schedule(after:_:)

Schedules work to run once after duration elapses, then returns immediately.

func schedule(after duration: Duration, _ work: @escaping @Sendable () -> Void)

Parameters

duration: How long to wait. Negative or zero durations fire on the next loop iteration.
work: Closure to invoke. Runs in the loop’s callback context.

Mentioned In

Embedding a C Library in Swift Package Manager
Getting Started with Event in Swift
Production Considerations

Discussion

Wraps libevent’s event_base_once(3) with EV_TIMEOUT. The closure runs on whichever task next drives the loop (via run() or any Socket / ServerSocket operation that calls runOnce() internally). If nothing drives the loop before the deadline, the callback is queued but does not fire until something does.

See Also

sleep(for:) for an async shape that suspends the calling task.