Provide a C++ Buffer constructor for external storage.

In order to do this, buffer data management was moved out of the
JS entry-point New, and into Replace.

Secondly, the constructor makes an immediate call to Replace, and
in order for ArrayData calls to work, wrapping must already be set
up. Now, the constructor takes the wrappee as a parameter.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/node_buffer.h b/src/node_buffer.h
index 5fa8c8aa5..3221417f2 100644
--- a/src/node_buffer.h
+++ b/src/node_buffer.h
@@ -22,9 +22,13 @@ class Buffer : public ObjectWrap {
  public:
   ~Buffer();
 
+  typedef void (*free_callback)(char *data, void *hint);
+
   static void Initialize(v8::Handle<v8::Object> target);
   static Buffer* New(size_t length); // public constructor
   static Buffer* New(char *data, size_t len); // public constructor
+  static Buffer* New(char *data, size_t length,
+                     free_callback callback, void *hint); // public constructor
   static bool HasInstance(v8::Handle<v8::Value> val);
 
   static char* Data(v8::Handle<v8::Object>);
@@ -56,10 +60,13 @@ class Buffer : public ObjectWrap {
   static v8::Handle<v8::Value> MakeFastBuffer(const v8::Arguments &args);
   static v8::Handle<v8::Value> Copy(const v8::Arguments &args);
 
-  Buffer(size_t length);
+  Buffer(v8::Handle<v8::Object> wrapper, size_t length);
+  void Replace(char *data, size_t length, free_callback callback, void *hint);
 
   size_t length_;
   char* data_;
+  free_callback callback_;
+  void* callback_hint_;
 };