Function try_decode_error

src/backend/linux_raw/io/errno.rs:240–251

(raw: RetReg<Num>)

#[cfg(any(feature = "event", feature = "runtime", feature = "system"))]
#[inline]
pub(in crate::backend) unsafe fn try_decode_error<Num: RetNumber>(raw: RetReg<Num>) -> io::Errno {
    debug_assert!(raw.is_in_range(-4095..0));

    // Tell the optimizer that we know the value is in the error range.
    // This helps it avoid unnecessary integer conversions.
    #[cfg(core_intrinsics)]
    {
        core::intrinsics::assume(raw.is_in_range(-4095..0));
    }

    Errno(raw.decode_error_code())
}

/// Return the contained `usize` value.
#[cfg(not(debug_assertions))]