Returns true if the worker labeled with index with a total of
total workers should go left at level level.
Which node the stealer takes at this level.
Which node the victim takes at this level.
Returns true iff the worker should first go left at this level of the tree top.
Finds work in the tree for the given worker, which is one out of total workers.
Finds work in the tree for the given worker, which is one out of total workers.
This search may include stealing work.
Returns true iff the level of the tree is such that: 2^level < total