AW: [omniORB] DLLified echo example

[Gavin Uttley]

Hi,

OK, i tried this although i still get the same exception when being 
called via a dll from a delphi app.
I did a quick test running the same class in a C++ exe and it worked 
fine, perhaps this is something
todo with it beign called via a dll?


gav,



fischer.c at atlas.de wrote:

>Hi,
>
>you should write your function the following way:
>
>/*-----------------------------------------------------------------------*/
>char* Hello(CORBA::Object_ptr obj, CORBA::String_var src)
>{
>    // use Echo_var instead of Echo_ptr for proper reference counting
>    Echo_var e = Echo::_narrow(obj); 
>
>    if( CORBA::is_nil(e) ) {
>        errLog << "hello: The object reference is nil!\n" << endl;
>
>        // return dynamically allocated memory here
>        return CORBA::string_dup("");
>    }
>
>    // do not release memory on return
>    return e->echoString(src);
>
>    // or this way:
>    /*
>    CORBA::String_var dest = e->echoString(src);
>    return dest._retn();
>    */
>}
>    
>/*-----------------------------------------------------------------------*/
>
>You should always have in mind one of the basic CORBA IDL to C++ mapping rules:
>
>Functions with variable-size return values like strings (or structures containing string or sequences or something similar) always return dynamically allocated memory and the caller is responsable for releasing the returned memory (usually by using a _var type).
>
>
>
>  
>


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