Freeing a struct from a callback that is a field of the struct

Consider this code:

typedef struct Test_s Test;

typedef void (*FreePtr)(Test*);

struct Test_s{
    FreePtr freePtr;
};
    
void freeFunction(Test* t) {
    free(t);
}
void main(void) {
    Test* t = malloc(sizeof(*t));
    t->freePtr = freeFunction;
    t->freePtr(t);
}

Is it possible to free t from within freeFunction? I think it is possible, but I decided to ask as I am not quite sure.

>Solution :

I suspect you’re concerned that you’re freeing the pointer that you indirected through to get to the function that’s running. This isn’t a problem.

t->freePtr(t);

is equivalent to

Freeptr tempfunc = t->freePtr;
tempfunc(t);

As you can see from this rewrite, t is not still in use while the function is running.