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pub use bare_metal::{CriticalSection, Mutex};
use register::mstatus;
#[inline]
pub unsafe fn disable() {
match () {
#[cfg(riscv)]
() => mstatus::clear_mie(),
#[cfg(not(riscv))]
() => unimplemented!(),
}
}
#[inline]
pub unsafe fn enable() {
match () {
#[cfg(riscv)]
() => mstatus::set_mie(),
#[cfg(not(riscv))]
() => unimplemented!(),
}
}
#[inline]
pub fn free<F, R>(f: F) -> R
where
F: FnOnce(&CriticalSection) -> R,
{
let mstatus = mstatus::read();
unsafe {
disable();
}
let r = f(unsafe { &CriticalSection::new() });
if mstatus.mie() {
unsafe {
enable();
}
}
r
}