Crate sp_wasm_interface

Types and traits for interfacing between the host and the wasm runtime.

Re-exports

• pub use wasmtime;
• pub use anyhow;

Macros

• if_wasmtime_is_enabled

Structs

• ExtendedHostFunctions
  A wrapper which merges two sets of host functions, and allows the second set to override the host functions from the first set.
• Pointer
  Type to represent a pointer in wasm at the host.
• Signature
  The Signature of a function

Enums

• ReturnValue
  Typed value that can be returned from a function.
• Value
  Values supported by Substrate on the boundary between host/Wasm.
• ValueType
  Value types supported by Substrate on the boundary between host/Wasm.

Traits

• Function
  Something that provides a function implementation on the host for a wasm function.
• FunctionContext
  Context used by Function to interact with the allocator and the memory of the wasm instance.
• HostFunctionRegistry
  A trait used to statically register host callbacks with the WASM executor, so that they call be called from within the runtime with minimal overhead.
• HostFunctions
  Something that provides implementations for host functions.
• IntoValue
  Something that can be converted into a wasm compatible Value.
• MaybeRefUnwindSafe
  A trait that requires RefUnwindSafe when feature = std.
• PointerType
  Something that can be wrapped in a wasm Pointer.
• TryFromValue
  Something that can may be created from a wasm Value.
• WasmTy
  A trait for types directly usable at the WASM FFI boundary without any conversion at all.

Type Definitions

• Result
  Result type used by traits in this crate.
• WordSize
  The word size used in wasm. Normally known as usize in Rust.