[WIP] New GC related APIs.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 8dabef0d5885448bfdd590c37f88ab4dfe8218a0..b983a6d417b5fdef1e04bd1ca4ad9a1660ca9a5b 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -142,6 +142,31 @@ class Isolate;
 class Object;
 }
 
+// Generic-purpose unique identifier.
+class UniqueId {
+ public:
+  UniqueId()

[Sven Panne, 2013/04/10 10:58:52]

Do we need this? I can't imagine a use case, UniqueId is immutable, which is a
very good thing BTW.

[marja, 2013/04/10 13:14:51]

Removed.

+      : data_(0) {}
+
+  explicit UniqueId(intptr_t data)
+      : data_(data) {}
+
+  bool operator==(const UniqueId& other) const {
+    return data_ == other.data_;
+  }
+
+  bool operator!=(const UniqueId& other) const {
+    return data_ == other.data_;
+  }
+
+  bool operator<(const UniqueId& other) const {
+    return data_ < other.data_;
+  }
+
+ private:
+  intptr_t data_;
+};
+
 
 // --- Weak Handles ---
 
@@ -3440,6 +3465,8 @@ class V8EXPORT V8 {
    * for partially dependent handles only.
    * See v8-profiler.h for RetainedObjectInfo interface description.
    */
+  // TODO(marja): deprecate AddObjectGroup. Use SetObjectGroupID and
+  // SetRetainedObjectInfo instead.
   static void AddObjectGroup(Persistent<Value>* objects,
                              size_t length,
                              RetainedObjectInfo* info = NULL);
@@ -3448,6 +3475,14 @@ class V8EXPORT V8 {
                              size_t length,
                              RetainedObjectInfo* info = NULL);
 
+  static void SetObjectGroupId(Isolate* isolate,
+                               const Persistent<Value>& object,
+                               UniqueId id);
+
+  static void SetRetainedObjectInfo(Isolate* isolate,
+                                    UniqueId id,
+                                    RetainedObjectInfo* info);
+
   /**
    * Allows the host application to declare implicit references between
    * the objects: if |parent| is alive, all |children| are alive too.