Re: Memory Leaks in RPG (was: Is RPG 'DEAD")

IIRC you have to *specify* how much memory to deallocate/reallocate.

Thanks,
Tommy Holden


From:
"Rory Hewitt" <roryhewitt@xxxxxxxxx>
To:
"RPG programming on the AS400 / iSeries" <rpg400-l@xxxxxxxxxxxx>
Date:
06/19/2008 04:20 PM
Subject:
Re: Memory Leaks in RPG (was: Is RPG 'DEAD")



Jerry,

Basically, the length of allocated space is held separately from the
pointer
itself - you have to pass this information around. Although maybe Bruce
can
tell us how, when you use DEALLOC, it knows how much space was previously
allocated (and therefore, how much to reallocate)...

On Thu, Jun 19, 2008 at 2:09 PM, Jerry Adams <Jerry@xxxxxxxxxxxxxxx>
wrote:

Like David, I'm learning a lot from these emails (just a lot more

slowly).

A pointer is, as stated, just an address. But it's just the starting
address, right? Which, if I understand Bruce's example and David's

concern

correctly, means that PgmA could pass PgmB an address to a parm. But

this

pointer/address wouldn't have any clue how long that parm is, right?

I.e.,

if PgmA intended for PgmB to use, say, ten bytes it would have to pass

that

bit of trivia with the pointer. But, if PgmB decided to use twenty

bytes

starting at the passed address, it could. Or is the length of the

address

space to be used inherent in the pointer itself?

Jerry C. Adams
IBM System i Programmer/Analyst
B&W Wholesale
office: 615-995-7024
email: jerry@xxxxxxxxxxxxxxx