1.3.0[][src]Struct core::time::Duration

pub struct Duration { /* fields omitted */ }

A Duration type to represent a span of time, typically used for system timeouts.

Each Duration is composed of a whole number of seconds and a fractional part represented in nanoseconds. If the underlying system does not support nanosecond-level precision, APIs binding a system timeout will typically round up the number of nanoseconds.

Durations implement many common traits, including Add, Sub, and other ops traits.

Examples

use std::time::Duration;

let five_seconds = Duration::new(5, 0);
let five_seconds_and_five_nanos = five_seconds + Duration::new(0, 5);

assert_eq!(five_seconds_and_five_nanos.as_secs(), 5);
assert_eq!(five_seconds_and_five_nanos.subsec_nanos(), 5);

let ten_millis = Duration::from_millis(10);Run

Methods

impl Duration
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Creates a new Duration from the specified number of whole seconds and additional nanoseconds.

If the number of nanoseconds is greater than 1 billion (the number of nanoseconds in a second), then it will carry over into the seconds provided.

Panics

This constructor will panic if the carry from the nanoseconds overflows the seconds counter.

Examples

use std::time::Duration;

let five_seconds = Duration::new(5, 0);Run

Creates a new Duration from the specified number of whole seconds.

Examples

use std::time::Duration;

let duration = Duration::from_secs(5);

assert_eq!(5, duration.as_secs());
assert_eq!(0, duration.subsec_nanos());Run

Creates a new Duration from the specified number of milliseconds.

Examples

use std::time::Duration;

let duration = Duration::from_millis(2569);

assert_eq!(2, duration.as_secs());
assert_eq!(569_000_000, duration.subsec_nanos());Run

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());Run

Creates a new Duration from the specified number of nanoseconds.

Examples

use std::time::Duration;

let duration = Duration::from_nanos(1_000_000_123);

assert_eq!(1, duration.as_secs());
assert_eq!(123, duration.subsec_nanos());Run

Returns the number of whole seconds contained by this Duration.

The returned value does not include the fractional (nanosecond) part of the duration, which can be obtained using subsec_nanos.

Examples

use std::time::Duration;

let duration = Duration::new(5, 730023852);
assert_eq!(duration.as_secs(), 5);Run

To determine the total number of seconds represented by the Duration, use as_secs in combination with subsec_nanos:

use std::time::Duration;

let duration = Duration::new(5, 730023852);

assert_eq!(5.730023852,
           duration.as_secs() as f64
           + duration.subsec_nanos() as f64 * 1e-9);Run

Returns the fractional part of this Duration, in whole milliseconds.

This method does not return the length of the duration when represented by milliseconds. The returned number always represents a fractional portion of a second (i.e. it is less than one thousand).

Examples

use std::time::Duration;

let duration = Duration::from_millis(5432);
assert_eq!(duration.as_secs(), 5);
assert_eq!(duration.subsec_millis(), 432);Run

Returns the fractional part of this Duration, in whole microseconds.

This method does not return the length of the duration when represented by microseconds. The returned number always represents a fractional portion of a second (i.e. it is less than one million).

Examples

use std::time::Duration;

let duration = Duration::from_micros(1_234_567);
assert_eq!(duration.as_secs(), 1);
assert_eq!(duration.subsec_micros(), 234_567);Run

Returns the fractional part of this Duration, in nanoseconds.

This method does not return the length of the duration when represented by nanoseconds. The returned number always represents a fractional portion of a second (i.e. it is less than one billion).

Examples

use std::time::Duration;

let duration = Duration::from_millis(5010);
assert_eq!(duration.as_secs(), 5);
assert_eq!(duration.subsec_nanos(), 10_000_000);Run

🔬 This is a nightly-only experimental API. (duration_as_u128 #50202)

Returns the total number of whole milliseconds contained by this Duration.

Examples

use std::time::Duration;

let duration = Duration::new(5, 730023852);
assert_eq!(duration.as_millis(), 5730);Run

🔬 This is a nightly-only experimental API. (duration_as_u128 #50202)

Returns the total number of whole microseconds contained by this Duration.

Examples

use std::time::Duration;

let duration = Duration::new(5, 730023852);
assert_eq!(duration.as_micros(), 5730023);Run

🔬 This is a nightly-only experimental API. (duration_as_u128 #50202)

Returns the total number of nanoseconds contained by this Duration.

Examples

use std::time::Duration;

let duration = Duration::new(5, 730023852);
assert_eq!(duration.as_nanos(), 5730023852);Run

Checked Duration addition. Computes self + other, returning None if overflow occurred.

Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(0, 0).checked_add(Duration::new(0, 1)), Some(Duration::new(0, 1)));
assert_eq!(Duration::new(1, 0).checked_add(Duration::new(std::u64::MAX, 0)), None);Run

Checked Duration subtraction. Computes self - other, returning None if the result would be negative or if overflow occurred.

Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(0, 1).checked_sub(Duration::new(0, 0)), Some(Duration::new(0, 1)));
assert_eq!(Duration::new(0, 0).checked_sub(Duration::new(0, 1)), None);Run

Checked Duration multiplication. Computes self * other, returning None if overflow occurred.

Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(0, 500_000_001).checked_mul(2), Some(Duration::new(1, 2)));
assert_eq!(Duration::new(std::u64::MAX - 1, 0).checked_mul(2), None);Run

Checked Duration division. Computes self / other, returning None if other == 0.

Examples

Basic usage:

use std::time::Duration;

assert_eq!(Duration::new(2, 0).checked_div(2), Some(Duration::new(1, 0)));
assert_eq!(Duration::new(1, 0).checked_div(2), Some(Duration::new(0, 500_000_000)));
assert_eq!(Duration::new(2, 0).checked_div(0), None);Run

🔬 This is a nightly-only experimental API. (duration_float #54361)

Returns the number of seconds contained by this Duration as f64.

The returned value does include the fractional (nanosecond) part of the duration.

Examples

#![feature(duration_float)]
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
assert_eq!(dur.as_float_secs(), 2.7);Run

🔬 This is a nightly-only experimental API. (duration_float #54361)

Creates a new Duration from the specified number of seconds.

Panics

This constructor will panic if secs is not finite, negative or overflows Duration.

Examples

#![feature(duration_float)]
use std::time::Duration;

let dur = Duration::from_float_secs(2.7);
assert_eq!(dur, Duration::new(2, 700_000_000));Run

🔬 This is a nightly-only experimental API. (duration_float #54361)

Multiply Duration by f64.

Panics

This method will panic if result is not finite, negative or overflows Duration.

Examples

#![feature(duration_float)]
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
assert_eq!(dur.mul_f64(3.14), Duration::new(8, 478_000_000));
assert_eq!(dur.mul_f64(3.14e5), Duration::new(847_800, 0));Run

🔬 This is a nightly-only experimental API. (duration_float #54361)

Divide Duration by f64.

Panics

This method will panic if result is not finite, negative or overflows Duration.

Examples

#![feature(duration_float)]
use std::time::Duration;

let dur = Duration::new(2, 700_000_000);
assert_eq!(dur.div_f64(3.14), Duration::new(0, 859_872_611));
// note that truncation is used, not rounding
assert_eq!(dur.div_f64(3.14e5), Duration::new(0, 8_598));Run

🔬 This is a nightly-only experimental API. (duration_float #54361)

Divide Duration by Duration and return f64.

Examples

#![feature(duration_float)]
use std::time::Duration;

let dur1 = Duration::new(2, 700_000_000);
let dur2 = Duration::new(5, 400_000_000);
assert_eq!(dur1.div_duration(dur2), 0.5);Run

Trait Implementations

impl Copy for Duration
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impl Add<Duration> for Duration
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The resulting type after applying the + operator.

impl Sub<Duration> for Duration
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The resulting type after applying the - operator.

impl Mul<u32> for Duration
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The resulting type after applying the * operator.

impl Mul<Duration> for u32
1.31.0
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The resulting type after applying the * operator.

impl Div<u32> for Duration
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The resulting type after applying the / operator.

impl AddAssign<Duration> for Duration
1.9.0
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impl SubAssign<Duration> for Duration
1.9.0
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impl MulAssign<u32> for Duration
1.9.0
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impl DivAssign<u32> for Duration
1.9.0
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impl PartialEq<Duration> for Duration
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impl Eq for Duration
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impl Ord for Duration
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Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

impl PartialOrd<Duration> for Duration
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impl Clone for Duration
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Performs copy-assignment from source. Read more

impl Default for Duration
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impl Sum<Duration> for Duration
1.16.0
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impl<'a> Sum<&'a Duration> for Duration
1.16.0
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impl Hash for Duration
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Feeds a slice of this type into the given [Hasher]. Read more

impl Debug for Duration
1.27.0
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Auto Trait Implementations

impl Send for Duration

impl Sync for Duration

Blanket Implementations

impl<T, U> Into for T where
    U: From<T>, 
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impl<T> From for T
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impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized
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impl<T> BorrowMut for T where
    T: ?Sized
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impl<T> Any for T where
    T: 'static + ?Sized
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