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feat: improve InternallyMutable

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This commit is contained in:
əlemi 2024-08-08 21:55:52 +02:00
parent f14a8c40a5
commit 0ca5165b73
Signed by: alemi
GPG key ID: A4895B84D311642C
1 changed files with 17 additions and 5 deletions
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22
src/buffer/tools.rs
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@ -51,26 +51,38 @@ pub async fn select_buffer(
/// wraps sender and receiver to allow mutable field with immutable ref /// wraps sender and receiver to allow mutable field with immutable ref
#[derive(Debug)] #[derive(Debug)]
pub struct InternallyMutable<T: Clone> { pub struct InternallyMutable<T> {
getter: tokio::sync::watch::Receiver<T>, getter: tokio::sync::watch::Receiver<T>,
setter: tokio::sync::watch::Sender<T>, setter: tokio::sync::watch::Sender<T>,
} }
impl<T: Clone + Default> Default for InternallyMutable<T> { impl<T: Default> Default for InternallyMutable<T> {
fn default() -> Self { fn default() -> Self {
let (tx, rx) = tokio::sync::watch::channel(T::default()); Self::new(T::default())
}
}
impl<T> InternallyMutable<T> {
pub fn new(init: T) -> Self {
let (tx, rx) = tokio::sync::watch::channel(init);
InternallyMutable { InternallyMutable {
getter: rx, getter: rx,
setter: tx, setter: tx,
} }
} }
}
impl<T: Clone> InternallyMutable<T> {
pub fn set(&self, state: T) -> T { pub fn set(&self, state: T) -> T {
self.setter.send_replace(state) self.setter.send_replace(state)
} }
pub async fn wait(&self) {
let mut new = self.getter.clone();
new.changed().await; // first time unlocks immediately
new.changed().await;
}
}
impl<T: Clone> InternallyMutable<T> {
pub fn get(&self) -> T { pub fn get(&self) -> T {
self.getter.borrow().clone() self.getter.borrow().clone()
} }