Struct LedgerHead 

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

The seq of the last record the city has broadcast, readable without a lock.

An atomic rather than a field behind the views’ lock, because a reader may hold the views for a long time and a hello must not wait for it. Stores the seq plus one, so zero is a ledger with no record.

Implementations

impl LedgerHead

pub fn at(head_seq: Option<Seq>) -> Self

pub fn advance(&self, seq: Seq)

Moves the head to seq. A seq of u64::MAX has no successor to store and leaves the head where it was; a ledger reaches it only after Seq::next has refused every later record.

pub fn read(&self) -> Option<Seq>

Trait Implementations

impl Debug for LedgerHead

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

Formats the value using the given formatter.

impl Default for LedgerHead

fn default() -> Self

Returns the “default value” for a type.