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Isolate native module system again
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See: nodejs/node-v0.x-archive@2e5dfaf#commitcomment-239719
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@felixge @ry
felixge authored and ry committed Jan 16, 2011
1 parent c3b0d13 commit f39fdf2
Showing 1 changed file with 96 additions and 62 deletions.
158 changes: 96 additions & 62 deletions src/node.js
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Original file line number Diff line number Diff line change
Expand Up @@ -76,67 +76,103 @@
process._needTickCallback();
};

// This contains the source code for the files in lib/
// Like, natives.fs is the contents of lib/fs.js
var natives = process.binding('natives');

// Module System
var Module = (function() {
function Module(id, parent) {
// Native modules don't need a full require function. So we can bootstrap
// most of the system with this mini module system.
var NativeModule = (function() {
function NativeModule(id) {
this.filename = id + '.js';
this.id = id;
this.exports = {};
this.parent = parent;

this.filename = null;
this.loaded = false;
this.exited = false;
this.children = [];
};
}

// Set the environ variable NODE_MODULE_CONTEXTS=1 to make node load all
// modules in thier own context.
Module._contextLoad = (+process.env['NODE_MODULE_CONTEXTS'] > 0);
Module._internalCache = {};
Module._cache = {};
Module._extensions = {};
Module._paths = [];
NativeModule._source = process.binding('natives');
NativeModule._cache = {};

// Native modules don't need a full require function. So we can bootstrap
// most of the system with this mini-require.
Module._requireNative = function(id) {
NativeModule.require = function(id) {
if (id == 'module') {
return Module;
}

if (Module._internalCache[id]) {
return Module._internalCache[id].exports;
var cached = NativeModule.getCached(id);
if (cached) {
return cached.exports;
}

if (!natives[id]) {
if (!NativeModule.exists(id)) {
throw new Error('No such native module ' + id);
}

var filename = id + '.js';
var nativeModule = new NativeModule(id);

var fn = runInThisContext(Module.wrap(natives[id]), filename, true);
nativeModule.compile();
nativeModule.cache();

var m = {id: id, exports: {}};
fn(m.exports, Module._requireNative, m, filename);
m.loaded = true;
Module._internalCache[id] = m;
return m.exports;
return nativeModule.exports;
};

Module.wrap = function(script) {
return Module.wrapper[0] + script + Module.wrapper[1];
NativeModule.getCached = function(id) {
return NativeModule._cache[id];
}

NativeModule.exists = function(id) {
return (id in NativeModule._source);
}

NativeModule.getSource = function(id) {
return NativeModule._source[id];
}

NativeModule.wrap = function(script) {
return NativeModule.wrapper[0] + script + NativeModule.wrapper[1];
};

Module.wrapper = [
NativeModule.wrapper = [
'(function (exports, require, module, __filename, __dirname) { ',
'\n});'
];

var path = Module._requireNative('path');
NativeModule.prototype.compile = function() {
var source = NativeModule.getSource(this.id);
source = NativeModule.wrap(source);

var fn = runInThisContext(source, this.filename, true);
fn(this.exports, NativeModule.require, this, this.filename);

this.loaded = true;
};

NativeModule.prototype.cache = function() {
NativeModule._cache[this.id] = this;
};

return NativeModule;
})();

// Module System
var Module = (function() {
function Module(id, parent) {
this.id = id;
this.exports = {};
this.parent = parent;

this.filename = null;
this.loaded = false;
this.exited = false;
this.children = [];
};

// Set the environ variable NODE_MODULE_CONTEXTS=1 to make node load all
// modules in thier own context.
Module._contextLoad = (+process.env['NODE_MODULE_CONTEXTS'] > 0);
Module._cache = {};
Module._extensions = {};
Module._paths = [];

Module.wrapper = NativeModule.wrapper;
Module.wrap = NativeModule.wrap;

var path = NativeModule.require('path');

Module._debug = function() {};
if (process.env.NODE_DEBUG && /module/.test(process.env.NODE_DEBUG)) {
Expand All @@ -159,7 +195,7 @@
// -> a.<ext>
// -> a/index.<ext>
Module._findPath = function(request, paths) {
var fs = Module._requireNative('fs');
var fs = NativeModule.require('fs');
var exts = Object.keys(Module._extensions);

if (request.charAt(0) === '/') {
Expand Down Expand Up @@ -201,7 +237,7 @@
}

Module._resolveLookupPaths = function(request, parent) {
if (natives[request]) {
if (NativeModule.exists(request)) {
return [request, []];
}

Expand Down Expand Up @@ -250,19 +286,17 @@
return cachedModule.exports;
}

// With natives id === request
// We deal with these first
if (natives[id]) {
if (NativeModule.exists(id)) {
// REPL is a special case, because it needs the real require.
if (id == 'repl') {
var replModule = new Module('repl');
replModule._compile(natives.repl, 'repl.js');
Module._internalCache.repl = replModule;
replModule._compile(NativeModule.getSource('repl'), 'repl.js');
NativeModule._cache.repl = replModule;
return replModule.exports;
}

debug('load native module ' + request);
return Module._requireNative(id);
return NativeModule.require(id);
}

var module = new Module(id, parent);
Expand All @@ -272,7 +306,7 @@
};

Module._resolveFilename = function(request, parent) {
if (natives[request]) {
if (NativeModule.exists(request)) {
return [request, request];
}

Expand Down Expand Up @@ -375,7 +409,7 @@

// Native extension for .js
Module._extensions['.js'] = function(module, filename) {
var content = Module._requireNative('fs').readFileSync(filename, 'utf8');
var content = NativeModule.require('fs').readFileSync(filename, 'utf8');
module._compile(content, filename);
};

Expand Down Expand Up @@ -424,7 +458,7 @@

// Load events module in order to access prototype elements on process like
// process.addListener.
var events = Module._requireNative('events');
var events = NativeModule.require('events');

// Signal Handlers
(function() {
Expand Down Expand Up @@ -471,22 +505,22 @@


global.setTimeout = function() {
var t = Module._requireNative('timers');
var t = NativeModule.require('timers');
return t.setTimeout.apply(this, arguments);
};

global.setInterval = function() {
var t = Module._requireNative('timers');
var t = NativeModule.require('timers');
return t.setInterval.apply(this, arguments);
};

global.clearTimeout = function() {
var t = Module._requireNative('timers');
var t = NativeModule.require('timers');
return t.clearTimeout.apply(this, arguments);
};

global.clearInterval = function() {
var t = Module._requireNative('timers');
var t = NativeModule.require('timers');
return t.clearInterval.apply(this, arguments);
};

Expand All @@ -498,8 +532,8 @@
if (stdout) return stdout;

var binding = process.binding('stdio'),
net = Module._requireNative('net'),
fs = Module._requireNative('fs'),
net = NativeModule.require('net'),
fs = NativeModule.require('fs'),
fd = binding.stdoutFD;

if (binding.isStdoutBlocking()) {
Expand All @@ -521,8 +555,8 @@
if (stdin) return stdin;

var binding = process.binding('stdio'),
net = Module._requireNative('net'),
fs = Module._requireNative('fs'),
net = NativeModule.require('net'),
fs = NativeModule.require('fs'),
fd = binding.openStdin();

if (binding.isStdinBlocking()) {
Expand All @@ -544,11 +578,11 @@

// Lazy load console object
global.__defineGetter__('console', function() {
return Module._requireNative('console');
return NativeModule.require('console');
});


global.Buffer = Module._requireNative('buffer').Buffer;
global.Buffer = NativeModule.require('buffer').Buffer;

process.exit = function(code) {
process.emit('exit', code || 0);
Expand All @@ -563,7 +597,7 @@


var cwd = process.cwd();
var path = Module._requireNative('path');
var path = NativeModule.require('path');
var isWindows = process.platform === 'win32';

// Make process.argv[0] and process.argv[1] into full paths, but only
Expand All @@ -579,17 +613,17 @@
// To allow people to extend Node in different ways, this hook allows
// one to drop a file lib/_third_party_main.js into the build directory
// which will be executed instead of Node's normal loading.
if (process.binding('natives')['_third_party_main']) {
if (NativeModule.exists('_third_party_main')) {
process.nextTick(function () {
Module._requireNative('_third_party_main');
NativeModule.require('_third_party_main');
});
return;
}

if (process.argv[1]) {
if (process.argv[1] == 'debug') {
// Start the debugger agent
var d = Module._requireNative('_debugger');
var d = NativeModule.require('_debugger');
d.start();
return;
}
Expand Down

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