Externalization API for 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 6001 matching lines @@
   i::Handle<i::JSObject> paragon_handle(i::JSObject::cast(paragon));
   EXCEPTION_PREAMBLE(isolate);
   ENTER_V8(isolate);
   i::Handle<i::JSObject> result = i::Copy(paragon_handle);
   has_pending_exception = result.is_null();
   EXCEPTION_BAILOUT_CHECK(isolate, Local<Object>());
   return Utils::ToLocal(result);
 }
 
 
+bool v8::ArrayBuffer::IsExternal() const {
+  return Utils::OpenHandle(this)->is_external();
+}
+
+v8::ArrayBufferContents::~ArrayBufferContents() {
+  free(data_);
+  data_ = NULL;
+  byte_length_ = 0;
+}
+
+
+void v8::ArrayBuffer::Externalize(ArrayBufferContents* contents) {
+  i::Handle<i::JSArrayBuffer> obj = Utils::OpenHandle(this);
+  ApiCheck(!obj->is_external(),
+            "v8::ArrayBuffer::Externalize",
+            "ArrayBuffer already externalized");
+  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;
+}
+
+
 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());
 }
 
 
-void* v8::ArrayBuffer::Data() const {
-  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
-  if (IsDeadCheck(isolate, "v8::ArrayBuffer::Data()")) return 0;
-  i::Handle<i::JSArrayBuffer> obj = Utils::OpenHandle(this);
-  return obj->backing_store();
-}
-
-
 Local<ArrayBuffer> v8::ArrayBuffer::New(size_t byte_length) {
   i::Isolate* isolate = i::Isolate::Current();
   EnsureInitializedForIsolate(isolate, "v8::ArrayBuffer::New(size_t)");
   LOG_API(isolate, "v8::ArrayBuffer::New(size_t)");
   ENTER_V8(isolate);
   i::Handle<i::JSArrayBuffer> obj =
       isolate->factory()->NewJSArrayBuffer();
   i::Runtime::SetupArrayBufferAllocatingData(isolate, obj, byte_length);
   return Utils::ToLocal(obj);
 }
 
 
 Local<ArrayBuffer> v8::ArrayBuffer::New(void* data, size_t byte_length) {
   i::Isolate* isolate = i::Isolate::Current();
   EnsureInitializedForIsolate(isolate, "v8::ArrayBuffer::New(void*, size_t)");
   LOG_API(isolate, "v8::ArrayBuffer::New(void*, size_t)");
   ENTER_V8(isolate);
   i::Handle<i::JSArrayBuffer> obj =
       isolate->factory()->NewJSArrayBuffer();
-  i::Runtime::SetupArrayBuffer(isolate, obj, data, byte_length);
+  i::Runtime::SetupArrayBuffer(isolate, obj, true, data, byte_length);
   return Utils::ToLocal(obj);
 }
 
 
 Local<ArrayBuffer> v8::TypedArray::Buffer() {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   if (IsDeadCheck(isolate, "v8::TypedArray::Buffer()"))
     return Local<ArrayBuffer>();
   i::Handle<i::JSTypedArray> obj = Utils::OpenHandle(this);
   ASSERT(obj->buffer()->IsJSArrayBuffer());
@@ skipping 1806 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