| 1 | use oorandom::Rand64; |
|---|---|
| 2 | use std::cell::RefCell; |
| 3 | use std::time::{SystemTime, UNIX_EPOCH}; |
| 4 | |
| 5 | pub type Rng = Rand64; |
| 6 | |
| 7 | thread_local! { |
| 8 | static SEED_RAND: RefCell<Rand64> = RefCell::new(Rand64::new( |
| 9 | SystemTime::now().duration_since(UNIX_EPOCH) |
| 10 | .expect("Time went backwards") |
| 11 | .as_millis() |
| 12 | )); |
| 13 | } |
| 14 | |
| 15 | pub fn new_rng() -> Rng { |
| 16 | SEED_RAND.with(|r| { |
| 17 | let mut r = r.borrow_mut(); |
| 18 | let seed = ((r.rand_u64() as u128) << 64) | (r.rand_u64() as u128); |
| 19 | Rand64::new(seed) |
| 20 | }) |
| 21 | } |
| 22 |