Struct async_executors::iface::JoinHandle [−][src]
pub struct JoinHandle<T> { /* fields omitted */ }
Expand description
A framework agnostic JoinHandle type. Cancels the future on dropping the handle.
You can call detach
to leave the future running when dropping the handle.
This leverages the performance gains from the native join handles compared to RemoteHandle where possible.
It does wrap futures in Abortable where needed as async-std’s canceling is asynchronous, which we can’t call during drop.
Panics
There is an inconsistency between executors when it comes to a panicking task.
Generally we unwind the thread on which the handle is awaited when a task panics,
but async-std will also let the executor working thread unwind. No catch_unwind
was added to
bring async-std in line with the other executors here.
Awaiting the JoinHandle can also panic if you drop the executor before it completes.
Implementations
Make a wrapper around tokio::task::JoinHandle
.
Make a wrapper around [async_global_executor::Task
].
pub fn async_std(
handle: AsyncStdJoinHandle<Result<T, Aborted>>,
a_handle: AbortHandle
) -> Self
pub fn async_std(
handle: AsyncStdJoinHandle<Result<T, Aborted>>,
a_handle: AbortHandle
) -> Self
Make a wrapper around async_std::task::JoinHandle
. The task needs to
be wrapped in an abortable so we can cancel it on drop.
Make a wrapper around futures_util::future::RemoteHandle
.
Trait Implementations
Auto Trait Implementations
impl<T> !RefUnwindSafe for JoinHandle<T>
impl<T> Send for JoinHandle<T> where
T: Send,
impl<T> Sync for JoinHandle<T> where
T: Send,
impl<T> Unpin for JoinHandle<T>
impl<T> !UnwindSafe for JoinHandle<T>
Blanket Implementations
Mutably borrows from an owned value. Read more
A convenience for calling Future::poll()
on !
Unpin
types.
Returns the result of self
or other
future, preferring self
if both are ready. Read more
Returns the result of self
or other
future, with no preference if both are ready. Read more
fn catch_unwind(self) -> CatchUnwind<Self> where
Self: UnwindSafe,
fn catch_unwind(self) -> CatchUnwind<Self> where
Self: UnwindSafe,
Catches panics while polling the future. Read more
Boxes the future and changes its type to dyn Future + Send + 'a
. Read more
Map this future’s output to a different type, returning a new future of the resulting type. Read more
Map this future’s output to a different type, returning a new future of the resulting type. Read more
Chain on a computation for when a future finished, passing the result of
the future to the provided closure f
. Read more
Wrap this future in an Either
future, making it the left-hand variant
of that Either
. Read more
Wrap this future in an Either
future, making it the right-hand variant
of that Either
. Read more
Convert this future into a single element stream. Read more
Flatten the execution of this future when the output of this future is itself another future. Read more
Flatten the execution of this future when the successful result of this future is a stream. Read more
Fuse a future such that poll
will never again be called once it has
completed. This method can be used to turn any Future
into a
FusedFuture
. Read more
Do something with the output of a future before passing it on. Read more
Catches unwinding panics while polling the future. Read more
Create a cloneable handle to this future where all handles will resolve to the same result. Read more
Turn this future into a future that yields ()
on completion and sends
its output to another future on a separate task. Read more
Wrap the future in a Box, pinning it. Read more
Wrap the future in a Box, pinning it. Read more
Turns a Future<Output = T>
into a
TryFuture<Ok = T, Error = ()
>. Read more
Turns a Future<Output = T>
into a
TryFuture<Ok = T, Error = Never
>. Read more
A convenience for calling Future::poll
on Unpin
future types.
Evaluates and consumes the future, returning the resulting output if
the future is ready after the first call to Future::poll
. Read more
Returns a Future that delays execution for a specified time. Read more
fn flatten(self) -> FlattenFuture<Self, <Self::Output as IntoFuture>::Future> where
Self::Output: IntoFuture,
fn flatten(self) -> FlattenFuture<Self, <Self::Output as IntoFuture>::Future> where
Self::Output: IntoFuture,
Flatten out the execution of this future when the result itself can be converted into another future. Read more
Waits for one of two similarly-typed futures to complete. Read more
Waits for one of two similarly-typed fallible futures to complete. Read more
Waits for two similarly-typed futures to complete. Read more
Waits for two similarly-typed fallible futures to complete. Read more
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
into_future
)The output that the future will produce on completion.
type Future = F
type Future = F
into_future
)Which kind of future are we turning this into?
into_future
)Creates a future from a value.
type Future = T
type Future = T
Which kind of future are we turning this into?
Create a future from a value
fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where
Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::Error == Self::Error,
fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where
Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::Error == Self::Error,
Flattens the execution of this future when the successful result of this
future is a [Sink
]. Read more
Maps this future’s success value to a different value. Read more
fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> where
F: FnOnce(Self::Ok) -> T,
E: FnOnce(Self::Error) -> T,
fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> where
F: FnOnce(Self::Ok) -> T,
E: FnOnce(Self::Error) -> T,
Maps this future’s success value to a different value, and permits for error handling resulting in the same type. Read more
Maps this future’s error value to a different value. Read more
Executes another future after this one resolves successfully. The success value is passed to a closure to create this subsequent future. Read more
Executes another future if this one resolves to an error. The error value is passed to a closure to create this subsequent future. Read more
Do something with the success value of a future before passing it on. Read more
Do something with the error value of a future before passing it on. Read more
fn try_flatten(self) -> TryFlatten<Self, Self::Ok> where
Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
fn try_flatten(self) -> TryFlatten<Self, Self::Ok> where
Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
Flatten the execution of this future when the successful result of this future is another future. Read more
fn try_flatten_stream(self) -> TryFlattenStream<Self> where
Self::Ok: TryStream,
<Self::Ok as TryStream>::Error == Self::Error,
fn try_flatten_stream(self) -> TryFlattenStream<Self> where
Self::Ok: TryStream,
<Self::Ok as TryStream>::Error == Self::Error,
Flatten the execution of this future when the successful result of this future is a stream. Read more
fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where
F: FnOnce(Self::Error) -> Self::Ok,
fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where
F: FnOnce(Self::Error) -> Self::Ok,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more