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critical: don't let the ceiling token escape the critical section

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Jorge Aparicio 2017-04-19 15:03:49 -05:00
parent aee1d785a9
commit aee3c2b29b
2 changed files with 14 additions and 4 deletions
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4
src/lib.rs
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@ -238,12 +238,12 @@ where
/// No task can preempt this critical section
pub fn critical<R, F>(f: F) -> R
where
F: FnOnce(CMAX) -> R,
F: FnOnce(&CMAX) -> R,
{
let primask = ::cortex_m::register::primask::read();
::cortex_m::interrupt::disable();
let r = f(C { _marker: PhantomData });
let r = f(&C { _marker: PhantomData });
// If the interrupts were active before our `disable` call, then re-enable
// them. Otherwise, keep them disabled