# Quiz1 of Computer Architecture (2025 Fall)

## Problem `A`

1. What's the benfits of using indirect pointer to the void?
- According to [ISO/IEC 9899:TC3](https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf). A pointer to void (`void *`) can be pointed to a variable of any data type.
- [6.3.2.3] A pointer to void may be converted to or from a pointer to any incomplete or object type.
- By utilizing indirect pointer to void (`void **`) allows `vector_t` holds diffenent types of data in the same array.

2. The meaning of `typedef void (*vector_delete_callback_t)(void *);`.
- function pointer.
- It is an **action** that can be passed as parameters and invoked inside a for loop.

3. Is there another way to implement the `vector_delete_all` function without `vector_pop`?
- Pass the delete callback function to `vector_for_each`, and reset the `v->size` and `v->count` to zero after that.
- [Glib](https://gitlab.gnome.org/GNOME/glib/-/blob/main/glib/glist.c#L1001) provides an implementation of `g_list_foreach` in a similar manner. In `g_list_free_full`, the foreach function is used to free the contents of the list object.

void
g_list_free_full (GList          *list,
                  GDestroyNotify  free_func)
{
  g_list_foreach (list, (GFunc) free_func, NULL);
  g_list_free (list);
}

g_list_foreach (GList    *list,
                GFunc     func,
                gpointer  user_data)
{
  while (list)
    {
      GList *next = list->next;
      (*func) (list->data, user_data);
      list = next;
    }
}

typedef void (*GFunc) (gpointer       data,
                       gpointer       user_data);