Struct TargetDir 

pub struct TargetDir { /* private fields */ }

The parent directory of a promotion target, held open, plus the final file name. All reads and writes for the target go through this pair.

Implementations

impl TargetDir

pub fn read_optional(&self) -> Result<Option<Vec<u8>>>

Read the target through the descriptor; None when absent.

pub fn write(&self, bytes: &[u8]) -> Result<()>

Write the target atomically: staged sibling created O_EXCL through the descriptor, fsynced, renamed over the target, directory fsynced.

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

Remove the target through the descriptor; absent targets are fine.

pub fn apply(&self, bytes: Option<&[u8]>) -> Result<()>

Apply a recorded state: bytes present means write, absent means remove.

Trait Implementations

impl Debug for TargetDir

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

Formats the value using the given formatter.