Struct WriteBuffer 

pub struct WriteBuffer { /* private fields */ }

Manages in-progress file writes, mapping file handles to their buffers.

Implementations

impl WriteBuffer

pub fn new(spool_dir: PathBuf) -> Self

spool_dir is where every buffer’s backing file lives; resolve it with crate::spool::spool_dir_from_env and prepare it before calling this.

pub fn open( &mut self, fh: u64, inode: u64, original_size: u64, ) -> Result<&mut FileBuffer>

Register a new write buffer for the given file handle.

pub fn write( &mut self, fh: u64, offset: i64, data: &[u8], ) -> Result<u32, MountError>

Write data at offset into the buffer for fh.

pub fn read( &mut self, fh: u64, offset: i64, size: u32, ) -> Result<Vec<u8>, MountError>

Read data from the buffer for fh.

pub fn flush(&mut self, fh: u64) -> Option<FileBuffer>

Remove and return the buffer for flushing to MTP.

pub fn close(&mut self, fh: u64) -> Option<FileBuffer>

Alias for flush – used at file close time.

pub fn is_open(&self, fh: u64) -> bool

pub fn size(&self, fh: u64) -> Option<u64>

Current buffered size for the given file handle.