Struct WasmMemory 

pub struct WasmMemory { /* private fields */ }

WASM memory abstraction

Implementations

impl WasmMemory

pub fn new(initial_pages: u32, max_pages: Option<u32>) -> Self

pub fn size(&self) -> u32

Get current size in bytes

pub fn pages(&self) -> u32

Get current size in pages

pub fn grow(&mut self, delta: u32) -> WasmResult<u32>

Grow memory by delta pages

pub fn read(&self, ptr: GuestPtr, len: u32) -> WasmResult<&[u8]>

Read bytes from memory

pub fn read_mut(&mut self, ptr: GuestPtr, len: u32) -> WasmResult<&mut [u8]>

Read bytes as mutable

pub fn write(&mut self, ptr: GuestPtr, data: &[u8]) -> WasmResult<()>

Write bytes to memory

pub fn read_string(&self, ptr: GuestPtr, len: u32) -> WasmResult<String>

Read a string from memory (null-terminated or with length)

pub fn write_string(&mut self, ptr: GuestPtr, s: &str) -> WasmResult<()>

Write a string to memory

pub fn read_value<T: Copy>(&self, ptr: GuestPtr) -> WasmResult<T>

Read a value of type T

pub fn write_value<T: Copy>( &mut self, ptr: GuestPtr, value: T, ) -> WasmResult<()>

Write a value of type T

pub fn alloc(&mut self, size: u32) -> WasmResult<GuestPtr>

Allocate memory from the heap

pub fn free(&mut self, ptr: GuestPtr) -> WasmResult<()>

Free allocated memory (basic implementation - doesn’t reuse space)

pub fn alloc_bytes(&mut self, data: &[u8]) -> WasmResult<GuestSlice>

Allocate and write data

pub fn alloc_string(&mut self, s: &str) -> WasmResult<GuestSlice>

Allocate and write string

Trait Implementations

impl Default for WasmMemory

fn default() -> Self

Returns the “default value” for a type.