Trait ImportedFunctionInterface

pub trait ImportedFunctionInterface {
    type HostParameters: WitStore;
    type HostResults: WitLoad;
    type GuestParameters: FlatLayout;
    type GuestResults: FlatLayout;

    // Required methods
    fn lower_parameters<Instance>(
        parameters: Self::HostParameters,
        memory: &mut Memory<'_, Instance>,
    ) -> Result<Self::GuestParameters, RuntimeError>
       where Instance: InstanceWithMemory,
             <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>;
    fn lift_results<Instance>(
        results: Self::GuestResults,
        memory: &Memory<'_, Instance>,
    ) -> Result<Self::HostResults, RuntimeError>
       where Instance: InstanceWithMemory,
             <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>;
}

Representation of an imported function’s interface.

Implemented for a tuple pair of the host parameters type and the host results type, and then allows converting to the guest function’s signature.

Required Associated Types

type HostParameters: WitStore

The type representing the host-side parameters.

type HostResults: WitLoad

The type representing the host-side results.

type GuestParameters: FlatLayout

The flat layout representing the guest-side parameters.

type GuestResults: FlatLayout

The flat layout representing the guest-side results.

Required Methods

fn lower_parameters<Instance>( parameters: Self::HostParameters, memory: &mut Memory<'_, Instance>, ) -> Result<Self::GuestParameters, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Converts the host-side parameters into the guest-side parameters.

fn lift_results<Instance>( results: Self::GuestResults, memory: &Memory<'_, Instance>, ) -> Result<Self::HostResults, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Converts the guest-side results into the host-side results.

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> ImportedFunctionInterface for (Parameters, Results)

where Parameters: WitStore, Results: WitLoad, <Parameters::Layout as Layout>::Flat: FlatHostParameters, <Results::Layout as Layout>::Flat: FlatHostResults,

type HostParameters = Parameters

type HostResults = Results

type GuestParameters = <<<Parameters as WitType>::Layout as Layout>::Flat as FlatHostParameters>::GuestParameters

type GuestResults = <<<Results as WitType>::Layout as Layout>::Flat as FlatHostResults>::GuestResults

fn lower_parameters<Instance>( parameters: Self::HostParameters, memory: &mut Memory<'_, Instance>, ) -> Result<Self::GuestParameters, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

fn lift_results<Instance>( results: Self::GuestResults, memory: &Memory<'_, Instance>, ) -> Result<Self::HostResults, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Implementors