Struct LogicalTime 

pub struct LogicalTime(/* private fields */);

Represents an absolute point in time in nanoseconds. Parts of this API are largely inspired by std::time::Duration. This could go to 128 bits if we need more than ~585 years of nanosecond precision.

Implementations

impl LogicalTime

pub const ZERO: LogicalTime

0 integer nanoseconds.

pub const MAX: LogicalTime

The maximum representable integer nanoseconds.

pub const INDEFINITE: LogicalTime = LogicalTime::MAX

The sentinel deadline for a wait that has no deadline.

A pause(2) blocks until a signal arrives and can never time out, so it registers this value rather than a real deadline. The saturating Add impls below also land here when a guest arms an absurdly far-future timer (issue #219), which is the same situation: a deadline that can never be reached while virtual time remains representable.

Callers that fast-forward virtual time to a pending deadline must check LogicalTime::is_indefinite first. Jumping the global clock onto this value would both destroy the continuity of virtual time (a ~584-year step) and wake a waiter that Linux would have left blocked.

pub fn is_indefinite(&self) -> bool

Is this the LogicalTime::INDEFINITE sentinel, i.e. “no deadline”?

pub fn as_micros(&self) -> u64

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

pub fn as_millis(&self) -> u64

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

pub fn as_nanos(&self) -> u64

Returns the total number of nanoseconds contained by this LogicalTime.

pub fn as_secs(&self) -> u64

Returns the total number of whole seconds contained by this LogicalTime. The returned value does not include fractional (nanosecond) part of the duration, which can be obtained using subsec_nanos.

pub fn from_micros(micros: u64) -> Self

Creates a new LogicalTime from the specified number of microseconds.

pub fn from_millis(millis: u64) -> Self

Creates a new LogicalTime from the specified number of milliseconds.

pub fn from_nanos(nanos: u64) -> Self

Creates a new LogicalTime from the specified number of nanoseconds.

pub fn from_big_nanos(nanos: u128) -> Self

Creates a new LogicalTime from the specified number of nanoseconds.

pub fn from_secs(secs: u64) -> Self

Creates a new LogicalTime from the specified number of seconds.

pub fn subsec_micros(&self) -> u32

Returns the fractional part of this LogicalTime, in 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).

pub fn subsec_millis(&self) -> u32

Returns the fractional part of this LogicalTime, in 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).

pub fn subsec_nanos(&self) -> u32

Returns the fractional part of this LogicalTime, 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).

pub fn from_rcbs(n: u64) -> Self

Convert a number of Retired Conditional Branches (RCBs) to Nanoseconds

pub fn into_rcbs(self) -> u64

Inverse of from_rcbs. Non-injective, as it loses information, truncating to a coarser grained unit of time.

pub fn into_rcbs_with_multiplier(self, multiplier: f64) -> u64

Convert a virtual duration to RCBs after applying a logical clock multiplier.

pub fn is_zero(&self) -> bool

Test if the quantity is zero nanoseconds.

pub fn duration_since(&self, from: LogicalTime) -> Duration

Measure the duration of the time interval since a previous time.

Trait Implementations

impl Add for LogicalTime

type Output = LogicalTime

The resulting type after applying the + operator.

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

Performs the + operation.

impl Add<Duration> for LogicalTime

type Output = LogicalTime

The resulting type after applying the + operator.

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

Performs the + operation.

impl Add<u128> for LogicalTime

type Output = LogicalTime

The resulting type after applying the + operator.

fn add(self, rhs: u128) -> Self

Performs the + operation.

impl Clone for LogicalTime

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for LogicalTime

impl Debug for LogicalTime

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LogicalTime

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for LogicalTime

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for LogicalTime

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for LogicalTime

impl From<LogicalTime> for Timespec

fn from(logical_time: LogicalTime) -> Timespec

Converts to this type from the input type.

impl From<LogicalTime> for Timeval

fn from(logical_time: LogicalTime) -> Timeval

Converts to this type from the input type.

impl Hash for LogicalTime

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for LogicalTime

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for LogicalTime

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for LogicalTime

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for LogicalTime

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LogicalTime

impl Sub for LogicalTime

type Output = LogicalTime

The resulting type after applying the - operator.

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

Performs the - operation.