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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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|
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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|
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.HashSet; |
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import java.util.concurrent.locks.AbstractQueuedLongSynchronizer; |
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import java.util.concurrent.locks.AbstractQueuedLongSynchronizer.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 AbstractQueuedLongSynchronizerTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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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(AbstractQueuedLongSynchronizerTest.class); |
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} |
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|
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/** |
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* A simple mutex class, adapted from the class javadoc. Exclusive |
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* acquire tests exercise this as a sample user extension. |
34 |
*/ |
35 |
static class Mutex extends AbstractQueuedLongSynchronizer { |
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/** An eccentric value > 32 bits for locked synchronizer state. */ |
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static final long LOCKED = (1L << 63) | (1L << 15); |
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|
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static final long UNLOCKED = 0; |
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|
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public boolean isHeldExclusively() { |
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long 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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public boolean tryAcquire(long acquires) { |
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assertEquals(LOCKED, acquires); |
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return compareAndSetState(UNLOCKED, LOCKED); |
50 |
} |
51 |
|
52 |
public boolean tryRelease(long releases) { |
53 |
if (getState() != LOCKED) throw new IllegalMonitorStateException(); |
54 |
setState(UNLOCKED); |
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return true; |
56 |
} |
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|
58 |
public boolean tryAcquireNanos(long nanos) throws InterruptedException { |
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return tryAcquireNanos(LOCKED, nanos); |
60 |
} |
61 |
|
62 |
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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|
70 |
public void acquire() { |
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acquire(LOCKED); |
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} |
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|
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public void acquireInterruptibly() throws InterruptedException { |
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acquireInterruptibly(LOCKED); |
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} |
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|
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public void release() { |
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release(LOCKED); |
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} |
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|
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public ConditionObject newCondition() { |
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return new ConditionObject(); |
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} |
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} |
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|
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/** |
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* A simple latch class, to test shared mode. |
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*/ |
90 |
static class BooleanLatch extends AbstractQueuedLongSynchronizer { |
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public boolean isSignalled() { return getState() != 0; } |
92 |
|
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public long tryAcquireShared(long ignore) { |
94 |
return isSignalled() ? 1 : -1; |
95 |
} |
96 |
|
97 |
public boolean tryReleaseShared(long ignore) { |
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setState(1L << 62); |
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return true; |
100 |
} |
101 |
} |
102 |
|
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/** |
104 |
* A runnable calling acquireInterruptibly that does not expect to |
105 |
* be interrupted. |
106 |
*/ |
107 |
class InterruptibleSyncRunnable extends CheckedRunnable { |
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final Mutex sync; |
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InterruptibleSyncRunnable(Mutex sync) { this.sync = sync; } |
110 |
public void realRun() throws InterruptedException { |
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sync.acquireInterruptibly(); |
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} |
113 |
} |
114 |
|
115 |
/** |
116 |
* A runnable calling acquireInterruptibly that expects to be |
117 |
* interrupted. |
118 |
*/ |
119 |
class InterruptedSyncRunnable extends CheckedInterruptedRunnable { |
120 |
final Mutex sync; |
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InterruptedSyncRunnable(Mutex sync) { this.sync = sync; } |
122 |
public void realRun() throws InterruptedException { |
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sync.acquireInterruptibly(); |
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} |
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} |
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|
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/** A constant to clarify calls to checking methods below. */ |
128 |
static final Thread[] NO_THREADS = new Thread[0]; |
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|
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/** |
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* Spin-waits until sync.isQueued(t) becomes true. |
132 |
*/ |
133 |
void waitForQueuedThread(AbstractQueuedLongSynchronizer sync, |
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Thread t) { |
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long startTime = System.nanoTime(); |
136 |
while (!sync.isQueued(t)) { |
137 |
if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
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throw new AssertionFailedError("timed out"); |
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Thread.yield(); |
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} |
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assertTrue(t.isAlive()); |
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} |
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|
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/** |
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* Checks that sync has exactly the given queued threads. |
146 |
*/ |
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void assertHasQueuedThreads(AbstractQueuedLongSynchronizer sync, |
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Thread... expected) { |
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Collection<Thread> actual = sync.getQueuedThreads(); |
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assertEquals(expected.length > 0, sync.hasQueuedThreads()); |
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assertEquals(expected.length, sync.getQueueLength()); |
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assertEquals(expected.length, actual.size()); |
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assertEquals(expected.length == 0, actual.isEmpty()); |
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assertEquals(new HashSet<Thread>(actual), |
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new HashSet<Thread>(Arrays.asList(expected))); |
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} |
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|
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/** |
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* Checks that sync has exactly the given (exclusive) queued threads. |
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*/ |
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void assertHasExclusiveQueuedThreads(AbstractQueuedLongSynchronizer sync, |
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Thread... expected) { |
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assertHasQueuedThreads(sync, expected); |
164 |
assertEquals(new HashSet<Thread>(sync.getExclusiveQueuedThreads()), |
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new HashSet<Thread>(sync.getQueuedThreads())); |
166 |
assertEquals(0, sync.getSharedQueuedThreads().size()); |
167 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
168 |
} |
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|
170 |
/** |
171 |
* Checks that sync has exactly the given (shared) queued threads. |
172 |
*/ |
173 |
void assertHasSharedQueuedThreads(AbstractQueuedLongSynchronizer sync, |
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Thread... expected) { |
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assertHasQueuedThreads(sync, expected); |
176 |
assertEquals(new HashSet<Thread>(sync.getSharedQueuedThreads()), |
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new HashSet<Thread>(sync.getQueuedThreads())); |
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assertEquals(0, sync.getExclusiveQueuedThreads().size()); |
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assertTrue(sync.getExclusiveQueuedThreads().isEmpty()); |
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} |
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|
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/** |
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* Checks that condition c has exactly the given waiter threads, |
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* after acquiring mutex. |
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*/ |
186 |
void assertHasWaitersUnlocked(Mutex sync, ConditionObject c, |
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Thread... threads) { |
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sync.acquire(); |
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assertHasWaitersLocked(sync, c, threads); |
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sync.release(); |
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} |
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|
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/** |
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* Checks that condition c has exactly the given waiter threads. |
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*/ |
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void assertHasWaitersLocked(Mutex sync, ConditionObject c, |
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Thread... threads) { |
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assertEquals(threads.length > 0, sync.hasWaiters(c)); |
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assertEquals(threads.length, sync.getWaitQueueLength(c)); |
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assertEquals(threads.length == 0, sync.getWaitingThreads(c).isEmpty()); |
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assertEquals(threads.length, sync.getWaitingThreads(c).size()); |
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assertEquals(new HashSet<Thread>(sync.getWaitingThreads(c)), |
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new HashSet<Thread>(Arrays.asList(threads))); |
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} |
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|
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enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil } |
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|
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/** |
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* Awaits condition using the specified AwaitMethod. |
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*/ |
211 |
void await(ConditionObject c, AwaitMethod awaitMethod) |
212 |
throws InterruptedException { |
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long timeoutMillis = 2 * LONG_DELAY_MS; |
214 |
switch (awaitMethod) { |
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case await: |
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c.await(); |
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break; |
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case awaitTimed: |
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assertTrue(c.await(timeoutMillis, MILLISECONDS)); |
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break; |
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case awaitNanos: |
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long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
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long nanosRemaining = c.awaitNanos(nanosTimeout); |
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assertTrue(nanosRemaining > 0); |
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break; |
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case awaitUntil: |
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assertTrue(c.awaitUntil(delayedDate(timeoutMillis))); |
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break; |
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default: |
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throw new AssertionError(); |
231 |
} |
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} |
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|
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/** |
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* Checks that awaiting the given condition times out (using the |
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* default timeout duration). |
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*/ |
238 |
void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) { |
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final long timeoutMillis = timeoutMillis(); |
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final long startTime; |
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try { |
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switch (awaitMethod) { |
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case awaitTimed: |
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startTime = System.nanoTime(); |
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assertFalse(c.await(timeoutMillis, MILLISECONDS)); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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break; |
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case awaitNanos: |
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startTime = System.nanoTime(); |
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long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis); |
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long nanosRemaining = c.awaitNanos(nanosTimeout); |
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assertTrue(nanosRemaining <= 0); |
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assertTrue(nanosRemaining > -MILLISECONDS.toNanos(LONG_DELAY_MS)); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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break; |
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case awaitUntil: |
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// We shouldn't assume that nanoTime and currentTimeMillis |
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// use the same time source, so don't use nanoTime here. |
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java.util.Date delayedDate = delayedDate(timeoutMillis); |
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assertFalse(c.awaitUntil(delayedDate(timeoutMillis))); |
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assertTrue(new java.util.Date().getTime() >= delayedDate.getTime()); |
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break; |
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default: |
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throw new UnsupportedOperationException(); |
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} |
266 |
} catch (InterruptedException ie) { threadUnexpectedException(ie); } |
267 |
} |
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|
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/** |
270 |
* isHeldExclusively is false upon construction |
271 |
*/ |
272 |
public void testIsHeldExclusively() { |
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Mutex sync = new Mutex(); |
274 |
assertFalse(sync.isHeldExclusively()); |
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} |
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|
277 |
/** |
278 |
* acquiring released sync succeeds |
279 |
*/ |
280 |
public void testAcquire() { |
281 |
Mutex sync = new Mutex(); |
282 |
sync.acquire(); |
283 |
assertTrue(sync.isHeldExclusively()); |
284 |
sync.release(); |
285 |
assertFalse(sync.isHeldExclusively()); |
286 |
} |
287 |
|
288 |
/** |
289 |
* tryAcquire on a released sync succeeds |
290 |
*/ |
291 |
public void testTryAcquire() { |
292 |
Mutex sync = new Mutex(); |
293 |
assertTrue(sync.tryAcquire()); |
294 |
assertTrue(sync.isHeldExclusively()); |
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sync.release(); |
296 |
assertFalse(sync.isHeldExclusively()); |
297 |
} |
298 |
|
299 |
/** |
300 |
* hasQueuedThreads reports whether there are waiting threads |
301 |
*/ |
302 |
public void testHasQueuedThreads() { |
303 |
final Mutex sync = new Mutex(); |
304 |
assertFalse(sync.hasQueuedThreads()); |
305 |
sync.acquire(); |
306 |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
307 |
waitForQueuedThread(sync, t1); |
308 |
assertTrue(sync.hasQueuedThreads()); |
309 |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
310 |
waitForQueuedThread(sync, t2); |
311 |
assertTrue(sync.hasQueuedThreads()); |
312 |
t1.interrupt(); |
313 |
awaitTermination(t1); |
314 |
assertTrue(sync.hasQueuedThreads()); |
315 |
sync.release(); |
316 |
awaitTermination(t2); |
317 |
assertFalse(sync.hasQueuedThreads()); |
318 |
} |
319 |
|
320 |
/** |
321 |
* isQueued(null) throws NullPointerException |
322 |
*/ |
323 |
public void testIsQueuedNPE() { |
324 |
final Mutex sync = new Mutex(); |
325 |
try { |
326 |
sync.isQueued(null); |
327 |
shouldThrow(); |
328 |
} catch (NullPointerException success) {} |
329 |
} |
330 |
|
331 |
/** |
332 |
* isQueued reports whether a thread is queued |
333 |
*/ |
334 |
public void testIsQueued() { |
335 |
final Mutex sync = new Mutex(); |
336 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
337 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
338 |
assertFalse(sync.isQueued(t1)); |
339 |
assertFalse(sync.isQueued(t2)); |
340 |
sync.acquire(); |
341 |
t1.start(); |
342 |
waitForQueuedThread(sync, t1); |
343 |
assertTrue(sync.isQueued(t1)); |
344 |
assertFalse(sync.isQueued(t2)); |
345 |
t2.start(); |
346 |
waitForQueuedThread(sync, t2); |
347 |
assertTrue(sync.isQueued(t1)); |
348 |
assertTrue(sync.isQueued(t2)); |
349 |
t1.interrupt(); |
350 |
awaitTermination(t1); |
351 |
assertFalse(sync.isQueued(t1)); |
352 |
assertTrue(sync.isQueued(t2)); |
353 |
sync.release(); |
354 |
awaitTermination(t2); |
355 |
assertFalse(sync.isQueued(t1)); |
356 |
assertFalse(sync.isQueued(t2)); |
357 |
} |
358 |
|
359 |
/** |
360 |
* getFirstQueuedThread returns first waiting thread or null if none |
361 |
*/ |
362 |
public void testGetFirstQueuedThread() { |
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final Mutex sync = new Mutex(); |
364 |
assertNull(sync.getFirstQueuedThread()); |
365 |
sync.acquire(); |
366 |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
367 |
waitForQueuedThread(sync, t1); |
368 |
assertEquals(t1, sync.getFirstQueuedThread()); |
369 |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
370 |
waitForQueuedThread(sync, t2); |
371 |
assertEquals(t1, sync.getFirstQueuedThread()); |
372 |
t1.interrupt(); |
373 |
awaitTermination(t1); |
374 |
assertEquals(t2, sync.getFirstQueuedThread()); |
375 |
sync.release(); |
376 |
awaitTermination(t2); |
377 |
assertNull(sync.getFirstQueuedThread()); |
378 |
} |
379 |
|
380 |
/** |
381 |
* hasContended reports false if no thread has ever blocked, else true |
382 |
*/ |
383 |
public void testHasContended() { |
384 |
final Mutex sync = new Mutex(); |
385 |
assertFalse(sync.hasContended()); |
386 |
sync.acquire(); |
387 |
assertFalse(sync.hasContended()); |
388 |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
389 |
waitForQueuedThread(sync, t1); |
390 |
assertTrue(sync.hasContended()); |
391 |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
392 |
waitForQueuedThread(sync, t2); |
393 |
assertTrue(sync.hasContended()); |
394 |
t1.interrupt(); |
395 |
awaitTermination(t1); |
396 |
assertTrue(sync.hasContended()); |
397 |
sync.release(); |
398 |
awaitTermination(t2); |
399 |
assertTrue(sync.hasContended()); |
400 |
} |
401 |
|
402 |
/** |
403 |
* getQueuedThreads returns all waiting threads |
404 |
*/ |
405 |
public void testGetQueuedThreads() { |
406 |
final Mutex sync = new Mutex(); |
407 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
408 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
409 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
410 |
sync.acquire(); |
411 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
412 |
t1.start(); |
413 |
waitForQueuedThread(sync, t1); |
414 |
assertHasExclusiveQueuedThreads(sync, t1); |
415 |
assertTrue(sync.getQueuedThreads().contains(t1)); |
416 |
assertFalse(sync.getQueuedThreads().contains(t2)); |
417 |
t2.start(); |
418 |
waitForQueuedThread(sync, t2); |
419 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
420 |
assertTrue(sync.getQueuedThreads().contains(t1)); |
421 |
assertTrue(sync.getQueuedThreads().contains(t2)); |
422 |
t1.interrupt(); |
423 |
awaitTermination(t1); |
424 |
assertHasExclusiveQueuedThreads(sync, t2); |
425 |
sync.release(); |
426 |
awaitTermination(t2); |
427 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
428 |
} |
429 |
|
430 |
/** |
431 |
* getExclusiveQueuedThreads returns all exclusive waiting threads |
432 |
*/ |
433 |
public void testGetExclusiveQueuedThreads() { |
434 |
final Mutex sync = new Mutex(); |
435 |
Thread t1 = new Thread(new InterruptedSyncRunnable(sync)); |
436 |
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync)); |
437 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
438 |
sync.acquire(); |
439 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
440 |
t1.start(); |
441 |
waitForQueuedThread(sync, t1); |
442 |
assertHasExclusiveQueuedThreads(sync, t1); |
443 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
444 |
assertFalse(sync.getExclusiveQueuedThreads().contains(t2)); |
445 |
t2.start(); |
446 |
waitForQueuedThread(sync, t2); |
447 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
448 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t1)); |
449 |
assertTrue(sync.getExclusiveQueuedThreads().contains(t2)); |
450 |
t1.interrupt(); |
451 |
awaitTermination(t1); |
452 |
assertHasExclusiveQueuedThreads(sync, t2); |
453 |
sync.release(); |
454 |
awaitTermination(t2); |
455 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
456 |
} |
457 |
|
458 |
/** |
459 |
* getSharedQueuedThreads does not include exclusively waiting threads |
460 |
*/ |
461 |
public void testGetSharedQueuedThreads_Exclusive() { |
462 |
final Mutex sync = new Mutex(); |
463 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
464 |
sync.acquire(); |
465 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
466 |
Thread t1 = newStartedThread(new InterruptedSyncRunnable(sync)); |
467 |
waitForQueuedThread(sync, t1); |
468 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
469 |
Thread t2 = newStartedThread(new InterruptibleSyncRunnable(sync)); |
470 |
waitForQueuedThread(sync, t2); |
471 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
472 |
t1.interrupt(); |
473 |
awaitTermination(t1); |
474 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
475 |
sync.release(); |
476 |
awaitTermination(t2); |
477 |
assertTrue(sync.getSharedQueuedThreads().isEmpty()); |
478 |
} |
479 |
|
480 |
/** |
481 |
* getSharedQueuedThreads returns all shared waiting threads |
482 |
*/ |
483 |
public void testGetSharedQueuedThreads_Shared() { |
484 |
final BooleanLatch l = new BooleanLatch(); |
485 |
assertHasSharedQueuedThreads(l, NO_THREADS); |
486 |
Thread t1 = newStartedThread(new CheckedInterruptedRunnable() { |
487 |
public void realRun() throws InterruptedException { |
488 |
l.acquireSharedInterruptibly(0); |
489 |
}}); |
490 |
waitForQueuedThread(l, t1); |
491 |
assertHasSharedQueuedThreads(l, t1); |
492 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
493 |
public void realRun() throws InterruptedException { |
494 |
l.acquireSharedInterruptibly(0); |
495 |
}}); |
496 |
waitForQueuedThread(l, t2); |
497 |
assertHasSharedQueuedThreads(l, t1, t2); |
498 |
t1.interrupt(); |
499 |
awaitTermination(t1); |
500 |
assertHasSharedQueuedThreads(l, t2); |
501 |
assertTrue(l.releaseShared(0)); |
502 |
awaitTermination(t2); |
503 |
assertHasSharedQueuedThreads(l, NO_THREADS); |
504 |
} |
505 |
|
506 |
/** |
507 |
* tryAcquireNanos is interruptible |
508 |
*/ |
509 |
public void testTryAcquireNanos_Interruptible() { |
510 |
final Mutex sync = new Mutex(); |
511 |
sync.acquire(); |
512 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
513 |
public void realRun() throws InterruptedException { |
514 |
sync.tryAcquireNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS)); |
515 |
}}); |
516 |
|
517 |
waitForQueuedThread(sync, t); |
518 |
t.interrupt(); |
519 |
awaitTermination(t); |
520 |
} |
521 |
|
522 |
/** |
523 |
* tryAcquire on exclusively held sync fails |
524 |
*/ |
525 |
public void testTryAcquireWhenSynced() { |
526 |
final Mutex sync = new Mutex(); |
527 |
sync.acquire(); |
528 |
Thread t = newStartedThread(new CheckedRunnable() { |
529 |
public void realRun() { |
530 |
assertFalse(sync.tryAcquire()); |
531 |
}}); |
532 |
|
533 |
awaitTermination(t); |
534 |
sync.release(); |
535 |
} |
536 |
|
537 |
/** |
538 |
* tryAcquireNanos on an exclusively held sync times out |
539 |
*/ |
540 |
public void testAcquireNanos_Timeout() { |
541 |
final Mutex sync = new Mutex(); |
542 |
sync.acquire(); |
543 |
Thread t = newStartedThread(new CheckedRunnable() { |
544 |
public void realRun() throws InterruptedException { |
545 |
long startTime = System.nanoTime(); |
546 |
long nanos = MILLISECONDS.toNanos(timeoutMillis()); |
547 |
assertFalse(sync.tryAcquireNanos(nanos)); |
548 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
549 |
}}); |
550 |
|
551 |
awaitTermination(t); |
552 |
sync.release(); |
553 |
} |
554 |
|
555 |
/** |
556 |
* getState is true when acquired and false when not |
557 |
*/ |
558 |
public void testGetState() { |
559 |
final Mutex sync = new Mutex(); |
560 |
sync.acquire(); |
561 |
assertTrue(sync.isHeldExclusively()); |
562 |
sync.release(); |
563 |
assertFalse(sync.isHeldExclusively()); |
564 |
|
565 |
final BooleanLatch acquired = new BooleanLatch(); |
566 |
final BooleanLatch done = new BooleanLatch(); |
567 |
Thread t = newStartedThread(new CheckedRunnable() { |
568 |
public void realRun() throws InterruptedException { |
569 |
sync.acquire(); |
570 |
assertTrue(acquired.releaseShared(0)); |
571 |
done.acquireShared(0); |
572 |
sync.release(); |
573 |
}}); |
574 |
|
575 |
acquired.acquireShared(0); |
576 |
assertTrue(sync.isHeldExclusively()); |
577 |
assertTrue(done.releaseShared(0)); |
578 |
awaitTermination(t); |
579 |
assertFalse(sync.isHeldExclusively()); |
580 |
} |
581 |
|
582 |
/** |
583 |
* acquireInterruptibly succeeds when released, else is interruptible |
584 |
*/ |
585 |
public void testAcquireInterruptibly() throws InterruptedException { |
586 |
final Mutex sync = new Mutex(); |
587 |
final BooleanLatch threadStarted = new BooleanLatch(); |
588 |
sync.acquireInterruptibly(); |
589 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
590 |
public void realRun() throws InterruptedException { |
591 |
assertTrue(threadStarted.releaseShared(0)); |
592 |
sync.acquireInterruptibly(); |
593 |
}}); |
594 |
|
595 |
threadStarted.acquireShared(0); |
596 |
waitForQueuedThread(sync, t); |
597 |
t.interrupt(); |
598 |
awaitTermination(t); |
599 |
assertTrue(sync.isHeldExclusively()); |
600 |
} |
601 |
|
602 |
/** |
603 |
* owns is true for a condition created by sync else false |
604 |
*/ |
605 |
public void testOwns() { |
606 |
final Mutex sync = new Mutex(); |
607 |
final ConditionObject c = sync.newCondition(); |
608 |
final Mutex sync2 = new Mutex(); |
609 |
assertTrue(sync.owns(c)); |
610 |
assertFalse(sync2.owns(c)); |
611 |
} |
612 |
|
613 |
/** |
614 |
* Calling await without holding sync throws IllegalMonitorStateException |
615 |
*/ |
616 |
public void testAwait_IMSE() { |
617 |
final Mutex sync = new Mutex(); |
618 |
final ConditionObject c = sync.newCondition(); |
619 |
for (AwaitMethod awaitMethod : AwaitMethod.values()) { |
620 |
long startTime = System.nanoTime(); |
621 |
try { |
622 |
await(c, awaitMethod); |
623 |
shouldThrow(); |
624 |
} catch (IllegalMonitorStateException success) { |
625 |
} catch (InterruptedException e) { threadUnexpectedException(e); } |
626 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
627 |
} |
628 |
} |
629 |
|
630 |
/** |
631 |
* Calling signal without holding sync throws IllegalMonitorStateException |
632 |
*/ |
633 |
public void testSignal_IMSE() { |
634 |
final Mutex sync = new Mutex(); |
635 |
final ConditionObject c = sync.newCondition(); |
636 |
try { |
637 |
c.signal(); |
638 |
shouldThrow(); |
639 |
} catch (IllegalMonitorStateException success) {} |
640 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
641 |
} |
642 |
|
643 |
/** |
644 |
* Calling signalAll without holding sync throws IllegalMonitorStateException |
645 |
*/ |
646 |
public void testSignalAll_IMSE() { |
647 |
final Mutex sync = new Mutex(); |
648 |
final ConditionObject c = sync.newCondition(); |
649 |
try { |
650 |
c.signalAll(); |
651 |
shouldThrow(); |
652 |
} catch (IllegalMonitorStateException success) {} |
653 |
} |
654 |
|
655 |
/** |
656 |
* await/awaitNanos/awaitUntil without a signal times out |
657 |
*/ |
658 |
public void testAwaitTimed_Timeout() { testAwait_Timeout(AwaitMethod.awaitTimed); } |
659 |
public void testAwaitNanos_Timeout() { testAwait_Timeout(AwaitMethod.awaitNanos); } |
660 |
public void testAwaitUntil_Timeout() { testAwait_Timeout(AwaitMethod.awaitUntil); } |
661 |
public void testAwait_Timeout(AwaitMethod awaitMethod) { |
662 |
final Mutex sync = new Mutex(); |
663 |
final ConditionObject c = sync.newCondition(); |
664 |
sync.acquire(); |
665 |
assertAwaitTimesOut(c, awaitMethod); |
666 |
sync.release(); |
667 |
} |
668 |
|
669 |
/** |
670 |
* await/awaitNanos/awaitUntil returns when signalled |
671 |
*/ |
672 |
public void testSignal_await() { testSignal(AwaitMethod.await); } |
673 |
public void testSignal_awaitTimed() { testSignal(AwaitMethod.awaitTimed); } |
674 |
public void testSignal_awaitNanos() { testSignal(AwaitMethod.awaitNanos); } |
675 |
public void testSignal_awaitUntil() { testSignal(AwaitMethod.awaitUntil); } |
676 |
public void testSignal(final AwaitMethod awaitMethod) { |
677 |
final Mutex sync = new Mutex(); |
678 |
final ConditionObject c = sync.newCondition(); |
679 |
final BooleanLatch acquired = new BooleanLatch(); |
680 |
Thread t = newStartedThread(new CheckedRunnable() { |
681 |
public void realRun() throws InterruptedException { |
682 |
sync.acquire(); |
683 |
assertTrue(acquired.releaseShared(0)); |
684 |
await(c, awaitMethod); |
685 |
sync.release(); |
686 |
}}); |
687 |
|
688 |
acquired.acquireShared(0); |
689 |
sync.acquire(); |
690 |
assertHasWaitersLocked(sync, c, t); |
691 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
692 |
c.signal(); |
693 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
694 |
assertHasExclusiveQueuedThreads(sync, t); |
695 |
sync.release(); |
696 |
awaitTermination(t); |
697 |
} |
698 |
|
699 |
/** |
700 |
* hasWaiters(null) throws NullPointerException |
701 |
*/ |
702 |
public void testHasWaitersNPE() { |
703 |
final Mutex sync = new Mutex(); |
704 |
try { |
705 |
sync.hasWaiters(null); |
706 |
shouldThrow(); |
707 |
} catch (NullPointerException success) {} |
708 |
} |
709 |
|
710 |
/** |
711 |
* getWaitQueueLength(null) throws NullPointerException |
712 |
*/ |
713 |
public void testGetWaitQueueLengthNPE() { |
714 |
final Mutex sync = new Mutex(); |
715 |
try { |
716 |
sync.getWaitQueueLength(null); |
717 |
shouldThrow(); |
718 |
} catch (NullPointerException success) {} |
719 |
} |
720 |
|
721 |
/** |
722 |
* getWaitingThreads throws NPE if null |
723 |
*/ |
724 |
public void testGetWaitingThreadsNPE() { |
725 |
final Mutex sync = new Mutex(); |
726 |
try { |
727 |
sync.getWaitingThreads(null); |
728 |
shouldThrow(); |
729 |
} catch (NullPointerException success) {} |
730 |
} |
731 |
|
732 |
/** |
733 |
* hasWaiters throws IllegalArgumentException if not owned |
734 |
*/ |
735 |
public void testHasWaitersIAE() { |
736 |
final Mutex sync = new Mutex(); |
737 |
final ConditionObject c = sync.newCondition(); |
738 |
final Mutex sync2 = new Mutex(); |
739 |
try { |
740 |
sync2.hasWaiters(c); |
741 |
shouldThrow(); |
742 |
} catch (IllegalArgumentException success) {} |
743 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
744 |
} |
745 |
|
746 |
/** |
747 |
* hasWaiters throws IllegalMonitorStateException if not synced |
748 |
*/ |
749 |
public void testHasWaitersIMSE() { |
750 |
final Mutex sync = new Mutex(); |
751 |
final ConditionObject c = sync.newCondition(); |
752 |
try { |
753 |
sync.hasWaiters(c); |
754 |
shouldThrow(); |
755 |
} catch (IllegalMonitorStateException success) {} |
756 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
757 |
} |
758 |
|
759 |
/** |
760 |
* getWaitQueueLength throws IllegalArgumentException if not owned |
761 |
*/ |
762 |
public void testGetWaitQueueLengthIAE() { |
763 |
final Mutex sync = new Mutex(); |
764 |
final ConditionObject c = sync.newCondition(); |
765 |
final Mutex sync2 = new Mutex(); |
766 |
try { |
767 |
sync2.getWaitQueueLength(c); |
768 |
shouldThrow(); |
769 |
} catch (IllegalArgumentException success) {} |
770 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
771 |
} |
772 |
|
773 |
/** |
774 |
* getWaitQueueLength throws IllegalMonitorStateException if not synced |
775 |
*/ |
776 |
public void testGetWaitQueueLengthIMSE() { |
777 |
final Mutex sync = new Mutex(); |
778 |
final ConditionObject c = sync.newCondition(); |
779 |
try { |
780 |
sync.getWaitQueueLength(c); |
781 |
shouldThrow(); |
782 |
} catch (IllegalMonitorStateException success) {} |
783 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
784 |
} |
785 |
|
786 |
/** |
787 |
* getWaitingThreads throws IllegalArgumentException if not owned |
788 |
*/ |
789 |
public void testGetWaitingThreadsIAE() { |
790 |
final Mutex sync = new Mutex(); |
791 |
final ConditionObject c = sync.newCondition(); |
792 |
final Mutex sync2 = new Mutex(); |
793 |
try { |
794 |
sync2.getWaitingThreads(c); |
795 |
shouldThrow(); |
796 |
} catch (IllegalArgumentException success) {} |
797 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
798 |
} |
799 |
|
800 |
/** |
801 |
* getWaitingThreads throws IllegalMonitorStateException if not synced |
802 |
*/ |
803 |
public void testGetWaitingThreadsIMSE() { |
804 |
final Mutex sync = new Mutex(); |
805 |
final ConditionObject c = sync.newCondition(); |
806 |
try { |
807 |
sync.getWaitingThreads(c); |
808 |
shouldThrow(); |
809 |
} catch (IllegalMonitorStateException success) {} |
810 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
811 |
} |
812 |
|
813 |
/** |
814 |
* hasWaiters returns true when a thread is waiting, else false |
815 |
*/ |
816 |
public void testHasWaiters() { |
817 |
final Mutex sync = new Mutex(); |
818 |
final ConditionObject c = sync.newCondition(); |
819 |
final BooleanLatch acquired = new BooleanLatch(); |
820 |
Thread t = newStartedThread(new CheckedRunnable() { |
821 |
public void realRun() throws InterruptedException { |
822 |
sync.acquire(); |
823 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
824 |
assertFalse(sync.hasWaiters(c)); |
825 |
assertTrue(acquired.releaseShared(0)); |
826 |
c.await(); |
827 |
sync.release(); |
828 |
}}); |
829 |
|
830 |
acquired.acquireShared(0); |
831 |
sync.acquire(); |
832 |
assertHasWaitersLocked(sync, c, t); |
833 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
834 |
assertTrue(sync.hasWaiters(c)); |
835 |
c.signal(); |
836 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
837 |
assertHasExclusiveQueuedThreads(sync, t); |
838 |
assertFalse(sync.hasWaiters(c)); |
839 |
sync.release(); |
840 |
|
841 |
awaitTermination(t); |
842 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
843 |
} |
844 |
|
845 |
/** |
846 |
* getWaitQueueLength returns number of waiting threads |
847 |
*/ |
848 |
public void testGetWaitQueueLength() { |
849 |
final Mutex sync = new Mutex(); |
850 |
final ConditionObject c = sync.newCondition(); |
851 |
final BooleanLatch acquired1 = new BooleanLatch(); |
852 |
final BooleanLatch acquired2 = new BooleanLatch(); |
853 |
final Thread t1 = newStartedThread(new CheckedRunnable() { |
854 |
public void realRun() throws InterruptedException { |
855 |
sync.acquire(); |
856 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
857 |
assertEquals(0, sync.getWaitQueueLength(c)); |
858 |
assertTrue(acquired1.releaseShared(0)); |
859 |
c.await(); |
860 |
sync.release(); |
861 |
}}); |
862 |
acquired1.acquireShared(0); |
863 |
sync.acquire(); |
864 |
assertHasWaitersLocked(sync, c, t1); |
865 |
assertEquals(1, sync.getWaitQueueLength(c)); |
866 |
sync.release(); |
867 |
|
868 |
final Thread t2 = newStartedThread(new CheckedRunnable() { |
869 |
public void realRun() throws InterruptedException { |
870 |
sync.acquire(); |
871 |
assertHasWaitersLocked(sync, c, t1); |
872 |
assertEquals(1, sync.getWaitQueueLength(c)); |
873 |
assertTrue(acquired2.releaseShared(0)); |
874 |
c.await(); |
875 |
sync.release(); |
876 |
}}); |
877 |
acquired2.acquireShared(0); |
878 |
sync.acquire(); |
879 |
assertHasWaitersLocked(sync, c, t1, t2); |
880 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
881 |
assertEquals(2, sync.getWaitQueueLength(c)); |
882 |
c.signalAll(); |
883 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
884 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
885 |
assertEquals(0, sync.getWaitQueueLength(c)); |
886 |
sync.release(); |
887 |
|
888 |
awaitTermination(t1); |
889 |
awaitTermination(t2); |
890 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
891 |
} |
892 |
|
893 |
/** |
894 |
* getWaitingThreads returns only and all waiting threads |
895 |
*/ |
896 |
public void testGetWaitingThreads() { |
897 |
final Mutex sync = new Mutex(); |
898 |
final ConditionObject c = sync.newCondition(); |
899 |
final BooleanLatch acquired1 = new BooleanLatch(); |
900 |
final BooleanLatch acquired2 = new BooleanLatch(); |
901 |
final Thread t1 = new Thread(new CheckedRunnable() { |
902 |
public void realRun() throws InterruptedException { |
903 |
sync.acquire(); |
904 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
905 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
906 |
assertTrue(acquired1.releaseShared(0)); |
907 |
c.await(); |
908 |
sync.release(); |
909 |
}}); |
910 |
|
911 |
final Thread t2 = new Thread(new CheckedRunnable() { |
912 |
public void realRun() throws InterruptedException { |
913 |
sync.acquire(); |
914 |
assertHasWaitersLocked(sync, c, t1); |
915 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
916 |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
917 |
assertEquals(1, sync.getWaitingThreads(c).size()); |
918 |
assertTrue(acquired2.releaseShared(0)); |
919 |
c.await(); |
920 |
sync.release(); |
921 |
}}); |
922 |
|
923 |
sync.acquire(); |
924 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
925 |
assertFalse(sync.getWaitingThreads(c).contains(t1)); |
926 |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
927 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
928 |
assertEquals(0, sync.getWaitingThreads(c).size()); |
929 |
sync.release(); |
930 |
|
931 |
t1.start(); |
932 |
acquired1.acquireShared(0); |
933 |
sync.acquire(); |
934 |
assertHasWaitersLocked(sync, c, t1); |
935 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
936 |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
937 |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
938 |
assertEquals(1, sync.getWaitingThreads(c).size()); |
939 |
sync.release(); |
940 |
|
941 |
t2.start(); |
942 |
acquired2.acquireShared(0); |
943 |
sync.acquire(); |
944 |
assertHasWaitersLocked(sync, c, t1, t2); |
945 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
946 |
assertTrue(sync.getWaitingThreads(c).contains(t1)); |
947 |
assertTrue(sync.getWaitingThreads(c).contains(t2)); |
948 |
assertFalse(sync.getWaitingThreads(c).isEmpty()); |
949 |
assertEquals(2, sync.getWaitingThreads(c).size()); |
950 |
c.signalAll(); |
951 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
952 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
953 |
assertFalse(sync.getWaitingThreads(c).contains(t1)); |
954 |
assertFalse(sync.getWaitingThreads(c).contains(t2)); |
955 |
assertTrue(sync.getWaitingThreads(c).isEmpty()); |
956 |
assertEquals(0, sync.getWaitingThreads(c).size()); |
957 |
sync.release(); |
958 |
|
959 |
awaitTermination(t1); |
960 |
awaitTermination(t2); |
961 |
assertHasWaitersUnlocked(sync, c, NO_THREADS); |
962 |
} |
963 |
|
964 |
/** |
965 |
* awaitUninterruptibly is uninterruptible |
966 |
*/ |
967 |
public void testAwaitUninterruptibly() { |
968 |
final Mutex sync = new Mutex(); |
969 |
final ConditionObject condition = sync.newCondition(); |
970 |
final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
971 |
Thread t = newStartedThread(new CheckedRunnable() { |
972 |
public void realRun() { |
973 |
sync.acquire(); |
974 |
assertTrue(pleaseInterrupt.releaseShared(0)); |
975 |
condition.awaitUninterruptibly(); |
976 |
assertTrue(Thread.interrupted()); |
977 |
assertHasWaitersLocked(sync, condition, NO_THREADS); |
978 |
sync.release(); |
979 |
}}); |
980 |
|
981 |
pleaseInterrupt.acquireShared(0); |
982 |
sync.acquire(); |
983 |
assertHasWaitersLocked(sync, condition, t); |
984 |
sync.release(); |
985 |
t.interrupt(); |
986 |
assertHasWaitersUnlocked(sync, condition, t); |
987 |
assertThreadBlocks(t, Thread.State.WAITING); |
988 |
sync.acquire(); |
989 |
assertHasWaitersLocked(sync, condition, t); |
990 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
991 |
condition.signal(); |
992 |
assertHasWaitersLocked(sync, condition, NO_THREADS); |
993 |
assertHasExclusiveQueuedThreads(sync, t); |
994 |
sync.release(); |
995 |
awaitTermination(t); |
996 |
} |
997 |
|
998 |
/** |
999 |
* await/awaitNanos/awaitUntil is interruptible |
1000 |
*/ |
1001 |
public void testInterruptible_await() { testInterruptible(AwaitMethod.await); } |
1002 |
public void testInterruptible_awaitTimed() { testInterruptible(AwaitMethod.awaitTimed); } |
1003 |
public void testInterruptible_awaitNanos() { testInterruptible(AwaitMethod.awaitNanos); } |
1004 |
public void testInterruptible_awaitUntil() { testInterruptible(AwaitMethod.awaitUntil); } |
1005 |
public void testInterruptible(final AwaitMethod awaitMethod) { |
1006 |
final Mutex sync = new Mutex(); |
1007 |
final ConditionObject c = sync.newCondition(); |
1008 |
final BooleanLatch pleaseInterrupt = new BooleanLatch(); |
1009 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1010 |
public void realRun() throws InterruptedException { |
1011 |
sync.acquire(); |
1012 |
assertTrue(pleaseInterrupt.releaseShared(0)); |
1013 |
await(c, awaitMethod); |
1014 |
}}); |
1015 |
|
1016 |
pleaseInterrupt.acquireShared(0); |
1017 |
t.interrupt(); |
1018 |
awaitTermination(t); |
1019 |
} |
1020 |
|
1021 |
/** |
1022 |
* signalAll wakes up all threads |
1023 |
*/ |
1024 |
public void testSignalAll_await() { testSignalAll(AwaitMethod.await); } |
1025 |
public void testSignalAll_awaitTimed() { testSignalAll(AwaitMethod.awaitTimed); } |
1026 |
public void testSignalAll_awaitNanos() { testSignalAll(AwaitMethod.awaitNanos); } |
1027 |
public void testSignalAll_awaitUntil() { testSignalAll(AwaitMethod.awaitUntil); } |
1028 |
public void testSignalAll(final AwaitMethod awaitMethod) { |
1029 |
final Mutex sync = new Mutex(); |
1030 |
final ConditionObject c = sync.newCondition(); |
1031 |
final BooleanLatch acquired1 = new BooleanLatch(); |
1032 |
final BooleanLatch acquired2 = new BooleanLatch(); |
1033 |
Thread t1 = newStartedThread(new CheckedRunnable() { |
1034 |
public void realRun() throws InterruptedException { |
1035 |
sync.acquire(); |
1036 |
acquired1.releaseShared(0); |
1037 |
await(c, awaitMethod); |
1038 |
sync.release(); |
1039 |
}}); |
1040 |
|
1041 |
Thread t2 = newStartedThread(new CheckedRunnable() { |
1042 |
public void realRun() throws InterruptedException { |
1043 |
sync.acquire(); |
1044 |
acquired2.releaseShared(0); |
1045 |
await(c, awaitMethod); |
1046 |
sync.release(); |
1047 |
}}); |
1048 |
|
1049 |
acquired1.acquireShared(0); |
1050 |
acquired2.acquireShared(0); |
1051 |
sync.acquire(); |
1052 |
assertHasWaitersLocked(sync, c, t1, t2); |
1053 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1054 |
c.signalAll(); |
1055 |
assertHasWaitersLocked(sync, c, NO_THREADS); |
1056 |
assertHasExclusiveQueuedThreads(sync, t1, t2); |
1057 |
sync.release(); |
1058 |
awaitTermination(t1); |
1059 |
awaitTermination(t2); |
1060 |
} |
1061 |
|
1062 |
/** |
1063 |
* toString indicates current state |
1064 |
*/ |
1065 |
public void testToString() { |
1066 |
Mutex sync = new Mutex(); |
1067 |
assertTrue(sync.toString().contains("State = " + Mutex.UNLOCKED)); |
1068 |
sync.acquire(); |
1069 |
assertTrue(sync.toString().contains("State = " + Mutex.LOCKED)); |
1070 |
} |
1071 |
|
1072 |
/** |
1073 |
* A serialized AQS deserializes with current state, but no queued threads |
1074 |
*/ |
1075 |
public void testSerialization() { |
1076 |
Mutex sync = new Mutex(); |
1077 |
assertFalse(serialClone(sync).isHeldExclusively()); |
1078 |
sync.acquire(); |
1079 |
Thread t = newStartedThread(new InterruptedSyncRunnable(sync)); |
1080 |
waitForQueuedThread(sync, t); |
1081 |
assertTrue(sync.isHeldExclusively()); |
1082 |
|
1083 |
Mutex clone = serialClone(sync); |
1084 |
assertTrue(clone.isHeldExclusively()); |
1085 |
assertHasExclusiveQueuedThreads(sync, t); |
1086 |
assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
1087 |
t.interrupt(); |
1088 |
awaitTermination(t); |
1089 |
sync.release(); |
1090 |
assertFalse(sync.isHeldExclusively()); |
1091 |
assertTrue(clone.isHeldExclusively()); |
1092 |
assertHasExclusiveQueuedThreads(sync, NO_THREADS); |
1093 |
assertHasExclusiveQueuedThreads(clone, NO_THREADS); |
1094 |
} |
1095 |
|
1096 |
/** |
1097 |
* tryReleaseShared setting state changes getState |
1098 |
*/ |
1099 |
public void testGetStateWithReleaseShared() { |
1100 |
final BooleanLatch l = new BooleanLatch(); |
1101 |
assertFalse(l.isSignalled()); |
1102 |
assertTrue(l.releaseShared(0)); |
1103 |
assertTrue(l.isSignalled()); |
1104 |
} |
1105 |
|
1106 |
/** |
1107 |
* releaseShared has no effect when already signalled |
1108 |
*/ |
1109 |
public void testReleaseShared() { |
1110 |
final BooleanLatch l = new BooleanLatch(); |
1111 |
assertFalse(l.isSignalled()); |
1112 |
assertTrue(l.releaseShared(0)); |
1113 |
assertTrue(l.isSignalled()); |
1114 |
assertTrue(l.releaseShared(0)); |
1115 |
assertTrue(l.isSignalled()); |
1116 |
} |
1117 |
|
1118 |
/** |
1119 |
* acquireSharedInterruptibly returns after release, but not before |
1120 |
*/ |
1121 |
public void testAcquireSharedInterruptibly() { |
1122 |
final BooleanLatch l = new BooleanLatch(); |
1123 |
|
1124 |
Thread t = newStartedThread(new CheckedRunnable() { |
1125 |
public void realRun() throws InterruptedException { |
1126 |
assertFalse(l.isSignalled()); |
1127 |
l.acquireSharedInterruptibly(0); |
1128 |
assertTrue(l.isSignalled()); |
1129 |
l.acquireSharedInterruptibly(0); |
1130 |
assertTrue(l.isSignalled()); |
1131 |
}}); |
1132 |
|
1133 |
waitForQueuedThread(l, t); |
1134 |
assertFalse(l.isSignalled()); |
1135 |
assertThreadBlocks(t, Thread.State.WAITING); |
1136 |
assertHasSharedQueuedThreads(l, t); |
1137 |
assertTrue(l.releaseShared(0)); |
1138 |
assertTrue(l.isSignalled()); |
1139 |
awaitTermination(t); |
1140 |
} |
1141 |
|
1142 |
/** |
1143 |
* tryAcquireSharedNanos returns after release, but not before |
1144 |
*/ |
1145 |
public void testTryAcquireSharedNanos() { |
1146 |
final BooleanLatch l = new BooleanLatch(); |
1147 |
|
1148 |
Thread t = newStartedThread(new CheckedRunnable() { |
1149 |
public void realRun() throws InterruptedException { |
1150 |
assertFalse(l.isSignalled()); |
1151 |
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1152 |
assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
1153 |
assertTrue(l.isSignalled()); |
1154 |
assertTrue(l.tryAcquireSharedNanos(0, nanos)); |
1155 |
assertTrue(l.isSignalled()); |
1156 |
}}); |
1157 |
|
1158 |
waitForQueuedThread(l, t); |
1159 |
assertFalse(l.isSignalled()); |
1160 |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
1161 |
assertTrue(l.releaseShared(0)); |
1162 |
assertTrue(l.isSignalled()); |
1163 |
awaitTermination(t); |
1164 |
} |
1165 |
|
1166 |
/** |
1167 |
* acquireSharedInterruptibly is interruptible |
1168 |
*/ |
1169 |
public void testAcquireSharedInterruptibly_Interruptible() { |
1170 |
final BooleanLatch l = new BooleanLatch(); |
1171 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1172 |
public void realRun() throws InterruptedException { |
1173 |
assertFalse(l.isSignalled()); |
1174 |
l.acquireSharedInterruptibly(0); |
1175 |
}}); |
1176 |
|
1177 |
waitForQueuedThread(l, t); |
1178 |
assertFalse(l.isSignalled()); |
1179 |
t.interrupt(); |
1180 |
awaitTermination(t); |
1181 |
assertFalse(l.isSignalled()); |
1182 |
} |
1183 |
|
1184 |
/** |
1185 |
* tryAcquireSharedNanos is interruptible |
1186 |
*/ |
1187 |
public void testTryAcquireSharedNanos_Interruptible() { |
1188 |
final BooleanLatch l = new BooleanLatch(); |
1189 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
1190 |
public void realRun() throws InterruptedException { |
1191 |
assertFalse(l.isSignalled()); |
1192 |
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
1193 |
l.tryAcquireSharedNanos(0, nanos); |
1194 |
}}); |
1195 |
|
1196 |
waitForQueuedThread(l, t); |
1197 |
assertFalse(l.isSignalled()); |
1198 |
t.interrupt(); |
1199 |
awaitTermination(t); |
1200 |
assertFalse(l.isSignalled()); |
1201 |
} |
1202 |
|
1203 |
/** |
1204 |
* tryAcquireSharedNanos times out if not released before timeout |
1205 |
*/ |
1206 |
public void testTryAcquireSharedNanos_Timeout() { |
1207 |
final BooleanLatch l = new BooleanLatch(); |
1208 |
final BooleanLatch observedQueued = new BooleanLatch(); |
1209 |
Thread t = newStartedThread(new CheckedRunnable() { |
1210 |
public void realRun() throws InterruptedException { |
1211 |
assertFalse(l.isSignalled()); |
1212 |
for (long millis = timeoutMillis(); |
1213 |
!observedQueued.isSignalled(); |
1214 |
millis *= 2) { |
1215 |
long nanos = MILLISECONDS.toNanos(millis); |
1216 |
long startTime = System.nanoTime(); |
1217 |
assertFalse(l.tryAcquireSharedNanos(0, nanos)); |
1218 |
assertTrue(millisElapsedSince(startTime) >= millis); |
1219 |
} |
1220 |
assertFalse(l.isSignalled()); |
1221 |
}}); |
1222 |
|
1223 |
waitForQueuedThread(l, t); |
1224 |
observedQueued.releaseShared(0); |
1225 |
assertFalse(l.isSignalled()); |
1226 |
awaitTermination(t); |
1227 |
assertFalse(l.isSignalled()); |
1228 |
} |
1229 |
|
1230 |
/** |
1231 |
* awaitNanos/timed await with 0 wait times out immediately |
1232 |
*/ |
1233 |
public void testAwait_Zero() throws InterruptedException { |
1234 |
final Mutex sync = new Mutex(); |
1235 |
final ConditionObject c = sync.newCondition(); |
1236 |
sync.acquire(); |
1237 |
assertTrue(c.awaitNanos(0L) <= 0); |
1238 |
assertFalse(c.await(0L, NANOSECONDS)); |
1239 |
sync.release(); |
1240 |
} |
1241 |
|
1242 |
/** |
1243 |
* awaitNanos/timed await with maximum negative wait times does not underflow |
1244 |
*/ |
1245 |
public void testAwait_NegativeInfinity() throws InterruptedException { |
1246 |
final Mutex sync = new Mutex(); |
1247 |
final ConditionObject c = sync.newCondition(); |
1248 |
sync.acquire(); |
1249 |
assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0); |
1250 |
assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS)); |
1251 |
sync.release(); |
1252 |
} |
1253 |
|
1254 |
} |