Struct ev_slotmap::ReadHandle

pub struct ReadHandle<K, P, V> where
    K: Key<P>,  { /* fields omitted */ }

A handle that may be used to read from the concurrent slot map.

Implementations

impl<K, P, V> ReadHandle<K, P, V> where
    K: Key<P>, 

pub fn factory(&self) -> ReadHandleFactory<K, P, V>

Create a new Sync type that can produce additional ReadHandles for use in other threads.

impl<K, P, V> ReadHandle<K, P, V> where
    K: Key<P>, 

pub fn read(&self) -> Option<MapReadRef<'_, K, P, V>>

Take out a guarded live reference to the read side of the map.

This lets you perform more complex read operations on the map.

While the reference lives, the map cannot be refreshed.

If no refresh has happened, or the map has been destroyed, this function returns None.

See MapReadRef.

pub fn len(&self) -> usize

Returns the number of non-empty keys present in the map.

pub fn is_empty(&self) -> bool

Returns true if the map contains no non-empty keys.

pub fn get<'rh>(&'rh self, key: &K) -> Option<ReadGuard<'rh, V>>

Returns a guarded reference to the value corresponding to the key.

While the guard lives, the map cannot be refreshed.

If no writes have happened or if the write handle has been dropped, then None is returned here

pub fn is_destroyed(&self) -> bool

Returns true if the writer has destroyed this map (This happens when the writer is dropped).

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

Returns true if the map contains a value for the specified key.

Trait Implementations

impl<K, P, V> Clone for ReadHandle<K, P, V> where
    K: Key<P>, 

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<K, P, V> Debug for ReadHandle<K, P, V> where
    K: Debug + Key<P>, 

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

Formats the value using the given formatter.

impl<K, P, V> Drop for ReadHandle<K, P, V> where
    K: Key<P>, 

fn drop(&mut self)

Executes the destructor for this type.