Tests whether or not there are elements in any InnerPQ.
Requires the EnableEmpty flag to be set to use this method. The flag
incurs a width * size_t.sizeof overhead, and this method allocates
width * size_t.sizeof internally to perform a snapshot.
false if it finds any InnerPQ that is not empty, or true if it
can determine that all InnerPQs are simultaneously empty.
This value is relative to a linearization point during the call.
Tests whether or not there are elements in any InnerPQ.
Requires the EnableEmpty flag to be set to use this method. The flag incurs a width * size_t.sizeof overhead, and this method allocates width * size_t.sizeof internally to perform a snapshot.