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To be more exact, new in Java isn't quite the same as alloc() in RPG
or malloc in C/C++, or similar operations in other languages.

I believe a (direct?) ByteBuffer is probably closer, and I believe
those (can be?) uninitialized.

CHarles

On Thu, Oct 28, 2010 at 10:42 AM, <dieter.bender@xxxxxxxxxxxx> wrote:
just to stay exact: in Java you don't need to do

D*B

--------------------------------------------------
From: "Charles Wilt" <charles.wilt@xxxxxxxxx>
Sent: Thursday, October 28, 2010 4:20 PM
To: "RPG programming on the IBM i / System i" <rpg400-l@xxxxxxxxxxxx>
Subject: Re: Memory being reused by %alloc on second call to program.

Working as designed...

In any language, you should always initialize newly allocated memory;
if you code depends on it.


Charles

On Thu, Oct 28, 2010 at 9:36 AM, Bryce Martin <BMartin@xxxxxxxxxxxx>
wrote:
I have written my first external stored procedure and it uses dynamic
memory allocation to create a couple of 2D arrays.  The problem that I'm
seeing is this...

ProgramA using CLI calls StoredProc.  StoredProc %alloc/%realloc/%dealloc
and uses a regular static array for returning a result set.

ProgramA is two screens.  First screen has fields to search by.  If I
enter criteria and hit enter ProgramA then calls StoredProc.  ProgramA
then processes the ResultSet and puts it into a subfile for viewing.  If
I
F12 back to the first screen and change my search criteria to something
that shouldn't return results it still does but refined by whatever I
just
searched by.  If I F3 out of ProgramA then all the memory used by the
StoredProc is released even if I don't do a RCLACTGRP of ProgramA's
activation group.  If I search a second time after doing the full exit by
the criteria that should not return results then it works and returns no
results. (no results could also be a search that is too generic to have
good results, this is handled by the StoredProc).

In the StoredProc I am doing the following Destroy call, the
DestroyArray() procedure just take a pointer to an array memory address
and does a     dealloc(n) pWholeArray;

        pArrayElem = *null;
        DestroyArray(pWholeArray);
        pWholeArray = *null;

I nulled the pointers for good measure but that didn't do anything.

It looks like the second call is doing an %alloc and starting at the same
memory address as the previous call had done.  So when I %alloc a block
the memory already contains the data from the previous call.  How do I
handle this?

Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777
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