pub fn wait_signal_many(
    targets: &[(Arc<dyn KernelObject>, Signal)],
) -> impl Future<Output = Vec<Signal>> {
    #[must_use = "wait_signal_many does nothing unless polled/`await`-ed"]
    struct SignalManyFuture {
        targets: Vec<(Arc<dyn KernelObject>, Signal)>,
        first: bool,
    }

    impl SignalManyFuture {
        fn happened(&self, current_signals: &[Signal]) -> bool {
            self.targets
                .iter()
                .zip(current_signals)
                .any(|(&(_, desired), &current)| !(current & desired).is_empty())
        }
    }

    impl Future for SignalManyFuture {
        type Output = Vec<Signal>;

        fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
            let current_signals: Vec<_> =
                self.targets.iter().map(|(obj, _)| obj.signal()).collect();
            if self.happened(&current_signals) {
                return Poll::Ready(current_signals);
            }
            if self.first {
                for (object, signal) in self.targets.iter() {
                    object.add_signal_callback(Box::new({
                        let signal = *signal;
                        let waker = cx.waker().clone();
                        move |s| {
                            if (s & signal).is_empty() {
                                return false;
                            }
                            waker.wake_by_ref();
                            true
                        }
                    }));
                }
                self.first = false;
            }
            Poll::Pending
        }
    }

    SignalManyFuture {
        targets: Vec::from(targets),
        first: true,
    }
}
/// Asynchronous wait signal for multiple objects.
Asynchronous wait signal for multiple objects.
Asynchronous wait signal for multiple objects .
pub fn wait_signal_many(
    targets: &[(Arc<dyn KernelObject>, Signal)],
) -> impl Future<Output = Vec<Signal>> {
    #[must_use = "wait_signal_many does nothing unless polled/`await`-ed"]
    struct SignalManyFuture {
        targets: Vec<(Arc<dyn KernelObject>, Signal)>,
        first: bool,
    }
    impl SignalManyFuture {
        fn happened(&self, current_signals: &[Signal]) -> bool {
            self.targets
                .iter()
                .zip(current_signals)
                .any(|(&(_, desired), &current)| !(current & desired).is_empty())
        }
    }
    impl Future for SignalManyFuture {
        type Output = Vec<Signal>;
        fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
            let current_signals: Vec<_> =
                self.targets.iter().map(|(obj, _)| obj.signal()).collect();
            if self.happened(&current_signals) {
                return Poll::Ready(current_signals);
            }
            if self.first {
                for (object, signal) in self.targets.iter() {
                    object.add_signal_callback(Box::new({
                        let signal = *signal;
                        let waker = cx.waker().clone();
                        move |s| {
                            if (s & signal).is_empty() {
                                return false;
                            }
                            waker.wake_by_ref();
                            true
                        }
                    }));
                }
                self.first = false;
            }
            Poll::Pending
        }
    }
    SignalManyFuture {
        targets: Vec::from(targets),
        first: true,
    }
}
pub fn wait_signal_many ( targets : & [ ( Arc < dyn KernelObject > , Signal ) ] , ) -> impl Future < Output = Vec < Signal > > { # [ must_use = " " ] struct SignalManyFuture { targets : Vec < ( Arc < dyn KernelObject > , Signal ) > , first : bool , } impl SignalManyFuture { fn happened ( & self , current_signals : & [ Signal ] ) -> bool { self . targets . iter ( ) . zip ( current_signals ) . any ( | ( & ( _ , desired ) , & current ) | ! ( current & desired ) . is_empty ( ) ) } } impl Future for SignalManyFuture { type Output = Vec < Signal > ; fn poll ( mut self : Pin < & mut Self > , cx : & mut Context < ' _ > ) -> Poll < Self :: Output > { let current_signals : Vec < _ > = self . targets . iter ( ) . map ( | ( obj , _ ) | obj . signal ( ) ) . collect ( ) ; if self . happened ( & current_signals ) { return Poll :: Ready ( current_signals ) ; } if self . first { for ( object , signal ) in self . targets . iter ( ) { object . add_signal_callback ( Box :: new ( { let signal = * signal ; let waker = cx . waker ( ) . clone ( ) ; move | s | { if ( s & signal ) . is_empty ( ) { return false ; } waker . wake_by_ref ( ) ; true } } ) ) ; } self . first = false ; } Poll :: Pending } } SignalManyFuture { targets : Vec :: from ( targets ) , first : true , } }
Asynchronous wait signal for multiple objects.
Asynchronous wait signal for multiple objects .
targets
&[(Arc<dyn KernelObject>, Signal)]
targets
&[(Arc<dyn KernelObject>, Signal)]