Extended Heap Operations APIs

The extended heap operations APIs are:

• Create Heap (CEECRHP) creates a new heap.
• Discard Heap (CEEDSHP) discards an existing heap.
• Mark Heap (CEEMKHP) returns a token that can be used to identify heap storage to be freed by the CEERLHP API.
• Release Heap (CEERLHP) frees all storage allocated in the heap since the mark was specified.