Trait wait_list::CancelCallback

pub trait CancelCallback<'wait_list, L: Lock, I, O>: Sized {
    fn on_cancel(self, list: LockedExclusive<'wait_list, L, I, O>, output: O);
}

A callback that is called in the event that the future has been woken but was cancelled before it could complete.

This trait is implemented for all functions and closures that accept a LockedExclusive<'wait_list, L, I, O> and an O, but is also available as a separate trait so you can implement it on concrete types.

Required Methods

fn on_cancel(self, list: LockedExclusive<'wait_list, L, I, O>, output: O)

Called when the future has been woken but was cancelled before it could complete.

It is given an exclusive lock to the associated WaitList as well as the output value that was not yielded by the future.

Implementors

impl<'wait_list, L: Lock, I, O, F> CancelCallback<'wait_list, L, I, O> for F where
    L: 'wait_list,
    I: 'wait_list,
    O: 'wait_list,
    F: FnOnce(LockedExclusive<'wait_list, L, I, O>, O),