Of course it is. This is in fact the normal way that parameter data is passed!
I'm not sure what you mean by hiding complexity, and what pointers could do for that... Regarding the need to get data back to pgmA, perhaps a procedure pointer could be passed, then used as a "callback" function. Your pgmB takes the callback pointer, calls the function, which runs the code from the pgmA module.
Simpler would simply to define a DS for feedback data, declare and initialize in pgmA, then pass that in to pgmB.
-Eric DeLong
-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Stefan Tageson
Sent: Wednesday, July 08, 2009 9:58 AM
To: RPG400-L@xxxxxxxxxxxx
Subject: Passing a pointer between programs when using a dynamic call
Hello,
Is it possible to use a pointer as a parameter when calling another program?
The program call has to be made up dynamically and executed using qcmdexec
or system API...
So no procedure calls.
Background: Program A (main program gets invoked and based on a number of
things creates an datastructure ( mostly with pointers to other things ).
Then pgm A decides what program to call ( program B ) and builds a call
string that is executed using qcmdexec. There will be many program B's
Program B gets invoked and need a mechanism to send back information to
program A. Just to hide the complexity of the datastructure in program A my
thought was to create a service program ( program C ) with procedures that
can be called by program B. It then seems reasonably that a pointer must be
used to "connect" the procedures in pgm C with the datastructure in pgm A.
Along the run it might be needed for program C to change pointers in pgm A
datastructure ( realloc of memory ).
Am I out on very thin ice here? Better solutions?
Best regards
Stefan Tageson
AddconIT AB
S:t Gertrudsgatan 3, SE-211 25 Malmö, Sweden
Cell : +46 (0) 732 36 99 34
<mailto:stefan.tageson@xxxxxxxxxxx> stefan.tageson@xxxxxxxxxxx
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