Struct nuts_container::memory::MemoryBackend

pub struct MemoryBackend { /* private fields */ }

The Backend implementation itself.

See the module documentation for details.

Implementations

impl MemoryBackend

pub fn new() -> MemoryBackend

Creates a new instance of the MemoryBackend type.

pub fn get(&self, id: &Id) -> Option<&[u8]>

Receives the content of the block with the given id.

Returns None if the block does not exist.

pub fn insert(&mut self) -> Result<Id, Error>

Inserts a new block.

The block contains only zeros.

Returns the id of the new block.

pub fn insert_data(&mut self, data: &[u8]) -> Result<Id, Error>

Inserts a new block with some initial data.

Assigns the first 512 bytes from data to the new block. If data does not have 512 bytes, the new block is padded with zero bytes.

Returns the id of the new block.

Trait Implementations

impl Backend for MemoryBackend

type CreateOptions = MemoryBackend

Options used to create a backend instance.

type OpenOptions = MemoryBackend

Options used to open a backend instance.

type Settings = ()

Runtime configuration used by the backend.

type Err = Error

The error type used by methods of this trait.

type Id = Id

The id identifies a block in the storage. It is used everywhere you need a pointer to a block.

type Info = ()

Information of the backend.

fn info(&self) -> Result<(), Error>

Returns information from the backend.

fn block_size(&self) -> u32

Returns the block size of the backend.

fn aquire(&mut self) -> Result<Id, Error>

Aquires a new block in the backend.

fn release(&mut self, id: Id) -> Result<(), Error>

Releases a block again.

fn read(&mut self, id: &Id, buf: &mut [u8]) -> Result<usize, Error>

Reads a block from the backend.

fn write(&mut self, id: &Id, buf: &[u8]) -> Result<usize, Error>

Writes a block into the backend.

impl Create<MemoryBackend> for MemoryBackend

fn settings(&self)

Returns the settings of this backend instance.

fn build(self) -> Result<MemoryBackend, Error>

Create an instance of the Backend.

impl Debug for MemoryBackend

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl HeaderGet<MemoryBackend> for MemoryBackend

fn get_header_bytes(&mut self, bytes: &mut [u8; 512]) -> Result<(), Error>

Receives the binary header data from the backend.

impl HeaderSet<MemoryBackend> for MemoryBackend

fn put_header_bytes(&mut self, bytes: &[u8; 512]) -> Result<(), Error>

Puts the given bytes into the header of the backend.

impl Open<MemoryBackend> for MemoryBackend

fn build(self, _settings: ()) -> Result<MemoryBackend, Error>

Create an instance of the Backend.

impl PartialEq for MemoryBackend

fn eq(&self, other: &MemoryBackend) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for MemoryBackend