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pub use bare_metal::{CriticalSection, Mutex, Nr};
#[inline]
pub fn disable() {
cfg_if::cfg_if! {
if #[cfg(target_arch = "avr")] {
unsafe { llvm_asm!("cli" :::: "volatile") };
} else {
unimplemented!()
}
}
}
#[inline]
pub unsafe fn enable() {
cfg_if::cfg_if! {
if #[cfg(target_arch = "avr")] {
llvm_asm!("sei" :::: "volatile");
} else {
unimplemented!()
}
}
}
pub fn free<F, R>(f: F) -> R
where
F: FnOnce(&CriticalSection) -> R,
{
cfg_if::cfg_if! {
if #[cfg(target_arch = "avr")] {
let sreg: u8;
unsafe {
llvm_asm!("in $0,0x3F" :"=r"(sreg) ::: "volatile");
}
disable();
let r = f(unsafe { &CriticalSection::new() });
if sreg & 0x80 != 0x00 {
unsafe { enable(); }
}
r
} else {
let _ = f;
unimplemented!()
}
}
}