/
init.js
57 lines (48 loc) · 1.96 KB
/
init.js
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'use strict'
const timers = require('timers')
const util = require('util')
process.atomBinding = require('@electron/internal/common/atom-binding-setup')(process.binding, process.type)
// setImmediate and process.nextTick makes use of uv_check and uv_prepare to
// run the callbacks, however since we only run uv loop on requests, the
// callbacks wouldn't be called until something else activated the uv loop,
// which would delay the callbacks for arbitrary long time. So we should
// initiatively activate the uv loop once setImmediate and process.nextTick is
// called.
const wrapWithActivateUvLoop = function (func) {
return wrap(func, function (func) {
return function () {
process.activateUvLoop()
return func.apply(this, arguments)
}
})
}
function wrap (func, wrapper) {
const wrapped = wrapper(func)
if (func[util.promisify.custom]) {
wrapped[util.promisify.custom] = wrapper(func[util.promisify.custom])
}
return wrapped
}
process.nextTick = wrapWithActivateUvLoop(process.nextTick)
global.setImmediate = timers.setImmediate = wrapWithActivateUvLoop(timers.setImmediate)
global.clearImmediate = timers.clearImmediate
// setTimeout needs to update the polling timeout of the event loop, when
// called under Chromium's event loop the node's event loop won't get a chance
// to update the timeout, so we have to force the node's event loop to
// recalculate the timeout in browser process.
timers.setTimeout = wrapWithActivateUvLoop(timers.setTimeout)
timers.setInterval = wrapWithActivateUvLoop(timers.setInterval)
// Only override the global setTimeout/setInterval impls in the browser process
if (process.type === 'browser') {
global.setTimeout = timers.setTimeout
global.setInterval = timers.setInterval
}
if (process.platform === 'win32') {
// Always returns EOF for stdin stream.
const { Readable } = require('stream')
const stdin = new Readable()
stdin.push(null)
process.__defineGetter__('stdin', function () {
return stdin
})
}