Revert of Remove ExternalArray, derived types, and element kinds

src/elements.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/conversions.h"
 #include "src/elements.h"
 #include "src/messages.h"
 #include "src/objects.h"
 #include "src/utils.h"
 
 // Each concrete ElementsAccessor can handle exactly one ElementsKind,
 // several abstract ElementsAccessor classes are used to allow sharing
 // common code.
 //
 // Inheritance hierarchy:
 // - ElementsAccessorBase                        (abstract)
 //   - FastElementsAccessor                      (abstract)
 //     - FastSmiOrObjectElementsAccessor
 //       - FastPackedSmiElementsAccessor
 //       - FastHoleySmiElementsAccessor
 //       - FastPackedObjectElementsAccessor
 //       - FastHoleyObjectElementsAccessor
 //     - FastDoubleElementsAccessor
 //       - FastPackedDoubleElementsAccessor
 //       - FastHoleyDoubleElementsAccessor
 //   - TypedElementsAccessor: template, with instantiations:
+//     - ExternalInt8ElementsAccessor
+//     - ExternalUint8ElementsAccessor
+//     - ExternalInt16ElementsAccessor
+//     - ExternalUint16ElementsAccessor
+//     - ExternalInt32ElementsAccessor
+//     - ExternalUint32ElementsAccessor
+//     - ExternalFloat32ElementsAccessor
+//     - ExternalFloat64ElementsAccessor
+//     - ExternalUint8ClampedElementsAccessor
 //     - FixedUint8ElementsAccessor
 //     - FixedInt8ElementsAccessor
 //     - FixedUint16ElementsAccessor
 //     - FixedInt16ElementsAccessor
 //     - FixedUint32ElementsAccessor
 //     - FixedInt32ElementsAccessor
 //     - FixedFloat32ElementsAccessor
 //     - FixedFloat64ElementsAccessor
 //     - FixedUint8ClampedElementsAccessor
 //   - DictionaryElementsAccessor
@@ skipping 23 matching lines @@
   V(FastPackedObjectElementsAccessor, FAST_ELEMENTS, FixedArray)              \
   V(FastHoleyObjectElementsAccessor, FAST_HOLEY_ELEMENTS, FixedArray)         \
   V(FastPackedDoubleElementsAccessor, FAST_DOUBLE_ELEMENTS, FixedDoubleArray) \
   V(FastHoleyDoubleElementsAccessor, FAST_HOLEY_DOUBLE_ELEMENTS,              \
     FixedDoubleArray)                                                         \
   V(DictionaryElementsAccessor, DICTIONARY_ELEMENTS, SeededNumberDictionary)  \
   V(FastSloppyArgumentsElementsAccessor, FAST_SLOPPY_ARGUMENTS_ELEMENTS,      \
     FixedArray)                                                               \
   V(SlowSloppyArgumentsElementsAccessor, SLOW_SLOPPY_ARGUMENTS_ELEMENTS,      \
     FixedArray)                                                               \
+  V(ExternalInt8ElementsAccessor, EXTERNAL_INT8_ELEMENTS, ExternalInt8Array)  \
+  V(ExternalUint8ElementsAccessor, EXTERNAL_UINT8_ELEMENTS,                   \
+    ExternalUint8Array)                                                       \
+  V(ExternalInt16ElementsAccessor, EXTERNAL_INT16_ELEMENTS,                   \
+    ExternalInt16Array)                                                       \
+  V(ExternalUint16ElementsAccessor, EXTERNAL_UINT16_ELEMENTS,                 \
+    ExternalUint16Array)                                                      \
+  V(ExternalInt32ElementsAccessor, EXTERNAL_INT32_ELEMENTS,                   \
+    ExternalInt32Array)                                                       \
+  V(ExternalUint32ElementsAccessor, EXTERNAL_UINT32_ELEMENTS,                 \
+    ExternalUint32Array)                                                      \
+  V(ExternalFloat32ElementsAccessor, EXTERNAL_FLOAT32_ELEMENTS,               \
+    ExternalFloat32Array)                                                     \
+  V(ExternalFloat64ElementsAccessor, EXTERNAL_FLOAT64_ELEMENTS,               \
+    ExternalFloat64Array)                                                     \
+  V(ExternalUint8ClampedElementsAccessor, EXTERNAL_UINT8_CLAMPED_ELEMENTS,    \
+    ExternalUint8ClampedArray)                                                \
   V(FixedUint8ElementsAccessor, UINT8_ELEMENTS, FixedUint8Array)              \
   V(FixedInt8ElementsAccessor, INT8_ELEMENTS, FixedInt8Array)                 \
   V(FixedUint16ElementsAccessor, UINT16_ELEMENTS, FixedUint16Array)           \
   V(FixedInt16ElementsAccessor, INT16_ELEMENTS, FixedInt16Array)              \
   V(FixedUint32ElementsAccessor, UINT32_ELEMENTS, FixedUint32Array)           \
   V(FixedInt32ElementsAccessor, INT32_ELEMENTS, FixedInt32Array)              \
   V(FixedFloat32ElementsAccessor, FLOAT32_ELEMENTS, FixedFloat32Array)        \
   V(FixedFloat64ElementsAccessor, FLOAT64_ELEMENTS, FixedFloat64Array)        \
   V(FixedUint8ClampedElementsAccessor, UINT8_CLAMPED_ELEMENTS,                \
     FixedUint8ClampedArray)
@@ skipping 1102 matching lines @@
         break;
       }
       case DICTIONARY_ELEMENTS:
         CopyDictionaryToObjectElements(from, from_start, to, to_kind, to_start,
                                        copy_size);
         break;
       case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
       case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                       \
+      case EXTERNAL_##TYPE##_ELEMENTS:                                        \
       case TYPE##_ELEMENTS:                                                   \
         UNREACHABLE();
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
 };
 
 
 class FastPackedSmiElementsAccessor
@@ skipping 76 matching lines @@
         break;
       case DICTIONARY_ELEMENTS:
         CopyDictionaryToDoubleElements(from, from_start, to, to_start,
                                        copy_size);
         break;
       case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
       case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
 
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                       \
+      case EXTERNAL_##TYPE##_ELEMENTS:                                        \
       case TYPE##_ELEMENTS:                                                   \
         UNREACHABLE();
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
 };
 
 
 class FastPackedDoubleElementsAccessor
@@ skipping 70 matching lines @@
   static uint32_t GetCapacityImpl(JSObject* holder,
                                   FixedArrayBase* backing_store) {
     JSArrayBufferView* view = JSArrayBufferView::cast(holder);
     if (view->WasNeutered()) return 0;
     return backing_store->length();
   }
 };
 
 
 
+#define EXTERNAL_ELEMENTS_ACCESSOR(Type, type, TYPE, ctype, size)    \
+  typedef TypedElementsAccessor<EXTERNAL_##TYPE##_ELEMENTS>          \
+      External##Type##ElementsAccessor;
+
+TYPED_ARRAYS(EXTERNAL_ELEMENTS_ACCESSOR)
+#undef EXTERNAL_ELEMENTS_ACCESSOR
+
 #define FIXED_ELEMENTS_ACCESSOR(Type, type, TYPE, ctype, size)       \
   typedef TypedElementsAccessor<TYPE##_ELEMENTS >                    \
       Fixed##Type##ElementsAccessor;
 
 TYPED_ARRAYS(FIXED_ELEMENTS_ACCESSOR)
 #undef FIXED_ELEMENTS_ACCESSOR
 
 
 template <typename SloppyArgumentsElementsAccessorSubclass,
           typename ArgumentsAccessor, typename KindTraits>
@@ skipping 519 matching lines @@
 #define ACCESSOR_DELETE(Class, Kind, Store) delete elements_accessors_[Kind];
   ELEMENTS_LIST(ACCESSOR_DELETE)
 #undef ACCESSOR_DELETE
   elements_accessors_ = NULL;
 }
 
 
 ElementsAccessor** ElementsAccessor::elements_accessors_ = NULL;
 }  // namespace internal
 }  // namespace v8