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use byteorder::{ByteOrder, BigEndian};
use std::ops::Deref;
use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
use std::u64;
const TAI64N_BASE: i64 = 4611686018427387914;
#[derive(PartialEq, PartialOrd)]
pub struct Tai64n {
tai64n: [u8; 12]
}
impl Tai64n {
pub fn now() -> Tai64n {
let mut tai64n = [0u8; 12];
let now = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
BigEndian::write_i64(&mut tai64n[0..], TAI64N_BASE + now.as_secs() as i64);
BigEndian::write_i32(&mut tai64n[8..], now.subsec_nanos() as i32);
Tai64n { tai64n }
}
}
impl Deref for Tai64n {
type Target = [u8; 12];
fn deref(&self) -> &[u8; 12] {
&self.tai64n
}
}
impl From<[u8; 12]> for Tai64n {
fn from(tai64n: [u8; 12]) -> Self {
Tai64n { tai64n }
}
}
lazy_static! {
pub static ref FOREVER: Duration = Duration::from_secs(u64::MAX);
pub static ref FOREVER_AGO: Instant = Instant::now() - *FOREVER;
}
pub struct Timestamp(Option<Instant>);
impl Default for Timestamp {
fn default() -> Self {
Timestamp(None)
}
}
impl Deref for Timestamp {
type Target = Instant;
fn deref(&self) -> &Self::Target {
match self.0 {
Some(ref time) => time,
None => &*FOREVER_AGO,
}
}
}
impl Timestamp {
pub fn now() -> Self {
Timestamp(Some(Instant::now()))
}
pub fn unset() -> Self {
Timestamp(None)
}
pub fn is_set(&self) -> bool {
self.0.is_some()
}
pub fn elapsed(&self) -> Duration {
Instant::now().duration_since(**self)
}
}
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