swaitsandClaude Opus 4.6
3102fc747a
Implement full SSD1306 OLED display support: - Splash screen on boot (1.5s) with project name, version, board - Dashboard showing radio state, config, counters, RSSI/SNR - RSSI history sparkline (64-sample ring buffer, 2px-wide bars) - DisplayOn/DisplayOff host commands routed via dedicated channel - Pure render functions against generic DrawTarget (no hardware coupling) - Display on/off control bypasses radio task entirely Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
61 lines
1.3 KiB
Rust
61 lines
1.3 KiB
Rust
use super::assert_future;
|
|
use core::pin::Pin;
|
|
use futures_core::future::{FusedFuture, Future};
|
|
use futures_core::task::{Context, Poll};
|
|
|
|
/// Future for the [`lazy`] function.
|
|
#[derive(Debug)]
|
|
#[must_use = "futures do nothing unless you `.await` or poll them"]
|
|
pub struct Lazy<F> {
|
|
f: Option<F>,
|
|
}
|
|
|
|
// safe because we never generate `Pin<&mut F>`
|
|
impl<F> Unpin for Lazy<F> {}
|
|
|
|
/// Creates a new future that allows delayed execution of a closure.
|
|
///
|
|
/// The provided closure is only run once the future is polled.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```
|
|
/// # futures::executor::block_on(async {
|
|
/// use futures::future;
|
|
///
|
|
/// let a = future::lazy(|_| 1);
|
|
/// assert_eq!(a.await, 1);
|
|
///
|
|
/// let b = future::lazy(|_| -> i32 {
|
|
/// panic!("oh no!")
|
|
/// });
|
|
/// drop(b); // closure is never run
|
|
/// # });
|
|
/// ```
|
|
pub fn lazy<F, R>(f: F) -> Lazy<F>
|
|
where
|
|
F: FnOnce(&mut Context<'_>) -> R,
|
|
{
|
|
assert_future::<R, _>(Lazy { f: Some(f) })
|
|
}
|
|
|
|
impl<F, R> FusedFuture for Lazy<F>
|
|
where
|
|
F: FnOnce(&mut Context<'_>) -> R,
|
|
{
|
|
fn is_terminated(&self) -> bool {
|
|
self.f.is_none()
|
|
}
|
|
}
|
|
|
|
impl<F, R> Future for Lazy<F>
|
|
where
|
|
F: FnOnce(&mut Context<'_>) -> R,
|
|
{
|
|
type Output = R;
|
|
|
|
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<R> {
|
|
Poll::Ready((self.f.take().expect("Lazy polled after completion"))(cx))
|
|
}
|
|
}
|