Struct Segment 

pub struct Segment { /* private fields */ }

Immutable view into a region of a memory-mapped file.

Examples

use std::sync::Arc;
use mmap_io::{MemoryMappedFile, segment::Segment};

let mmap = Arc::new(MemoryMappedFile::open_ro("data.bin")?);

// Create a segment for bytes 100-200
let segment = Segment::new(mmap.clone(), 100, 100)?;

// Read the segment data
let data = segment.as_slice()?;

Implementations

impl Segment

pub fn new(parent: Arc<MemoryMappedFile>, offset: u64, len: u64) -> Result<Self>

Create a new immutable segment view. Performs bounds checks.

Errors

Returns MmapIoError::OutOfBounds if the segment exceeds file bounds.

pub fn as_slice(&self) -> Result<&[u8]>

Return the segment as a read-only byte slice.

Errors

Returns errors from the underlying MemoryMappedFile::as_slice call.

Note: Bounds are already validated at construction, so as_slice will not perform redundant validation.

pub fn len(&self) -> u64

Length of the segment.

pub fn is_empty(&self) -> bool

Check if the segment is empty.

pub fn offset(&self) -> u64

Offset of the segment in the file.

pub fn parent(&self) -> &MemoryMappedFile

Parent mapping.

Trait Implementations

impl Clone for Segment

fn clone(&self) -> Segment

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Segment

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

Formats the value using the given formatter.