Struct AtomicFile 

pub struct AtomicFile { /* private fields */ }

Based on BasicAtomicFile which makes sure that updates are all-or-nothing. Performs commit asyncronously.

#Example

use atom_file::{AtomicFile,DummyFile,MemFile,Storage};
let mut af = AtomicFile::new(MemFile::new(), DummyFile::new());
af.write( 0, &[1,2,3,4] );
af.commit(4);
af.wait_complete();

Implementations

impl AtomicFile

pub fn new(stg: Box<dyn Storage>, upd: Box<dyn Storage>) -> Box<Self>

Construct AtomicFile with default limits. stg is the main underlying storage, upd is temporary storage for updates during commit.

pub fn new_with_limits( stg: Box<dyn Storage>, upd: Box<dyn Storage>, lim: &Limits, ) -> Box<Self>

Construct Atomic file with specified limits.

Trait Implementations

impl Storage for AtomicFile

fn commit(&mut self, size: u64)

Finish write transaction, size is new size of underlying storage.

fn size(&self) -> u64

Get the size of the underlying storage. Note : this is valid initially and after a commit but is not defined after write is called.

fn read(&self, start: u64, data: &mut [u8])

Read data.

fn write_data(&mut self, start: u64, data: Data, off: usize, len: usize)

Write Data slice.

fn write(&mut self, start: u64, data: &[u8])

Write byte slice to storage.

fn wait_complete(&self)

Wait until current writes are complete.

fn write_vec(&mut self, start: u64, data: Vec<u8>)

Write byte Vec.

fn write_u64(&mut self, start: u64, value: u64)

Write u64.

fn read_u64(&self, start: u64) -> u64

Read u64.

fn clone(&self) -> Box<dyn Storage>

Clone. note: provided method panics.