use crate::AQueue;
use std::cell::UnsafeCell;
use std::future::Future;
use std::ops::Deref;
use std::sync::Arc;
pub struct InnerStore<T>(UnsafeCell<T>);
unsafe impl<T> Sync for InnerStore<T> {}
unsafe impl<T> Send for InnerStore<T> {}
impl<T> InnerStore<T> {
#[inline]
fn new(x: T) -> InnerStore<T> {
InnerStore(UnsafeCell::new(x))
}
#[inline]
#[allow(clippy::mut_from_ref)]
pub fn get_mut(&self) -> &mut T {
unsafe { &mut *self.0.get() }
}
#[inline]
pub fn get(&self) -> &T {
unsafe { &*self.0.get() }
}
}
pub struct Actor<I> {
inner: Arc<InnerStore<I>>,
queue: AQueue,
}
impl<I: Default> Default for Actor<I> {
fn default() -> Self {
Self {
inner: Arc::new(InnerStore::new(Default::default())),
queue: AQueue::new(),
}
}
}
pub struct RefInner<'a, T: ?Sized> {
value: &'a T,
}
impl<T: ?Sized> Deref for RefInner<'_, T> {
type Target = T;
fn deref(&self) -> &Self::Target {
self.value
}
}
impl<I: 'static> Actor<I> {
#[inline]
pub fn new(x: I) -> Actor<I> {
Actor {
inner: Arc::new(InnerStore::new(x)),
queue: AQueue::new(),
}
}
#[inline]
pub async fn inner_call<T, R>(&self, call: impl FnOnce(Arc<InnerStore<I>>) -> T) -> R
where
T: Future<Output = R>,
{
self.queue.run(call, self.inner.clone()).await
}
#[inline]
pub unsafe fn deref_inner(&self) -> RefInner<'_, I> {
RefInner { value: self.inner.get() }
}
}