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>
73 lines
1.3 KiB
Rust
73 lines
1.3 KiB
Rust
// Extracted from the scopeguard crate
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use core::{
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mem::ManuallyDrop,
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ops::{Deref, DerefMut},
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ptr,
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};
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pub struct ScopeGuard<T, F>
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where
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F: FnMut(&mut T),
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{
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dropfn: F,
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value: T,
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}
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#[inline]
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pub fn guard<T, F>(value: T, dropfn: F) -> ScopeGuard<T, F>
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where
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F: FnMut(&mut T),
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{
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ScopeGuard { dropfn, value }
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}
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impl<T, F> ScopeGuard<T, F>
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where
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F: FnMut(&mut T),
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{
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#[inline]
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pub fn into_inner(guard: Self) -> T {
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// Cannot move out of Drop-implementing types, so
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// ptr::read the value out of a ManuallyDrop<Self>
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// Don't use mem::forget as that might invalidate value
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let guard = ManuallyDrop::new(guard);
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unsafe {
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let value = ptr::read(&guard.value);
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// read the closure so that it is dropped
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let _ = ptr::read(&guard.dropfn);
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value
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}
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}
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}
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impl<T, F> Deref for ScopeGuard<T, F>
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where
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F: FnMut(&mut T),
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{
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type Target = T;
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#[inline]
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fn deref(&self) -> &T {
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&self.value
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}
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}
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impl<T, F> DerefMut for ScopeGuard<T, F>
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where
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F: FnMut(&mut T),
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{
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#[inline]
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fn deref_mut(&mut self) -> &mut T {
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&mut self.value
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}
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}
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impl<T, F> Drop for ScopeGuard<T, F>
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where
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F: FnMut(&mut T),
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{
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#[inline]
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fn drop(&mut self) {
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(self.dropfn)(&mut self.value);
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}
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}
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