Struct std_prelude::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);

Methods

impl Duration

fn new(secs: u64, nanos: u32) -> Duration

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);

fn from_secs(secs: u64) -> Duration

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());

fn from_millis(millis: u64) -> Duration

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!(569000000, duration.subsec_nanos());

fn as_secs(&self) -> u64

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);

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);

fn subsec_nanos(&self) -> u32

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);

fn checked_add(self, rhs: Duration) -> Option<Duration>

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);

fn checked_sub(self, rhs: Duration) -> Option<Duration>

Checked Duration subtraction. Computes self - other, returning None if the result would be negative or if underflow 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);

fn checked_mul(self, rhs: u32) -> Option<Duration>

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);

fn checked_div(self, rhs: u32) -> Option<Duration>

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);

Trait Implementations

impl AddAssign<Duration> for Duration

fn add_assign(&mut self, rhs: Duration)

impl Debug for Duration

fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq<Duration> for Duration

fn eq(&self, __arg_0: &Duration) -> bool

fn ne(&self, __arg_0: &Duration) -> bool

impl Add<Duration> for Duration

type Output = Duration

fn add(self, rhs: Duration) -> Duration

impl Hash for Duration

fn hash<__H>(&self, __arg_0: &mut __H) where
    __H: Hasher, 

impl Eq for Duration

impl SubAssign<Duration> for Duration

fn sub_assign(&mut self, rhs: Duration)

impl Div<u32> for Duration

type Output = Duration

fn div(self, rhs: u32) -> Duration

impl PartialOrd<Duration> for Duration

fn partial_cmp(&self, __arg_0: &Duration) -> Option<Ordering>

fn lt(&self, __arg_0: &Duration) -> bool

fn le(&self, __arg_0: &Duration) -> bool

fn gt(&self, __arg_0: &Duration) -> bool

fn ge(&self, __arg_0: &Duration) -> bool

impl DivAssign<u32> for Duration

fn div_assign(&mut self, rhs: u32)

impl Clone for Duration

fn clone(&self) -> Duration

impl Copy for Duration

impl Ord for Duration

fn cmp(&self, __arg_0: &Duration) -> Ordering

impl Sub<Duration> for Duration

type Output = Duration

fn sub(self, rhs: Duration) -> Duration

impl Mul<u32> for Duration

type Output = Duration

fn mul(self, rhs: u32) -> Duration

impl MulAssign<u32> for Duration

fn mul_assign(&mut self, rhs: u32)

impl Sum<Duration> for Duration

fn sum<I>(iter: I) -> Duration where
    I: Iterator<Item = Duration>, 

impl<'a> Sum<&'a Duration> for Duration

fn sum<I>(iter: I) -> Duration where
    I: Iterator<Item = &'a Duration>, 

impl Default for Duration

fn default() -> Duration