api: introduce SealHandleScope

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 1000 matching lines @@
   // Make it hard to create heap-allocated or illegal handle scopes by
   // disallowing certain operations.
   EscapableHandleScope(const EscapableHandleScope&);
   void operator=(const EscapableHandleScope&);
   void* operator new(size_t size);
   void operator delete(void*, size_t);
 
   internal::Object** escape_slot_;
 };
 
+class V8_EXPORT SealHandleScope {
+ public:
+  SealHandleScope(Isolate* isolate);
+  ~SealHandleScope();
+
+ private:
+  // Make it hard to create heap-allocated or illegal handle scopes by
+  // disallowing certain operations.
+  SealHandleScope(const SealHandleScope&);
+  void operator=(const SealHandleScope&);
+  void* operator new(size_t size);
+  void operator delete(void*, size_t);
+
+  internal::Isolate* isolate_;
+  int prev_level_;
+  internal::Object** prev_limit_;
+};
+
 
 // --- Special objects ---
 
 
 /**
  * The superclass of values and API object templates.
  */
 class V8_EXPORT Data {
  private:
   Data();
@@ skipping 7037 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_