Re: Space pointers

John,

There are heap instructions in MI.  ALCHSS, FREHSS are the main ones used.
Excellent performers and rock solid in practice.  MATHSAT is used to
materialize the attributes of the heap and each individual allocation.  This
would give the size of each allocation.  ALCHSS and FREHSS are easy enough
to use. using MATHSAT would  only take 3+ weeks of work.  All in the MI
Functional Reference. Recently online.

Another stategy is to over allocate each allocation.  Place the allocation
size and maybe some debug info in the 16 bytes immed before the actual data
of the allocation.

Good luck.

Steve Richter

----- Original Message -----
From: "John Taylor" <jtaylor@rpg2java.com>
To: <mi400@midrange.com>
Sent: Monday, April 08, 2002 2:13 PM
Subject: [MI400] Space pointers


> Group,
>
> I'm building a service program (in RPG) with the intent of simplying the
use
> of dynamic heap storage. One of the first things I've come across is the
> need to determine the amount of storage already allocated to a basing
> pointer. Since there is nothing in RPG, or the C runtime, that provides
this
> information, I'm hoping that MI may provide a solution.
>
> I would appreciate it someone could point me in the right direction. RTFM
> will work, but which manual? And is there a specific instruction that I
> should look for?
>
>
> Regards,
>
> John Taylor
>
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