Re: [MI400] Space pointers

["Simon Coulter" <shc@xxxxxxxxxxxxxxxxx>]

Hello John,

Given that you said "I'm building a service program (in RPG) with the
intent of simplying the use of dynamic heap storage."

I honestly can't see anything simpler than the supplied RPG IV op-codes:

        ALLOC
        REALLOC
        DEALLOC

You also said:

>This is only good for the default (ILE) heap.

IBM provide a set of ILE storage management APIs that let you define you
own heap and control the allocation strategy.

>From the ILE API Reference:
"The storage management APIs fall into the following categories:

Basic heap operations
        o Free Storage (CEEFRST) API frees one previously allocated heap
          storage.
        o Get Heap Storage (CEEGTST) API allocates storage within a heap.
        o Reallocate Storage (CEECZST) API changes the size of previously
          allocated storage.

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

Heap allocation strategies
        o Define Heap Allocation Strategy (CEE4DAS) API defines an
          allocation strategy that determines the attributes for a heap
          created with the CEECRHP API. "

If these APIs are too difficult for your target programmer then wrap them
up in a service program but at least they may make your efforts easier.

Regards,
Simon Coulter.

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