[serializer] change internal field callbacks to take data pointer.

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 6263 matching lines @@
   /**
    * Returns the number of wrappers that are still to be traced by the embedder.
    */
   virtual size_t NumberOfWrappersToTrace() { return 0; }
 
  protected:
   virtual ~EmbedderHeapTracer() = default;
 };
 
 /**
- * Callback to the embedder used in SnapshotCreator to handle internal fields.
+ * Callback and supporting data used in SnapshotCreator to implement embedder
+ * logic to serialize internal fields.
  */
-typedef StartupData (*SerializeInternalFieldsCallback)(Local<Object> holder,
-                                                       int index);
+struct SerializeInternalFieldsCallback {
+  typedef StartupData (*CallbackFunction)(Local<Object> holder, int index,
+                                          void* data);
+  SerializeInternalFieldsCallback(CallbackFunction function = nullptr,
+                                  void* data_arg = nullptr)
+      : callback(function), data(data_arg) {}
+  CallbackFunction callback;
+  void* data;
+};
 
 /**
- * Callback to the embedder used to deserialize internal fields.
+ * Callback and supporting data used to implement embedder logic to deserialize
+ * internal fields.
  */
-typedef void (*DeserializeInternalFieldsCallback)(Local<Object> holder,
-                                                  int index,
-                                                  StartupData payload);
+struct DeserializeInternalFieldsCallback {
+  typedef void (*CallbackFunction)(Local<Object> holder, int index,
+                                   StartupData payload, void* data);
+  DeserializeInternalFieldsCallback(CallbackFunction function = nullptr,
+                                    void* data_arg = nullptr)
+      : callback(function), data(data_arg) {}
+  void (*callback)(Local<Object> holder, int index, StartupData payload,
+                   void* data);
+  void* data;
+};
 
 /**
  * Isolate represents an isolated instance of the V8 engine.  V8 isolates have
  * completely separate states.  Objects from one isolate must not be used in
  * other isolates.  The embedder can create multiple isolates and use them in
  * parallel in multiple threads.  An isolate can be entered by at most one
  * thread at any given time.  The Locker/Unlocker API must be used to
  * synchronize.
  */
 class V8_EXPORT Isolate {
@@ skipping 1376 matching lines @@
 
   /**
    * Add additional context to be included in the snapshot blob.
    * The snapshot will include the global proxy.
    *
    * \param callback optional callback to serialize internal fields.
    *
    * \returns the index of the context in the snapshot blob.
    */
   size_t AddContext(Local<Context> context,
-                    SerializeInternalFieldsCallback callback = nullptr);
+                    SerializeInternalFieldsCallback callback =
+                        SerializeInternalFieldsCallback());
 
   /**
    * Add a template to be included in the snapshot blob.
    * \returns the index of the template in the snapshot blob.
    */
   size_t AddTemplate(Local<Template> template_obj);
 
   /**
    * Created a snapshot data blob.
    * This must not be called from within a handle scope.
@@ skipping 319 matching lines @@
    * internal fields. It should match the SerializeInternalFieldCallback used
    * to serialize.
    *
    * \param extensions See v8::Context::New.
    *
    * \param global_object See v8::Context::New.
    */
 
   static MaybeLocal<Context> FromSnapshot(
       Isolate* isolate, size_t context_snapshot_index,
-      DeserializeInternalFieldsCallback internal_fields_deserializer = nullptr,
+      DeserializeInternalFieldsCallback internal_fields_deserializer =
+          DeserializeInternalFieldsCallback(),
       ExtensionConfiguration* extensions = nullptr,
       MaybeLocal<Value> global_object = MaybeLocal<Value>());
 
   /**
    * Returns an global object that isn't backed by an actual context.
    *
    * The global template needs to have access checks with handlers installed.
    * If an existing global object is passed in, the global object is detached
    * from its context.
    *
@@ skipping 1764 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_