rtic_common/
dropper.rs

1//! A drop implementation runner.
2
3use core::ops::{Deref, DerefMut};
4
5pub(crate) struct OnDropWith<T, F: FnMut(&mut T)>(T, F);
6
7/// Runs a closure on drop.
8pub struct OnDrop<F: FnOnce()> {
9    f: core::mem::MaybeUninit<F>,
10}
11
12impl<F: FnOnce()> OnDrop<F> {
13    /// Make a new droppper given a closure.
14    pub fn new(f: F) -> Self {
15        Self {
16            f: core::mem::MaybeUninit::new(f),
17        }
18    }
19
20    /// Make it not run drop.
21    pub fn defuse(self) {
22        core::mem::forget(self)
23    }
24}
25
26impl<F: FnOnce()> Drop for OnDrop<F> {
27    fn drop(&mut self) {
28        unsafe { self.f.as_ptr().read()() }
29    }
30}
31
32impl<T, F: FnMut(&mut T)> OnDropWith<T, F> {
33    pub(crate) fn new(value: T, f: F) -> Self {
34        Self(value, f)
35    }
36
37    pub(crate) fn execute(&mut self) {
38        (self.1)(&mut self.0);
39    }
40}
41
42impl<T, F: FnMut(&mut T)> Deref for OnDropWith<T, F> {
43    type Target = T;
44
45    fn deref(&self) -> &Self::Target {
46        &self.0
47    }
48}
49
50impl<T, F: FnMut(&mut T)> DerefMut for OnDropWith<T, F> {
51    fn deref_mut(&mut self) -> &mut Self::Target {
52        &mut self.0
53    }
54}
55
56impl<T, F: FnMut(&mut T)> Drop for OnDropWith<T, F> {
57    fn drop(&mut self) {
58        self.execute();
59    }
60}
rtic_common/dropper.rs

rtic_common/
dropper.rs
