00.txt

$ vim src/tcp_wrap.cc

01.cc

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

#include "node.h"
#include "node_buffer.h"
#include "req_wrap.h"
#include "handle_wrap.h"
#include "stream_wrap.h"
#include "tcp_wrap.h"

#include <stdlib.h>


namespace node {

using v8::Arguments;
using v8::Context;
using v8::Function;
using v8::FunctionTemplate;
using v8::Handle;
using v8::HandleScope;
using v8::Integer;
using v8::Local;
using v8::Null;
using v8::Object;
using v8::Persistent;
using v8::PropertyAttribute;
using v8::String;
using v8::TryCatch;
using v8::Undefined;
using v8::Value;

static Persistent<Function> tcpConstructor;
static Persistent<String> oncomplete_sym;
static Persistent<String> onconnection_sym;


typedef class ReqWrap<uv_connect_t> ConnectWrap;

Local<Object> AddressToJS(const sockaddr* addr);


Local<Object> TCPWrap::Instantiate() {
  // If this assert fire then process.binding('tcp_wrap') hasn't been
  // called yet.
  assert(tcpConstructor.IsEmpty() == false);

  HandleScope scope;
  Local<Object> obj = tcpConstructor->NewInstance();

02.cc

using v8::Value;

static Persistent<Function> tcpConstructor;
static Persistent<String> oncomplete_sym;
static Persistent<String> onconnection_sym;


typedef class ReqWrap<uv_connect_t> ConnectWrap;

Local<Object> AddressToJS(const sockaddr* addr);


// add the function here.
// Below all the definitions at the top
Handle<Value> TCPWrap::Hello(const Arguments& args) {
}


Local<Object> TCPWrap::Instantiate() {
  // If this assert fire then process.binding('tcp_wrap') hasn't been
  // called yet.
  assert(tcpConstructor.IsEmpty() == false);

  HandleScope scope;
  Local<Object> obj = tcpConstructor->NewInstance();

03.cc

using v8::Value;

static Persistent<Function> tcpConstructor;
static Persistent<String> oncomplete_sym;
static Persistent<String> onconnection_sym;


typedef class ReqWrap<uv_connect_t> ConnectWrap;

Local<Object> AddressToJS(const sockaddr* addr);


// add the function here.
// Below all the definitions at the top
Handle<Value> TCPWrap::Hello(const Arguments& args) {
  // Define a HandleScope.  This lets the garbage collector
  // do the magic thing with cleaning up any data we create
  HandleScope scope;
}


Local<Object> TCPWrap::Instantiate() {
  // If this assert fire then process.binding('tcp_wrap') hasn't been
  // called yet.
  assert(tcpConstructor.IsEmpty() == false);

  HandleScope scope;
  Local<Object> obj = tcpConstructor->NewInstance();

030.cc

// add the function here.
// Below all the definitions at the top
Handle<Value> TCPWrap::Hello(const Arguments& args) {
  // Define a HandleScope.  This lets the garbage collector
  // do the magic thing with cleaning up any data we create
  HandleScope scope;
}

04.cc

// add the function here.
// Below all the definitions at the top
Handle<Value> TCPWrap::Hello(const Arguments& args) {
  // Define a HandleScope.  This lets the garbage collector
  // do the magic thing with cleaning up any data we create
  HandleScope scope;

  // Return the JavaScript string "world"
  return scope.Close(String::New("world"));
}

05.cc

void TCPWrap::Initialize(Handle<Object> target) {
  // ...
  // lots of TCP stuff
  // ...

  target->Set(String::NewSymbol("TCP"), tcpConstructor);
}

06.cc

void TCPWrap::Initialize(Handle<Object> target) {
  // ...
  // lots of TCP stuff
  // ...

  target->Set(String::NewSymbol("TCP"), tcpConstructor);

  // Export our function here.
  NODE_SET_METHOD(target, "hello", Hello);
}

060.txt

$ vim src/tcp_wrap.h

061.cc

//
// blah blah copyright
//

#ifndef TCP_WRAP_H_
#define TCP_WRAP_H_
#include "stream_wrap.h"

namespace node {

class TCPWrap : public StreamWrap {
 public:
   // public stuff....

 private:
  // private stuff....
  static v8::Handle<v8::Value> Connect6(const v8::Arguments& args);
  static v8::Handle<v8::Value> Open(const v8::Arguments& args);

062.cc

 private:
  // private stuff....
  static v8::Handle<v8::Value> Connect6(const v8::Arguments& args);
  static v8::Handle<v8::Value> Open(const v8::Arguments& args);
  static v8::Handle<v8::Value> Hello(const v8::Arguments& args);

07.txt

$ make -j4
make -C out BUILDTYPE=Release V=
  CXX(target) /tmp/node/out/Release/obj.target/node/src/tcp_wrap.o
  LINK(target) /tmp/node/out/Release/node
ld: warning: alignment lost in merging tentative definition _OPENSSL_ia32cap_P
ld: warning: _OPENSSL_ia32cap_P has different visibility (hidden) in
/tmp/node/out/Release/libopenssl.a(x86_64cpuid.o) and (default) in
/tmp/node/out/Release/libopenssl.a(cryptlib.o)
  LINK(target) /tmp/node/out/Release/node: Finished
ln -fs out/Release/node node

## then demo the first part...

08.txt

$ vim lib/net.js

09.js

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var events = require('events');
var stream = require('stream');
var timers = require('timers');
var util = require('util');
var assert = require('assert');
var cares = process.binding('cares_wrap');
var cluster;

function noop() {}

// ... lots more net.js stuff

10.js

function noop() {}

// Export the hello function
exports.hello = function() {
  return process.binding('tcp_wrap').hello();
};

// ... lots more net.js stuff

11.txt

$ ./node test/simple/test-net-hello.js

assert.js:92
  throw new assert.AssertionError({
        ^
AssertionError: "undefined" == "function"
    at Object.<anonymous> (/tmp/node/test/simple/test-net-hello.js:29:8)
    at Module._compile (module.js:449:26)
    at Object.Module._extensions..js (module.js:467:10)
    at Module.load (module.js:349:32)
    at Function.Module._load (module.js:305:12)
    at Function.Module.runMain (module.js:490:10)
    at startup (node.js:119:16)
    at node.js:827:3

12.txt

$ make -j4
make -C out BUILDTYPE=Release V=
  ACTION _tmp_node_node_gyp_node_js2c_host_node_js2c /tmp/node/out/Release/obj/gen/node_natives.h
  CXX(target) /tmp/node/out/Release/obj.target/node/src/node_javascript.o
  LINK(target) /tmp/node/out/Release/node
ld: warning: alignment lost in merging tentative definition _OPENSSL_ia32cap_P
ld: warning: _OPENSSL_ia32cap_P has different visibility (hidden) in
/tmp/node/out/Release/libopenssl.a(x86_64cpuid.o) and (default) in
/tmp/node/out/Release/libopenssl.a(cryptlib.o)
  LINK(target) /tmp/node/out/Release/node: Finished
ln -fs out/Release/node node

13.txt

$ ./node test/simple/test-net-hello.js
ok

## TEST PASSES! WoOo!