Struct ShutdownSignal 

pub struct ShutdownSignal { /* private fields */ }

Future that resolves when shutdown is triggered.

Registers (and updates) a waker on every poll so that ShutdownHandle::trigger() (or a signal handler) can wake the awaiting task directly. The waker is overwritten on each poll to handle the case where the future is re-polled from a different task context.

Single waiter only. Only one task may await ShutdownSignal at a time. If a second task polls while a waker is already registered, the waker is replaced (not duplicated). For multi-waiter shutdown, use CancellationToken instead.

Holds a raw pointer to the AtomicBool flag, valid for the lifetime of the Runtime (which outlives block_on which outlives all tasks).

Trait Implementations

impl Future for ShutdownSignal

type Output = ()

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<()>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.