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pub use bare_metal::{CriticalSection, Mutex, Nr};
#[inline]
pub fn disable() {
match () {
#[cfg(all(cortex_m, feature = "inline-asm"))]
() => unsafe {
asm!("cpsid i" ::: "memory" : "volatile");
},
#[cfg(all(cortex_m, not(feature = "inline-asm")))]
() => unsafe {
extern "C" {
fn __cpsid();
}
__cpsid();
},
#[cfg(not(cortex_m))]
() => unimplemented!(),
}
}
#[inline]
pub unsafe fn enable() {
match () {
#[cfg(all(cortex_m, feature = "inline-asm"))]
() => asm!("cpsie i" ::: "memory" : "volatile"),
#[cfg(all(cortex_m, not(feature = "inline-asm")))]
() => {
extern "C" {
fn __cpsie();
}
__cpsie();
}
#[cfg(not(cortex_m))]
() => unimplemented!(),
}
}
pub fn free<F, R>(f: F) -> R
where
F: FnOnce(&CriticalSection) -> R,
{
let primask = ::register::primask::read();
disable();
let r = f(unsafe { &CriticalSection::new() });
if primask.is_active() {
unsafe { enable() }
}
r
}