Neutering API for v8::ArrayBuffer

src/api.cc

 // 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 6094 matching lines @@
   obj->set_is_external(true);
   size_t byte_length = static_cast<size_t>(obj->byte_length()->Number());
   ApiCheck(contents->data_ == NULL,
            "v8::ArrayBuffer::Externalize",
            "Externalizing into non-empty ArrayBufferContents");
   contents->data_ = obj->backing_store();
   contents->byte_length_ = byte_length;
 }
 
 
+void v8::ArrayBuffer::Neuter() {
+  i::Handle<i::JSArrayBuffer> obj = Utils::OpenHandle(this);
+  i::Isolate* isolate = obj->GetIsolate();
+  ApiCheck(obj->is_external(),
+           "v8::ArrayBuffer::Neuter",
+           "Only externalized ArrayBuffers can be neutered");
+  LOG_API(obj->GetIsolate(), "v8::ArrayBuffer::Neuter()");
+  ENTER_V8(isolate);
+
+  for (i::Handle<i::Object> array_obj(obj->weak_first_array(), isolate);
+       *array_obj != i::Smi::FromInt(0);) {
+    i::Handle<i::JSTypedArray> typed_array(i::JSTypedArray::cast(*array_obj));
+    typed_array->Neuter();
+    array_obj = i::handle(typed_array->weak_next(), isolate);
+  }
+  obj->Neuter();
+}
+
+
 size_t v8::ArrayBuffer::ByteLength() const {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   if (IsDeadCheck(isolate, "v8::ArrayBuffer::ByteLength()")) return 0;
   i::Handle<i::JSArrayBuffer> obj = Utils::OpenHandle(this);
   return static_cast<size_t>(obj->byte_length()->Number());
 }
 
 
 Local<ArrayBuffer> v8::ArrayBuffer::New(size_t byte_length) {
   i::Isolate* isolate = i::Isolate::Current();
@@ skipping 1812 matching lines @@
 
   v->VisitPointers(blocks_.first(), first_block_limit_);
 
   for (int i = 1; i < blocks_.length(); i++) {
     v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]);
   }
 }
 
 
 } }  // namespace v8::internal