Struct SyncStorageIo 

pub struct SyncStorageIo { /* private fields */ }

Synchronous storage I/O backend.

Executes I/O inline in submit_* calls. Completions are staged in an internal ring buffer and returned on the next poll_completions call.

Zero heap allocation on the hot path — the completion buffer and fd table are pre-allocated at construction.

Implementations

impl SyncStorageIo

pub fn new() -> Self

Create a new synchronous backend.

Trait Implementations

impl Debug for SyncStorageIo

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

Formats the value using the given formatter.

impl Default for SyncStorageIo

fn default() -> Self

Returns the “default value” for a type.

impl StorageIo for SyncStorageIo

fn register_fd(&mut self, file: File) -> Result<IoFd, StorageIoError>

Register an already-opened file with this backend.

fn deregister_fd(&mut self, fd: IoFd) -> Result<(), StorageIoError>

Deregister and close a previously registered file.

fn submit_write( &mut self, fd: IoFd, data: &[u8], offset: u64, ) -> Result<u64, StorageIoError>

Submit a write at the given file offset. Non-blocking.

fn submit_append( &mut self, fd: IoFd, data: &[u8], ) -> Result<u64, StorageIoError>

Submit an append (write at current end-of-file). Non-blocking.

fn submit_datasync(&mut self, fd: IoFd) -> Result<u64, StorageIoError>

Submit an fdatasync (data-only sync, no metadata). Non-blocking.

fn flush(&mut self) -> Result<usize, StorageIoError>

Flush pending submissions to the kernel.

fn poll_completions(&mut self, out: &mut Vec<IoCompletion>)

Poll for completed operations. Non-blocking.

fn pending_count(&self) -> usize

Returns the number of operations submitted but not yet completed.