ref: d2278660a0bce54ae4a5d37f2fbc6dd4c2f459c8
dir: /src/libc/stdlib/malloc.h/
#include <stdlib.h> /* minimum amount of required units */ #define NALLOC 16 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);