Struct signal_hook::iterator::Async

pub struct Async { /* fields omitted */ }

An asynchronous stream of registered signals.

It is created by converting Signals. See Signals::into_async.

Cloning

If you register multiple signals, then create multiple Signals instances by cloning and convert them to Async, one of them can „steal“ wakeups for several signals at once. This one will produce the signals while the others will be silent.

This has an effect if the one consumes them slowly or is dropped after the first one.

It is recommended not to clone the Signals instances and keep just one Async stream around.

Implementations

impl Async

pub fn new(signals: Signals, handle: &Handle) -> Result<Self, Error>

Creates a new Async.

Trait Implementations

impl Debug for Async

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Stream for Async

type Item = c_int

The type of item this stream will yield on success.

type Error = Error

The type of error this stream may generate.

pub fn poll(&mut self) -> Poll<Option<c_int>, Self::Error>

Attempt to pull out the next value of this stream, returning None if the stream is finished.

pub fn wait(self) -> Wait<Self>

Creates an iterator which blocks the current thread until each item of this stream is resolved.

pub fn into_future(self) -> StreamFuture<Self>

Converts this stream into a Future.

pub fn map<U, F>(self, f: F) -> Map<Self, F> where
    F: FnMut(Self::Item) -> U, 

Converts a stream of type T to a stream of type U.

pub fn map_err<U, F>(self, f: F) -> MapErr<Self, F> where
    F: FnMut(Self::Error) -> U, 

Converts a stream of error type T to a stream of error type U.

pub fn filter<F>(self, f: F) -> Filter<Self, F> where
    F: FnMut(&Self::Item) -> bool, 

Filters the values produced by this stream according to the provided predicate.

pub fn filter_map<F, B>(self, f: F) -> FilterMap<Self, F> where
    F: FnMut(Self::Item) -> Option<B>, 

Filters the values produced by this stream while simultaneously mapping them to a different type.

pub fn then<F, U>(self, f: F) -> Then<Self, F, U> where
    U: IntoFuture,
    F: FnMut(Result<Self::Item, Self::Error>) -> U, 

Chain on a computation for when a value is ready, passing the resulting item to the provided closure f.

pub fn and_then<F, U>(self, f: F) -> AndThen<Self, F, U> where
    U: IntoFuture<Error = Self::Error>,
    F: FnMut(Self::Item) -> U, 

Chain on a computation for when a value is ready, passing the successful results to the provided closure f.

pub fn or_else<F, U>(self, f: F) -> OrElse<Self, F, U> where
    U: IntoFuture<Item = Self::Item>,
    F: FnMut(Self::Error) -> U, 

Chain on a computation for when an error happens, passing the erroneous result to the provided closure f.

pub fn collect(self) -> Collect<Self>

Collect all of the values of this stream into a vector, returning a future representing the result of that computation.

pub fn concat2(self) -> Concat2<Self> where
    Self::Item: Extend<<Self::Item as IntoIterator>::Item>,
    Self::Item: IntoIterator,
    Self::Item: Default, 

Concatenate all results of a stream into a single extendable destination, returning a future representing the end result.

pub fn concat(self) -> Concat<Self> where
    Self::Item: Extend<<Self::Item as IntoIterator>::Item>,
    Self::Item: IntoIterator, 

👎 Deprecated since 0.1.14:

please use Stream::concat2 instead

Concatenate all results of a stream into a single extendable destination, returning a future representing the end result.

pub fn fold<F, T, Fut>(self, init: T, f: F) -> Fold<Self, F, Fut, T> where
    F: FnMut(T, Self::Item) -> Fut,
    Fut: IntoFuture<Item = T>,
    Self::Error: From<<Fut as IntoFuture>::Error>, 

Execute an accumulating computation over a stream, collecting all the values into one final result.

pub fn flatten(self) -> Flatten<Self> where
    Self::Item: Stream,
    <Self::Item as Stream>::Error: From<Self::Error>, 

Flattens a stream of streams into just one continuous stream.

pub fn skip_while<P, R>(self, pred: P) -> SkipWhile<Self, P, R> where
    P: FnMut(&Self::Item) -> R,
    R: IntoFuture<Item = bool, Error = Self::Error>, 

Skip elements on this stream while the predicate provided resolves to true.

pub fn take_while<P, R>(self, pred: P) -> TakeWhile<Self, P, R> where
    P: FnMut(&Self::Item) -> R,
    R: IntoFuture<Item = bool, Error = Self::Error>, 

Take elements from this stream while the predicate provided resolves to true.

pub fn for_each<F, U>(self, f: F) -> ForEach<Self, F, U> where
    U: IntoFuture<Item = (), Error = Self::Error>,
    F: FnMut(Self::Item) -> U, 

Runs this stream to completion, executing the provided closure for each element on the stream.

pub fn from_err<E>(self) -> FromErr<Self, E> where
    E: From<Self::Error>, 

Map this stream's error to any error implementing From for this stream's Error, returning a new stream.

pub fn take(self, amt: u64) -> Take<Self>

Creates a new stream of at most amt items of the underlying stream.

pub fn skip(self, amt: u64) -> Skip<Self>

Creates a new stream which skips amt items of the underlying stream.

pub fn fuse(self) -> Fuse<Self>

Fuse a stream such that poll will never again be called once it has finished.

pub fn by_ref(&mut self) -> &mut Self

Borrows a stream, rather than consuming it.

pub fn catch_unwind(self) -> CatchUnwind<Self> where
    Self: UnwindSafe, 

Catches unwinding panics while polling the stream.

pub fn buffered(self, amt: usize) -> Buffered<Self> where
    Self::Item: IntoFuture,
    <Self::Item as IntoFuture>::Error == Self::Error, 

An adaptor for creating a buffered list of pending futures.

pub fn buffer_unordered(self, amt: usize) -> BufferUnordered<Self> where
    Self::Item: IntoFuture,
    <Self::Item as IntoFuture>::Error == Self::Error, 

An adaptor for creating a buffered list of pending futures (unordered).

pub fn merge<S>(self, other: S) -> Merge<Self, S> where
    S: Stream<Error = Self::Error>, 

👎 Deprecated:

functionality provided by select now

An adapter for merging the output of two streams.

pub fn zip<S>(self, other: S) -> Zip<Self, S> where
    S: Stream<Error = Self::Error>, 

An adapter for zipping two streams together.

pub fn chain<S>(self, other: S) -> Chain<Self, S> where
    S: Stream<Item = Self::Item, Error = Self::Error>, 

Adapter for chaining two stream.

pub fn peekable(self) -> Peekable<Self>

Creates a new stream which exposes a peek method.

pub fn chunks(self, capacity: usize) -> Chunks<Self>

An adaptor for chunking up items of the stream inside a vector.

pub fn select<S>(self, other: S) -> Select<Self, S> where
    S: Stream<Item = Self::Item, Error = Self::Error>, 

Creates a stream that selects the next element from either this stream or the provided one, whichever is ready first.

pub fn forward<S>(self, sink: S) -> Forward<Self, S> where
    S: Sink<SinkItem = Self::Item>,
    Self::Error: From<<S as Sink>::SinkError>, 

A future that completes after the given stream has been fully processed into the sink, including flushing.

pub fn split(self) -> (SplitSink<Self>, SplitStream<Self>) where
    Self: Sink, 

Splits this Stream + Sink object into separate Stream and Sink objects.

pub fn inspect<F>(self, f: F) -> Inspect<Self, F> where
    F: FnMut(&Self::Item), 

Do something with each item of this stream, afterwards passing it on.

pub fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
    F: FnMut(&Self::Error), 

Do something with the error of this stream, afterwards passing it on.