Passing pointer-to-member-function as pointer-to-function

Question

So here\'s the situation: I\'m using C++, SDL and GLConsole in conjunction. I have a class, SDLGame, which has the Init(), Loop(),

Answer 1

If the only interface you have is that function pointer, then you're screwed.

A member function needs a this pointer to be called, and if you have no way of passing that, you're out of luck (I guess the std::vector* args pointer is what you get passed from the library).

In other words, even though that library uses C++ containers, it's not a good C++ library, because it relies on free functions for callbacks. A good C++ library would use boost::function or something similar, or would at the very least let you pass a void* user_data pointer that gets passed through to your callback. If you had that, you could pass the this pointer of your class, cast it back inside the callback, and call the appropriate member function.