
> |
acquired2.releaseShared(0); |
1055 |
> |
await(c, awaitMethod); |
1056 |
> |
sync.release(); |
1057 |
> |
}}); |
1058 |
> |
|
1059 |
> |
acquired1.acquireShared(0); |
1060 |
> |
acquired2.acquireShared(0); |
1061 |
> |
sync.acquire(); |
1062 |
> |
assertHasWaitersLocked(sync, c, t1, t2); |
1063 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1064 |
> |
c.signalAll(); |
1065 |
> |
assertHasWaitersLocked(sync, c, NO_THREADS); |
1066 |
> |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
1067 |
> |
sync.release(); |
1068 |
> |
awaitTermination(t1); |
1069 |
> |
awaitTermination(t2); |
1070 |
> |
} |
1071 |
> |
|
1072 |
> |
/** |
1073 |
> |
* toString indicates current state |
1074 |
> |
*/ |
1075 |
> |
public void testToString() { |
1076 |
> |
Mutex sync = new Mutex(); |
1077 |
> |
assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED)); |
1078 |
> |
sync.acquire(); |
1079 |
> |
assertTrue(sync.toString().contains("State = " + Mutex.LOCKED)); |
1080 |
> |
} |
1081 |
> |
|
1082 |
> |
/** |
1083 |
> |
* A serialized AQS deserializes with current state, but no queued threads |
1084 |
> |
*/ |
1085 |
> |
public void testSerialization() { |
1086 |
> |
Mutex sync = new Mutex(); |
1087 |
> |
assertFalse(serialClone(sync).isHeldExclusively()); |
1088 |
> |
sync.acquire(); |
1089 |
> |
Thread t = newStartedThread(new InterruptedSyncRunnable(sync)); |
1090 |
> |
waitForQueuedThread(sync, t); |
1091 |
> |
assertTrue(sync.isHeldExclusively()); |
1092 |
> |
|
1093 |
> |
Mutex clone = serialClone(sync); |
1094 |
> |
assertTrue(clone.isHeldExclusively()); |
1095 |
> |
assertHasExclusiveQueuedThreads(sync, t); |
1096 |
> |
assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
1097 |
> |
t.interrupt(); |
1098 |
> |
awaitTermination(t); |
1099 |
> |
sync.release(); |
1100 |
> |
assertFalse(sync.isHeldExclusively()); |
1101 |
> |
assertTrue(clone.isHeldExclusively()); |
1102 |
> |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1103 |
> |
assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
1104 |
> |
} |
1105 |
> |
|
1106 |
> |
/** |
1107 |
> |
* tryReleaseShared setting state changes getState |
1108 |
> |
*/ |
1109 |
> |
public void testGetStateWithReleaseShared() { |
1110 |
> |
final BooleanLatch l = new BooleanLatch(); |
1111 |
> |
assertFalse(l.isSignalled()); |
1112 |
> |
assertTrue(l.releaseShared(0)); |
1113 |
> |
assertTrue(l.isSignalled()); |
1114 |
> |
} |
1115 |
> |
|
1116 |
> |
/** |
1117 |
> |
* releaseShared has no effect when already signalled |
1118 |
> |
*/ |
1119 |
> |
public void testReleaseShared() { |
1120 |
> |
final BooleanLatch l = new BooleanLatch(); |
1121 |
> |
assertFalse(l.isSignalled()); |
1122 |
> |
assertTrue(l.releaseShared(0)); |
1123 |
> |
assertTrue(l.isSignalled()); |
1124 |
> |
assertTrue(l.releaseShared(0)); |
1125 |
> |
assertTrue(l.isSignalled()); |
1126 |
> |
} |
1127 |
> |
|
1128 |
> |
/** |
1129 |
> |
* acquireSharedInterruptibly returns after release, but not before |
1130 |
> |
*/ |
1131 |
> |
public void testAcquireSharedInterruptibly() { |
1132 |
> |
final BooleanLatch l = new BooleanLatch(); |
1133 |
> |
|
1134 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
1135 |
> |
public void realRun() throws InterruptedException { |
1136 |
> |
assertFalse(l.isSignalled()); |
1137 |
> |
l.acquireSharedInterruptibly(0); |
1138 |
> |
assertTrue(l.isSignalled()); |
1139 |
> |
l.acquireSharedInterruptibly(0); |
1140 |
> |
assertTrue(l.isSignalled()); |
1141 |
> |
}}); |
1142 |
> |
|
1143 |
> |
waitForQueuedThread(l, t); |
1144 |
> |
assertFalse(l.isSignalled()); |
1145 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
1146 |
> |
assertHasSharedQueuedThreads(l, t); |
1147 |
> |
assertTrue(l.releaseShared(0)); |
1148 |
> |
assertTrue(l.isSignalled()); |
1149 |
> |
awaitTermination(t); |
1150 |
> |
} |
1151 |
> |
|
1152 |
> |
/** |
1153 |
> |
* tryAcquireSharedNanos returns after release, but not before |
1154 |
> |
*/ |
1155 |
> |
public void testTryAcquireSharedNanos() { |
1156 |
> |
final BooleanLatch l = new BooleanLatch(); |
1157 |
> |
|
1158 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
1159 |
> |
public void realRun() throws InterruptedException { |
1160 |
> |
assertFalse(l.isSignalled()); |
1161 |
> |
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1162 |
> |
assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
1163 |
> |
assertTrue(l.isSignalled()); |
1164 |
> |
assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
1165 |
> |
assertTrue(l.isSignalled()); |
1166 |
> |
}}); |
1167 |
> |
|
1168 |
> |
waitForQueuedThread(l, t); |
1169 |
> |
assertFalse(l.isSignalled()); |
1170 |
> |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
1171 |
> |
assertTrue(l.releaseShared(0)); |
1172 |
> |
assertTrue(l.isSignalled()); |
1173 |
> |
awaitTermination(t); |
1174 |
> |
} |
1175 |
> |
|
1176 |
> |
/** |
1177 |
> |
* acquireSharedInterruptibly is interruptible |
1178 |
> |
*/ |
1179 |
> |
public void testAcquireSharedInterruptibly_Interruptible() { |
1180 |
> |
final BooleanLatch l = new BooleanLatch(); |
1181 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1182 |
> |
public void realRun() throws InterruptedException { |
1183 |
> |
assertFalse(l.isSignalled()); |
1184 |
> |
l.acquireSharedInterruptibly(0); |
1185 |
> |
}}); |
1186 |
> |
|
1187 |
> |
waitForQueuedThread(l, t); |
1188 |
> |
assertFalse(l.isSignalled()); |
1189 |
> |
t.interrupt(); |
1190 |
> |
awaitTermination(t); |
1191 |
> |
assertFalse(l.isSignalled()); |
1192 |
> |
} |
1193 |
> |
|
1194 |
> |
/** |
1195 |
> |
* tryAcquireSharedNanos is interruptible |
1196 |
> |
*/ |
1197 |
> |
public void testTryAcquireSharedNanos_Interruptible() { |
1198 |
> |
final BooleanLatch l = new BooleanLatch(); |
1199 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1200 |
> |
public void realRun() throws InterruptedException { |
1201 |
> |
assertFalse(l.isSignalled()); |
1202 |
> |
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1203 |
> |
l.tryAcquireSharedNanos(0, nanos); |
1204 |
> |
}}); |
1205 |
> |
|
1206 |
> |
waitForQueuedThread(l, t); |
1207 |
> |
assertFalse(l.isSignalled()); |
1208 |
> |
t.interrupt(); |
1209 |
> |
awaitTermination(t); |
1210 |
> |
assertFalse(l.isSignalled()); |
1211 |
> |
} |
1212 |
> |
|
1213 |
> |
/** |
1214 |
> |
* tryAcquireSharedNanos times out if not released before timeout |
1215 |
> |
*/ |
1216 |
> |
public void testTryAcquireSharedNanos_Timeout() { |
1217 |
> |
final BooleanLatch l = new BooleanLatch(); |
1218 |
> |
final BooleanLatch observedQueued = new BooleanLatch(); |
1219 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
1220 |
> |
public void realRun() throws InterruptedException { |
1221 |
> |
assertFalse(l.isSignalled()); |
1222 |
> |
for (long millis = timeoutMillis(); |
1223 |
> |
!observedQueued.isSignalled(); |
1224 |
> |
millis *= 2) { |
1225 |
> |
long nanos = MILLISECONDS.toNanos(millis); |
1226 |
> |
long startTime = System.nanoTime(); |
1227 |
> |
assertFalse(l.tryAcquireSharedNanos(0, nanos)); |
1228 |
> |
assertTrue(millisElapsedSince(startTime) >= millis); |
1229 |
> |
} |
1230 |
> |
assertFalse(l.isSignalled()); |
1231 |
> |
}}); |
1232 |
> |
|
1233 |
> |
waitForQueuedThread(l, t); |
1234 |
> |
observedQueued.releaseShared(0); |
1235 |
> |
assertFalse(l.isSignalled()); |
1236 |
> |
awaitTermination(t); |
1237 |
> |
assertFalse(l.isSignalled()); |
1238 |
> |
} |
1239 |
> |
|
1240 |
> |
/** |
1241 |
> |
* awaitNanos/timed await with 0 wait times out immediately |
1242 |
> |
*/ |
1243 |
> |
public void testAwait_Zero() throws InterruptedException { |
1244 |
> |
final Mutex sync = new Mutex(); |
1245 |
> |
final ConditionObject c = sync.newCondition(); |
1246 |
> |
sync.acquire(); |
1247 |
> |
assertTrue(c.awaitNanos(0L) <= 0); |
1248 |
> |
assertFalse(c.await(0L, NANOSECONDS)); |
1249 |
> |
sync.release(); |
1250 |
> |
} |
1251 |
> |
|
1252 |
> |
/** |
1253 |
> |
* awaitNanos/timed await with maximum negative wait times does not underflow |
1254 |
> |
*/ |
1255 |
> |
public void testAwait_NegativeInfinity() throws InterruptedException { |
1256 |
> |
final Mutex sync = new Mutex(); |
1257 |
> |
final ConditionObject c = sync.newCondition(); |
1258 |
> |
sync.acquire(); |
1259 |
> |
assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0); |
1260 |
> |
assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS)); |
1261 |
> |
sync.release(); |
1262 |
> |
} |
1263 |
> |
|
1264 |
> |
/** |
1265 |
> |
* Disabled demo test for (unfixed as of 2017-11) |
1266 |
> |
* JDK-8191483: AbstractQueuedSynchronizer cancel/cancel race |
1267 |
> |
* ant -Djsr166.tckTestClass=AbstractQueuedSynchronizerTest -Djsr166.methodFilter=testCancelCancelRace -Djsr166.runsPerTest=100 tck |
1268 |
> |
*/ |
1269 |
> |
public void XXXXtestCancelCancelRace() throws InterruptedException { |
1270 |
> |
class Sync extends AbstractQueuedSynchronizer { |
1271 |
> |
protected boolean tryAcquire(int acquires) { |
1272 |
> |
return !hasQueuedPredecessors() && compareAndSetState(0, 1); |
1273 |
> |
} |
1274 |
> |
protected boolean tryRelease(int releases) { |
1275 |
> |
return compareAndSetState(1, 0); |
1276 |
> |
} |
1277 |
|
} |
1278 |
< |
catch (Exception ex) { |
1279 |
< |
unexpectedException(); |
1278 |
> |
|
1279 |
> |
Sync s = new Sync(); |
1280 |
> |
s.acquire(1); // acquire to force other threads to enqueue |
1281 |
> |
|
1282 |
> |
// try to trigger double cancel race with two background threads |
1283 |
> |
ArrayList<Thread> threads = new ArrayList<>(); |
1284 |
> |
Runnable failedAcquire = () -> { |
1285 |
> |
try { |
1286 |
> |
s.acquireInterruptibly(1); |
1287 |
> |
shouldThrow(); |
1288 |
> |
} catch (InterruptedException expected) {} |
1289 |
> |
}; |
1290 |
> |
for (int i = 0; i < 2; i++) { |
1291 |
> |
Thread thread = new Thread(failedAcquire); |
1292 |
> |
thread.start(); |
1293 |
> |
threads.add(thread); |
1294 |
> |
} |
1295 |
> |
Thread.sleep(100); |
1296 |
> |
for (Thread thread : threads) thread.interrupt(); |
1297 |
> |
for (Thread thread : threads) awaitTermination(thread); |
1298 |
> |
|
1299 |
> |
s.release(1); |
1300 |
> |
|
1301 |
> |
// no one holds lock now, we should be able to acquire |
1302 |
> |
if (!s.tryAcquire(1)) |
1303 |
> |
throw new RuntimeException( |
1304 |
> |
String.format( |
1305 |
> |
"Broken: hasQueuedPredecessors=%s hasQueuedThreads=%s queueLength=%d firstQueuedThread=%s", |
1306 |
> |
s.hasQueuedPredecessors(), |
1307 |
> |
s.hasQueuedThreads(), |
1308 |
> |
s.getQueueLength(), |
1309 |
> |
s.getFirstQueuedThread())); |
1310 |
> |
} |
1311 |
> |
|
1312 |
> |
/** |
1313 |
> |
* Tests scenario for |
1314 |
> |
* JDK-8191937: Lost interrupt in AbstractQueuedSynchronizer when tryAcquire methods throw |
1315 |
> |
*/ |
1316 |
> |
public void testInterruptedFailingAcquire() throws InterruptedException { |
1317 |
> |
final RuntimeException ex = new RuntimeException(); |
1318 |
> |
|
1319 |
> |
// A synchronizer only offering a choice of failure modes |
1320 |
> |
class Sync extends AbstractQueuedSynchronizer { |
1321 |
> |
boolean pleaseThrow; |
1322 |
> |
@Override protected boolean tryAcquire(int ignored) { |
1323 |
> |
if (pleaseThrow) throw ex; |
1324 |
> |
return false; |
1325 |
> |
} |
1326 |
> |
@Override protected int tryAcquireShared(int ignored) { |
1327 |
> |
if (pleaseThrow) throw ex; |
1328 |
> |
return -1; |
1329 |
> |
} |
1330 |
> |
@Override protected boolean tryRelease(int ignored) { |
1331 |
> |
return true; |
1332 |
> |
} |
1333 |
> |
@Override protected boolean tryReleaseShared(int ignored) { |
1334 |
> |
return true; |
1335 |
> |
} |
1336 |
|
} |
1337 |
+ |
|
1338 |
+ |
final Sync s = new Sync(); |
1339 |
+ |
|
1340 |
+ |
final Thread thread = newStartedThread(new CheckedRunnable() { |
1341 |
+ |
public void realRun() { |
1342 |
+ |
try { |
1343 |
+ |
if (ThreadLocalRandom.current().nextBoolean()) |
1344 |
+ |
s.acquire(1); |
1345 |
+ |
else |
1346 |
+ |
s.acquireShared(1); |
1347 |
+ |
shouldThrow(); |
1348 |
+ |
} catch (Throwable t) { |
1349 |
+ |
assertSame(ex, t); |
1350 |
+ |
assertTrue(Thread.interrupted()); |
1351 |
+ |
} |
1352 |
+ |
}}); |
1353 |
+ |
waitForThreadToEnterWaitState(thread); |
1354 |
+ |
assertSame(thread, s.getFirstQueuedThread()); |
1355 |
+ |
assertTrue(s.hasQueuedPredecessors()); |
1356 |
+ |
assertTrue(s.hasQueuedThreads()); |
1357 |
+ |
assertEquals(1, s.getQueueLength()); |
1358 |
+ |
|
1359 |
+ |
s.pleaseThrow = true; |
1360 |
+ |
thread.interrupt(); |
1361 |
+ |
s.release(1); |
1362 |
+ |
awaitTermination(thread); |
1363 |
|
} |
1364 |
< |
|
1364 |
> |
|
1365 |
|
} |