how to set pointer to a memory to NULL using memset?

Question

I have a structure

typedef struct my_s {

   int x;
   ...
} my_T;

my_t * p_my_t;

I want to set the address of p_my_t to

Answer 1

I think maybe you want

extern void set_t_pointer_to_null(my_T *pp);

and call

set_t_pointer_to_null(&p_my_t);

where

void set_t_pointer_to_null(my_T *pp) { *pp = NULL; }

I'm not sure it's worth defining a function to do this, but I think this answers the question you're trying to ask.