Struct kernel::io::Promise
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[src]
pub struct Promise<T>(_);
A computation that might eventually resolve to a value of type T.
Methods
impl<T: 'static> Promise<T>
fn new(d: Deferred<T>) -> Self
Creates a promise from a kernel Deferred object. The promise is resolved once the deferred is resolved.
fn resolved(value: T) -> Self
Creates a promise from a constant value. The promise is resolved immediately.
fn get(self) -> T
Blocks until the promise is resolved, then returns the value within.
fn try_get(self) -> Result<T, Self>
Attempts to get the value inside the promise.
If the promise is resolved, consumes the promise and returns Some(value). Otherwise,
returns Err containing the original promise.
fn then<U, F: FnOnce(T) -> U + 'static>(self, f: F) -> Promise<U>
Returns a new promise that applies a function to the value inside the promise.