src: unifying PipeConnectWrap and TCPConnectWrap

This commit attempts to address one of the items in nodejs#4641 which is
related to src/pipe_wrap.cc and src/tcp_wrap.cc. Currently both
pipe_wrap.cc and tcp_wrap.cc contain a class that are almost
identical. This commit extracts these parts into a separate class
that both can share.

PR-URL: nodejs#7501
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

node.gyp

@@ -142,6 +142,7 @@
         'src/fs_event_wrap.cc',
         'src/cares_wrap.cc',
         'src/connection_wrap.cc',
+        'src/connect_wrap.cc',
         'src/handle_wrap.cc',
         'src/js_stream.cc',
         'src/node.cc',
@@ -179,6 +180,7 @@
         'src/base-object.h',
         'src/base-object-inl.h',
         'src/connection_wrap.h',
+        'src/connect_wrap.h',
         'src/debug-agent.h',
         'src/env.h',
         'src/env-inl.h',

src/connect_wrap.cc

@@ -0,0 +1,22 @@
+#include "connect_wrap.h"
+
+#include "env.h"
+#include "env-inl.h"
+#include "req-wrap.h"
+#include "req-wrap-inl.h"
+#include "util.h"
+#include "util-inl.h"
+
+namespace node {
+
+using v8::Local;
+using v8::Object;
+
+
+ConnectWrap::ConnectWrap(Environment* env,
+    Local<Object> req_wrap_obj,
+    AsyncWrap::ProviderType provider) : ReqWrap(env, req_wrap_obj, provider) {
+  Wrap(req_wrap_obj, this);
+}
+
+}  // namespace node

src/connect_wrap.h

@@ -0,0 +1,26 @@
+#ifndef SRC_CONNECT_WRAP_H_
+#define SRC_CONNECT_WRAP_H_
+
+#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
+
+#include "env.h"
+#include "req-wrap.h"
+#include "async-wrap.h"
+#include "v8.h"
+
+namespace node {
+
+class ConnectWrap : public ReqWrap<uv_connect_t> {
+ public:
+  ConnectWrap(Environment* env,
+              v8::Local<v8::Object> req_wrap_obj,
+              AsyncWrap::ProviderType provider);
+
+  size_t self_size() const override { return sizeof(*this); }
+};
+
+}  // namespace node
+
+#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
+
+#endif  // SRC_CONNECT_WRAP_H_

src/pipe_wrap.cc

@@ -8,8 +8,7 @@
 #include "node.h"
 #include "node_buffer.h"
 #include "node_wrap.h"
-#include "req-wrap.h"
-#include "req-wrap-inl.h"
+#include "connect_wrap.h"
 #include "stream_wrap.h"
 #include "util-inl.h"
 #include "util.h"
@@ -31,26 +30,6 @@ using v8::String;
 using v8::Value;
 
 
-// TODO(bnoordhuis) share with TCPWrap?
-class PipeConnectWrap : public ReqWrap<uv_connect_t> {
- public:
-  PipeConnectWrap(Environment* env, Local<Object> req_wrap_obj);
-
-  size_t self_size() const override { return sizeof(*this); }
-};
-
-
-PipeConnectWrap::PipeConnectWrap(Environment* env, Local<Object> req_wrap_obj)
-    : ReqWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_PIPECONNECTWRAP) {
-  Wrap(req_wrap_obj, this);
-}
-
-
-static void NewPipeConnectWrap(const FunctionCallbackInfo<Value>& args) {
-  CHECK(args.IsConstructCall());
-}
-
-
 Local<Object> PipeWrap::Instantiate(Environment* env, AsyncWrap* parent) {
   EscapableHandleScope handle_scope(env->isolate());
   CHECK_EQ(false, env->pipe_constructor_template().IsEmpty());
@@ -92,8 +71,10 @@ void PipeWrap::Initialize(Local<Object> target,
   env->set_pipe_constructor_template(t);
 
   // Create FunctionTemplate for PipeConnectWrap.
-  Local<FunctionTemplate> cwt =
-      FunctionTemplate::New(env->isolate(), NewPipeConnectWrap);
+  auto constructor = [](const FunctionCallbackInfo<Value>& args) {
+    CHECK(args.IsConstructCall());
+  };
+  auto cwt = FunctionTemplate::New(env->isolate(), constructor);
   cwt->InstanceTemplate()->SetInternalFieldCount(1);
   cwt->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "PipeConnectWrap"));
   target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "PipeConnectWrap"),
@@ -163,7 +144,7 @@ void PipeWrap::Listen(const FunctionCallbackInfo<Value>& args) {
 
 // TODO(bnoordhuis) Maybe share this with TCPWrap?
 void PipeWrap::AfterConnect(uv_connect_t* req, int status) {
-  PipeConnectWrap* req_wrap = static_cast<PipeConnectWrap*>(req->data);
+  ConnectWrap* req_wrap = static_cast<ConnectWrap*>(req->data);
   PipeWrap* wrap = static_cast<PipeWrap*>(req->handle->data);
   CHECK_EQ(req_wrap->env(), wrap->env());
   Environment* env = wrap->env();
@@ -226,7 +207,8 @@ void PipeWrap::Connect(const FunctionCallbackInfo<Value>& args) {
   Local<Object> req_wrap_obj = args[0].As<Object>();
   node::Utf8Value name(env->isolate(), args[1]);
 
-  PipeConnectWrap* req_wrap = new PipeConnectWrap(env, req_wrap_obj);
+  ConnectWrap* req_wrap =
+      new ConnectWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_PIPECONNECTWRAP);
   uv_pipe_connect(&req_wrap->req_,
                   &wrap->handle_,
                   *name,

src/tcp_wrap.cc

@@ -6,8 +6,7 @@
 #include "handle_wrap.h"
 #include "node_buffer.h"
 #include "node_wrap.h"
-#include "req-wrap.h"
-#include "req-wrap-inl.h"
+#include "connect_wrap.h"
 #include "stream_wrap.h"
 #include "util.h"
 #include "util-inl.h"
@@ -32,24 +31,6 @@ using v8::String;
 using v8::Value;
 
 
-class TCPConnectWrap : public ReqWrap<uv_connect_t> {
- public:
-  TCPConnectWrap(Environment* env, Local<Object> req_wrap_obj);
-  size_t self_size() const override { return sizeof(*this); }
-};
-
-
-TCPConnectWrap::TCPConnectWrap(Environment* env, Local<Object> req_wrap_obj)
-    : ReqWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_TCPCONNECTWRAP) {
-  Wrap(req_wrap_obj, this);
-}
-
-
-static void NewTCPConnectWrap(const FunctionCallbackInfo<Value>& args) {
-  CHECK(args.IsConstructCall());
-}
-
-
 Local<Object> TCPWrap::Instantiate(Environment* env, AsyncWrap* parent) {
   EscapableHandleScope handle_scope(env->isolate());
   CHECK_EQ(env->tcp_constructor_template().IsEmpty(), false);
@@ -112,8 +93,10 @@ void TCPWrap::Initialize(Local<Object> target,
   env->set_tcp_constructor_template(t);
 
   // Create FunctionTemplate for TCPConnectWrap.
-  Local<FunctionTemplate> cwt =
-      FunctionTemplate::New(env->isolate(), NewTCPConnectWrap);
+  auto constructor = [](const FunctionCallbackInfo<Value>& args) {
+    CHECK(args.IsConstructCall());
+  };
+  auto cwt = FunctionTemplate::New(env->isolate(), constructor);
   cwt->InstanceTemplate()->SetInternalFieldCount(1);
   cwt->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "TCPConnectWrap"));
   target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "TCPConnectWrap"),
@@ -253,7 +236,7 @@ void TCPWrap::Listen(const FunctionCallbackInfo<Value>& args) {
 
 
 void TCPWrap::AfterConnect(uv_connect_t* req, int status) {
-  TCPConnectWrap* req_wrap = static_cast<TCPConnectWrap*>(req->data);
+  ConnectWrap* req_wrap = static_cast<ConnectWrap*>(req->data);
   TCPWrap* wrap = static_cast<TCPWrap*>(req->handle->data);
   CHECK_EQ(req_wrap->env(), wrap->env());
   Environment* env = wrap->env();
@@ -300,7 +283,8 @@ void TCPWrap::Connect(const FunctionCallbackInfo<Value>& args) {
   int err = uv_ip4_addr(*ip_address, port, &addr);
 
   if (err == 0) {
-    TCPConnectWrap* req_wrap = new TCPConnectWrap(env, req_wrap_obj);
+    ConnectWrap* req_wrap =
+        new ConnectWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_TCPCONNECTWRAP);
     err = uv_tcp_connect(&req_wrap->req_,
                          &wrap->handle_,
                          reinterpret_cast<const sockaddr*>(&addr),
@@ -334,7 +318,8 @@ void TCPWrap::Connect6(const FunctionCallbackInfo<Value>& args) {
   int err = uv_ip6_addr(*ip_address, port, &addr);
 
   if (err == 0) {
-    TCPConnectWrap* req_wrap = new TCPConnectWrap(env, req_wrap_obj);
+    ConnectWrap* req_wrap =
+        new ConnectWrap(env, req_wrap_obj, AsyncWrap::PROVIDER_TCPCONNECTWRAP);
     err = uv_tcp_connect(&req_wrap->req_,
                          &wrap->handle_,
                          reinterpret_cast<const sockaddr*>(&addr),