diff --git a/src/libstd/time/duration.rs b/src/libstd/time/duration.rs index d715a0d740b4..8c37c38bbc8f 100644 --- a/src/libstd/time/duration.rs +++ b/src/libstd/time/duration.rs @@ -13,7 +13,9 @@ use ops::{Add, Sub, Mul, Div, AddAssign, SubAssign, MulAssign, DivAssign}; const NANOS_PER_SEC: u32 = 1_000_000_000; const NANOS_PER_MILLI: u32 = 1_000_000; +const NANOS_PER_MICROS: u32 = 1_000; const MILLIS_PER_SEC: u64 = 1_000; +const MICROS_PER_SEC: u64 = 1_000_000; /// A `Duration` type to represent a span of time, typically used for system /// timeouts. @@ -114,6 +116,27 @@ impl Duration { let secs = millis / MILLIS_PER_SEC; let nanos = ((millis % MILLIS_PER_SEC) as u32) * NANOS_PER_MILLI; Duration { secs: secs, nanos: nanos } + + /// Creates a new `Duration` from the specified number of microseconds. + /// + /// # Examples + /// + /// ``` + /// use std::time::Duration; + /// + /// let duration = Duration::from_micros(1_000_002); + /// + /// assert_eq!(1, duration.as_secs()); + /// assert_eq!(2000, duration.subsec_nanos()); + /// ``` + #[inline] + pub fn from_micros(micros: u64) -> Duration { + let secs = micros / MICROS_PER_SEC; + let nanos = ((micros % MICROS_PER_SEC) as u32) * NANOS_PER_MICRO; + Duration { + secs: secs, + nanos: nanos, + } } /// Returns the number of _whole_ seconds contained by this `Duration`.