Trait RawDeviceIdIndex

pub unsafe trait RawDeviceIdIndex: RawDeviceId {
    const DRIVER_DATA_OFFSET: usize;

    // Required method
    fn index(&self) -> usize;
}

Extension trait for RawDeviceId for devices that embed an index or context value.

This is typically used when the device ID struct includes a field like driver_data that is used to store a pointer-sized value (e.g., an index or context pointer).

Safety

Implementers must ensure that DRIVER_DATA_OFFSET is the correct offset (in bytes) to the context/data field (e.g., the driver_data field) within the raw device ID structure. This field must be correctly sized to hold a usize.

Ideally, the data should be added during Self to RawType conversion, but there’s currently no way to do it when using traits in const.

Required Associated Constants

const DRIVER_DATA_OFFSET: usize

The offset (in bytes) to the context/data field in the raw device ID.

Required Methods

fn index(&self) -> usize

The index stored at DRIVER_DATA_OFFSET of the implementor of the RawDeviceIdIndex trait.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl RawDeviceIdIndex for kernel::acpi::DeviceId

const DRIVER_DATA_OFFSET: usize = 16usize

impl RawDeviceIdIndex for kernel::auxiliary::DeviceId

const DRIVER_DATA_OFFSET: usize = 32usize

impl RawDeviceIdIndex for kernel::of::DeviceId

const DRIVER_DATA_OFFSET: usize = 192usize

impl RawDeviceIdIndex for kernel::pci::DeviceId

const DRIVER_DATA_OFFSET: usize = 24usize