ref: 5d8b5ae1ef2dd2b2e33e2683968dc62ce25a3cac
dir: /lib/c/malloc.h/
#include <stdlib.h>
/* minimum amount of required units */
#define NALLOC 10000
typedef union header Header;
union header {
struct hdr {
Header *next;
size_t size;
} h;
/* most restrictive type fixes the union size for alignment */
_ALIGNTYPE most;
};
extern void *_prevchunk(Header *hp);