/*** MEMCPY CALLBACKS ***/
  // Enqueues a memcpy operation onto stream, with a host destination location
  // `host_dst` and a device memory source, with target size `size`.
  void (*memcpy_dtoh)(const SP_Device* device, SP_Stream stream, void* host_dst,
                      const SP_DeviceMemoryBase* device_src, uint64_t size,
                      TF_Status* status);

// to validate and enqueue a request for the queueSet/QueueSet:
// 1) Start with shuffle sharding, to pick a queue.
// 2) Reject current request if there is not enough concurrency shares and
// we are at max queue length
// 3) If not rejected, create a request and enqueue
// returns the enqueud request on a successful enqueue
// returns nil in the case that there is no available concurrency or

	}
	return set
}

// enqueueStatefulSet enqueues the given statefulset in the work queue.
func (ssc *StatefulSetController) enqueueStatefulSet(obj interface{}) {
	key, err := controller.KeyFunc(obj)
	if err != nil {
		utilruntime.HandleError(fmt.Errorf("couldn't get key for object %+v: %v", obj, err))
		return
	}
	ssc.queue.Add(key)
}

// enqueueStatefulSet enqueues the given statefulset in the work queue after given time

			return
		}
	}
	logger.V(4).Info("Deleting deployment", "deployment", klog.KObj(d))
	dc.enqueueDeployment(d)
}

// addReplicaSet enqueues the deployment that manages a ReplicaSet when the ReplicaSet is created.
func (dc *DeploymentController) addReplicaSet(logger klog.Logger, obj interface{}) {
	rs := obj.(*apps.ReplicaSet)

	if rs.DeletionTimestamp != nil {

	w := es.workers.Load()
	if w == nil || len(*w) == 0 {
		return 0
	}
	var tasks int
	for _, wrkr := range *w {
		tasks += len(wrkr)
	}
	return tasks
}

// enqueueTierJournalEntry enqueues a tier journal entry referring to a remote
// object corresponding to a 'replaced' object versions. This applies only to
// non-versioned or version suspended buckets.
func (es *expiryState) enqueueTierJournalEntry(je jentry) {

	castNewObj := newObj.(*apiserverinternalv1alpha1.StorageVersion)
	c.enqueueStorageVersion(logger, castNewObj)
}

// enqueueStorageVersion enqueues the storage version if it has entry for invalid apiserver
func (c *Controller) enqueueStorageVersion(logger klog.Logger, obj *apiserverinternalv1alpha1.StorageVersion) {
	for _, sv := range obj.Status.StorageVersions {

    @CheckForNull Runnable nextTask;

    /** Only used by the thread associated with this object */
    @CheckForNull Executor nextExecutor;
  }

  /**
   * Enqueues a task to run when the previous task (if any) completes.
   *
   * <p>Cancellation does not propagate from the output future to a callable that has begun to

    @CheckForNull Runnable nextTask;

    /** Only used by the thread associated with this object */
    @CheckForNull Executor nextExecutor;
  }

  /**
   * Enqueues a task to run when the previous task (if any) completes.
   *
   * <p>Cancellation does not propagate from the output future to a callable that has begun to

  private WorkerRunningState workerRunningState = IDLE;

  /**
   * This counter prevents an ABA issue where a thread may successfully schedule the worker, the
   * worker runs and exhausts the queue, another thread enqueues a task and fails to schedule the
   * worker, and then the first thread's call to delegate.execute() returns. Without this counter,
   * it would observe the QUEUING state and set it to QUEUED, and the worker would never be

  private WorkerRunningState workerRunningState = IDLE;

  /**
   * This counter prevents an ABA issue where a thread may successfully schedule the worker, the
   * worker runs and exhausts the queue, another thread enqueues a task and fails to schedule the
   * worker, and then the first thread's call to delegate.execute() returns. Without this counter,
   * it would observe the QUEUING state and set it to QUEUED, and the worker would never be