[][src]Struct sgx_tstd::time::Instant

pub struct Instant(_);

A measurement of a monotonically nondecreasing clock. Opaque and useful only with Duration.

Instants are always guaranteed to be no less than any previously measured instant when created, and are often useful for tasks such as measuring benchmarks or timing how long an operation takes.

Note, however, that instants are not guaranteed to be steady. In other words, each tick of the underlying clock may not be the same length (e.g. some seconds may be longer than others). An instant may jump forwards or experience time dilation (slow down or speed up), but it will never go backwards.

Instants are opaque types that can only be compared to one another. There is no method to get "the number of seconds" from an instant. Instead, it only allows measuring the duration between two instants (or comparing two instants).

The size of an Instant struct may vary depending on the target operating system.

Methods

impl Instant[src]

pub fn duration_since(&self, earlier: Instant) -> Duration[src]

Returns the amount of time elapsed from another instant to this one.

Panics

This function will panic if earlier is later than self.

pub fn checked_duration_since(&self, earlier: Instant) -> Option<Duration>[src]

Returns the amount of time elapsed from another instant to this one, or None if that instant is later than this one.

pub fn saturating_duration_since(&self, earlier: Instant) -> Duration[src]

Returns the amount of time elapsed from another instant to this one, or zero duration if that instant is later than this one.

pub fn checked_add(&self, duration: Duration) -> Option<Instant>[src]

Returns Some(t) where t is the time self + duration if t can be represented as Instant (which means it's inside the bounds of the underlying data structure), None otherwise.

pub fn checked_sub(&self, duration: Duration) -> Option<Instant>[src]

Returns Some(t) where t is the time self - duration if t can be represented as Instant (which means it's inside the bounds of the underlying data structure), None otherwise.

pub fn get_tup(&self) -> (i64, i64)[src]

Return a tup (sec, nsec)

Trait Implementations

impl Add<Duration> for Instant[src]

type Output = Instant

The resulting type after applying the + operator.

fn add(self, other: Duration) -> Instant[src]

Panics

This function may panic if the resulting point in time cannot be represented by the underlying data structure. See checked_add for a version without panic.

impl AddAssign<Duration> for Instant[src]

impl Clone for Instant[src]

impl Copy for Instant[src]

impl Debug for Instant[src]

impl Eq for Instant[src]

impl Hash for Instant[src]

impl InstantEx for Instant[src]

fn now() -> Instant[src]

Returns an instant corresponding to "now".

fn elapsed(&self) -> Duration[src]

Returns the amount of time elapsed since this instant was created.

Panics

This function may panic if the current time is earlier than this instant, which is something that can happen if an Instant is produced synthetically.

impl Ord for Instant[src]

impl PartialEq<Instant> for Instant[src]

impl PartialOrd<Instant> for Instant[src]

impl StructuralEq for Instant[src]

impl StructuralPartialEq for Instant[src]

impl Sub<Duration> for Instant[src]

type Output = Instant

The resulting type after applying the - operator.

impl Sub<Instant> for Instant[src]

type Output = Duration

The resulting type after applying the - operator.

impl SubAssign<Duration> for Instant[src]

Auto Trait Implementations

impl RefUnwindSafe for Instant

impl Send for Instant

impl Sync for Instant

impl Unpin for Instant

impl UnwindSafe for Instant

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> ToOwned for T where
    T: Clone
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type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.