/** tryAcquireSharedNanos times out if not released before timeout */
public void testTryAcquireSharedNanos_Timeout() {
final BooleanLatch l = new BooleanLatch();
final BooleanLatch observedQueued = new BooleanLatch();
final long timeoutMillis = timeoutMillis();
Thread t =
newStartedThread(
new CheckedRunnable() {
public void realRun() throws InterruptedException {
assertFalse(l.isSignalled());
for (long millis = timeoutMillis(); !observedQueued.isSignalled(); millis *= 2) {
long nanos = MILLISECONDS.toNanos(millis);
long startTime = System.nanoTime();
assertFalse(l.tryAcquireSharedNanos(0, nanos));
assertTrue(millisElapsedSince(startTime) >= millis);
}
assertFalse(l.isSignalled());
}
});
waitForQueuedThread(l, t);
observedQueued.releaseShared(0);
assertFalse(l.isSignalled());
awaitTermination(t);
assertFalse(l.isSignalled());
}
/** releaseShared has no effect when already signalled */
public void testReleaseShared() {
final BooleanLatch l = new BooleanLatch();
assertFalse(l.isSignalled());
assertTrue(l.releaseShared(0));
assertTrue(l.isSignalled());
assertTrue(l.releaseShared(0));
assertTrue(l.isSignalled());
}
/** acquireSharedInterruptibly is interruptible */
public void testAcquireSharedInterruptibly_Interruptible() {
final BooleanLatch l = new BooleanLatch();
Thread t =
newStartedThread(
new CheckedInterruptedRunnable() {
public void realRun() throws InterruptedException {
assertFalse(l.isSignalled());
l.acquireSharedInterruptibly(0);
}
});
waitForQueuedThread(l, t);
assertFalse(l.isSignalled());
t.interrupt();
awaitTermination(t);
assertFalse(l.isSignalled());
}
/** tryAcquireSharedNanos is interruptible */
public void testTryAcquireSharedNanos_Interruptible() {
final BooleanLatch l = new BooleanLatch();
Thread t =
newStartedThread(
new CheckedInterruptedRunnable() {
public void realRun() throws InterruptedException {
assertFalse(l.isSignalled());
long nanos = MILLISECONDS.toNanos(2 * LONG_DELAY_MS);
l.tryAcquireSharedNanos(0, nanos);
}
});
waitForQueuedThread(l, t);
assertFalse(l.isSignalled());
t.interrupt();
awaitTermination(t);
assertFalse(l.isSignalled());
}