Provide a convenience array buffer allocator

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 3469 matching lines @@
    *
    * Memory allocated through this allocator by V8 is accounted for as external
    * memory by V8. Note that V8 keeps track of the memory for all internalized
    * |ArrayBuffer|s. Responsibility for tracking external memory (using
    * Isolate::AdjustAmountOfExternalAllocatedMemory) is handed over to the
    * embedder upon externalization and taken over upon internalization (creating
    * an internalized buffer from an existing buffer).
    *
    * Note that it is unsafe to call back into V8 from any of the allocator
    * functions.
-   *
-   * This API is experimental and may change significantly.
    */
   class V8_EXPORT Allocator { // NOLINT
    public:
     virtual ~Allocator() {}
 
     /**
      * Allocate |length| bytes. Return NULL if allocation is not successful.
      * Memory should be initialized to zeroes.
      */
     virtual void* Allocate(size_t length) = 0;
 
     /**
      * Allocate |length| bytes. Return NULL if allocation is not successful.
      * Memory does not have to be initialized.
      */
     virtual void* AllocateUninitialized(size_t length) = 0;
+
     /**
      * Free the memory block of size |length|, pointed to by |data|.
      * That memory is guaranteed to be previously allocated by |Allocate|.
      */
     virtual void Free(void* data, size_t length) = 0;
+
+    /**
+     * malloc/free based convenience allocator.
+     *
+     * Caller takes ownership.
+     */
+    static Allocator* NewSimpleAllocator();

[ulan, 2016/06/28 15:15:40]

Nit: can we call it NewDefaultAllocator? The word "simple" is subjective.

   };
 
   /**
    * The contents of an |ArrayBuffer|. Externalization of |ArrayBuffer|
    * returns an instance of this class, populated, with a pointer to data
    * and byte length.
    *
    * The Data pointer of ArrayBuffer::Contents is always allocated with
    * Allocator::Allocate that is set via Isolate::CreateParams.
    *
@@ skipping 5375 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_