[C400-L] RE: C400-L Digest, Vol 3, Issue 13

["Bob Cozzi" <cozzi@xxxxxxxxx>]

The QMHSNDM API uses the relative invocation to send messages. IBM probably
should have created a new set of APIs that were procedure invocation aware
rather than "break" the good old program-aware message APIs, but that's just
wishful thinking. 

So when you call the API from main() the message is sent to the prior
program invocation, if you call it from a function/procedure, it is sent to
main(). If you call it from a nested function/procedure, it is sent to the
calling function--same as when it is called from main().
-Bob
 

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Subject: C400-L Digest, Vol 3, Issue 13

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Today's Topics:

   1. Memory usage of process (kapil  gupta)
   2. QMHSNDM question (Pierre-Henry Deliege)


----------------------------------------------------------------------

message: 1
date: 7 Feb 2005 13:57:43 -0000
from: "kapil  gupta" <guptakapilg@xxxxxxxxxxxxxx>
subject: [C400-L] Memory usage of process

Hi
I have a process(root) which spawns other processes to get its work done.
These children in turn may spawn more processes and so on. I want to obtain
the memory used by all of these processes at a point of time from the root
process(very 1st process).
So, I neeed 2 things:

First is to obtain all the process handles of this process tree.
So, Is there a way to find all the child processes for a particular process.
Right now I am using "CreateToolhelp32Snapshot" to obtain a snapshot of all
the processes in the system and then looking for the processes which have
root process as their parent. Doing this recursively to obtain the whole
process tree.
Is there a better approach available for doing this?

Secondly, get the memory used by process. Is there an API available to do
this? Can not use "PSAPI" as its not for Win95, 98.

Thanx
kapil  
 
 


------------------------------

message: 2
date: Mon, 7 Feb 2005 17:05:41 +0100
from: "Pierre-Henry Deliege" <phdeliege@xxxxxxxxxxxxxxxxx>
subject: [C400-L] QMHSNDM question

Dear all,

 

Within a C program under my AS/400, I'm trying to send messages to different
message queues.

First of all, I'm really new in C programming under OS/400, I used to work
only on Unix platform.

 

I'm using the command QMHSNDM included in a specific function called sndmsg:

 

void sndpgmmsg (char *msg_id, char *msg_data)

{

char *err_code;

char msg_key[4];

char tmp_msg_id[7];

typedef struct qual_name_struct

  {

   char  name[10];

   char  libr[10];

  } qual_name_struct;

  

qual_name_struct  MsgQList[2];  

 

strncpy(MsgQList[0].name,"PHDMSGQ   ",10);

strncpy(MsgQList[1].name,"QSYSOPR   ",10);

strncpy(MsgQList[0].libr,"PHDDTALIBS",10);

strncpy(MsgQList[1].libr,"QSYS      ",10);

 

memset(&err_code, 0, sizeof(err_code));

memcpy(tmp_msg_id, msg_id, sizeof(tmp_msg_id));

QMHSNDM(tmp_msg_id,

         "ATLMSGS   ATLPGMLIBS",

         msg_data,

         strlen(msg_data),

         "*INFO     ",

         &MsgQList,

         2,

         "",

         msg_key,

         &err_code);

}

 

When I call this function within the main() function, I have no problem,
everything is working fine.

But when I call it in an other function called by main, my program stop
without error at the call of QMHSNDM !!!

 

Do you have any idea of the problem ?

Also, I tried to find the cause of the error in the log (using dsplog) but
it says terminating with RC = 0 !!! Is there any other place to look for
errors reporting ?

 

I thank you in advance for your help.

Pierre-Henry DELIEGE




 



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