Crate spin_core

Spin core execution engine

This crate provides low-level Wasm and WASI functionality required by Spin. Most of this functionality consists of wrappers around wasmtime and [wasi_common] that narrows the flexibility of wasmtime to the set of features used by Spin (such as only supporting wasmtime’s async calling style).

Re-exports

• pub use wasmtime;

Structs

• AnyHostComponentDataHandle
  An opaque handle which can be passed to HostComponentsData to access host component data.
• Component
  A compiled WebAssembly Component.
• Config
  Global configuration for EngineBuilder.
• Data
  Host state data associated with individual Stores and Instances.
• Engine
  An Engine is a global context for the initialization and execution of Spin components.
• EngineBuilder
  A builder interface for configuring a new Engine.
• HostComponentDataHandle
  An opaque handle returned by crate::EngineBuilder::add_host_component which can be passed to HostComponentsData to access or set associated HostComponent::Data.
• HostComponentsData
  Holds a heterogenous set of HostComponent::Datas.
• I32Exit
  An error returned from the proc_exit host syscall.
• Instance
  An instantiated component.
• InstancePre
  A pre-initialized instance that is ready to be instantiated.
• Module
  A compiled WebAssembly module, ready to be instantiated.
• ModuleInstance
  An instantiated WebAssembly module.
• ModuleInstancePre
  A pre-initialized module instance that is ready to be instantiated.
• OutputBuffer
  An in-memory stdio output buffer.
• Store
  A Store holds the runtime state of a Spin instance.
• StoreBuilder
  A builder interface for configuring a new Store.

Enums

• Trap
• Wasi
  Wrapper for the Preview 1 and Preview 2 versions of WasiCtx.
• WasiVersion
  The version of Wasi being used

Constants

• DEFAULT_EPOCH_TICK_INTERVAL
  The default EngineBuilder::epoch_tick_interval.

Traits

• HostComponent
  A trait for Spin “host components”.
• OutboundWasiHttpHandler
  Handler for wasi-http based requests

Type Aliases

• Linker
  An alias for wasmtime::component::Linker specialized to Data.
• ModuleLinker
  An alias for wasmtime::Linker specialized to Data.

Attribute Macros

• async_trait