Difference between revisions of "HOWTO resolve circular references in ns-3 memory disposal"

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(HOWTO resolve smart pointer circular references in ns-3 memory disposal)
(HOWTO resolve smart pointer circular references in ns-3 memory disposal)
Line 19: Line 19:
 
     {
 
     {
 
         Ptr<A> a = CreateObject<A>();
 
         Ptr<A> a = CreateObject<A>();
         Ptr<B> b = CreateObject<B>();
+
         Ptr&lt<B> b = CreateObject<B>();
 
         a->m_callback = MakeCallback (&B::CallbackMethodB, b);
 
         a->m_callback = MakeCallback (&B::CallbackMethodB, b);
 
         b->m_callback = MakeCallback (&A::CallbackMethodA, a);
 
         b->m_callback = MakeCallback (&A::CallbackMethodA, a);

Revision as of 16:46, 30 August 2013

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<A> a = CreateObject<A>();
       Ptr&lt b = CreateObject<B>();
       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> b = CreateObject<B>();
       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