/** awaitUninterruptibly is uninterruptible */
public void testAwaitUninterruptibly() {
final Mutex sync = new Mutex();
final ConditionObject c = sync.newCondition();
final BooleanLatch pleaseInterrupt = new BooleanLatch();
Thread t =
newStartedThread(
new CheckedRunnable() {
public void realRun() {
sync.acquire();
assertTrue(pleaseInterrupt.releaseShared(0));
c.awaitUninterruptibly();
assertTrue(Thread.interrupted());
assertHasWaitersLocked(sync, c, NO_THREADS);
sync.release();
}
});
pleaseInterrupt.acquireShared(0);
sync.acquire();
assertHasWaitersLocked(sync, c, t);
sync.release();
t.interrupt();
assertHasWaitersUnlocked(sync, c, t);
assertThreadStaysAlive(t);
sync.acquire();
assertHasWaitersLocked(sync, c, t);
assertHasExclusiveQueuedThreads(sync, NO_THREADS);
c.signal();
assertHasWaitersLocked(sync, c, NO_THREADS);
assertHasExclusiveQueuedThreads(sync, t);
sync.release();
awaitTermination(t);
}
/** hasWaiters returns true when a thread is waiting, else false */
public void testHasWaiters() {
final Mutex sync = new Mutex();
final ConditionObject c = sync.newCondition();
final BooleanLatch acquired = new BooleanLatch();
Thread t =
newStartedThread(
new CheckedRunnable() {
public void realRun() throws InterruptedException {
sync.acquire();
assertHasWaitersLocked(sync, c, NO_THREADS);
assertFalse(sync.hasWaiters(c));
assertTrue(acquired.releaseShared(0));
c.await();
sync.release();
}
});
acquired.acquireShared(0);
sync.acquire();
assertHasWaitersLocked(sync, c, t);
assertHasExclusiveQueuedThreads(sync, NO_THREADS);
assertTrue(sync.hasWaiters(c));
c.signal();
assertHasWaitersLocked(sync, c, NO_THREADS);
assertHasExclusiveQueuedThreads(sync, t);
assertFalse(sync.hasWaiters(c));
sync.release();
awaitTermination(t);
assertHasWaitersUnlocked(sync, c, NO_THREADS);
}
/** Calling signalAll without holding sync throws IllegalMonitorStateException */
public void testSignalAll_IMSE() {
final Mutex sync = new Mutex();
final ConditionObject c = sync.newCondition();
try {
c.signalAll();
shouldThrow();
} catch (IllegalMonitorStateException success) {
}
}
/** Calling signal without holding sync throws IllegalMonitorStateException */
public void testSignal_IMSE() {
final Mutex sync = new Mutex();
final ConditionObject c = sync.newCondition();
try {
c.signal();
shouldThrow();
} catch (IllegalMonitorStateException success) {
}
assertHasWaitersUnlocked(sync, c, NO_THREADS);
}
/** getWaitQueueLength returns number of waiting threads */
public void testGetWaitQueueLength() {
final Mutex sync = new Mutex();
final ConditionObject c = sync.newCondition();
final BooleanLatch acquired1 = new BooleanLatch();
final BooleanLatch acquired2 = new BooleanLatch();
final Thread t1 =
newStartedThread(
new CheckedRunnable() {
public void realRun() throws InterruptedException {
sync.acquire();
assertHasWaitersLocked(sync, c, NO_THREADS);
assertEquals(0, sync.getWaitQueueLength(c));
assertTrue(acquired1.releaseShared(0));
c.await();
sync.release();
}
});
acquired1.acquireShared(0);
sync.acquire();
assertHasWaitersLocked(sync, c, t1);
assertEquals(1, sync.getWaitQueueLength(c));
sync.release();
final Thread t2 =
newStartedThread(
new CheckedRunnable() {
public void realRun() throws InterruptedException {
sync.acquire();
assertHasWaitersLocked(sync, c, t1);
assertEquals(1, sync.getWaitQueueLength(c));
assertTrue(acquired2.releaseShared(0));
c.await();
sync.release();
}
});
acquired2.acquireShared(0);
sync.acquire();
assertHasWaitersLocked(sync, c, t1, t2);
assertHasExclusiveQueuedThreads(sync, NO_THREADS);
assertEquals(2, sync.getWaitQueueLength(c));
c.signalAll();
assertHasWaitersLocked(sync, c, NO_THREADS);
assertHasExclusiveQueuedThreads(sync, t1, t2);
assertEquals(0, sync.getWaitQueueLength(c));
sync.release();
awaitTermination(t1);
awaitTermination(t2);
assertHasWaitersUnlocked(sync, c, NO_THREADS);
}
/** Awaits condition using the specified AwaitMethod. */
void await(ConditionObject c, AwaitMethod awaitMethod) throws InterruptedException {
long timeoutMillis = 2 * LONG_DELAY_MS;
switch (awaitMethod) {
case await:
c.await();
break;
case awaitTimed:
assertTrue(c.await(timeoutMillis, MILLISECONDS));
break;
case awaitNanos:
long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
long nanosRemaining = c.awaitNanos(nanosTimeout);
assertTrue(nanosRemaining > 0);
break;
case awaitUntil:
assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
break;
}
}
public void testSignalAll(final AwaitMethod awaitMethod) {
final Mutex sync = new Mutex();
final ConditionObject c = sync.newCondition();
final BooleanLatch acquired1 = new BooleanLatch();
final BooleanLatch acquired2 = new BooleanLatch();
Thread t1 =
newStartedThread(
new CheckedRunnable() {
public void realRun() throws InterruptedException {
sync.acquire();
acquired1.releaseShared(0);
await(c, awaitMethod);
sync.release();
}
});
Thread t2 =
newStartedThread(
new CheckedRunnable() {
public void realRun() throws InterruptedException {
sync.acquire();
acquired2.releaseShared(0);
await(c, awaitMethod);
sync.release();
}
});
acquired1.acquireShared(0);
acquired2.acquireShared(0);
sync.acquire();
assertHasWaitersLocked(sync, c, t1, t2);
assertHasExclusiveQueuedThreads(sync, NO_THREADS);
c.signalAll();
assertHasWaitersLocked(sync, c, NO_THREADS);
assertHasExclusiveQueuedThreads(sync, t1, t2);
sync.release();
awaitTermination(t1);
awaitTermination(t2);
}
/** Checks that awaiting the given condition times out (using the default timeout duration). */
void assertAwaitTimesOut(ConditionObject c, AwaitMethod awaitMethod) {
long timeoutMillis = timeoutMillis();
long startTime = System.nanoTime();
try {
switch (awaitMethod) {
case awaitTimed:
assertFalse(c.await(timeoutMillis, MILLISECONDS));
break;
case awaitNanos:
long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
long nanosRemaining = c.awaitNanos(nanosTimeout);
assertTrue(nanosRemaining <= 0);
break;
case awaitUntil:
assertFalse(c.awaitUntil(delayedDate(timeoutMillis)));
break;
default:
throw new UnsupportedOperationException();
}
} catch (InterruptedException ie) {
threadUnexpectedException(ie);
}
assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
}