Trait InstanceWithFunction

pub trait InstanceWithFunction<Parameters, Results>: Instance
where
    Parameters: FlatLayout,
    Results: FlatLayout,
{
    type Function;

    // Required methods
    fn function_from_export(
        &mut self,
        export: <Self::Runtime as Runtime>::Export,
    ) -> Result<Option<Self::Function>, RuntimeError>;
    fn call(
        &mut self,
        function: &Self::Function,
        parameters: Parameters,
    ) -> Result<Results, RuntimeError>;

    // Provided method
    fn load_function(
        &mut self,
        name: &str,
    ) -> Result<Self::Function, RuntimeError> { ... }
}

How a runtime supports a function signature.

Required Associated Types

type Function

The runtime-specific type to represent the function.

Required Methods

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.

Provided Methods

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

Loads a function from the guest Wasm instance.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<Parameters, Results, I> InstanceWithFunction<Parameters, Results> for &mut I

where I: InstanceWithFunction<Parameters, Results>, Parameters: FlatLayout, Results: FlatLayout,

type Function = <I as InstanceWithFunction<Parameters, Results>>::Function

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

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

Implementors

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

where Parameters: FlatLayout + 'static, Results: FlatLayout + 'static,

type Function = ()