659e79fc08
* refactor: prevent consistent early exception * Use _linkedBinding where possible * Remove dead electronBinding
66 lines
2.2 KiB
TypeScript
66 lines
2.2 KiB
TypeScript
import * as util from 'util';
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const timers = require('timers');
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type AnyFn = (...args: any[]) => any
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// setImmediate and process.nextTick makes use of uv_check and uv_prepare to
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// run the callbacks, however since we only run uv loop on requests, the
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// callbacks wouldn't be called until something else activated the uv loop,
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// which would delay the callbacks for arbitrary long time. So we should
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// initiatively activate the uv loop once setImmediate and process.nextTick is
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// called.
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const wrapWithActivateUvLoop = function <T extends AnyFn> (func: T): T {
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return wrap(func, function (func) {
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return function (this: any, ...args: any[]) {
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process.activateUvLoop();
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return func.apply(this, args);
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};
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}) as T;
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};
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/**
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* Casts to any below for func are due to Typescript not supporting symbols
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* in index signatures
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*
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* Refs: https://github.com/Microsoft/TypeScript/issues/1863
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*/
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function wrap <T extends AnyFn> (func: T, wrapper: (fn: AnyFn) => T) {
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const wrapped = wrapper(func);
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if ((func as any)[util.promisify.custom]) {
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(wrapped as any)[util.promisify.custom] = wrapper((func as any)[util.promisify.custom]);
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}
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return wrapped;
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}
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process.nextTick = wrapWithActivateUvLoop(process.nextTick);
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global.setImmediate = timers.setImmediate = wrapWithActivateUvLoop(timers.setImmediate);
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global.clearImmediate = timers.clearImmediate;
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// setTimeout needs to update the polling timeout of the event loop, when
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// called under Chromium's event loop the node's event loop won't get a chance
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// to update the timeout, so we have to force the node's event loop to
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// recalculate the timeout in browser process.
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timers.setTimeout = wrapWithActivateUvLoop(timers.setTimeout);
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timers.setInterval = wrapWithActivateUvLoop(timers.setInterval);
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// Only override the global setTimeout/setInterval impls in the browser process
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if (process.type === 'browser') {
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global.setTimeout = timers.setTimeout;
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global.setInterval = timers.setInterval;
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}
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if (process.platform === 'win32') {
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// Always returns EOF for stdin stream.
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const { Readable } = require('stream');
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const stdin = new Readable();
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stdin.push(null);
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Object.defineProperty(process, 'stdin', {
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configurable: false,
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enumerable: true,
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get () {
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return stdin;
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}
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});
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}
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