ref: 8604fd05150d98be7c9503ec9a97b63f05371ff7
dir: /src/libc/stdlib/malloc.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 *);