Revert of Implement SharedArrayBuffer

include/v8.h

 // 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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 1902 matching lines @@
    * This is an experimental feature.
    */
   bool IsFloat64Array() const;
 
   /**
    * Returns true if this value is a DataView.
    * This is an experimental feature.
    */
   bool IsDataView() const;
 
-  /**
-   * Returns true if this value is a SharedArrayBuffer.
-   * This is an experimental feature.
-   */
-  bool IsSharedArrayBuffer() const;
-
-
   V8_WARN_UNUSED_RESULT MaybeLocal<Boolean> ToBoolean(
       Local<Context> context) const;
   V8_WARN_UNUSED_RESULT MaybeLocal<Number> ToNumber(
       Local<Context> context) const;
   V8_WARN_UNUSED_RESULT MaybeLocal<String> ToString(
       Local<Context> context) const;
   V8_WARN_UNUSED_RESULT MaybeLocal<String> ToDetailString(
       Local<Context> context) const;
   V8_WARN_UNUSED_RESULT MaybeLocal<Object> ToObject(
       Local<Context> context) const;
@@ skipping 1404 matching lines @@
    * Create a new ArrayBuffer over an existing memory block.
    * The created array buffer is by default immediately in externalized state.
    * The memory block will not be reclaimed when a created ArrayBuffer
    * is garbage-collected.
    */
   static Local<ArrayBuffer> New(
       Isolate* isolate, void* data, size_t byte_length,
       ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized);
 
   /**
-   * Returns true if ArrayBuffer is externalized, that is, does not
+   * Returns true if ArrayBuffer is extrenalized, that is, does not
    * own its memory block.
    */
   bool IsExternal() const;
 
   /**
    * Returns true if this ArrayBuffer may be neutered.
    */
   bool IsNeuterable() const;
 
   /**
@@ skipping 264 matching lines @@
  public:
   static Local<DataView> New(Handle<ArrayBuffer> array_buffer,
                              size_t byte_offset, size_t length);
   V8_INLINE static DataView* Cast(Value* obj);
 
  private:
   DataView();
   static void CheckCast(Value* obj);
 };
 
-
-/**
- * An instance of the built-in SharedArrayBuffer constructor.
- * This API is experimental and may change significantly.
- */
-class V8_EXPORT SharedArrayBuffer : public Object {
- public:
-  /**
-   * The contents of an |SharedArrayBuffer|. Externalization of
-   * |SharedArrayBuffer| returns an instance of this class, populated, with a
-   * pointer to data and byte length.
-   *
-   * The Data pointer of SharedArrayBuffer::Contents is always allocated with
-   * |ArrayBuffer::Allocator::Allocate| by the allocator specified in
-   * v8::Isolate::CreateParams::array_buffer_allocator.
-   *
-   * This API is experimental and may change significantly.
-   */
-  class V8_EXPORT Contents {  // NOLINT
-   public:
-    Contents() : data_(NULL), byte_length_(0) {}
-
-    void* Data() const { return data_; }
-    size_t ByteLength() const { return byte_length_; }
-
-   private:
-    void* data_;
-    size_t byte_length_;
-
-    friend class SharedArrayBuffer;
-  };
-
-
-  /**
-   * Data length in bytes.
-   */
-  size_t ByteLength() const;
-
-  /**
-   * Create a new SharedArrayBuffer. Allocate |byte_length| bytes.
-   * Allocated memory will be owned by a created SharedArrayBuffer and
-   * will be deallocated when it is garbage-collected,
-   * unless the object is externalized.
-   */
-  static Local<SharedArrayBuffer> New(Isolate* isolate, size_t byte_length);
-
-  /**
-   * Create a new SharedArrayBuffer over an existing memory block.  The created
-   * array buffer is immediately in externalized state unless otherwise
-   * specified. The memory block will not be reclaimed when a created
-   * SharedArrayBuffer is garbage-collected.
-   */
-  static Local<SharedArrayBuffer> New(
-      Isolate* isolate, void* data, size_t byte_length,
-      ArrayBufferCreationMode mode = ArrayBufferCreationMode::kExternalized);
-
-  /**
-   * Returns true if SharedArrayBuffer is externalized, that is, does not
-   * own its memory block.
-   */
-  bool IsExternal() const;
-
-  /**
-   * Make this SharedArrayBuffer external. The pointer to underlying memory
-   * block and byte length are returned as |Contents| structure. After
-   * SharedArrayBuffer had been etxrenalized, it does no longer owns the memory
-   * block. The caller should take steps to free memory when it is no longer
-   * needed.
-   *
-   * The memory block is guaranteed to be allocated with |Allocator::Allocate|
-   * by the allocator specified in
-   * v8::Isolate::CreateParams::array_buffer_allocator.
-   *
-   */
-  Contents Externalize();
-
-  /**
-   * Get a pointer to the ArrayBuffer's underlying memory block without
-   * externalizing it. If the ArrayBuffer is not externalized, this pointer
-   * will become invalid as soon as the ArrayBuffer became garbage collected.
-   *
-   * The embedder should make sure to hold a strong reference to the
-   * ArrayBuffer while accessing this pointer.
-   *
-   * The memory block is guaranteed to be allocated with |Allocator::Allocate|
-   * by the allocator specified in
-   * v8::Isolate::CreateParams::array_buffer_allocator.
-   */
-  Contents GetContents();
-
-  V8_INLINE static SharedArrayBuffer* Cast(Value* obj);
-
-  static const int kInternalFieldCount = V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT;
-
- private:
-  SharedArrayBuffer();
-  static void CheckCast(Value* obj);
-};
-
 
 /**
  * An instance of the built-in Date constructor (ECMA-262, 15.9).
  */
 class V8_EXPORT Date : public Object {
  public:
   static V8_DEPRECATE_SOON("Use maybe version.",
                            Local<Value> New(Isolate* isolate, double time));
   static V8_WARN_UNUSED_RESULT MaybeLocal<Value> New(Local<Context> context,
                                                      double time);
@@ skipping 3097 matching lines @@
   static const int kHeapObjectMapOffset = 0;
   static const int kMapInstanceTypeAndBitFieldOffset =
       1 * kApiPointerSize + kApiIntSize;
   static const int kStringResourceOffset = 3 * kApiPointerSize;
 
   static const int kOddballKindOffset = 3 * kApiPointerSize;
   static const int kForeignAddressOffset = kApiPointerSize;
   static const int kJSObjectHeaderSize = 3 * kApiPointerSize;
   static const int kFixedArrayHeaderSize = 2 * kApiPointerSize;
   static const int kContextHeaderSize = 2 * kApiPointerSize;
-  static const int kContextEmbedderDataIndex = 79;
+  static const int kContextEmbedderDataIndex = 78;
   static const int kFullStringRepresentationMask = 0x07;
   static const int kStringEncodingMask = 0x4;
   static const int kExternalTwoByteRepresentationTag = 0x02;
   static const int kExternalOneByteRepresentationTag = 0x06;
 
   static const int kIsolateEmbedderDataOffset = 0 * kApiPointerSize;
   static const int kAmountOfExternalAllocatedMemoryOffset =
       4 * kApiPointerSize;
   static const int kAmountOfExternalAllocatedMemoryAtLastGlobalGCOffset =
       kAmountOfExternalAllocatedMemoryOffset + kApiInt64Size;
@@ skipping 1050 matching lines @@
 
 
 DataView* DataView::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);
 #endif
   return static_cast<DataView*>(value);
 }
 
 
-SharedArrayBuffer* SharedArrayBuffer::Cast(v8::Value* value) {
-#ifdef V8_ENABLE_CHECKS
-  CheckCast(value);
-#endif
-  return static_cast<SharedArrayBuffer*>(value);
-}
-
-
 Function* Function::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);
 #endif
   return static_cast<Function*>(value);
 }
 
 
 External* External::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
@@ skipping 285 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_