TheTorProject/ooni-probe — pull request #164 by aagbsn (2013-08-22 11:11:28+00:00)
Title: Link TaskManagers by Least Available Slots

A LinkedTaskManager only has availableSlots if its child TaskManager
also has availableSlots. Children LinkedTaskManagers must notify the
parent LinkedTaskManager when a task is complete because the task
queue is event-driven.