library/std/src/sys/unsupported/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 this platform")
  14     }
  15
  16     pub fn checked_sub_instant(&self, other: &Instant) -> Option<Duration> {
  17         self.0.checked_sub(other.0)
  18     }
  19
  20     pub fn checked_add_duration(&self, other: &Duration) -> Option<Instant> {
  21         Some(Instant(self.0.checked_add(*other)?))
  22     }
  23
  24     pub fn checked_sub_duration(&self, other: &Duration) -> Option<Instant> {
  25         Some(Instant(self.0.checked_sub(*other)?))
  26     }
  27 }
  28
  29 impl SystemTime {
  30     pub fn now() -> SystemTime {
  31         panic!("time not implemented on this platform")
  32     }
  33
  34     pub fn sub_time(&self, other: &SystemTime) -> Result<Duration, Duration> {
  35         self.0.checked_sub(other.0).ok_or_else(|| other.0 - self.0)
  36     }
  37
  38     pub fn checked_add_duration(&self, other: &Duration) -> Option<SystemTime> {
  39         Some(SystemTime(self.0.checked_add(*other)?))
  40     }
  41
  42     pub fn checked_sub_duration(&self, other: &Duration) -> Option<SystemTime> {
  43         Some(SystemTime(self.0.checked_sub(*other)?))
  44     }
  45 }