root
60 lines
1.5 KiB
JavaScript
60 lines
1.5 KiB
JavaScript
import {
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instantiateNapiModuleSync,
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MessageHandler,
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WASI,
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createFsProxy,
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emnapiAsyncWorkPlugin,
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emnapiTSFNPlugin,
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} from '@napi-rs/wasm-runtime'
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import { memfsExported as __memfsExported } from '@napi-rs/wasm-runtime/fs'
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const fs = createFsProxy(__memfsExported)
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const errorOutputs = []
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const handler = new MessageHandler({
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onLoad({ wasmModule, wasmMemory }) {
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const wasi = new WASI({
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fs,
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preopens: {
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'/': '/',
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},
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print: function () {
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// eslint-disable-next-line no-console
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console.log.apply(console, arguments)
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},
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printErr: function() {
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// eslint-disable-next-line no-console
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console.error.apply(console, arguments)
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errorOutputs.push([...arguments])
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},
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})
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return instantiateNapiModuleSync(wasmModule, {
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childThread: true,
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wasi,
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// The wasm links a "basic" emnapi archive (no C async-work /
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// threadsafe-function implementations), so every thread that
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// instantiates it must provide the JavaScript implementations
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// through the emnapi plugins.
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plugins: [emnapiAsyncWorkPlugin, emnapiTSFNPlugin],
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overwriteImports(importObject) {
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importObject.env = {
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...importObject.env,
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...importObject.napi,
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...importObject.emnapi,
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memory: wasmMemory,
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}
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},
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})
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},
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onError(error) {
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postMessage({ type: 'error', error, errorOutputs })
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errorOutputs.length = 0
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}
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})
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globalThis.onmessage = function (e) {
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handler.handle(e)
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}
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