expose AssertNoAllocation to api

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3586 matching lines @@
  */
 class V8EXPORT PersistentHandleVisitor {  // NOLINT
  public:
   virtual ~PersistentHandleVisitor() {}
   virtual void VisitPersistentHandle(Persistent<Value> value,
                                      uint16_t class_id) {}
 };
 
 
 /**
+ * Asserts that no action is performed that could cause a handle's value
+ * to be modified. Useful when otherwise unsafe handle operations need to
+ * be performed.
+ */
+class V8EXPORT AssertNoGCScope {
+#ifndef DEBUG
+  V8_INLINE(AssertNoGCScope(Isolate* isolate)) {}
+#else
+  AssertNoGCScope(Isolate* isolate);
+  ~AssertNoGCScope();
+ private:
+  Isolate* isolate_;
+  bool last_state_;
+#endif
+};
+
+
+/**
  * Container class for static utility functions.
  */
 class V8EXPORT V8 {
  public:
   /** Set the callback to invoke in case of fatal errors. */
   static void SetFatalErrorHandler(FatalErrorCallback that);
 
   /**
    * Set the callback to invoke to check if code generation from
    * strings should be allowed.
@@ skipping 1962 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_