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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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|
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.HashSet; |
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import java.util.concurrent.locks.AbstractQueuedSynchronizer; |
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import java.util.concurrent.locks.AbstractQueuedSynchronizer.ConditionObject; |
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|
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import junit.framework.AssertionFailedError; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class AbstractQueuedSynchronizerTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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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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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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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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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(); |
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} |
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} |
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|
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*/ |
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void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) { |
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long timeoutMillis = timeoutMillis(); |
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< |
long startTime = System.nanoTime(); |
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> |
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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} |
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} catch (InterruptedException ie) { threadUnexpectedException(ie); } |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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} |
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|
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/** |
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*/ |
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public void testTryAcquireSharedNanos_Timeout() { |
1209 |
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final BooleanLatch l = new BooleanLatch(); |
1210 |
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final BooleanLatch observedQueued = new BooleanLatch(); |
1211 |
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Thread t = newStartedThread(new CheckedRunnable() { |
1212 |
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public void realRun() throws InterruptedException { |
1213 |
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assertFalse(l.isSignalled()); |
1214 |
< |
long startTime = System.nanoTime(); |
1215 |
< |
long nanos = MILLISECONDS.toNanos(timeoutMillis()); |
1216 |
< |
assertFalse(l.tryAcquireSharedNanos(0, nanos)); |
1217 |
< |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1214 |
> |
for (long millis = timeoutMillis(); |
1215 |
> |
!observedQueued.isSignalled(); |
1216 |
> |
millis *= 2) { |
1217 |
> |
long nanos = MILLISECONDS.toNanos(millis); |
1218 |
> |
long startTime = System.nanoTime(); |
1219 |
> |
assertFalse(l.tryAcquireSharedNanos(0, nanos)); |
1220 |
> |
assertTrue(millisElapsedSince(startTime) >= millis); |
1221 |
> |
} |
1222 |
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assertFalse(l.isSignalled()); |
1223 |
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}}); |
1224 |
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|
1225 |
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waitForQueuedThread(l, t); |
1226 |
+ |
observedQueued.releaseShared(0); |
1227 |
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assertFalse(l.isSignalled()); |
1228 |
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awaitTermination(t); |
1229 |
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assertFalse(l.isSignalled()); |
1230 |
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} |
1231 |
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|
1232 |
+ |
/** |
1233 |
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* awaitNanos/timed await with 0 wait times out immediately |
1234 |
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*/ |
1235 |
+ |
public void testAwait_Zero() throws InterruptedException { |
1236 |
+ |
final Mutex sync = new Mutex(); |
1237 |
+ |
final ConditionObject c = sync.newCondition(); |
1238 |
+ |
sync.acquire(); |
1239 |
+ |
assertTrue(c.awaitNanos(0L) <= 0); |
1240 |
+ |
assertFalse(c.await(0L, NANOSECONDS)); |
1241 |
+ |
sync.release(); |
1242 |
+ |
} |
1243 |
+ |
|
1244 |
+ |
/** |
1245 |
+ |
* awaitNanos/timed await with maximum negative wait times does not underflow |
1246 |
+ |
*/ |
1247 |
+ |
public void testAwait_NegativeInfinity() throws InterruptedException { |
1248 |
+ |
final Mutex sync = new Mutex(); |
1249 |
+ |
final ConditionObject c = sync.newCondition(); |
1250 |
+ |
sync.acquire(); |
1251 |
+ |
assertTrue(c.awaitNanos(Long.MIN_VALUE) <= 0); |
1252 |
+ |
assertFalse(c.await(Long.MIN_VALUE, NANOSECONDS)); |
1253 |
+ |
sync.release(); |
1254 |
+ |
} |
1255 |
+ |
|
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|
} |