How to write the body for the call back function in a mcaro?

Question

I have a macro as below

#define _UPDATE(layer, fb_pointer) (_update(((void*)fb_pointer)))

the above line is present in _update.cfg file

so i am calling the macro as below:

UINT8 fl_status_U8 = _UPDATE(fl_lid_U8, _GET_WORKING_FB_PTR(fl_lid_U8));

above line is in _update.c

So far everything is going well. Now where should i write the body of the call back function _update(void * ptr)?

I am writing a simulation in vc++ express edition visual studio 2008.

Vulpes · Answer

The macro makes little sense to me as the first parameter layer isn't actually used in its definition. Anyway after the preprocessor has replaced the macro with its definition you'll end up with: UINT8 fl_status_U8 = _update(((void*))_GET_WORKING_FB_PTR(fl_lid_U8)) The _update(void *ptr) function should be defined somewhere above that statement in _update.c.