Trait File 

pub trait File: Send + Sync {
    // Required methods
    fn lock_file(&self, exclusive: bool) -> Result<()>;
    fn unlock_file(&self) -> Result<()>;
    fn pread(&self, pos: usize, c: Arc<Completion>) -> Result<()>;
    fn pwrite(
        &self,
        pos: usize,
        buffer: Arc<RefCell<Buffer>>,
        c: Arc<Completion>,
    ) -> Result<()>;
    fn sync(&self, c: Arc<Completion>) -> Result<()>;
    fn size(&self) -> Result<u64>;
    fn truncate(&self, len: usize, c: Arc<Completion>) -> Result<()>;
}

Required Methods

fn lock_file(&self, exclusive: bool) -> Result<()>

fn unlock_file(&self) -> Result<()>

fn pread(&self, pos: usize, c: Arc<Completion>) -> Result<()>

fn pwrite( &self, pos: usize, buffer: Arc<RefCell<Buffer>>, c: Arc<Completion>, ) -> Result<()>

fn sync(&self, c: Arc<Completion>) -> Result<()>

fn size(&self) -> Result<u64>

fn truncate(&self, len: usize, c: Arc<Completion>) -> Result<()>

Truncate the file to len bytes. Used to reset the WAL to empty after a checkpoint in Truncate/Restart mode.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl File for VfsFileImpl

fn lock_file(&self, exclusive: bool) -> Result<()>

fn unlock_file(&self) -> Result<()>

fn pread(&self, pos: usize, c: Arc<Completion>) -> Result<()>

fn pwrite( &self, pos: usize, buffer: Arc<RefCell<Buffer>>, c: Arc<Completion>, ) -> Result<()>

fn sync(&self, c: Arc<Completion>) -> Result<()>

fn size(&self) -> Result<u64>

fn truncate(&self, _len: usize, c: Arc<Completion>) -> Result<()>

Implementors