library/std/src/sys/sgx/time.rs

   1 use super::abi::usercalls;
   2 use crate::time::Duration;
   3
   4 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
   5 pub struct Instant(Duration);
   6
   7 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
   8 pub struct SystemTime(Duration);
   9
  10 pub const UNIX_EPOCH: SystemTime = SystemTime(Duration::from_secs(0));
  11
  12 impl Instant {
  13     pub fn now() -> Instant {
  14         Instant(usercalls::insecure_time())
  15     }
  16
  17     pub fn checked_sub_instant(&self, other: &Instant) -> Option<Duration> {
  18         self.0.checked_sub(other.0)
  19     }
  20
  21     pub fn checked_add_duration(&self, other: &Duration) -> Option<Instant> {
  22         Some(Instant(self.0.checked_add(*other)?))
  23     }
  24
  25     pub fn checked_sub_duration(&self, other: &Duration) -> Option<Instant> {
  26         Some(Instant(self.0.checked_sub(*other)?))
  27     }
  28 }
  29
  30 impl SystemTime {
  31     pub fn now() -> SystemTime {
  32         SystemTime(usercalls::insecure_time())
  33     }
  34
  35     pub fn sub_time(&self, other: &SystemTime) -> Result<Duration, Duration> {
  36         self.0.checked_sub(other.0).ok_or_else(|| other.0 - self.0)
  37     }
  38
  39     pub fn checked_add_duration(&self, other: &Duration) -> Option<SystemTime> {
  40         Some(SystemTime(self.0.checked_add(*other)?))
  41     }
  42
  43     pub fn checked_sub_duration(&self, other: &Duration) -> Option<SystemTime> {
  44         Some(SystemTime(self.0.checked_sub(*other)?))
  45     }
  46 }