Struct TypedShard 

pub struct TypedShard<'a, K: Key, T: Send + Sync, C: Codec<T>, H: TypedWriteHook<K, T> = NoHook> { /* private fields */ }

Handle for atomic multi-key operations within a single shard. Obtained via TypedTree::atomic. The shard lock is held for the lifetime of this struct — keep the closure short.

Implementations

impl<K: Key, T: Send + Sync, C: Codec<T> + Sync, H: TypedWriteHook<K, T>> TypedShard<'_, K, T, C, H>

pub fn put(&mut self, key: &K, value: T) -> DbResult<Option<TypedRef<'_, T>>>

pub fn insert(&mut self, key: &K, value: T) -> DbResult<()>

pub fn delete(&mut self, key: &K) -> DbResult<Option<TypedRef<'_, T>>>

pub fn try_get(&self, key: &K) -> DbResult<Option<&T>>

pub fn get_or_err(&self, key: &K) -> DbResult<&T>

pub fn try_contains(&self, key: &K) -> DbResult<bool>

pub fn update( &mut self, key: &K, f: impl FnOnce(&T) -> T, ) -> DbResult<Option<TypedRef<'_, T>>>

Atomically read-modify-write the value for key. Returns Some(TypedRef) to the new value if the key existed, None otherwise.

pub fn fetch_update( &mut self, key: &K, f: impl FnOnce(&T) -> T, ) -> DbResult<Option<TypedRef<'_, T>>>

Like update, but returns Some(TypedRef) to the old value.