Go to Rust: 04 initial RwLock trait

runtime.rs

use std::ops::{Deref, DerefMut};

pub trait Runtime: Locker {}

/// The [AsyncRwLock::read] and [AsyncRwLock::write] functions must return
/// actual async-aware lock guards that maintain the lock until they are out of
/// scope. They must not block the thread while holding the lock.
pub trait AsyncRwLock<T> {
    fn new(item: T) -> Self;
    fn read(
        &self,
    ) -> impl std::future::Future<Output = impl Deref<Target = T> + Sync + Send> + Send;
    fn write(
        &self,
    ) -> impl std::future::Future<Output = impl DerefMut<Target = T> + Sync + Send> + Send;
}

pub trait Locker {
    fn new_lock<T: Sync + Send>(item: T) -> impl AsyncRwLock<T>;
}