Value and Pointer Classes
The concrete producer-consumer classes can be subdivided into groups according to their functionality. The following classes have simple producer-consumer synchronization semantics to support the exchange of data values or pointers:
*RWTPCValQueue— Value-based queue
*RWTPCValStack — Value-based stack
*RWTPCPtrQueue — Pointer-based queue
*RWTPCPtrStack — Pointer-based stack