1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef GIN_ARRAY_BUFFER_H_
6#define GIN_ARRAY_BUFFER_H_
7
8#include "base/basictypes.h"
9#include "base/compiler_specific.h"
10#include "base/memory/ref_counted.h"
11#include "gin/converter.h"
12#include "gin/gin_export.h"
13#include "v8/include/v8.h"
14
15namespace gin {
16
17class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
18 public:
19  virtual void* Allocate(size_t length) OVERRIDE;
20  virtual void* AllocateUninitialized(size_t length) OVERRIDE;
21  virtual void Free(void* data, size_t length) OVERRIDE;
22
23  static ArrayBufferAllocator* SharedInstance();
24};
25
26class GIN_EXPORT ArrayBuffer {
27 public:
28  ArrayBuffer();
29  ArrayBuffer(v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> buffer);
30  ~ArrayBuffer();
31  ArrayBuffer& operator=(const ArrayBuffer& other);
32
33  void* bytes() const { return bytes_; }
34  size_t num_bytes() const { return num_bytes_; }
35
36 private:
37  class Private;
38
39  scoped_refptr<Private> private_;
40  void* bytes_;
41  size_t num_bytes_;
42
43  DISALLOW_COPY(ArrayBuffer);
44};
45
46template<>
47struct GIN_EXPORT Converter<ArrayBuffer> {
48  static bool FromV8(v8::Isolate* isolate, v8::Handle<v8::Value> val,
49                     ArrayBuffer* out);
50};
51
52class GIN_EXPORT ArrayBufferView {
53 public:
54  ArrayBufferView();
55  ArrayBufferView(v8::Isolate* isolate, v8::Handle<v8::ArrayBufferView> view);
56  ~ArrayBufferView();
57  ArrayBufferView& operator=(const ArrayBufferView& other);
58
59  void* bytes() const {
60    return static_cast<uint8_t*>(array_buffer_.bytes()) + offset_;
61  }
62  size_t num_bytes() const { return num_bytes_; }
63
64 private:
65  ArrayBuffer array_buffer_;
66  size_t offset_;
67  size_t num_bytes_;
68
69  DISALLOW_COPY(ArrayBufferView);
70};
71
72template<>
73struct GIN_EXPORT Converter<ArrayBufferView> {
74  static bool FromV8(v8::Isolate* isolate, v8::Handle<v8::Value> val,
75                     ArrayBufferView* out);
76};
77
78}  // namespace gin
79
80#endif  // GIN_ARRAY_BUFFER_H_
81