ref: 03f72f7bc34e43a767cf3686ac3c0f55cf7c64d5
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;
};