sel4_driver_interfaces/
lib.rs

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1//
2// Copyright 2024, Colias Group, LLC
3//
4// SPDX-License-Identifier: BSD-2-Clause
5//
6
7#![no_std]
8
9use core::cell::{RefCell, RefMut};
10use core::fmt;
11use core::ops::{Deref, DerefMut};
12
13use lock_api::{Mutex, RawMutex};
14
15pub mod block;
16pub mod net;
17pub mod rtc;
18pub mod serial;
19pub mod timer;
20
21pub trait HandleInterrupt {
22    fn handle_interrupt(&mut self);
23}
24
25// // //
26
27#[derive(Debug, Copy, Clone, PartialOrd, Ord, PartialEq, Eq, Hash, Default)]
28pub struct WrappedRefCell<T>(pub T);
29
30impl<T> WrappedRefCell<T> {
31    pub(crate) fn try_borrow_mut<E, U>(&self) -> Result<RefMut<U>, WrappedRefCellError<E>>
32    where
33        T: Deref<Target = RefCell<U>>,
34    {
35        self.0
36            .deref()
37            .try_borrow_mut()
38            .map_err(|_| WrappedRefCellError::Contention)
39    }
40
41    pub(crate) fn with_mut<E, U, V>(
42        &self,
43        f: impl FnOnce(&mut U) -> Result<V, E>,
44    ) -> Result<V, WrappedRefCellError<E>>
45    where
46        T: Deref<Target = RefCell<U>>,
47    {
48        Ok(f(self.try_borrow_mut()?.deref_mut())?)
49    }
50}
51
52#[derive(Debug, Copy, Clone, PartialOrd, Ord, PartialEq, Eq, Hash)]
53pub enum WrappedRefCellError<E> {
54    Contention,
55    Other(E),
56}
57
58impl<E> From<E> for WrappedRefCellError<E> {
59    fn from(err: E) -> Self {
60        Self::Other(err)
61    }
62}
63
64impl<E: fmt::Display> fmt::Display for WrappedRefCellError<E> {
65    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
66        match self {
67            Self::Contention => write!(f, "contention"),
68            Self::Other(err) => err.fmt(f),
69        }
70    }
71}
72
73#[derive(Debug, Copy, Clone, PartialOrd, Ord, PartialEq, Eq, Hash, Default)]
74pub struct WrappedMutex<T>(pub T);
75
76impl<T> WrappedMutex<T> {
77    pub(crate) fn with_mut<R: RawMutex, E, U, V>(
78        &self,
79        f: impl FnOnce(&mut U) -> Result<V, E>,
80    ) -> Result<V, E>
81    where
82        T: Deref<Target = Mutex<R, U>>,
83    {
84        f(self.0.lock().deref_mut())
85    }
86}
sel4_driver_interfaces/lib.rs

sel4_driver_interfaces/
lib.rs
