kernel/time/hrtimer/
pin.rs1use super::HasHrTimer;
4use super::HrTimer;
5use super::HrTimerCallback;
6use super::HrTimerHandle;
7use super::HrTimerMode;
8use super::RawHrTimerCallback;
9use super::UnsafeHrTimerPointer;
10use core::pin::Pin;
11
12pub struct PinHrTimerHandle<'a, T>
15where
16 T: HasHrTimer<T>,
17{
18 pub(crate) inner: Pin<&'a T>,
19}
20
21unsafe impl<'a, T> HrTimerHandle for PinHrTimerHandle<'a, T>
24where
25 T: HasHrTimer<T>,
26{
27 fn cancel(&mut self) -> bool {
28 let self_ptr: *const T = self.inner.get_ref();
29
30 let timer_ptr = unsafe { <T as HasHrTimer<T>>::raw_get_timer(self_ptr) };
33
34 unsafe { HrTimer::<T>::raw_cancel(timer_ptr) }
37 }
38}
39
40impl<'a, T> Drop for PinHrTimerHandle<'a, T>
41where
42 T: HasHrTimer<T>,
43{
44 fn drop(&mut self) {
45 self.cancel();
46 }
47}
48
49unsafe impl<'a, T> UnsafeHrTimerPointer for Pin<&'a T>
52where
53 T: Send + Sync,
54 T: HasHrTimer<T>,
55 T: HrTimerCallback<Pointer<'a> = Self>,
56{
57 type TimerMode = <T as HasHrTimer<T>>::TimerMode;
58 type TimerHandle = PinHrTimerHandle<'a, T>;
59
60 unsafe fn start(
61 self,
62 expires: <<T as HasHrTimer<T>>::TimerMode as HrTimerMode>::Expires,
63 ) -> Self::TimerHandle {
64 let self_ptr: *const T = self.get_ref();
66
67 unsafe { T::start(self_ptr, expires) };
72
73 PinHrTimerHandle { inner: self }
74 }
75}
76
77impl<'a, T> RawHrTimerCallback for Pin<&'a T>
78where
79 T: HasHrTimer<T>,
80 T: HrTimerCallback<Pointer<'a> = Self>,
81{
82 type CallbackTarget<'b> = Self;
83
84 unsafe extern "C" fn run(ptr: *mut bindings::hrtimer) -> bindings::hrtimer_restart {
85 let timer_ptr = ptr.cast::<HrTimer<T>>();
87
88 let receiver_ptr = unsafe { T::timer_container_of(timer_ptr) };
91
92 let receiver_ref = unsafe { &*receiver_ptr };
101
102 let receiver_pin = unsafe { Pin::new_unchecked(receiver_ref) };
105
106 T::run(receiver_pin).into_c()
107 }
108}