[−][src]Function futures::executor::with_notify
pub fn with_notify<F, T, R>(notify: &T, id: usize, f: F) -> R where
F: FnOnce() -> R,
T: Clone + Into<NotifyHandle>,
Sets the NotifyHandle
of the current task for the duration of the provided
closure.
This function takes a type that can be converted into a notify handle,
notify
and id
, and a closure f
. The closure f
will be executed such
that calls to task::current()
will store a reference to the notify handle
provided, not the one previously in the environment.
Note that calls to task::current()
in the closure provided will not be
equivalent to task::current()
before this method is called. The two tasks
returned will notify different handles, and the task handles pulled out
during the duration of this closure will not notify the previous task. It's
recommended that you call task::current()
in some capacity before calling
this function to ensure that calls to task::current()
inside of this
closure can transitively wake up the outer task.
Panics
This function will panic if it is called outside the context of a future's
task. This is only valid to call once you've already entered a future via
Spawn::poll_*
functions.