Re: Memory management question

[Jules Colding <colding omesc com>]

On Fri, 2005-01-21 at 13:28 -0500, Nick_Gianakas sybari com wrote:
> I'm interested in this issue as well.  I see OMG's C language mapping 
> addresses argument result passing.
> 
> The last paragraph of section 1.20 states:
>    For operation results of type variable-length struct, variable-length 
> union, wstring, string, sequence, array, or any, the ORB will allocate 
> storage for the return value using the appropriate type-specific 
> allocation function.  The client may use and retain that storage 
> indefinitely, and must indicate when the value is no longer needed by 
> calling the procedure CORBA_free().

I read that same paragraph myself. I have come to believe, due to
comments elsewhere about marshaling and freeing by the ORB, that the
value must be copied before it is given to the ORB. 

I will appreciate an authoritative answer as the documentation is rather
vague on this point.

-- 
  jules


> Regards,
> Nick G.
> 
> 
> 
> 
> 
> Jules Colding <colding omesc com>
> Sent by: orbit-list-bounces gnome org
> 01/21/2005 07:43 AM
>  
>         To:     ORBit2 <orbit-list gnome org>
>         cc: 
>         Subject:        Memory management question
> 
> 
> Hi,
> 
> I have an interface such as:
> 
> module BRUTUS {
>                  union SRestriction {
>                                  /* lots of variable sized stuff */
>                  };
> 
>                  interface SRestrictionContainer {
>                                  readonly attribute SRestriction content; 
>                  }
> };
> 
> 
> The get_content() attribute method is defined as:
> 
> static BRUTUS_SRestriction 
> *impl_BRUTUS_SRestrictionContainer__get_content(impl_POA_BRUTUS_SRestrictionContainer 
> *servant,
>   CORBA_Environment *ev)
> {
>         BRUTUS_SRestriction *retval;
> 
>         /* ------   insert method code here   ------ */
>                  retval = &servant->attr_content;
>         /* ------ ---------- end ------------ ------ */
> 
>         return retval;
> }
> 
> So my question is now: Should I just return a pointer to attr_content as
> I do above or should I make a copy of servant->attr_content ?
> 
> 
> Thanks,
>   jules
> 
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