Fast copy between TypedData and ExternalTypedData

runtime/vm/raw_object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 154 matching lines @@
 };
 
 enum {
   kSmiTag = 0,
   kHeapObjectTag = 1,
   kSmiTagSize = 1,
   kSmiTagMask = 1,
   kSmiTagShift = 1,
 };
 
+enum TypeDataElementType {
+#define V(name) k##name##Element,
+CLASS_LIST_TYPED_DATA(V)
+#undef V
+};
+
 #define SNAPSHOT_WRITER_SUPPORT()                                              \
   void WriteTo(                                                                \
       SnapshotWriter* writer, intptr_t object_id, Snapshot::Kind kind);        \
   friend class SnapshotWriter;                                                 \
 
 #define VISITOR_SUPPORT(object)                                                \
   static intptr_t Visit##object##Pointers(Raw##object* raw_obj,                \
                                           ObjectPointerVisitor* visitor);
 
 #define HEAP_PROFILER_SUPPORT()                                                \
@@ skipping 1483 matching lines @@
   // Make sure this is updated when new TypedData types are added.
   ASSERT(kTypedDataInt8ArrayViewCid == kTypedDataInt8ArrayCid + 12);
   ASSERT(kExternalTypedDataInt8ArrayCid == kTypedDataInt8ArrayViewCid + 13);
   ASSERT(kNullCid == kExternalTypedDataInt8ArrayCid + 12);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_