Deleted vendor folder

1 files changed, 0 insertions, 543 deletions

diff --git a/vendor/flume/src/async.rs b/vendor/flume/src/async.rs
deleted file mode 100644
index fae44d4..0000000
--- a/vendor/flume/src/async.rs
+++ /dev/null
@@ -1,543 +0,0 @@
-//! Futures and other types that allow asynchronous interaction with channels.
-
-use std::{
-    future::Future,
-    pin::Pin,
-    task::{Context, Poll, Waker},
-    any::Any,
-    ops::Deref,
-};
-use crate::*;
-use futures_core::{stream::{Stream, FusedStream}, future::FusedFuture};
-use futures_sink::Sink;
-use spin1::Mutex as Spinlock;
-
-struct AsyncSignal {
-    waker: Spinlock<Waker>,
-    woken: AtomicBool,
-    stream: bool,
-}
-
-impl AsyncSignal {
-    fn new(cx: &Context, stream: bool) -> Self {
-        AsyncSignal {
-            waker: Spinlock::new(cx.waker().clone()),
-            woken: AtomicBool::new(false),
-            stream,
-        }
-    }
-}
-
-impl Signal for AsyncSignal {
-    fn fire(&self) -> bool {
-        self.woken.store(true, Ordering::SeqCst);
-        self.waker.lock().wake_by_ref();
-        self.stream
-    }
-
-    fn as_any(&self) -> &(dyn Any + 'static) { self }
-    fn as_ptr(&self) -> *const () { self as *const _ as *const () }
-}
-
-impl<T> Hook<T, AsyncSignal> {
-    // Update the hook to point to the given Waker.
-    // Returns whether the hook has been previously awakened
-    fn update_waker(&self, cx_waker: &Waker) -> bool {
-        let mut waker = self.1.waker.lock();
-        let woken = self.1.woken.load(Ordering::SeqCst);
-        if !waker.will_wake(cx_waker) {
-            *waker = cx_waker.clone();
-
-            // Avoid the edge case where the waker was woken just before the wakers were
-            // swapped.
-            if woken {
-                cx_waker.wake_by_ref();
-            }
-        }
-        woken
-    }
-}
-
-#[derive(Clone)]
-enum OwnedOrRef<'a, T> {
-    Owned(T),
-    Ref(&'a T),
-}
-
-impl<'a, T> Deref for OwnedOrRef<'a, T> {
-    type Target = T;
-
-    fn deref(&self) -> &T {
-        match self {
-            OwnedOrRef::Owned(arc) => &arc,
-            OwnedOrRef::Ref(r) => r,
-        }
-    }
-}
-
-impl<T> Sender<T> {
-    /// Asynchronously send a value into the channel, returning an error if all receivers have been
-    /// dropped. If the channel is bounded and is full, the returned future will yield to the async
-    /// runtime.
-    ///
-    /// In the current implementation, the returned future will not yield to the async runtime if the
-    /// channel is unbounded. This may change in later versions.
-    pub fn send_async(&self, item: T) -> SendFut<T> {
-        SendFut {
-            sender: OwnedOrRef::Ref(&self),
-            hook: Some(SendState::NotYetSent(item)),
-        }
-    }
-
-    /// Convert this sender into a future that asynchronously sends a single message into the channel,
-    /// returning an error if all receivers have been dropped. If the channel is bounded and is full,
-    /// this future will yield to the async runtime.
-    ///
-    /// In the current implementation, the returned future will not yield to the async runtime if the
-    /// channel is unbounded. This may change in later versions.
-    pub fn into_send_async<'a>(self, item: T) -> SendFut<'a, T> {
-        SendFut {
-            sender: OwnedOrRef::Owned(self),
-            hook: Some(SendState::NotYetSent(item)),
-        }
-    }
-
-    /// Create an asynchronous sink that uses this sender to asynchronously send messages into the
-    /// channel. The sender will continue to be usable after the sink has been dropped.
-    ///
-    /// In the current implementation, the returned sink will not yield to the async runtime if the
-    /// channel is unbounded. This may change in later versions.
-    pub fn sink(&self) -> SendSink<'_, T> {
-        SendSink(SendFut {
-            sender: OwnedOrRef::Ref(&self),
-            hook: None,
-        })
-    }
-
-    /// Convert this sender into a sink that allows asynchronously sending messages into the channel.
-    ///
-    /// In the current implementation, the returned sink will not yield to the async runtime if the
-    /// channel is unbounded. This may change in later versions.
-    pub fn into_sink<'a>(self) -> SendSink<'a, T> {
-        SendSink(SendFut {
-            sender: OwnedOrRef::Owned(self),
-            hook: None,
-        })
-    }
-}
-
-enum SendState<T> {
-    NotYetSent(T),
-    QueuedItem(Arc<Hook<T, AsyncSignal>>),
-}
-
-/// A future that sends a value into a channel.
-///
-/// Can be created via [`Sender::send_async`] or [`Sender::into_send_async`].
-#[must_use = "futures/streams/sinks do nothing unless you `.await` or poll them"]
-pub struct SendFut<'a, T> {
-    sender: OwnedOrRef<'a, Sender<T>>,
-    // Only none after dropping
-    hook: Option<SendState<T>>,
-}
-
-impl<T> std::marker::Unpin for SendFut<'_, T> {}
-
-impl<'a, T> SendFut<'a, T> {
-    /// Reset the hook, clearing it and removing it from the waiting sender's queue. This is called
-    /// on drop and just before `start_send` in the `Sink` implementation.
-    fn reset_hook(&mut self) {
-        if let Some(SendState::QueuedItem(hook)) = self.hook.take() {
-            let hook: Arc<Hook<T, dyn Signal>> = hook;
-            wait_lock(&self.sender.shared.chan).sending
-                .as_mut()
-                .unwrap().1
-                .retain(|s| s.signal().as_ptr() != hook.signal().as_ptr());
-        }
-    }
-
-    /// See [`Sender::is_disconnected`].
-    pub fn is_disconnected(&self) -> bool {
-        self.sender.is_disconnected()
-    }
-
-    /// See [`Sender::is_empty`].
-    pub fn is_empty(&self) -> bool {
-        self.sender.is_empty()
-    }
-
-    /// See [`Sender::is_full`].
-    pub fn is_full(&self) -> bool {
-        self.sender.is_full()
-    }
-
-    /// See [`Sender::len`].
-    pub fn len(&self) -> usize {
-        self.sender.len()
-    }
-
-    /// See [`Sender::capacity`].
-    pub fn capacity(&self) -> Option<usize> {
-        self.sender.capacity()
-    }
-}
-
-impl<'a, T> Drop for SendFut<'a, T> {
-    fn drop(&mut self) {
-        self.reset_hook()
-    }
-}
-
-
-impl<'a, T> Future for SendFut<'a, T> {
-    type Output = Result<(), SendError<T>>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        if let Some(SendState::QueuedItem(hook)) = self.hook.as_ref() {
-            if hook.is_empty() {
-                Poll::Ready(Ok(()))
-            } else if self.sender.shared.is_disconnected() {
-                let item = hook.try_take();
-                self.hook = None;
-                match item {
-                    Some(item) => Poll::Ready(Err(SendError(item))),
-                    None => Poll::Ready(Ok(())),
-                }
-            } else {
-                hook.update_waker(cx.waker());
-                Poll::Pending
-            }
-        } else if let Some(SendState::NotYetSent(item)) = self.hook.take() {
-            let this = self.get_mut();
-            let (shared, this_hook) = (&this.sender.shared, &mut this.hook);
-
-            shared.send(
-                // item
-                item,
-                // should_block
-                true,
-                // make_signal
-                |msg| Hook::slot(Some(msg), AsyncSignal::new(cx, false)),
-                // do_block
-                |hook| {
-                    *this_hook = Some(SendState::QueuedItem(hook));
-                    Poll::Pending
-                },
-            )
-                .map(|r| r.map_err(|err| match err {
-                    TrySendTimeoutError::Disconnected(msg) => SendError(msg),
-                    _ => unreachable!(),
-                }))
-        } else { // Nothing to do
-            Poll::Ready(Ok(()))
-        }
-    }
-}
-
-impl<'a, T> FusedFuture for SendFut<'a, T> {
-    fn is_terminated(&self) -> bool {
-        self.sender.shared.is_disconnected()
-    }
-}
-
-/// A sink that allows sending values into a channel.
-///
-/// Can be created via [`Sender::sink`] or [`Sender::into_sink`].
-pub struct SendSink<'a, T>(SendFut<'a, T>);
-
-impl<'a, T> SendSink<'a, T> {
-    /// Returns a clone of a sending half of the channel of this sink.
-    pub fn sender(&self) -> &Sender<T> {
-        &self.0.sender
-    }
-
-    /// See [`Sender::is_disconnected`].
-    pub fn is_disconnected(&self) -> bool {
-        self.0.is_disconnected()
-    }
-
-    /// See [`Sender::is_empty`].
-    pub fn is_empty(&self) -> bool {
-        self.0.is_empty()
-    }
-
-    /// See [`Sender::is_full`].
-    pub fn is_full(&self) -> bool {
-        self.0.is_full()
-    }
-
-    /// See [`Sender::len`].
-    pub fn len(&self) -> usize {
-        self.0.len()
-    }
-
-    /// See [`Sender::capacity`].
-    pub fn capacity(&self) -> Option<usize> {
-        self.0.capacity()
-    }
-
-    /// Returns whether the SendSinks are belong to the same channel.
-    pub fn same_channel(&self, other: &Self) -> bool {
-        self.sender().same_channel(other.sender())
-    }
-}
-
-impl<'a, T> Sink<T> for SendSink<'a, T> {
-    type Error = SendError<T>;
-
-    fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
-        Pin::new(&mut self.0).poll(cx)
-    }
-
-    fn start_send(mut self: Pin<&mut Self>, item: T) -> Result<(), Self::Error> {
-        self.0.reset_hook();
-        self.0.hook = Some(SendState::NotYetSent(item));
-
-        Ok(())
-    }
-
-    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
-        Pin::new(&mut self.0).poll(cx) // TODO: A different strategy here?
-    }
-
-    fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
-        Pin::new(&mut self.0).poll(cx) // TODO: A different strategy here?
-    }
-}
-
-impl<'a, T> Clone for SendSink<'a, T> {
-    fn clone(&self) -> SendSink<'a, T> {
-        SendSink(SendFut {
-            sender: self.0.sender.clone(),
-            hook: None,
-        })
-    }
-}
-
-impl<T> Receiver<T> {
-    /// Asynchronously receive a value from the channel, returning an error if all senders have been
-    /// dropped. If the channel is empty, the returned future will yield to the async runtime.
-    pub fn recv_async(&self) -> RecvFut<'_, T> {
-        RecvFut::new(OwnedOrRef::Ref(self))
-    }
-
-    /// Convert this receiver into a future that asynchronously receives a single message from the
-    /// channel, returning an error if all senders have been dropped. If the channel is empty, this
-    /// future will yield to the async runtime.
-    pub fn into_recv_async<'a>(self) -> RecvFut<'a, T> {
-        RecvFut::new(OwnedOrRef::Owned(self))
-    }
-
-    /// Create an asynchronous stream that uses this receiver to asynchronously receive messages
-    /// from the channel. The receiver will continue to be usable after the stream has been dropped.
-    pub fn stream(&self) -> RecvStream<'_, T> {
-        RecvStream(RecvFut::new(OwnedOrRef::Ref(self)))
-    }
-
-    /// Convert this receiver into a stream that allows asynchronously receiving messages from the channel.
-    pub fn into_stream<'a>(self) -> RecvStream<'a, T> {
-        RecvStream(RecvFut::new(OwnedOrRef::Owned(self)))
-    }
-}
-
-/// A future which allows asynchronously receiving a message.
-///
-/// Can be created via [`Receiver::recv_async`] or [`Receiver::into_recv_async`].
-#[must_use = "futures/streams/sinks do nothing unless you `.await` or poll them"]
-pub struct RecvFut<'a, T> {
-    receiver: OwnedOrRef<'a, Receiver<T>>,
-    hook: Option<Arc<Hook<T, AsyncSignal>>>,
-}
-
-impl<'a, T> RecvFut<'a, T> {
-    fn new(receiver: OwnedOrRef<'a, Receiver<T>>) -> Self {
-        Self {
-            receiver,
-            hook: None,
-        }
-    }
-
-    /// Reset the hook, clearing it and removing it from the waiting receivers queue and waking
-    /// another receiver if this receiver has been woken, so as not to cause any missed wakeups.
-    /// This is called on drop and after a new item is received in `Stream::poll_next`.
-    fn reset_hook(&mut self) {
-        if let Some(hook) = self.hook.take() {
-            let hook: Arc<Hook<T, dyn Signal>> = hook;
-            let mut chan = wait_lock(&self.receiver.shared.chan);
-            // We'd like to use `Arc::ptr_eq` here but it doesn't seem to work consistently with wide pointers?
-            chan.waiting.retain(|s| s.signal().as_ptr() != hook.signal().as_ptr());
-            if hook.signal().as_any().downcast_ref::<AsyncSignal>().unwrap().woken.load(Ordering::SeqCst) {
-                // If this signal has been fired, but we're being dropped (and so not listening to it),
-                // pass the signal on to another receiver
-                chan.try_wake_receiver_if_pending();
-            }
-        }
-    }
-
-    fn poll_inner(
-        self: Pin<&mut Self>,
-        cx: &mut Context,
-        stream: bool,
-    ) -> Poll<Result<T, RecvError>> {
-        if self.hook.is_some() {
-            match self.receiver.shared.recv_sync(None) {
-                Ok(msg) => return Poll::Ready(Ok(msg)),
-                Err(TryRecvTimeoutError::Disconnected) => {
-                    return Poll::Ready(Err(RecvError::Disconnected))
-                }
-                _ => (),
-            }
-
-            let hook = self.hook.as_ref().map(Arc::clone).unwrap();
-            if hook.update_waker(cx.waker()) {
-                // If the previous hook was awakened, we need to insert it back to the
-                // queue, otherwise, it remains valid.
-                wait_lock(&self.receiver.shared.chan)
-                    .waiting
-                    .push_back(hook);
-            }
-            // To avoid a missed wakeup, re-check disconnect status here because the channel might have
-            // gotten shut down before we had a chance to push our hook
-            if self.receiver.shared.is_disconnected() {
-                // And now, to avoid a race condition between the first recv attempt and the disconnect check we
-                // just performed, attempt to recv again just in case we missed something.
-                Poll::Ready(
-                    self.receiver
-                        .shared
-                        .recv_sync(None)
-                        .map(Ok)
-                        .unwrap_or(Err(RecvError::Disconnected)),
-                )
-            } else {
-                Poll::Pending
-            }
-        } else {
-            let mut_self = self.get_mut();
-            let (shared, this_hook) = (&mut_self.receiver.shared, &mut mut_self.hook);
-
-            shared.recv(
-                // should_block
-                true,
-                // make_signal
-                || Hook::trigger(AsyncSignal::new(cx, stream)),
-                // do_block
-                |hook| {
-                    *this_hook = Some(hook);
-                    Poll::Pending
-                },
-            )
-                .map(|r| r.map_err(|err| match err {
-                    TryRecvTimeoutError::Disconnected => RecvError::Disconnected,
-                    _ => unreachable!(),
-                }))
-        }
-    }
-
-    /// See [`Receiver::is_disconnected`].
-    pub fn is_disconnected(&self) -> bool {
-        self.receiver.is_disconnected()
-    }
-
-    /// See [`Receiver::is_empty`].
-    pub fn is_empty(&self) -> bool {
-        self.receiver.is_empty()
-    }
-
-    /// See [`Receiver::is_full`].
-    pub fn is_full(&self) -> bool {
-        self.receiver.is_full()
-    }
-
-    /// See [`Receiver::len`].
-    pub fn len(&self) -> usize {
-        self.receiver.len()
-    }
-
-    /// See [`Receiver::capacity`].
-    pub fn capacity(&self) -> Option<usize> {
-        self.receiver.capacity()
-    }
-}
-
-impl<'a, T> Drop for RecvFut<'a, T> {
-    fn drop(&mut self) {
-        self.reset_hook();
-    }
-}
-
-impl<'a, T> Future for RecvFut<'a, T> {
-    type Output = Result<T, RecvError>;
-
-    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        self.poll_inner(cx, false) // stream = false
-    }
-}
-
-impl<'a, T> FusedFuture for RecvFut<'a, T> {
-    fn is_terminated(&self) -> bool {
-        self.receiver.shared.is_disconnected() && self.receiver.shared.is_empty()
-    }
-}
-
-/// A stream which allows asynchronously receiving messages.
-///
-/// Can be created via [`Receiver::stream`] or [`Receiver::into_stream`].
-pub struct RecvStream<'a, T>(RecvFut<'a, T>);
-
-impl<'a, T> RecvStream<'a, T> {
-    /// See [`Receiver::is_disconnected`].
-    pub fn is_disconnected(&self) -> bool {
-        self.0.is_disconnected()
-    }
-
-    /// See [`Receiver::is_empty`].
-    pub fn is_empty(&self) -> bool {
-        self.0.is_empty()
-    }
-
-    /// See [`Receiver::is_full`].
-    pub fn is_full(&self) -> bool {
-        self.0.is_full()
-    }
-
-    /// See [`Receiver::len`].
-    pub fn len(&self) -> usize {
-        self.0.len()
-    }
-
-    /// See [`Receiver::capacity`].
-    pub fn capacity(&self) -> Option<usize> {
-        self.0.capacity()
-    }
-
-    /// Returns whether the SendSinks are belong to the same channel.
-    pub fn same_channel(&self, other: &Self) -> bool {
-        self.0.receiver.same_channel(&*other.0.receiver)
-    }
-}
-
-impl<'a, T> Clone for RecvStream<'a, T> {
-    fn clone(&self) -> RecvStream<'a, T> {
-        RecvStream(RecvFut::new(self.0.receiver.clone()))
-    }
-}
-
-impl<'a, T> Stream for RecvStream<'a, T> {
-    type Item = T;
-
-    fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
-        match Pin::new(&mut self.0).poll_inner(cx, true) { // stream = true
-            Poll::Pending => Poll::Pending,
-            Poll::Ready(item) => {
-                self.0.reset_hook();
-                Poll::Ready(item.ok())
-            }
-        }
-    }
-}
-
-impl<'a, T> FusedStream for RecvStream<'a, T> {
-    fn is_terminated(&self) -> bool {
-        self.0.is_terminated()
-    }
-}