Struct foyer::DirectFileDevice

pub struct DirectFileDevice { /* private fields */ }

A device that uses a single direct i/o file.

Implementations

impl DirectFileDevice

pub async fn pwrite(&self, buf: IoBytes, offset: u64) -> Result<(), Error>

Positioned write API for the direct file device.

pub async fn pread(&self, offset: u64, len: usize) -> Result<IoBytesMut, Error>

Positioned read API for the direct file device.

Trait Implementations

impl Clone for DirectFileDevice

fn clone(&self) -> DirectFileDevice

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DirectFileDevice

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

Formats the value using the given formatter.

impl Dev for DirectFileDevice

type Options = DirectFileDeviceOptions

Options for the device.

fn capacity(&self) -> usize

The capacity of the device, must be 4K aligned.

fn region_size(&self) -> usize

The region size of the device, must be 4K aligned.

async fn open( options: <DirectFileDevice as Dev>::Options, runtime: Runtime, ) -> Result<DirectFileDevice, Error>

Open the device with the given options.

async fn write( &self, buf: IoBytes, region: u32, offset: u64, ) -> Result<(), Error>

Write API for the device.

async fn read( &self, region: u32, offset: u64, len: usize, ) -> Result<IoBytesMut, Error>

Read API for the device.

async fn flush(&self, _: Option<u32>) -> Result<(), Error>

Flush the device, make sure all modifications are persisted safely on the device.