1 #include <stddef.h> 2 3 extern void *wrapped_malloc (size_t size); 4 extern void wrapped_free (void *ptr); 5 6 typedef struct boxed_int 7 { 8 int i; 9 } boxed_int; 10 11 extern boxed_int *make_boxed_int (int i); 12 extern void free_boxed_int (boxed_int *bi); 13