When C++ obeject is passed to C function

[Eljay Love-Jensen]

Hi Vallabha,

Don't try to put instance method virtual function pointers into a C 
structure of function pointers.  An instance method virtual function 
pointer is a different animal.

You should use glue/stub routines.

class Base {
public:
    // Option #1 entry stub...
    static void KickEntry(void* self) {
       Base* base = static_cast<Base*>(self);
       base->KickSelf();
    }
    // ...end-of-#1.

    // Option #2 entry stub...
    /*final*/ void Kick() { KickSelf(); }
    // ... end-of-#2.

    virtual void KickSelf() = 0;
};

Put KickEntry() or Kick() into your C structure of function 
pointers.  KickSelf() won't work.

My preference is KickEntry(), but if you are careful Kick() will work too.

Also, strongly consider making KickSelf() private.  Or at least, protected.

--Eljay