Struct DevDirectoryObject 

pub struct DevDirectoryObject {
    node: Arc<DevNode>,
    position: RwLock<usize>,
}

A file object for directories in DevFS

This struct provides a FileObject implementation for directories that allows reading directory entries as binary DirectoryEntry data.

Fields

node: Arc<DevNode>

Reference to the DevNode

position: RwLock<usize>

Current position in directory entries (entry index)

Implementations

impl DevDirectoryObject

pub fn new(node: Arc<DevNode>) -> Self

Create a new directory file object

Trait Implementations

impl ControlOps for DevDirectoryObject

fn control(&self, _command: u32, _arg: usize) -> Result<i32, &'static str>

Perform a control operation

fn supported_control_commands(&self) -> Vec<(u32, &'static str)>

Get a list of supported control commands

impl FileObject for DevDirectoryObject

fn seek(&self, whence: SeekFrom) -> Result<u64, StreamError>

Seek to a position in the file stream

fn metadata(&self) -> Result<FileMetadata, StreamError>

Get metadata about the file

fn truncate(&self, _size: u64) -> Result<(), StreamError>

Truncate the file to the specified size

fn as_any(&self) -> &dyn Any

fn read_at(&self, offset: u64, buffer: &mut [u8]) -> Result<usize, StreamError>

Read data from a specific offset without changing internal position

fn write_at(&self, offset: u64, buffer: &[u8]) -> Result<usize, StreamError>

Write data to a specific offset without changing internal position

fn sync(&self) -> Result<(), StreamError>

Synchronize file content to storage

impl MemoryMappingOps for DevDirectoryObject

fn get_mapping_info( &self, _offset: usize, _length: usize, ) -> Result<(usize, usize, bool), &'static str>

Get mapping information for a region of the object

fn on_mapped( &self, _vaddr: usize, _paddr: usize, _length: usize, _offset: usize, )

Notification that a mapping has been created

fn on_unmapped(&self, _vaddr: usize, _length: usize)

Notification that a mapping has been removed

fn supports_mmap(&self) -> bool

Check if memory mapping is supported

fn get_mapping_info_with( &self, offset: usize, length: usize, _is_shared: bool, ) -> Result<(usize, usize, bool), &'static str>

Get mapping information with sharing intent.

fn mmap_owner_name(&self) -> String

Diagnostic helper: return a short owner name for logging

fn resolve_fault( &self, access: &AccessKind, map: &VirtualMemoryMap, ) -> Result<ResolveFaultResult, ResolveFaultError>

impl Selectable for DevDirectoryObject

fn current_ready(&self, interest: ReadyInterest) -> ReadySet

Return current readiness for the given interest set.

fn wait_until_ready( &self, _interest: ReadyInterest, _trapframe: &mut Trapframe, _timeout_ticks: Option<u64>, ) -> SelectWaitOutcome

Block the current task using the provided trapframe until the interest becomes ready or the optional timeout (in ticks) expires.

fn is_nonblocking(&self) -> bool

Query whether non-blocking I/O semantics are enabled on this object.

fn set_nonblocking(&self, _enabled: bool)

Enable or disable non-blocking I/O semantics on this object.

impl StreamOps for DevDirectoryObject

fn read(&self, buffer: &mut [u8]) -> Result<usize, StreamError>

Read data from the stream

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

Write data to the stream