Casting a function pointer to another type

Question

Let\'s say I have a function that accepts a void (*)(void*) function pointer for use as a callback:

void do_stuff(void (*callback_fp)(void*), vo         


        

Answer 1

The point really isn't whether you can. The trivial solution is

void my_callback_function(struct my_struct* arg);
void my_callback_helper(void* pv)
{
    my_callback_function((struct my_struct*)pv);
}
do_stuff(&my_callback_helper);

A good compiler will only generate code for my_callback_helper if it's really needed, in which case you'd be glad it did.