Struct ModuleCache 

pub struct ModuleCache { /* private fields */ }

Load-bearing invariant this cache does not check: every compile call through one ModuleCache must pass the same wasmtime::Engine every time. A Module is only valid for the Engine that compiled it — mixing engines through one cache would silently return a Module compiled for the wrong Engine. This codebase constructs exactly one Engine per process (cuttlefishd’s and cuttlefish build’s main), so a ModuleCache constructed once alongside it, and never shared across processes, upholds this automatically. A test that constructs its own throwaway Engine should also construct its own throwaway ModuleCache — never reuse one across two different Engines.

Implementations

impl ModuleCache

pub fn new() -> Self

A fresh, empty cache.

pub fn compile( &self, engine: &Engine, module_bytes: &[u8], ) -> Result<Arc<Module>>

Compile module_bytes against engine, reusing a cached compilation if these exact bytes were compiled before through this same cache.

Trait Implementations

impl Default for ModuleCache

fn default() -> Self

Returns the “default value” for a type.