Struct RingFile

pub struct RingFile { /* private fields */ }

Implementations

impl RingFile

pub fn new<P: Into<PathBuf>>(buf_size: i32, file_path: P) -> Self

Allocate a whole buffer specified by buf_size, size can not exceed 2GB.

pub fn dump(&self) -> Result<()>

Will create a truncated file and write all data from mem to disk.

Trait Implementations

impl Write for RingFile

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

Write will abort when reaching the boundary of buffer, rewind the offset to 0 and return the bytes written. You can use Write::write_all() provided by the trait to cover the rewinding logic.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.