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>
57 lines
1.3 KiB
Rust
57 lines
1.3 KiB
Rust
//! Types for controlling when drop is invoked.
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use core::mem;
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use core::mem::MaybeUninit;
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/// A type to delay the drop handler invocation.
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#[must_use = "to delay the drop handler invocation to the end of the scope"]
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pub struct OnDrop<F: FnOnce()> {
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f: MaybeUninit<F>,
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}
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impl<F: FnOnce()> OnDrop<F> {
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/// Create a new instance.
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pub fn new(f: F) -> Self {
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Self { f: MaybeUninit::new(f) }
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}
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/// Prevent drop handler from running.
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pub fn defuse(self) {
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mem::forget(self)
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}
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}
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impl<F: FnOnce()> Drop for OnDrop<F> {
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fn drop(&mut self) {
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unsafe { self.f.as_ptr().read()() }
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}
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}
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/// An explosive ordinance that panics if it is improperly disposed of.
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///
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/// This is to forbid dropping futures, when there is absolutely no other choice.
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///
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/// To correctly dispose of this device, call the [defuse](struct.DropBomb.html#method.defuse)
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/// method before this object is dropped.
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#[must_use = "to delay the drop bomb invokation to the end of the scope"]
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pub struct DropBomb {
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_private: (),
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}
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impl DropBomb {
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/// Create a new instance.
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pub fn new() -> Self {
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Self { _private: () }
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}
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/// Defuses the bomb, rendering it safe to drop.
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pub fn defuse(self) {
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mem::forget(self)
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}
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}
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impl Drop for DropBomb {
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fn drop(&mut self) {
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panic!("boom")
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}
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}
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