38 lines
842 B
Rust
38 lines
842 B
Rust
use crate::StoreBackend;
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use core::fmt;
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/// expect this for any write operation to `NoFlash`
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub struct NoFlashError;
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impl fmt::Display for NoFlashError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "no flash")
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}
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}
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/// a valid `StoreBackend` that can be used for configurations lacking a flash
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#[derive(Debug, Clone, Copy)]
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pub struct NoFlash;
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impl StoreBackend for NoFlash {
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type Data = [u8; 0];
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fn data(&self) -> &Self::Data {
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&[]
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}
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type Error = NoFlashError;
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fn erase(&mut self) -> Result<(), Self::Error> {
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Err(NoFlashError)
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}
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fn program(&mut self, _: usize, _: &[u8]) -> Result<(), Self::Error> {
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Err(NoFlashError)
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}
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fn backup_space(&self) -> &'static mut [u8] {
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&mut []
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}
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}
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