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mod sealed {
pub trait Dmb {
unsafe fn __dmb(&self);
}
pub trait Dsb {
unsafe fn __dsb(&self);
}
pub trait Isb {
unsafe fn __isb(&self);
}
}
macro_rules! dmb_dsb {
($A:ident) => {
impl sealed::Dmb for $A {
#[inline(always)]
unsafe fn __dmb(&self) {
asm!(concat!("DMB ", stringify!($A)) : : : "memory" : "volatile")
}
}
impl sealed::Dsb for $A {
#[inline(always)]
unsafe fn __dsb(&self) {
asm!(concat!("DSB ", stringify!($A)) : : : "memory" : "volatile")
}
}
};
}
pub struct SY;
dmb_dsb!(SY);
impl sealed::Isb for SY {
#[inline(always)]
unsafe fn __isb(&self) {
asm!("ISB SY" : : : "memory" : "volatile")
}
}
#[inline(always)]
pub unsafe fn dmb<A>(arg: A)
where
A: sealed::Dmb,
{
arg.__dmb()
}
#[inline(always)]
pub unsafe fn dsb<A>(arg: A)
where
A: sealed::Dsb,
{
arg.__dsb()
}
#[inline(always)]
pub unsafe fn isb<A>(arg: A)
where
A: sealed::Isb,
{
arg.__isb()
}