Trait Memory 

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

Memory

Page-addressed backing for Storage. Growth returns the previous page count, or -1 without changing memory. Successful growth adds zero-filled pages. Reads and writes must reject the complete out-of-bounds range before IO. Implementing this trait alone does not grant allocation authority.

Required Methods

fn size(&self) -> u64

Current extent in 65,536-byte pages.

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

Add zero-filled pages, or return -1 on refusal.

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

Read an admitted byte range.

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

Write an admitted byte range. Native writes need not be transactional.

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, bytes: &mut [u8])

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

impl<M: Memory + ?Sized> Memory for &M

fn size(&self) -> u64

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

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

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

impl<M: Memory + ?Sized> Memory for Rc<M>

fn size(&self) -> u64

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

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

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

Implementors

impl<M: Memory> Memory for RuntimeMemory<M>