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 15 namespace gin { 16 17 class 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 GIN_EXPORT static ArrayBufferAllocator* SharedInstance(); 24 }; 25 26 class 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 bytes()33 void* bytes() const { return bytes_; } num_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 46 template<> 47 struct GIN_EXPORT Converter<ArrayBuffer> { 48 static bool FromV8(v8::Isolate* isolate, v8::Handle<v8::Value> val, 49 ArrayBuffer* out); 50 }; 51 52 class 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 72 template<> 73 struct 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