Struct Hlc 

pub struct Hlc {
    pub physical_nanos: i64,
    pub logical: u32,
}

A Hybrid Logical Clock timestamp: a physical instant (nanoseconds) plus a logical counter that breaks ties and preserves causality when the physical clock stalls, jumps backward, or two events share a nanosecond. The total order is lexicographic (physical_nanos, logical) — so the derived Ord is the HLC order. This is the causally-consistent timestamp the SyncClock CRDT keys on: it stays monotonic and orders happens-before correctly even across machines whose wall clocks disagree (the bounded-skew / interplanetary case the campaign targets).

Fields

physical_nanos: i64

logical: u32

Implementations

impl Hlc

pub const ZERO: Hlc

The zero timestamp (before any event).

pub fn tick(self, now_nanos: i64) -> Hlc

Stamp a local event (or a send) given the current physical clock now_nanos. Advances the physical component to max(self, now); the logical counter increments when physical does not move (a stall or backward jump) and resets to 0 when it does.

pub fn recv(self, remote: Hlc, now_nanos: i64) -> Hlc

Stamp the receipt of a message carrying timestamp remote, at local physical clock now_nanos. Merges both clocks plus wall time, keeping the result strictly after both inputs (the HLC receive rule) so causality (send → receive) is always preserved.

Trait Implementations

impl Clone for Hlc

fn clone(&self) -> Hlc

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Hlc

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

Formats the value using the given formatter.

impl Hash for Hlc

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 Hlc

fn cmp(&self, other: &Hlc) -> 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.

impl PartialEq for Hlc

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Hlc

fn partial_cmp(&self, other: &Hlc) -> 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 Copy for Hlc

impl Eq for Hlc

impl StructuralPartialEq for Hlc