/** 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);
}
/** 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);
}
/** getState is true when acquired and false when not */
public void testGetState() {
final Mutex sync = new Mutex();
sync.acquire();
assertTrue(sync.isHeldExclusively());
sync.release();
assertFalse(sync.isHeldExclusively());
final BooleanLatch acquired = new BooleanLatch();
final BooleanLatch done = new BooleanLatch();
Thread t =
newStartedThread(
new CheckedRunnable() {
public void realRun() throws InterruptedException {
sync.acquire();
assertTrue(acquired.releaseShared(0));
done.acquireShared(0);
sync.release();
}
});
acquired.acquireShared(0);
assertTrue(sync.isHeldExclusively());
assertTrue(done.releaseShared(0));
awaitTermination(t);
assertFalse(sync.isHeldExclusively());
}
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);
}
public void testInterruptible(final AwaitMethod awaitMethod) {
final Mutex sync = new Mutex();
final ConditionObject c = sync.newCondition();
final BooleanLatch pleaseInterrupt = new BooleanLatch();
Thread t =
newStartedThread(
new CheckedInterruptedRunnable() {
public void realRun() throws InterruptedException {
sync.acquire();
assertTrue(pleaseInterrupt.releaseShared(0));
await(c, awaitMethod);
}
});
pleaseInterrupt.acquireShared(0);
t.interrupt();
awaitTermination(t);
}
/** acquireInterruptibly succeeds when released, else is interruptible */
public void testAcquireInterruptibly() throws InterruptedException {
final Mutex sync = new Mutex();
final BooleanLatch threadStarted = new BooleanLatch();
sync.acquireInterruptibly();
Thread t =
newStartedThread(
new CheckedInterruptedRunnable() {
public void realRun() throws InterruptedException {
assertTrue(threadStarted.releaseShared(0));
sync.acquireInterruptibly();
}
});
threadStarted.acquireShared(0);
waitForQueuedThread(sync, t);
t.interrupt();
awaitTermination(t);
assertTrue(sync.isHeldExclusively());
}
