src/libstd/sys/wasm/time.rs

   1 use crate::time::Duration;
   2
   3 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
   4 pub struct Instant(Duration);
   5
   6 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
   7 pub struct SystemTime(Duration);
   8
   9 pub const UNIX_EPOCH: SystemTime = SystemTime(Duration::from_secs(0));
  10
  11 impl Instant {
  12     pub fn now() -> Instant {
  13         panic!("time not implemented on wasm32-unknown-unknown")
  14     }
  15
  16     pub const fn zero() -> Instant {
  17         Instant(Duration::from_secs(0))
  18     }
  19
  20     pub fn actually_monotonic() -> bool {
  21         false
  22     }
  23
  24     pub fn checked_sub_instant(&self, other: &Instant) -> Option<Duration> {
  25         self.0.checked_sub(other.0)
  26     }
  27
  28     pub fn checked_add_duration(&self, other: &Duration) -> Option<Instant> {
  29         Some(Instant(self.0.checked_add(*other)?))
  30     }
  31
  32     pub fn checked_sub_duration(&self, other: &Duration) -> Option<Instant> {
  33         Some(Instant(self.0.checked_sub(*other)?))
  34     }
  35 }
  36
  37 impl SystemTime {
  38     pub fn now() -> SystemTime {
  39         panic!("time not implemented on wasm32-unknown-unknown")
  40     }
  41
  42     pub fn sub_time(&self, other: &SystemTime) -> Result<Duration, Duration> {
  43         self.0.checked_sub(other.0).ok_or_else(|| other.0 - self.0)
  44     }
  45
  46     pub fn checked_add_duration(&self, other: &Duration) -> Option<SystemTime> {
  47         Some(SystemTime(self.0.checked_add(*other)?))
  48     }
  49
  50     pub fn checked_sub_duration(&self, other: &Duration) -> Option<SystemTime> {
  51         Some(SystemTime(self.0.checked_sub(*other)?))
  52     }
  53 }