#define GARY_INIT_ZERO(ptr, n) (ptr) = gary_init(sizeof(*(ptr)), (n), 1)
#define GARY_FREE(ptr) do { if (ptr) xfree(GARY_HDR(ptr)); } while (0)
#define GARY_SIZE(ptr) (GARY_HDR(ptr)->num_elts)
#define GARY_INIT_ZERO(ptr, n) (ptr) = gary_init(sizeof(*(ptr)), (n), 1)
#define GARY_FREE(ptr) do { if (ptr) xfree(GARY_HDR(ptr)); } while (0)
#define GARY_SIZE(ptr) (GARY_HDR(ptr)->num_elts)