Adds elements from the list to the table
Moves the contents of matrix down by the number of purged rows and resizes the
matrix accordingly. T
Returns the total capacity in the matrix
Computes and returns the index within a row for seqno
Computes and returns the row index for seqno. The caller must hold the lock.
Iterate from low to hr and add up non-null values. Caller must hold the lock.
Iterates over the matrix with range [from .. to] (including from and to), and
Returns an element at seqno