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use derive_new::new; use educe::Educe; use futures::{ready, Stream}; use pin_project::pin_project; use serde::{Deserialize, Serialize}; use serde_closure::traits::FnMut; use std::{ marker::PhantomData, pin::Pin, task::{Context, Poll} }; use super::{ DistributedPipe, DistributedSink, ParallelPipe, ParallelSink, Reducer, ReducerProcessSend, ReducerSend }; use crate::{pipe::Sink, pool::ProcessSend}; #[derive(new)] #[must_use] pub struct All<P, F> { pipe: P, f: F, } impl<P: ParallelPipe<Item>, Item, F> ParallelSink<Item> for All<P, F> where F: FnMut<(P::Output,), Output = bool> + Clone + Send + 'static, { type Done = bool; type Pipe = P; type ReduceA = AllReducer<P::Output, F>; type ReduceC = BoolAndReducer; fn reducers(self) -> (Self::Pipe, Self::ReduceA, Self::ReduceC) { (self.pipe, AllReducer(self.f, PhantomData), BoolAndReducer) } } impl<P: DistributedPipe<Item>, Item, F> DistributedSink<Item> for All<P, F> where F: FnMut<(P::Output,), Output = bool> + Clone + ProcessSend + 'static, { type Done = bool; type Pipe = P; type ReduceA = AllReducer<P::Output, F>; type ReduceB = BoolAndReducer; type ReduceC = BoolAndReducer; fn reducers(self) -> (Self::Pipe, Self::ReduceA, Self::ReduceB, Self::ReduceC) { ( self.pipe, AllReducer(self.f, PhantomData), BoolAndReducer, BoolAndReducer, ) } } #[derive(Educe, Serialize, Deserialize)] #[educe(Clone(bound = "F: Clone"))] #[serde( bound(serialize = "F: Serialize"), bound(deserialize = "F: Deserialize<'de>") )] pub struct AllReducer<Item, F>(F, PhantomData<fn() -> Item>); impl<Item, F> Reducer<Item> for AllReducer<Item, F> where F: FnMut<(Item,), Output = bool>, { type Done = bool; type Async = AllReducerAsync<Item, F>; fn into_async(self) -> Self::Async { AllReducerAsync(self.0, true, PhantomData) } } impl<Item, F> ReducerProcessSend<Item> for AllReducer<Item, F> where F: FnMut<(Item,), Output = bool>, { type Done = bool; } impl<Item, F> ReducerSend<Item> for AllReducer<Item, F> where F: FnMut<(Item,), Output = bool>, { type Done = bool; } #[pin_project] #[derive(Serialize, Deserialize)] #[serde( bound(serialize = "F: Serialize"), bound(deserialize = "F: Deserialize<'de>") )] pub struct AllReducerAsync<Item, F>(F, bool, PhantomData<fn() -> Item>); impl<Item, F> Sink<Item> for AllReducerAsync<Item, F> where F: FnMut<(Item,), Output = bool>, { type Done = bool; #[inline(always)] fn poll_forward( self: Pin<&mut Self>, cx: &mut Context, mut stream: Pin<&mut impl Stream<Item = Item>>, ) -> Poll<Self::Done> { let self_ = self.project(); while *self_.1 { if let Some(item) = ready!(stream.as_mut().poll_next(cx)) { *self_.1 = *self_.1 && self_.0.call_mut((item,)); } else { break; } } Poll::Ready(*self_.1) } } #[derive(Clone, Serialize, Deserialize)] pub struct BoolAndReducer; impl Reducer<bool> for BoolAndReducer { type Done = bool; type Async = BoolAndReducerAsync; fn into_async(self) -> Self::Async { BoolAndReducerAsync(true) } } impl ReducerProcessSend<bool> for BoolAndReducer { type Done = bool; } impl ReducerSend<bool> for BoolAndReducer { type Done = bool; } #[pin_project] pub struct BoolAndReducerAsync(bool); impl Sink<bool> for BoolAndReducerAsync { type Done = bool; #[inline(always)] fn poll_forward( mut self: Pin<&mut Self>, cx: &mut Context, mut stream: Pin<&mut impl Stream<Item = bool>>, ) -> Poll<Self::Done> { while self.0 { if let Some(item) = ready!(stream.as_mut().poll_next(cx)) { self.0 = self.0 && item; } else { break; } } Poll::Ready(self.0) } }