ref: 9ae12fa984b9bc0eb0a33f9c0cf5b4ebd47ecd6d
dir: /hash.h/
typedef union Hkey Hkey;
union Hkey {
void *p;
int v;
};
typedef struct Hmap Hmap;
struct Hmap {
uvlong (*hash)(void*);
int (*cmp)(void*,void*);
int nbs;
int nsz;
int len;
int cap;
uchar *nodes;
};