[C++-sig] Contructor with "with_custodian_and_ward_postcall"

[Renato Araujo]

Hi

To solve my previous problem I'm trying implement a class witch store
the PyObject pointer.
using this solution:
http://www.boost.org/doc/libs/1_36_0/libs/python/doc/v2/faq.html#xref

then during the destructor of my wrapper class I want destroy the
PyObjects of my children with:

object_wrapper::~object_wrapper()
{
    foreach(object child, this->children())
        python::detail::dealloc(child->py_self;);
}

but after my function I get a core dump in this boost call:
  * boost::python::objects::find_instance_impl(_object*,
boost::python::type_info, bool) (in
/usr/lib/libboost_python-py25.so.1.35.0)

I think there is a way to communicate to boost to remove my objet form
your object list. How I can do this?
This is the correct way?? Have a best boost way to do this??

BR
-- 
Renato Araujo Oliveira Filho

On Mon, Nov 3, 2008 at 4:15 PM, Renato Araujo <renatox at gmail.com> wrote:
> Sorry my last message I sent incomplete :)
>
>
> I will try again.
>
> First I have a c++ class like this:
>
> struct object
> {
>     object(object *parent=0)  // if parent !=NULL append this at
> parent children list
>     ~object() //Destroy all children
> };
>
>
> Is possible implement this using "python::with_custodian_and_ward_postcall"?
> I tried some like that:
>
>  qclass_<object_wrapper, boost::noncopyable > ("object", python::init<> ())
>   //here i put self will be the ward and arg 2 (parent) will be the
> custodian
>   //the lifetime of the self will be dependent on the lifetime of the parent
>   .def(python::init<object*>()[python::with_custodian_and_ward_postcall<2,1>()])
>
>
> But in my python code I tried some like that:
>
> o = object()
> o2 = object(o)
>
> del o
>
> and this produce this exception during the del operation:
> *** glibc detected *** python: free(): invalid pointer: 0x09c89970 ***
>



-- 
Renato Araujo Oliveira Filho