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use crate::time::{Duration, Instant};
use ambient_authority::AmbientAuthority;
use std::time;
/// A reference to a monotonically nondecreasing clock.
///
/// This does not directly correspond to anything in `std`, however its methods
/// correspond to [methods in `std::time::Instant`].
///
/// [methods in `std::time::Instant`]: https://doc.rust-lang.org/std/time/struct.Instant.html#impl
pub struct MonotonicClock(());
impl MonotonicClock {
/// Constructs a new instance of `Self`.
///
/// # Ambient Authority
///
/// This uses ambient authority to accesses clocks.
#[inline]
pub const fn new(ambient_authority: AmbientAuthority) -> Self {
let _ = ambient_authority;
Self(())
}
/// Returns an instant corresponding to "now".
///
/// This corresponds to [`std::time::Instant::now`].
#[inline]
pub fn now(&self) -> Instant {
Instant::from_std(time::Instant::now())
}
/// Returns the amount of time elapsed since this instant was created.
///
/// This corresponds to [`std::time::Instant::elapsed`].
#[inline]
pub fn elapsed(&self, instant: Instant) -> Duration {
instant.std.elapsed()
}
}