Struct MmapBackend 

pub struct MmapBackend { /* private fields */ }

Memory-mapped I/O backend for zero-copy operations.

Implementations

impl MmapBackend

pub fn new(path: &Path, read_only: bool) -> Result<MmapBackend, Error>

Creates a new memory-mapped backend.

Errors

Returns an error if the file cannot be mapped.

pub const fn capacity(&self) -> u64

Returns the capacity in sectors (512 bytes each).

pub fn read(&self, offset: usize, buf: &mut [u8]) -> Result<usize, Error>

Reads data at the given offset.

pub fn write(&self, offset: usize, buf: &[u8]) -> Result<usize, Error>

Writes data at the given offset.

pub fn sync(&self) -> Result<(), Error>

Syncs the mapping to disk.

pub const unsafe fn as_ptr(&self) -> *const u8

Returns a pointer to the mapped memory.

Safety

The caller must ensure the pointer is used within the valid range.

pub const unsafe fn as_mut_ptr(&self) -> *mut u8

Returns a mutable pointer to the mapped memory.

Safety

The caller must ensure the pointer is used within the valid range and the backend is not read-only.

Trait Implementations

impl Drop for MmapBackend

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Send for MmapBackend

impl Sync for MmapBackend