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#![allow(dead_code)]
const SRAM_LOWER: usize = 0x2000_0000;
const SRAM_UPPER: usize = 0x3000_0000;
/// Does this slice reside entirely within RAM?
pub(crate) fn slice_in_ram<T>(slice: *const [T]) -> bool {
if slice.is_empty() {
return true;
}
let ptr = slice as *const T as usize;
ptr >= SRAM_LOWER && (ptr + slice.len() * core::mem::size_of::<T>()) < SRAM_UPPER
}
/// Return an error if slice is not in RAM. Skips check if slice is zero-length.
pub(crate) fn slice_in_ram_or<T, E>(slice: *const [T], err: E) -> Result<(), E> {
if slice_in_ram(slice) {
Ok(())
} else {
Err(err)
}
}
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