[omniORB] strings parameters passing rules.

[jorgefm at cirsa.com]

Hi all !

After reading 'Advanced CORBA programming with C++' i have some questions
about
passing strings from a client to the server.

With the idl file:

struct Vls {
  long l_mem;
  string s_mem;
};

interface Foo {
  Vls vls_op( in Vls vls_in, inout Vls vls_inout, out Vls vls_out ) ;
};

If i have a method:

void my_func( const char *str_in, char *str_inout )
{
  Foo_var fv = ...; // Get reference

  Vls in_val;
  Vls inout_val;
  Vls *out_val;
  Vls *ret_val;

  in_val.l_mem = 99;
1)  in_val.s_mem = str_in;
2)  in_val.s_mem = CORBA::string_dup( str_in );

  inout_val.l_mem = 99;
  inout_val.s_mem = CORBA::string_dup( str_inout );

  ret_val = fv->vls_op( in_val, inout_val, out_val );

3) CORBA::string_free( in_val.s_mem );
4) str_inout = inout_val.s_mem;

...

If i put 2) then i have to put 3).

My questions are:

 The 1) is correct ? or always i have to do 2)
 And what about 4) ? Who have to free this resource ?

Any comment is welcome !
Thanks in advance,
Jorge
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