Add gin, a lightweight bindings system for V8

gin/array_buffer.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GIN_ARRAY_BUFFER_H_
+#define GIN_ARRAY_BUFFER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"  // For scoped_refptr only!
+#include "v8/include/v8.h"
+
+namespace gin {
+
+class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
+ public:
+  virtual void* Allocate(size_t length) OVERRIDE;
+  virtual void* AllocateUninitialized(size_t length) OVERRIDE;
+  virtual void Free(void* data, size_t length) OVERRIDE;
+
+  static ArrayBufferAllocator* SharedInstance();
+};
+
+class BufferView {
+ public:
+  BufferView(v8::Isolate* isolate, v8::Handle<v8::ArrayBufferView> view);
+  BufferView(v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> buffer);
+  ~BufferView();
+
+  void* bytes() const { return bytes_; }
+  size_t num_bytes() const { return num_bytes_; }
+
+ private:
+  class Private;
+
+  void Initialize(v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> buffer);
+
+  scoped_refptr<Private> private_;
+  void* bytes_;
+  size_t num_bytes_;
+};
+
+}  // namespace gin
+
+#endif  // GIN_ARRAY_BUFFER_H_