Struct storage_map::StorageMap

pub struct StorageMap<L, M> { /* fields omitted */ }

StorageMap is a wrapper around HashMap that allows efficient concurrent access for the use case when only rarely the missing elements need to be created.

Methods

impl<L, K, V, S> StorageMap<L, HashMap<K, V, S>> where     L: RawRwLock,     K: Clone + Eq + Hash,     S: BuildHasher,

pub fn with_hasher(hash_builder: S) -> Self

Create a new storage map with the given hasher.

pub fn get_or_create_with<'a, F: FnOnce() -> V>(     &'a self,     key: &K,     create_fn: F ) -> StorageMapGuard<'a, L, V>

Get a value associated with the key. The method assumes that more often then not the value is already there. If it's not - the closure will be called to create one. This closure is expected to always produce the same value given the same key.

pub fn prepare_maybe<F: FnOnce() -> Option<V>>(     &self,     key: &K,     create_fn: F ) -> PrepareResult

Make sure the given key is in the map, as a way to warm up future run-time access to the map at the initialization stage.

Trait Implementations

impl<L: Send, M> Send for StorageMap<L, M>

impl<L: Sync, M> Sync for StorageMap<L, M>

impl<L: RawRwLock, M: Default> Default for StorageMap<L, M>

fn default() -> Self

Returns the "default value" for a type.

impl<L, M: Debug> Debug for StorageMap<L, M>

fn fmt(&self, formatter: &mut Formatter) -> Result

Formats the value using the given formatter.