Struct ChunkReader 

pub struct ChunkReader { /* private fields */ }

A file opened for concurrent positional reads.

Cloning is cheap and shares one descriptor; pread carries its own offset, so concurrent readers never contend on a file position.

Implementations

impl ChunkReader

pub fn open(path: &Path) -> Result<Self>

pub fn len(&self) -> u64

pub fn is_empty(&self) -> bool

pub fn read_at(&self, offset: u64, buf: &mut [u8]) -> Result<usize>

Fill buf from offset, returning the number of bytes read.

A short read is only accepted at end of file; anywhere else it means the file changed underneath us, which is an error rather than silent truncation of the transfer.

Trait Implementations

impl Clone for ChunkReader

fn clone(&self) -> ChunkReader

Returns a duplicate of the value.

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

Performs copy-assignment from source.