97 lines
3.9 KiB
JavaScript
97 lines
3.9 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.QuickJSAsyncWASMModule = void 0;
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const errors_1 = require("./errors");
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const lifetime_1 = require("./lifetime");
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const module_1 = require("./module");
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const runtime_asyncify_1 = require("./runtime-asyncify");
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/**
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* Asyncified version of [[QuickJSWASMModule]].
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*
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* Due to limitations of Emscripten's ASYNCIFY process, only a single async
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* function call can happen at a time across the entire WebAssembly module.
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*
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* That means that all runtimes, contexts, functions, etc created inside this
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* WebAssembly are limited to a single concurrent async action.
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* **Multiple concurrent async actions is an error.**
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*
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* To allow for multiple concurrent async actions, you must create multiple WebAssembly
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* modules.
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*/
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class QuickJSAsyncWASMModule extends module_1.QuickJSWASMModule {
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/** @private */
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constructor(module, ffi) {
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super(module, ffi);
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this.ffi = ffi;
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this.module = module;
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}
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/**
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* Create a new async runtime inside this WebAssembly module. All runtimes inside a
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* module are limited to a single async call at a time. For multiple
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* concurrent async actions, create multiple WebAssembly modules.
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*/
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newRuntime(options = {}) {
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const rt = new lifetime_1.Lifetime(this.ffi.QTS_NewRuntime(), undefined, (rt_ptr) => {
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this.callbacks.deleteRuntime(rt_ptr);
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this.ffi.QTS_FreeRuntime(rt_ptr);
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});
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const runtime = new runtime_asyncify_1.QuickJSAsyncRuntime({
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module: this.module,
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ffi: this.ffi,
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rt,
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callbacks: this.callbacks,
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});
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(0, module_1.applyBaseRuntimeOptions)(runtime, options);
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if (options.moduleLoader) {
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runtime.setModuleLoader(options.moduleLoader);
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}
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return runtime;
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}
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/**
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* A simplified API to create a new [[QuickJSRuntime]] and a
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* [[QuickJSContext]] inside that runtime at the same time. The runtime will
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* be disposed when the context is disposed.
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*/
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newContext(options = {}) {
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const runtime = this.newRuntime();
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const lifetimes = options.ownedLifetimes ? options.ownedLifetimes.concat([runtime]) : [runtime];
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const context = runtime.newContext({ ...options, ownedLifetimes: lifetimes });
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runtime.context = context;
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return context;
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}
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/** Synchronous evalCode is not supported. */
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evalCode() {
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throw new errors_1.QuickJSNotImplemented("QuickJSWASMModuleAsyncify.evalCode: use evalCodeAsync instead");
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}
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/**
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* One-off evaluate code without needing to create a [[QuickJSRuntimeAsync]] or
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* [[QuickJSContextSync]] explicitly.
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*
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* This version allows for asynchronous Ecmascript module loading.
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*
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* Note that only a single async action can occur at a time inside the entire WebAssembly module.
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* **Multiple concurrent async actions is an error.**
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*
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* See the documentation for [[QuickJSWASMModule.evalCode]] for more details.
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*/
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evalCodeAsync(code, options) {
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// TODO: we should really figure out generator for the Promise monad...
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return lifetime_1.Scope.withScopeAsync(async (scope) => {
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const vm = scope.manage(this.newContext());
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(0, module_1.applyModuleEvalRuntimeOptions)(vm.runtime, options);
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const result = await vm.evalCodeAsync(code, "eval.js");
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if (options.memoryLimitBytes !== undefined) {
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// Remove memory limit so we can dump the result without exceeding it.
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vm.runtime.setMemoryLimit(-1);
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}
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if (result.error) {
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const error = vm.dump(scope.manage(result.error));
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throw error;
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}
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const value = vm.dump(scope.manage(result.value));
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return value;
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});
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}
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}
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exports.QuickJSAsyncWASMModule = QuickJSAsyncWASMModule;
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//# sourceMappingURL=module-asyncify.js.map
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