Struct FileMemory

pub struct FileMemory(/* private fields */);

A Memory backed by a file.

Implementations

impl FileMemory

pub fn new(file: File) -> Self

Trait Implementations

impl Clone for FileMemory

fn clone(&self) -> FileMemory

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Memory for FileMemory

fn size(&self) -> u64

Returns the current size of the stable memory in WebAssembly pages. (One WebAssembly page is 64Ki bytes.)

fn grow(&self, pages: u64) -> i64

Tries to grow the memory by pages many pages containing zeroes. If successful, returns the previous size of the memory (in pages). Otherwise, returns -1.

fn read(&self, offset: u64, dst: &mut [u8])

Copies the data referred to by offset out of the stable memory and replaces the corresponding bytes in dst.

fn write(&self, offset: u64, src: &[u8])

Copies the data referred to by src and replaces the corresponding segment starting at offset in the stable memory.

unsafe fn read_unsafe(&self, offset: u64, dst: *mut u8, count: usize)

Copies count number of bytes of the data starting from offset out of the stable memory into the buffer starting at dst.