lib, src: upgrade after v8 api change

This is a big commit that touches just about every file in the src/
directory. The V8 API has changed in significant ways. The most
important changes are:

* Binding functions take a const v8::FunctionCallbackInfo<T>& argument
  rather than a const v8::Arguments& argument.

* Binding functions return void rather than v8::Handle<v8::Value>. The
  return value is returned with the args.GetReturnValue().Set() family
  of functions.

* v8::Persistent<T> no longer derives from v8::Handle<T> and no longer
  allows you to directly dereference the object that the persistent
  handle points to. This means that the common pattern of caching
  oft-used JS values in a persistent handle no longer quite works,
  you first need to reconstruct a v8::Local<T> from the persistent
  handle with the Local<T>::New(isolate, persistent) factory method.

A handful of (internal) convenience classes and functions have been
added to make dealing with the new API a little easier.

The most visible one is node::Cached<T>, which wraps a v8::Persistent<T>
with some template sugar. It can hold arbitrary types but so far it's
exclusively used for v8::Strings (which was by far the most commonly
cached handle type.)

1 files changed, 32 insertions, 25 deletions

diff --git a/src/handle_wrap.h b/src/handle_wrap.h
index 3a42148a62..d8194b97b0 100644
--- a/src/handle_wrap.h
+++ b/src/handle_wrap.h
@@ -53,31 +53,38 @@ namespace node {
       args.This()->GetAlignedPointerFromInternalField(0));
 
 class HandleWrap {
-  public:
-    static void Initialize(v8::Handle<v8::Object> target);
-    static v8::Handle<v8::Value> Close(const v8::Arguments& args);
-    static v8::Handle<v8::Value> Ref(const v8::Arguments& args);
-    static v8::Handle<v8::Value> Unref(const v8::Arguments& args);
-
-    inline uv_handle_t* GetHandle() { return handle__; };
-
-  protected:
-    HandleWrap(v8::Handle<v8::Object> object, uv_handle_t* handle);
-    virtual ~HandleWrap();
-
-    v8::Persistent<v8::Object> object_;
-
-  private:
-    friend v8::Handle<v8::Value> GetActiveHandles(const v8::Arguments&);
-    static void OnClose(uv_handle_t* handle);
-    QUEUE handle_wrap_queue_;
-    // Using double underscore due to handle_ member in tcp_wrap. Probably
-    // tcp_wrap should rename it's member to 'handle'.
-    uv_handle_t* handle__;
-    unsigned int flags_;
-
-    static const unsigned int kUnref = 1;
-    static const unsigned int kCloseCallback = 2;
+public:
+  static void Initialize(v8::Handle<v8::Object> target);
+  static void Close(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void Ref(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void Unref(const v8::FunctionCallbackInfo<v8::Value>& args);
+
+  inline uv_handle_t* GetHandle() { return handle__; };
+
+protected:
+  HandleWrap(v8::Handle<v8::Object> object, uv_handle_t* handle);
+  virtual ~HandleWrap();
+
+  inline v8::Local<v8::Object> object() {
+    return v8::Local<v8::Object>::New(node_isolate, persistent());
+  }
+
+  inline v8::Persistent<v8::Object>& persistent() {
+    return object_;
+  }
+
+private:
+  friend void GetActiveHandles(const v8::FunctionCallbackInfo<v8::Value>&);
+  static void OnClose(uv_handle_t* handle);
+  v8::Persistent<v8::Object> object_;
+  QUEUE handle_wrap_queue_;
+  // Using double underscore due to handle_ member in tcp_wrap. Probably
+  // tcp_wrap should rename it's member to 'handle'.
+  uv_handle_t* handle__;
+  unsigned int flags_;
+
+  static const unsigned int kUnref = 1;
+  static const unsigned int kCloseCallback = 2;
 };