First cut at API for ES6 ArrayBuffers

include/v8.h

 // 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 1950 matching lines @@
   int GetScriptColumnNumber() const;
   Handle<Value> GetScriptId() const;
   ScriptOrigin GetScriptOrigin() const;
   V8_INLINE(static Function* Cast(Value* obj));
   static const int kLineOffsetNotFound;
 
  private:
   Function();
   static void CheckCast(Value* obj);
 };
 

[rossberg, 2013/04/25 11:00:55]

Style: add empty line

[Dmitry Lomov (no reviews), 2013/04/25 11:48:01]

Done.

+/**
+ * An instance of the built-in ArrayBuffer construnctor (ES6 draft 15.13.5).

[rossberg, 2013/04/25 11:00:55]

Add a comment that this is still "experimental".

[Dmitry Lomov (no reviews), 2013/04/25 11:48:01]

Done.

+ */
+class V8EXPORT ArrayBuffer : public Object {
+ public:
+  /**
+   * Data length in bytes.
+   */
+  size_t ByteLength() const;
+  /**
+   * Raw pointer to the array buffer data
+   */
+  void* Data() const;
+
+  /**
+   * Create a new ArrayBuffer. Allocate |byte_length| bytes.
+   * Allocated memory will be owned by a created ArrayBuffer and
+   * will be deallocated when it is garbage-collected.
+   */
+  static Local<ArrayBuffer> New(size_t byte_length);
+
+  /**
+   * Create a new ArrayBuffer over existing memory block.

[rossberg, 2013/04/25 11:00:55]

Nit: "over an existing..."

[Dmitry Lomov (no reviews), 2013/04/25 11:48:01]

Done.

+   * The memory block will not be reclaimed when a created ArrayBuffer
+   * is garbage-collected.
+   */
+  static Local<ArrayBuffer> New(void* data, size_t byte_length);
+
+  V8_INLINE(static ArrayBuffer* Cast(Value* obj));
+
+ private:
+  ArrayBuffer();
+  static void CheckCast(Value* obj);
+};
+
 
 /**
  * An instance of the built-in Date constructor (ECMA-262, 15.9).
  */
 class V8EXPORT Date : public Object {
  public:
   static Local<Value> New(double time);
 
   /**
    * A specialization of Value::NumberValue that is more efficient
@@ skipping 2440 matching lines @@
   // the implementation of v8.
   static const int kHeapObjectMapOffset = 0;
   static const int kMapInstanceTypeOffset = 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 = 55;
+  static const int kContextEmbedderDataIndex = 56;
   static const int kFullStringRepresentationMask = 0x07;
   static const int kStringEncodingMask = 0x4;
   static const int kExternalTwoByteRepresentationTag = 0x02;
   static const int kExternalAsciiRepresentationTag = 0x06;
 
   static const int kIsolateStateOffset = 0;
   static const int kIsolateEmbedderDataOffset = 1 * kApiPointerSize;
   static const int kIsolateRootsOffset = 3 * kApiPointerSize;
   static const int kUndefinedValueRootIndex = 5;
   static const int kNullValueRootIndex = 7;
@@ skipping 650 matching lines @@
   return static_cast<Object*>(value);
 }
 
 
 Array* Array::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);
 #endif
   return static_cast<Array*>(value);
 }
 

[rossberg, 2013/04/25 11:00:55]

STyle: add empty line

[Dmitry Lomov (no reviews), 2013/04/25 11:48:01]

Done.

+ArrayBuffer* ArrayBuffer::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<ArrayBuffer*>(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) {
@@ skipping 107 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_