HOWTO resolve circular references in ns-3 memory disposal

HOWTO resolve smart pointer circular references in ns-3 memory disposal

    class A : public Object
    {
    public:
       static TypeId GetTypeId (void);
       void CallbackMethodA();
       Callback<void> m_callback;
    };
    class B : public Object
    {
    public:
       static TypeId GetTypeId (void);
       void CallbackMethodB();
       Callback<void> m_callback;
    };

    int main(int argc, char* argv[])
    {
    Ptr\lA\g a = CreateObject<A>();

Ptr b = CreateObject();

a->m_callback = MakeCallback (&B::CallbackMethodB, b); b->m_callback = MakeCallback (&A::CallbackMethodA, a); }

or

int main(int argc, char* argv[]) { Ptr<A> a = CreateObject<A>(); Ptr b = CreateObject();

a->m_callback = MakeCallback (&B::CallbackMethodB, b); b->AggregateObject(a); }

==15749== LEAK SUMMARY: ==15749== definitely lost: 40 bytes in 1 blocks ==15749== indirectly lost: 152 bytes in 5 blocks ==15749== possibly lost: 0 bytes in 0 blocks ==15749== still reachable: 10,360 bytes in 5 blocks ==15749== suppressed: 0 bytes in 0 blocks