Struct PnCounter 

pub struct PnCounter {
    pub p: HashMap<PeerId, u64>,
    pub n: HashMap<PeerId, u64>,
}

PN-counter (positive/negative counter).

Fields

p: HashMap<PeerId, u64>

Per-peer positive increments.

n: HashMap<PeerId, u64>

Per-peer negative decrements.

Implementations

impl PnCounter

pub fn new() -> Self

Build an empty counter.

pub fn change(&mut self, peer: impl Into<PeerId>, amount: i64)

Increment by amount (signed) attributed to peer. Each peer is the authoritative writer for its own slot so concurrent writes commute.

pub fn value(&self) -> i64

Current value.

pub fn merge(&mut self, other: &Self)

Merge another counter in-place. Each (peer, side) slot takes the max of the two values — the standard PN-counter merge.

Trait Implementations

impl Clone for PnCounter

fn clone(&self) -> PnCounter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PnCounter

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

Formats the value using the given formatter.

impl Default for PnCounter

fn default() -> PnCounter

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PnCounter

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PnCounter

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

where __S: Serializer,

Serialize this value into the given Serde serializer.