[omniORB] sequence problem / beginner

[konstantin.ermakov@bnpparibas.com]

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Hello, again.

     Being more specific :

===========================


the server side is :


- jumboExt.cpp

structure* jumboExt :: iXSGetData() {

     tmp->length( 100 );
     for( int i=0; i < 100; i++ ) {
          tmp[i] = i;
     };

     tmp = &temp;
//   return tmp._retn();
     return tmp.out();
};

// note : temp and tmp were declared in the class jumboExt ( no specific
initialization );
-------------------------------


the client side is :

......
try {

     ................................................
     structure     *data;
     data = handler->iXSGetData();

} catch ( CORBA :: Exception & ) {

     cout << "Exception";          // This exception was thrown, I also tried to
use structure_var data. It doesn't seems to work.

};

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


Internet

vonWedel@lfpt.rwth-aachen.de on 04.04.2001 14:05


To :  Konstantin Ermakov, omniorb-list
cc :
bcc :
Subject:  Re: [omniORB] sequence problem / beginner




Salut,

> the server side is :
>
> - jumboExt.cpp
>
> structure* jumboExt :: iXSGetData() {
>
>      tmp->length( 100 );
>      for( int i=0; i < 100; i++ ) {
>           tmp[i] = i;
>      };
>
>      tmp = &temp;
> //   return tmp._retn();
>      return tmp.out();
> };

You neither define tmp nor temp so its difficult to spot where the
actual problem
is. You should be able to do however:

> structure* jumboExt :: iXSGetData() {
>
       structure_var tmp = new structure();

>      tmp->length( 100 );
>      for( int i=0; i < 100; i++ ) {
>           tmp[i] = i;
>      };
>
       return tmp._retn();
> };

>      structure     *data;
To be CORBA-compliant you'd rather write

       structure_var data;

>      data = handler->iXSGetData();
>
> } catch ( CORBA :: Exception & ) {
>
>      cout << "Exception";          // This exception was thrown
>
> };

Probably due to some memory management problem in the server
because the sequence wasn't allocated properly. The book on
'Advanced CORBA programming with C++' by Henning/Vinoskit has
a good explaination of the memory management issues when using CORBA.

Lars


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