Method insert

vm-device/src/bus.rs:154–181

(&self, device: Arc<dyn BusDeviceSync>, base: u64, len: u64)

    /// The bus will only hold a weak reference to the object.
    #[allow(clippy::needless_pass_by_value)]
    pub fn insert(&self, device: Arc<dyn BusDeviceSync>, base: u64, len: u64) -> Result<()> {
        if len == 0 {
            return Err(Error::ZeroSizedRange);
        }

        // Reject all cases where the new device's range overlaps with an existing device.
        if self
            .devices
            .read()
            .unwrap()
            .iter()
            .any(|(range, _dev)| range.overlaps(base, len))
        {
            return Err(Error::Overlap);
        }

        if self
            .devices
            .write()
            .unwrap()
            .insert(BusRange { base, len }, Arc::downgrade(&device))
            .is_some()
        {
            return Err(Error::Overlap);
        }

        Ok(())
    }

    /// Removes the device at the given address space range.
    pub fn remove(&self, base: u64, len: u64) -> Result<()> {