laan wrote:
> Hi,
>
> I'm having issues with Boost::Python objects that contain a reference to a
> c++ object:
>
> --- C++ code ----
>
> #include <boost/python.hpp>
>
> struct Container;
>
> struct Element
> {
> Element(const Container * c) : _container(c) { }
> std::string name() const;
> const Container * _container;
> };
>
> struct Container
> {
> Container(const std::string & s) : _string(s) { }
>
> Element getElement()
> {
> return Element(this);
> }
> std::string name() const
> {
> return this->_string;
> }
> std::string _string;
> };
>
> std::string Element::name() const
> {
> return _container->name();
> }
>
> using namespace boost::python;
>
> BOOST_PYTHON_MODULE(libkatya)
> {
> class_<Element>("Element", no_init)
> .def("name", &Element::name)
> ;
>
> class_<Container>("Container", init<std::string>())
> .def("getElement", &Container::getElement)
> ;
> }
> --- Python Code ----------------------
> container = test.Container("X")
> elem = container.getElement()
> del(container)
> print(elem.name())
>
> When calling elem.name(), it will reference the "container" object, which
> has been deleted, and I'm getting a segfault.
>
> How can I make boost::python increment the reference counter of Container
> when an element containing a pointer to the Container is returned?
>
>
>
>
>
> --
> View this message in context:
> http://boost.2283326.n4.nabble.com/Boost-Python-Reference-Counting-tp4662504.html
> Sent from the Python - c++-sig mailing list archive at Nabble.com.
Usually if I need a c++ obj to hold onto a reference, I use boost::shared_ptr.
boost::python knows how to interoperate between boost::shared_ptr and python
ref
counting.
_______________________________________________
Cplusplus-sig mailing list
Cplusplus-sig@python.org
https://mail.python.org/mailman/listinfo/cplusplus-sig
