### ❄️ snof
*snof* is a unique ID generator. Loosely based on snowflake ID-s, *snof*
generates 64 bit long identifiers consisting of a 32 bit millisecond-based
timestamp, and 22 bits of sequence distinguishing identifiers generated within
the same millisecond.
The generator uses atomic operations for tracking state, thus it provides a
thread-safe, lock-free way of generating unique ID-s. In case of the sequence
being exhausted, or the clock moving backwards, the generator spins until
validity is restored.
#### Usage
```rust
use snof::SnowflakeGenerator;
fn main() {
let generator = Arc::new(SnowflakeGenerator::new());
let threads: Vec<_> = (0..4).map(|_| {
let other_generator = Arc::clone(&generator);
thread::spawn(move || {
let id = other_generator.generate();
println!("thread id: {}", id.0);
})
}).collect();
for t in threads { t.join().unwrap(); }
}
```