Struct CounterMap 

pub struct CounterMap { /* private fields */ }

Implementations

impl CounterMap

pub const fn new() -> CounterMap

pub fn get(&self, key: &[u8]) -> Option<u32>

The stored value for key, if any.

pub fn set(&mut self, key: &[u8], value: u32) -> Result<bool, MapFull>

Upsert key to value. Returns whether the map changed (an equal-value overwrite is a no-op, so callers can skip a flush).

pub fn clear(&mut self)

Drop every entry (factory clear).

pub fn prune_tx_except(&mut self, keep: &[u8; 32]) -> bool

Drop TX-boundary entries belonging to any identity other than keep and report whether anything was removed. TX contexts are the MAC’s raw 32-byte identity public key; every other context format (the 39-byte mac.rx: form) is left alone.

pub fn len(&self) -> usize

pub fn encode(&self, out: &mut [u8]) -> Option<usize>

Serialize into out (sized ENCODED_MAX or larger); returns the encoded length. Layout per entry: key length (1 byte), key, little-endian u32 value.

pub fn decode(payload: &[u8]) -> Option<CounterMap>

Parse a persisted payload. Anything malformed — truncated entries, oversized keys, more entries than capacity — yields None, and the mount treats the journal as empty (counters reseed, which is the safe direction for TX boundaries).

Trait Implementations

impl Clone for CounterMap

fn clone(&self) -> CounterMap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CounterMap

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

Formats the value using the given formatter.

impl Default for CounterMap

fn default() -> CounterMap

Returns the “default value” for a type.

impl PartialEq for CounterMap

fn eq(&self, other: &CounterMap) -> 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 Eq for CounterMap

impl StructuralPartialEq for CounterMap