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Started separating WASM into its own npm package
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| import workerInitialize from './worker'; | ||
| import { PppApi } from './types'; | ||
|
|
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| declare const process: any; | ||
| declare const require: any; | ||
|
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| // Make sure only one web worker instance is created | ||
| // regardless of how many times package initialization is requested | ||
| type InitCallback = (v3d: PppApi) => void; | ||
| let workerInitializing = false; | ||
| let resolvedApi: PppApi; | ||
| let pendingInitRequests: InitCallback[] = []; | ||
|
|
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| export default function (...args): Promise<PppApi> { | ||
| const debugLog = args[0] || true; | ||
| const profileLog = args[1] || false; | ||
| function debug(...args) { | ||
| if (debugLog) { | ||
| console.log('main:', ...args); | ||
| } | ||
| } | ||
|
|
||
| function initWebWorker() { | ||
| workerInitializing = true; | ||
| const isBrowser = !(typeof process === 'object' && typeof require === 'function'); | ||
| const startTime = new Date().valueOf(); | ||
| debug('starting new web worker...'); | ||
|
|
||
| const prefixOverride = isBrowser | ||
| ? window.location.href.replace(/(.+\w\/)(.+)/, '/$2') | ||
| : __dirname + '/'; | ||
| let worker: any; | ||
| const workerCode = `(${workerInitialize.toString().trim()})(${debugLog},"${prefixOverride}");`; | ||
| if (isBrowser) { | ||
| const objectUrl = URL.createObjectURL(new Blob([workerCode], { type: 'text/javascript' })); | ||
| worker = new window.Worker(objectUrl); | ||
| URL.revokeObjectURL(objectUrl); | ||
| } else { | ||
| console.log(`${__dirname}`); | ||
| const { Worker } = require('node:worker_threads'); | ||
| worker = new Worker(workerCode, { eval: true }); | ||
| } | ||
|
|
||
| let callId = 0; | ||
| const pendingPromises = new Map(); | ||
| let asyncApi: PppApi | object; | ||
|
|
||
| function makeAsyncFunction(methodName: string) { | ||
| return async function (...args: any) { | ||
| if (typeof this === 'object' && this.hasOwnProperty('__handle')) { | ||
| args.unshift(this.__handle); | ||
| } | ||
| return new Promise((accept, reject) => { | ||
| const currentId = callId++; | ||
| debug(`calling ${methodName}:${currentId}`); | ||
| pendingPromises.set(currentId, [accept, reject, methodName, new Date()]); | ||
| worker.postMessage({ | ||
| method: methodName, | ||
| args: args.map((a) => | ||
| typeof a === 'object' && a.hasOwnProperty('__handle') ? a.__handle : a | ||
| ), | ||
| callId: currentId, | ||
| }); | ||
| }); | ||
| }; | ||
| } | ||
|
|
||
| function makeAsyncApi(api: object) { | ||
| asyncApi = { | ||
| terminate: () => worker.terminate(), | ||
| }; | ||
| for (let name in api) { | ||
| if (typeof api[name] == 'object') { | ||
| const className = name; | ||
| asyncApi[className] = { | ||
| create: makeAsyncFunction(`${className}$create`), | ||
| delete: makeAsyncFunction(`${className}$delete`), | ||
| }; | ||
| for (let methodName in api[className]) { | ||
| asyncApi[className][methodName] = makeAsyncFunction(`${className}$${methodName}`); | ||
| } | ||
| } else { | ||
| asyncApi[name] = makeAsyncFunction(name); | ||
| } | ||
| } | ||
| return asyncApi; | ||
| } | ||
|
|
||
| function workerOnMessage(e) { | ||
| if (!e.data) { | ||
| return; | ||
| } | ||
| if (e.data.initialized && e.data.api) { | ||
| debug('worker has been initialized and ready'); | ||
| makeAsyncApi(e.data.api); | ||
| debug(`worker initialized after ${new Date().valueOf() - startTime}ms`); | ||
| resolvedApi = asyncApi as PppApi; | ||
| for (let resolve of pendingInitRequests) { | ||
| resolve(resolvedApi); | ||
| } | ||
| pendingInitRequests = []; | ||
| } else { | ||
| const result = e.data.result; | ||
| if ( | ||
| typeof result === 'object' && | ||
| result.hasOwnProperty('__type') && | ||
| asyncApi.hasOwnProperty(result.__type) | ||
| ) { | ||
| result.__proto__ = asyncApi[result.__type]; | ||
| } | ||
| const callId = e.data.callId; | ||
| const [acceptCb, rejectCb, methodName, startTime] = pendingPromises.get(callId); | ||
| if (profileLog) { | ||
| const elapsedMs = new Date().valueOf() - startTime; | ||
| console.log(`main: '${methodName}:${callId}' took ${elapsedMs}ms`); | ||
| } | ||
| if (e.data.success) { | ||
| acceptCb(e.data.result); | ||
| } else { | ||
| rejectCb(e.data.result); | ||
| } | ||
| pendingPromises.delete(e.data.callId); | ||
| } | ||
| } | ||
|
|
||
| if (isBrowser) { | ||
| worker.onmessage = workerOnMessage; | ||
| } else { | ||
| worker.on('message', workerOnMessage); | ||
| } | ||
| } | ||
| return new Promise((resolve) => { | ||
| if (resolvedApi) { | ||
| resolve(resolvedApi); | ||
| } else { | ||
| pendingInitRequests.push(resolve); | ||
| if (!workerInitializing) { | ||
| initWebWorker(); | ||
| } | ||
| } | ||
| }); | ||
| } | ||
| export * from './types'; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| export interface PppEngine { | ||
|
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| }; | ||
|
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| export interface PppApi { | ||
|
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| getBuildTime(): Promise<string>; | ||
|
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| terminate(); | ||
| } |
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