Struct locker::AsyncLocker

pub struct AsyncLocker<K, V = ()> { /* fields omitted */ }

Implementations

impl<K: Eq + Hash, V> AsyncLocker<K, V>

pub fn new_custom(
    default_mutex_func: impl Fn() -> V + Send + Sync + 'static
) -> Self

pub async fn get_mutex<'_>(&'_ self, key: K) -> Arc<Mutex<V>>

Return reference to existig Mutex or insert new one.

Locks the current task until it is able to return Mutex.

Examples

use std::time::Duration;
use locker::AsyncLocker;
use tokio::time::delay_for;

let default_mutex_value = "value";
let locker = AsyncLocker::<i32, &str>::new_custom(move || default_mutex_value);
let mutex = locker.get_mutex(1).await;
let _guard = mutex.lock().await; // lock
let locker_clone = locker.clone();
tokio::spawn(async move {
    let mutex = locker.get_mutex(1).await;
    let value = mutex.lock().await; // wait
    assert_eq!(default_mutex_value, *value);
});
delay_for(Duration::from_millis(200)).await;

Trait Implementations

impl<K: Clone, V: Clone> Clone for AsyncLocker<K, V>

fn clone(&self) -> AsyncLocker<K, V>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<K: Eq + Hash, V: Default> Default for AsyncLocker<K, V>

fn default() -> Self

Returns the "default value" for a type.