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lib,src: refactor src/node.js into internal files
PR-URL: #5103 Reviewed-By: Trevor Norris <[email protected]> Reviewed-By: James M Snell <[email protected]>
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‎lib/internal/process.js‎

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'use strict';
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var _lazyConstants = null;
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function lazyConstants() {
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if (!_lazyConstants) {
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_lazyConstants = process.binding('constants');
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}
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return _lazyConstants;
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}
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exports.setup_hrtime = setup_hrtime;
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exports.setupConfig = setupConfig;
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exports.setupKillAndExit = setupKillAndExit;
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exports.setupSignalHandlers = setupSignalHandlers;
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exports.setupChannel = setupChannel;
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exports.setupRawDebug = setupRawDebug;
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const assert = process.assert = function(x, msg) {
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if (!x) throw new Error(msg || 'assertion error');
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};
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function setup_hrtime() {
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const _hrtime = process.hrtime;
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const hrValues = new Uint32Array(3);
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process.hrtime = function hrtime(ar) {
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_hrtime(hrValues);
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if (typeof ar !== 'undefined') {
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if (Array.isArray(ar)) {
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const sec = (hrValues[0] * 0x100000000 + hrValues[1]) - ar[0];
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const nsec = hrValues[2] - ar[1];
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return [nsec < 0 ? sec - 1 : sec, nsec < 0 ? nsec + 1e9 : nsec];
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}
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throw new TypeError('process.hrtime() only accepts an Array tuple');
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}
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return [
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hrValues[0] * 0x100000000 + hrValues[1],
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hrValues[2]
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];
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};
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}
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function setupConfig(_source) {
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// NativeModule._source
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// used for `process.config`, but not a real module
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var config = _source.config;
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delete _source.config;
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// strip the gyp comment line at the beginning
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config = config.split('\n')
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.slice(1)
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.join('\n')
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.replace(/"/g, '\\"')
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.replace(/'/g, '"');
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process.config = JSON.parse(config, function(key, value) {
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if (value === 'true') return true;
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if (value === 'false') return false;
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return value;
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});
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}
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function setupKillAndExit() {
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process.exit = function(code) {
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if (code || code === 0)
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process.exitCode = code;
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if (!process._exiting) {
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process._exiting = true;
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process.emit('exit', process.exitCode || 0);
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}
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process.reallyExit(process.exitCode || 0);
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};
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process.kill = function(pid, sig) {
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var err;
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if (pid != (pid | 0)) {
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throw new TypeError('invalid pid');
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}
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// preserve null signal
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if (0 === sig) {
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err = process._kill(pid, 0);
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} else {
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sig = sig || 'SIGTERM';
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if (lazyConstants()[sig] &&
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sig.slice(0, 3) === 'SIG') {
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err = process._kill(pid, lazyConstants()[sig]);
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} else {
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throw new Error(`Unknown signal: ${sig}`);
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}
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}
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if (err) {
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var errnoException = require('util')._errnoException;
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throw errnoException(err, 'kill');
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}
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return true;
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};
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}
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function setupSignalHandlers() {
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// Load events module in order to access prototype elements on process like
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// process.addListener.
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var signalWraps = {};
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function isSignal(event) {
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return typeof event === 'string' &&
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event.slice(0, 3) === 'SIG' &&
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lazyConstants().hasOwnProperty(event);
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}
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// Detect presence of a listener for the special signal types
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process.on('newListener', function(type, listener) {
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if (isSignal(type) &&
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!signalWraps.hasOwnProperty(type)) {
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var Signal = process.binding('signal_wrap').Signal;
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var wrap = new Signal();
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wrap.unref();
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wrap.onsignal = function() { process.emit(type); };
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var signum = lazyConstants()[type];
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var err = wrap.start(signum);
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if (err) {
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wrap.close();
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var errnoException = require('util')._errnoException;
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throw errnoException(err, 'uv_signal_start');
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}
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signalWraps[type] = wrap;
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}
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});
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process.on('removeListener', function(type, listener) {
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if (signalWraps.hasOwnProperty(type) && this.listenerCount(type) === 0) {
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signalWraps[type].close();
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delete signalWraps[type];
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}
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});
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}
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function setupChannel() {
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// If we were spawned with env NODE_CHANNEL_FD then load that up and
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// start parsing data from that stream.
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if (process.env.NODE_CHANNEL_FD) {
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var fd = parseInt(process.env.NODE_CHANNEL_FD, 10);
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assert(fd >= 0);
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// Make sure it's not accidentally inherited by child processes.
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delete process.env.NODE_CHANNEL_FD;
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var cp = require('child_process');
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// Load tcp_wrap to avoid situation where we might immediately receive
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// a message.
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// FIXME is this really necessary?
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process.binding('tcp_wrap');
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cp._forkChild(fd);
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assert(process.send);
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}
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}
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function setupRawDebug() {
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var format = require('util').format;
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var rawDebug = process._rawDebug;
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process._rawDebug = function() {
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rawDebug(format.apply(null, arguments));
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};
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}

‎lib/internal/process/next_tick.js‎

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'use strict';
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exports.setup = setupNextTick;
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function setupNextTick() {
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const promises = require('internal/process/promises');
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const emitPendingUnhandledRejections = promises.setup(scheduleMicrotasks);
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var nextTickQueue = [];
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var microtasksScheduled = false;
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// Used to run V8's micro task queue.
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var _runMicrotasks = {};
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// *Must* match Environment::TickInfo::Fields in src/env.h.
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var kIndex = 0;
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var kLength = 1;
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process.nextTick = nextTick;
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// Needs to be accessible from beyond this scope.
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process._tickCallback = _tickCallback;
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process._tickDomainCallback = _tickDomainCallback;
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// This tickInfo thing is used so that the C++ code in src/node.cc
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// can have easy access to our nextTick state, and avoid unnecessary
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// calls into JS land.
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const tickInfo = process._setupNextTick(_tickCallback, _runMicrotasks);
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_runMicrotasks = _runMicrotasks.runMicrotasks;
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function tickDone() {
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if (tickInfo[kLength] !== 0) {
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if (tickInfo[kLength] <= tickInfo[kIndex]) {
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nextTickQueue = [];
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tickInfo[kLength] = 0;
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} else {
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nextTickQueue.splice(0, tickInfo[kIndex]);
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tickInfo[kLength] = nextTickQueue.length;
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}
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}
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tickInfo[kIndex] = 0;
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}
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function scheduleMicrotasks() {
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if (microtasksScheduled)
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return;
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nextTickQueue.push({
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callback: runMicrotasksCallback,
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domain: null
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});
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tickInfo[kLength]++;
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microtasksScheduled = true;
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}
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function runMicrotasksCallback() {
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microtasksScheduled = false;
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_runMicrotasks();
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if (tickInfo[kIndex] < tickInfo[kLength] ||
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emitPendingUnhandledRejections())
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scheduleMicrotasks();
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}
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function _combinedTickCallback(args, callback) {
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if (args === undefined) {
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callback();
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} else {
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switch (args.length) {
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case 1:
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callback(args[0]);
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break;
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case 2:
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callback(args[0], args[1]);
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break;
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case 3:
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callback(args[0], args[1], args[2]);
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break;
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default:
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callback.apply(null, args);
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}
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}
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}
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// Run callbacks that have no domain.
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// Using domains will cause this to be overridden.
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function _tickCallback() {
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var callback, args, tock;
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do {
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while (tickInfo[kIndex] < tickInfo[kLength]) {
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tock = nextTickQueue[tickInfo[kIndex]++];
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callback = tock.callback;
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args = tock.args;
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// Using separate callback execution functions allows direct
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// callback invocation with small numbers of arguments to avoid the
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// performance hit associated with using `fn.apply()`
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_combinedTickCallback(args, callback);
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if (1e4 < tickInfo[kIndex])
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tickDone();
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}
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tickDone();
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_runMicrotasks();
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emitPendingUnhandledRejections();
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} while (tickInfo[kLength] !== 0);
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}
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function _tickDomainCallback() {
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var callback, domain, args, tock;
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do {
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while (tickInfo[kIndex] < tickInfo[kLength]) {
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tock = nextTickQueue[tickInfo[kIndex]++];
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callback = tock.callback;
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domain = tock.domain;
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args = tock.args;
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if (domain)
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domain.enter();
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// Using separate callback execution functions allows direct
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// callback invocation with small numbers of arguments to avoid the
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// performance hit associated with using `fn.apply()`
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_combinedTickCallback(args, callback);
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if (1e4 < tickInfo[kIndex])
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tickDone();
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if (domain)
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domain.exit();
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}
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tickDone();
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_runMicrotasks();
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emitPendingUnhandledRejections();
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} while (tickInfo[kLength] !== 0);
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}
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function TickObject(c, args) {
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this.callback = c;
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this.domain = process.domain || null;
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this.args = args;
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}
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function nextTick(callback) {
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// on the way out, don't bother. it won't get fired anyway.
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if (process._exiting)
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return;
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var args;
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if (arguments.length > 1) {
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args = new Array(arguments.length - 1);
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for (var i = 1; i < arguments.length; i++)
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args[i - 1] = arguments[i];
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}
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nextTickQueue.push(new TickObject(callback, args));
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tickInfo[kLength]++;
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}
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}

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