Trait Memory 

pub trait Memory {
    // Required methods
    fn size(&self) -> u64;
    fn grow(&self, pages: u64) -> i64;
    fn read(&self, offset: u64, dst: &mut [u8]);
    fn write(&self, offset: u64, src: &[u8]);
}

Required Methods

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 new_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.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl Memory for RefCell<Vec<u8>>

fn size(&self) -> u64

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

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

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

impl<M: Memory> Memory for Rc<M>

fn size(&self) -> u64

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

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

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

Implementors

impl Memory for FileMemory

impl<M: Memory> Memory for RestrictedMemory<M>

impl<M: Memory> Memory for VirtualMemory<M>