[omniORB] How to use MyObject_var and MyObject_out

[Jens Nissen]

I'm using omniOrb 3.05 on Win2K.
I have a simple Interface that roughly looks like this:
struct MyParameter
{
  string message;
  unsigned long id;
}
and I have a method
module MyModule
{
  interface MyInterface
  {
     void GetData( in unsigned short x, out MyParameter y);
  };
};

Now I want to write a client and a separate server! 
How does the code for them have to look like?

I tried 
// Client.CPP, myInterface is a MyInterface_var
void foo()
{
        MyParameter_var p;
        myInterface->GetData(1,p);
        TRACE(p->message);   // Message is still correct
        return;  // Crash here: Destruction of p->message violates heap
}

// Server.CPP, MyInterfaceClass derived from stub

void MyInterfaceClass::GetData(CORBA::UShort x, MyParameter_out y)
{
  // x is correct
  y = new MyParameter;
  y->message = strdup((const char*)"Hallo");
  y->id = 0;
}

But whatever I do, I get a heap violation inside the client.
I tried GetData(1,p.out()) on the client,
I tried to construct a var and return it with _retn() in the Server, both to
no avail.

Now there is one solution, but this looks more a less like a nasty hack and
cannot be real:
Change the client:
{ ...
  p->message._ptr = 0;
  return; // No crash: no wonder, but memory leak now?
}

How does the correct code look like?
Is there a CORBA sample somewhere on the WWW? All I find are copies of the
hello-sample, where a simple string is passed.

Kind regards,

Jens

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