Struct ConstMapShard 

pub struct ConstMapShard<'a, K: Key + Send + Sync + Hash + Eq, const V: usize, H: WriteHook<K> = NoHook> { /* private fields */ }

Handle for atomic multi-key operations within a single shard. Obtained via ConstMap::atomic. The shard + index locks are held for the lifetime of this struct — keep the closure short.

Implementations

impl<K: Key + Send + Sync + Hash + Eq, const V: usize, H: WriteHook<K>> ConstMapShard<'_, K, V, H>

pub fn put(&mut self, key: &K, value: &[u8; V]) -> DbResult<Option<[u8; V]>>

pub fn insert(&mut self, key: &K, value: &[u8; V]) -> DbResult<()>

pub fn delete(&mut self, key: &K) -> DbResult<Option<[u8; V]>>

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

pub fn get_or_err(&self, key: &K) -> DbResult<[u8; V]>

pub fn contains(&self, key: &K) -> bool