stm32f1_hal/common/
holder.rs

1use super::{
2    atomic_cell::AtomicCellMember,
3    fugit::{Duration, Rate},
4};
5use core::cell::UnsafeCell;
6
7/// Don't use it if the value changes frequently.
8/// And mind that you may get member data from different version.
9/// You'd better use something like atomic.
10pub struct StaticHolder<T: Copy> {
11    inner: UnsafeCell<T>,
12}
13
14unsafe impl<T: Copy> Sync for StaticHolder<T> {}
15
16impl<T: Copy> StaticHolder<T> {
17    pub const fn new(v: T) -> Self {
18        Self {
19            inner: UnsafeCell::new(v),
20        }
21    }
22
23    #[inline]
24    pub fn set(&self, v: T) {
25        critical_section::with(|_| {
26            *self.get_inner() = v;
27        });
28    }
29
30    /// # Safety
31    ///
32    /// You may get member data from different version.
33    #[inline]
34    pub unsafe fn get(&self) -> &T {
35        self.get_inner()
36    }
37
38    #[inline]
39    #[allow(clippy::mut_from_ref)]
40    fn get_inner(&self) -> &mut T {
41        unsafe { &mut *self.inner.get() }
42    }
43}
44
45impl<const NOM: u32, const DENOM: u32> AtomicCellMember for Duration<u32, NOM, DENOM> {
46    #[inline(always)]
47    fn to_num(self) -> usize {
48        self.ticks() as usize
49    }
50
51    #[inline(always)]
52    unsafe fn from_num(value: usize) -> Self {
53        Self::from_ticks(value as u32)
54    }
55}
56
57impl<const NOM: u32, const DENOM: u32> AtomicCellMember for Rate<u32, NOM, DENOM> {
58    #[inline(always)]
59    fn to_num(self) -> usize {
60        self.raw() as usize
61    }
62
63    #[inline(always)]
64    unsafe fn from_num(value: usize) -> Self {
65        Self::from_raw(value as u32)
66    }
67}
stm32f1_hal/common/holder.rs

stm32f1_hal/common/
holder.rs
