Struct Ctx 

pub struct Ctx<'a, T> { /* private fields */ }

Context wrapper providing ergonomic access to store data and memory.

Used by typed host functions to access state and perform memory operations.

Implementations

impl<'a, T> Ctx<'a, T>

pub fn new(caller: Caller<'a, T>) -> Ctx<'a, T>

Create a new context from a wasmi Caller

pub fn data(&self) -> &T

Get a reference to the store data

pub fn data_mut(&mut self) -> &mut T

Get a mutable reference to the store data

pub fn caller(&self) -> &Caller<'a, T>

Get the underlying wasmi Caller for advanced operations

pub fn caller_mut(&mut self) -> &mut Caller<'a, T>

Get the underlying wasmi Caller mutably

pub fn read_value(&mut self, ptr: i32, len: i32) -> Result<Value, LinkerError>

Read a Value from WASM memory using the Graph ABI

pub fn write_value_at( &mut self, out_ptr: i32, out_cap: i32, value: &Value, ) -> Result<i32, LinkerError>

Write a Value to WASM memory at the specified location. Returns the number of bytes written.

The caller provides the output buffer location and capacity. Returns an error if the encoded data exceeds the capacity.

pub fn write_value(&mut self, value: &Value) -> Result<(i32, i32), LinkerError>

Write a Value to WASM memory using the Graph ABI (legacy method). Returns (ptr, len) of the written data.

Deprecated: Prefer write_value_at() with explicit buffer location. Uses a fixed offset (16KB) for backward compatibility.

pub fn read_string(&mut self, ptr: i32, len: i32) -> Result<String, LinkerError>

Read a string from WASM memory