Struct linera_witty::wasmtime::EntrypointInstance

pub struct EntrypointInstance<UserData> { /* private fields */ }

Necessary data for implementing an entrypoint Instance.

Implementations

impl<UserData> EntrypointInstance<UserData>

pub fn new(instance: Instance, store: Store<UserData>) -> Self

Creates a new EntrypointInstance with the guest module Instance and Store.

Trait Implementations

impl<UserData> AsContext for EntrypointInstance<UserData>

type Data = UserData

The host information associated with the Store, aka the T in Store<T>.

fn as_context(&self) -> StoreContext<'_, UserData>

Returns the store context that this type provides access to.

impl<UserData> AsContextMut for EntrypointInstance<UserData>

fn as_context_mut(&mut self) -> StoreContextMut<'_, UserData>

Returns the store context that this type provides access to.

impl<UserData> Instance for EntrypointInstance<UserData>

type Runtime = Wasmtime

The runtime this instance is running in.

type UserData = UserData

Custom user data stored in the instance.

type UserDataReference<'a> = &'a UserData where Self: 'a, UserData: 'a

A reference to the custom user data stored in the instance.

type UserDataMutReference<'a> = &'a mut UserData where Self: 'a, UserData: 'a

A mutable reference to the custom user data stored in the instance.

fn load_export(&mut self, name: &str) -> Option<Extern>

Loads an export from the guest module.

fn user_data(&self) -> Self::UserDataReference<'_>

Returns a reference to the custom user data stored in this instance.

fn user_data_mut(&mut self) -> Self::UserDataMutReference<'_>

Returns a mutable reference to the custom user data stored in this instance.

impl<Parameters, Results, UserData> InstanceWithFunction<Parameters, Results> for EntrypointInstance<UserData>

where Parameters: FlatLayout + WasmtimeParameters, Results: FlatLayout + WasmtimeResults,

type Function = TypedFunc<<Parameters as WasmtimeParameters>::Parameters, <Results as WasmtimeResults>::Results>

The runtime-specific type to represent the function.

fn function_from_export( &mut self, export: <Self::Runtime as Runtime>::Export, ) -> Result<Option<Self::Function>, RuntimeError>

Converts an export into a function, if it is one.

fn call( &mut self, function: &Self::Function, parameters: Parameters, ) -> Result<Results, RuntimeError>

Calls the function from this instance using the specified parameters.

fn load_function(&mut self, name: &str) -> Result<Self::Function, RuntimeError>

Loads a function from the guest Wasm instance.

impl<UserData> InstanceWithMemory for EntrypointInstance<UserData>

fn memory_from_export( &self, export: Extern, ) -> Result<Option<Memory>, RuntimeError>

Converts an export into the runtime’s specific memory type.

fn memory(&mut self) -> Result<Memory<'_, Self>, RuntimeError>

Returns the memory export from the current Wasm module instance.

impl<UserData> RuntimeMemory<EntrypointInstance<UserData>> for Memory

fn read<'instance>( &self, instance: &'instance EntrypointInstance<UserData>, location: GuestPointer, length: u32, ) -> Result<Cow<'instance, [u8]>, RuntimeError>

Reads length bytes from memory from the provided location.

fn write( &mut self, instance: &mut EntrypointInstance<UserData>, location: GuestPointer, bytes: &[u8], ) -> Result<(), RuntimeError>

Writes the bytes to memory at the provided location.