RE: lifetime of a static variable

[pytel@xxxxxxxxxx]

> Does this mean that the static storage from a program remains allocated
> until its activation group ends?

Yes.

Every activation group will have it's own copy of static variables.
If you have module in *SRVPGM defined as *CALLER, then for every activation
group which calls this module, there will be a separate copy of static
variables for this module. This creates an isolation between activation
groups.
The idea of activation group is to have many applications in the same job
at the same time, but still isolated.

In theory these copies of static variables can take up a lot of space - if
you create lots of named activation groups, each calling the same module
with *CALLER, and never end activation groups.

    Alexei Pytel



Joel Fritz <JFritz@sharperimage.com>@midrange.com on 11/15/2000 03:40:45 PM

Please respond to RPG400-L@midrange.com

Sent by:  owner-rpg400-l@midrange.com


To:   "'RPG400-L@midrange.com'" <RPG400-L@midrange.com>
cc:
Subject:  RE: lifetime of a static variable



Does this mean that the static storage from a program remains allocated
until its activation group ends?  Suppose you use *caller most of the time
and actually call the programs from programs in the default activation
group.  Are there potential unpleasant consequences?  It sounds like you
could encounter something similar to the DOS/Windows problem with memory
leaks.

> -----Original Message-----
> From: pytel@us.ibm.com [mailto:pytel@us.ibm.com]
> Sent: Wednesday, November 15, 2000 11:07 AM
> To: RPG400-L@midrange.com
> Subject: RE: lifetime of a static variable
>
>
>
> Think of it as a generalization of a concept of "main program".
> For ILE "main program" is activation group.
> Most of resources in ILE are scoped to activation group -
> static storage,
> heap storage, open files etc. etc.
>
>     Alexei Pytel
>
>
>
>
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