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denoland-deno/ext/node/polyfills/02_init.js
Bartek Iwańczuk 93b9d114a4
refactor(ext/node): worker_threads.isMainThread setup (#22785)
This commit changes how we figure out if we're running on main
thread in `node:worker_threads` module. Instead of relying on quirky
"magic variable" for a name to check if we're on main thread, we are
now explicitly passing this information during bootstrapping of the
runtime. As a side effect, `WorkerOptions.name` is more useful
and matches what Node.js does more closely (though not fully).

Towards https://github.com/denoland/deno/issues/22783
2024-03-08 17:31:11 +01:00

59 lines
2 KiB
JavaScript

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// deno-lint-ignore-file
import { internals } from "ext:core/mod.js";
const requireImpl = internals.requireImpl;
import { nodeGlobals } from "ext:deno_node/00_globals.js";
import "node:module";
let initialized = false;
function initialize(
usesLocalNodeModulesDir,
argv0,
runningOnMainThread,
) {
if (initialized) {
throw Error("Node runtime already initialized");
}
initialized = true;
if (usesLocalNodeModulesDir) {
requireImpl.setUsesLocalNodeModulesDir();
}
const nativeModuleExports = requireImpl.nativeModuleExports;
nodeGlobals.Buffer = nativeModuleExports["buffer"].Buffer;
nodeGlobals.clearImmediate = nativeModuleExports["timers"].clearImmediate;
nodeGlobals.clearInterval = nativeModuleExports["timers"].clearInterval;
nodeGlobals.clearTimeout = nativeModuleExports["timers"].clearTimeout;
nodeGlobals.console = nativeModuleExports["console"];
nodeGlobals.global = globalThis;
nodeGlobals.process = nativeModuleExports["process"];
nodeGlobals.setImmediate = nativeModuleExports["timers"].setImmediate;
nodeGlobals.setInterval = nativeModuleExports["timers"].setInterval;
nodeGlobals.setTimeout = nativeModuleExports["timers"].setTimeout;
nodeGlobals.performance = nativeModuleExports["perf_hooks"].performance;
// FIXME(bartlomieju): not nice to depend on `Deno` namespace here
// but it's the only way to get `args` and `version` and this point.
internals.__bootstrapNodeProcess(argv0, Deno.args, Deno.version);
internals.__initWorkerThreads(runningOnMainThread);
internals.__setupChildProcessIpcChannel();
// `Deno[Deno.internal].requireImpl` will be unreachable after this line.
delete internals.requireImpl;
}
function loadCjsModule(moduleName, isMain, inspectBrk) {
if (inspectBrk) {
requireImpl.setInspectBrk();
}
requireImpl.Module._load(moduleName, null, { main: isMain });
}
globalThis.nodeBootstrap = initialize;
internals.node = {
initialize,
loadCjsModule,
};