/**
* Returns an estimate of the number of threads waiting to acquire this lock. The value is only an
* estimate because the number of threads may change dynamically while this method traverses
* internal data structures. This method is designed for use in monitoring of the system state,
* not for synchronization control.
*
* @return the estimated number of threads waiting for this lock
*/
public final int getQueueLength() {
return sync.getQueueLength();
}
