ReentrantReadWriteLock readWriteLockC = factory.newReentrantReadWriteLock("ReadWriteC");
    readLockA = readWriteLockA.readLock();
    readLockB = readWriteLockB.readLock();
    readLockC = readWriteLockC.readLock();
    writeLockA = readWriteLockA.writeLock();
    writeLockB = readWriteLockB.writeLock();
    writeLockC = readWriteLockC.writeLock();

    ReentrantReadWriteLock readWriteLockC = factory.newReentrantReadWriteLock("ReadWriteC");
    readLockA = readWriteLockA.readLock();
    readLockB = readWriteLockB.readLock();
    readLockC = readWriteLockC.readLock();
    writeLockA = readWriteLockA.writeLock();
    writeLockB = readWriteLockB.writeLock();
    writeLockC = readWriteLockC.writeLock();

      super(fair);
      this.readLock = new CycleDetectingReentrantReadLock(this);
      this.writeLock = new CycleDetectingReentrantWriteLock(this);
      this.lockGraphNode = Preconditions.checkNotNull(lockGraphNode);
    }

    ///// Overridden ReentrantReadWriteLock methods. /////

    @Override
    public ReadLock readLock() {
      return readLock;
    }

    @Override

	//   connPool: A connection pool that provides database connections.
	//   locker: A synchronization lock that is unlocked after initialization to avoid deadlocks.
	// Returns:
	//   *Stmt: A newly created statement object for executing SQL operations.
	//   error: An error if the statement preparation fails.

    Object key = new Object();
    Lock readLock = striped.get(key).readLock();
    WeakReference<Object> garbage = createGarbage();
    GcFinalization.awaitClear(garbage);
    Lock writeLock = striped.get(key).writeLock();
    readLock.lock();
    try {
      assertFalse(writeLock.tryLock());
    } finally {
      readLock.unlock();
    }
  }

    Object key = new Object();
    Lock readLock = striped.get(key).readLock();
    WeakReference<Object> garbage = createGarbage();
    GcFinalization.awaitClear(garbage);
    Lock writeLock = striped.get(key).writeLock();
    readLock.lock();
    try {
      assertFalse(writeLock.tryLock());
    } finally {
      readLock.unlock();
    }
  }

@asynccontextmanager
async def contextmanager_in_threadpool(
    cm: AbstractContextManager[_T],
) -> AsyncGenerator[_T, None]:
    # blocking __exit__ from running waiting on a free thread
    # can create race conditions/deadlocks if the context manager itself
    # has its own internal pool (e.g. a database connection pool)
    # to avoid this we let __exit__ run without a capacity limit

   * setFuture(cancelledFuture)}.
   *
   * <p>Beware of completing a future while holding a lock. Its listeners may do slow work or
   * acquire other locks, risking deadlocks.
   */
  @CanIgnoreReturnValue
  @Override
  public boolean cancel(boolean mayInterruptIfRunning) {
    @RetainedLocalRef Object localValue = value();
    boolean rValue = false;

  }

  /**
   * Using this as the blocker object allows introspection and debugging tools to see that the
   * currentRunner thread is blocked on the progress of the interruptor thread, which can help
   * identify deadlocks.
   */
  @VisibleForTesting
  static final class Blocker extends AbstractOwnableSynchronizer implements Runnable {
    private final InterruptibleTask<?> task;

    private Blocker(InterruptibleTask<?> task) {

*   Fixes a heap buffer overflow in `Transpose`
    ([CVE-2021-41216](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41216))
*   Prevents deadlocks arising from mutually recursive `tf.function` objects
    ([CVE-2021-41213](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41213))
*   Fixes a null pointer exception in `DeserializeSparse`