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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include <stdlib.h> | 5 #include <stdlib.h> |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
8 #include "gin/array_buffer.h" | 8 #include "gin/array_buffer.h" |
9 #include "gin/per_isolate_data.h" | 9 #include "gin/per_isolate_data.h" |
10 | 10 |
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55 // drop V8's implied reference to the memory. | 55 // drop V8's implied reference to the memory. |
56 // | 56 // |
57 // The final subtlety is that we need every ArrayBuffer into the same array | 57 // The final subtlety is that we need every ArrayBuffer into the same array |
58 // buffer to AddRef the same ArrayBuffer::Private. To make that work, we store | 58 // buffer to AddRef the same ArrayBuffer::Private. To make that work, we store |
59 // a pointer to the ArrayBuffer::Private object in an internal field of the | 59 // a pointer to the ArrayBuffer::Private object in an internal field of the |
60 // ArrayBuffer object. | 60 // ArrayBuffer object. |
61 // | 61 // |
62 class ArrayBuffer::Private : public base::RefCounted<ArrayBuffer::Private> { | 62 class ArrayBuffer::Private : public base::RefCounted<ArrayBuffer::Private> { |
63 public: | 63 public: |
64 static scoped_refptr<Private> From(v8::Isolate* isolate, | 64 static scoped_refptr<Private> From(v8::Isolate* isolate, |
65 v8::Handle<v8::ArrayBuffer> array); | 65 v8::Local<v8::ArrayBuffer> array); |
66 | 66 |
67 void* buffer() const { return buffer_; } | 67 void* buffer() const { return buffer_; } |
68 size_t length() const { return length_; } | 68 size_t length() const { return length_; } |
69 | 69 |
70 private: | 70 private: |
71 friend class base::RefCounted<Private>; | 71 friend class base::RefCounted<Private>; |
72 | 72 |
73 Private(v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> array); | 73 Private(v8::Isolate* isolate, v8::Local<v8::ArrayBuffer> array); |
74 ~Private(); | 74 ~Private(); |
75 | 75 |
76 static void FirstWeakCallback(const v8::WeakCallbackInfo<Private>& data); | 76 static void FirstWeakCallback(const v8::WeakCallbackInfo<Private>& data); |
77 static void SecondWeakCallback(const v8::WeakCallbackInfo<Private>& data); | 77 static void SecondWeakCallback(const v8::WeakCallbackInfo<Private>& data); |
78 | 78 |
79 v8::Global<v8::ArrayBuffer> array_buffer_; | 79 v8::Global<v8::ArrayBuffer> array_buffer_; |
80 scoped_refptr<Private> self_reference_; | 80 scoped_refptr<Private> self_reference_; |
81 v8::Isolate* isolate_; | 81 v8::Isolate* isolate_; |
82 void* buffer_; | 82 void* buffer_; |
83 size_t length_; | 83 size_t length_; |
84 }; | 84 }; |
85 | 85 |
86 scoped_refptr<ArrayBuffer::Private> ArrayBuffer::Private::From( | 86 scoped_refptr<ArrayBuffer::Private> ArrayBuffer::Private::From( |
87 v8::Isolate* isolate, v8::Handle<v8::ArrayBuffer> array) { | 87 v8::Isolate* isolate, v8::Local<v8::ArrayBuffer> array) { |
88 if (array->IsExternal()) { | 88 if (array->IsExternal()) { |
89 CHECK_EQ(WrapperInfo::From(v8::Handle<v8::Object>::Cast(array)), | 89 CHECK_EQ(WrapperInfo::From(v8::Local<v8::Object>::Cast(array)), |
90 &g_array_buffer_wrapper_info) | 90 &g_array_buffer_wrapper_info) |
91 << "Cannot mix blink and gin ArrayBuffers"; | 91 << "Cannot mix blink and gin ArrayBuffers"; |
92 return make_scoped_refptr(static_cast<Private*>( | 92 return make_scoped_refptr(static_cast<Private*>( |
93 array->GetAlignedPointerFromInternalField(kEncodedValueIndex))); | 93 array->GetAlignedPointerFromInternalField(kEncodedValueIndex))); |
94 } | 94 } |
95 return make_scoped_refptr(new Private(isolate, array)); | 95 return make_scoped_refptr(new Private(isolate, array)); |
96 } | 96 } |
97 | 97 |
98 ArrayBuffer::Private::Private(v8::Isolate* isolate, | 98 ArrayBuffer::Private::Private(v8::Isolate* isolate, |
99 v8::Handle<v8::ArrayBuffer> array) | 99 v8::Local<v8::ArrayBuffer> array) |
100 : array_buffer_(isolate, array), isolate_(isolate) { | 100 : array_buffer_(isolate, array), isolate_(isolate) { |
101 // Take ownership of the array buffer. | 101 // Take ownership of the array buffer. |
102 CHECK(!array->IsExternal()); | 102 CHECK(!array->IsExternal()); |
103 v8::ArrayBuffer::Contents contents = array->Externalize(); | 103 v8::ArrayBuffer::Contents contents = array->Externalize(); |
104 buffer_ = contents.Data(); | 104 buffer_ = contents.Data(); |
105 length_ = contents.ByteLength(); | 105 length_ = contents.ByteLength(); |
106 | 106 |
107 array->SetAlignedPointerInInternalField(kWrapperInfoIndex, | 107 array->SetAlignedPointerInInternalField(kWrapperInfoIndex, |
108 &g_array_buffer_wrapper_info); | 108 &g_array_buffer_wrapper_info); |
109 array->SetAlignedPointerInInternalField(kEncodedValueIndex, this); | 109 array->SetAlignedPointerInInternalField(kEncodedValueIndex, this); |
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131 } | 131 } |
132 | 132 |
133 // ArrayBuffer ---------------------------------------------------------------- | 133 // ArrayBuffer ---------------------------------------------------------------- |
134 | 134 |
135 ArrayBuffer::ArrayBuffer() | 135 ArrayBuffer::ArrayBuffer() |
136 : bytes_(0), | 136 : bytes_(0), |
137 num_bytes_(0) { | 137 num_bytes_(0) { |
138 } | 138 } |
139 | 139 |
140 ArrayBuffer::ArrayBuffer(v8::Isolate* isolate, | 140 ArrayBuffer::ArrayBuffer(v8::Isolate* isolate, |
141 v8::Handle<v8::ArrayBuffer> array) { | 141 v8::Local<v8::ArrayBuffer> array) { |
142 private_ = ArrayBuffer::Private::From(isolate, array); | 142 private_ = ArrayBuffer::Private::From(isolate, array); |
143 bytes_ = private_->buffer(); | 143 bytes_ = private_->buffer(); |
144 num_bytes_ = private_->length(); | 144 num_bytes_ = private_->length(); |
145 } | 145 } |
146 | 146 |
147 ArrayBuffer::~ArrayBuffer() { | 147 ArrayBuffer::~ArrayBuffer() { |
148 } | 148 } |
149 | 149 |
150 ArrayBuffer& ArrayBuffer::operator=(const ArrayBuffer& other) { | 150 ArrayBuffer& ArrayBuffer::operator=(const ArrayBuffer& other) { |
151 private_ = other.private_; | 151 private_ = other.private_; |
152 bytes_ = other.bytes_; | 152 bytes_ = other.bytes_; |
153 num_bytes_ = other.num_bytes_; | 153 num_bytes_ = other.num_bytes_; |
154 return *this; | 154 return *this; |
155 } | 155 } |
156 | 156 |
157 // Converter<ArrayBuffer> ----------------------------------------------------- | 157 // Converter<ArrayBuffer> ----------------------------------------------------- |
158 | 158 |
159 bool Converter<ArrayBuffer>::FromV8(v8::Isolate* isolate, | 159 bool Converter<ArrayBuffer>::FromV8(v8::Isolate* isolate, |
160 v8::Handle<v8::Value> val, | 160 v8::Local<v8::Value> val, |
161 ArrayBuffer* out) { | 161 ArrayBuffer* out) { |
162 if (!val->IsArrayBuffer()) | 162 if (!val->IsArrayBuffer()) |
163 return false; | 163 return false; |
164 *out = ArrayBuffer(isolate, v8::Handle<v8::ArrayBuffer>::Cast(val)); | 164 *out = ArrayBuffer(isolate, v8::Local<v8::ArrayBuffer>::Cast(val)); |
165 return true; | 165 return true; |
166 } | 166 } |
167 | 167 |
168 // ArrayBufferView ------------------------------------------------------------ | 168 // ArrayBufferView ------------------------------------------------------------ |
169 | 169 |
170 ArrayBufferView::ArrayBufferView() | 170 ArrayBufferView::ArrayBufferView() |
171 : offset_(0), | 171 : offset_(0), |
172 num_bytes_(0) { | 172 num_bytes_(0) { |
173 } | 173 } |
174 | 174 |
175 ArrayBufferView::ArrayBufferView(v8::Isolate* isolate, | 175 ArrayBufferView::ArrayBufferView(v8::Isolate* isolate, |
176 v8::Handle<v8::ArrayBufferView> view) | 176 v8::Local<v8::ArrayBufferView> view) |
177 : array_buffer_(isolate, view->Buffer()), | 177 : array_buffer_(isolate, view->Buffer()), |
178 offset_(view->ByteOffset()), | 178 offset_(view->ByteOffset()), |
179 num_bytes_(view->ByteLength()) { | 179 num_bytes_(view->ByteLength()) { |
180 } | 180 } |
181 | 181 |
182 ArrayBufferView::~ArrayBufferView() { | 182 ArrayBufferView::~ArrayBufferView() { |
183 } | 183 } |
184 | 184 |
185 ArrayBufferView& ArrayBufferView::operator=(const ArrayBufferView& other) { | 185 ArrayBufferView& ArrayBufferView::operator=(const ArrayBufferView& other) { |
186 array_buffer_ = other.array_buffer_; | 186 array_buffer_ = other.array_buffer_; |
187 offset_ = other.offset_; | 187 offset_ = other.offset_; |
188 num_bytes_ = other.num_bytes_; | 188 num_bytes_ = other.num_bytes_; |
189 return *this; | 189 return *this; |
190 } | 190 } |
191 | 191 |
192 | 192 |
193 // Converter<ArrayBufferView> ------------------------------------------------- | 193 // Converter<ArrayBufferView> ------------------------------------------------- |
194 | 194 |
195 bool Converter<ArrayBufferView>::FromV8(v8::Isolate* isolate, | 195 bool Converter<ArrayBufferView>::FromV8(v8::Isolate* isolate, |
196 v8::Handle<v8::Value> val, | 196 v8::Local<v8::Value> val, |
197 ArrayBufferView* out) { | 197 ArrayBufferView* out) { |
198 if (!val->IsArrayBufferView()) | 198 if (!val->IsArrayBufferView()) |
199 return false; | 199 return false; |
200 *out = ArrayBufferView(isolate, v8::Handle<v8::ArrayBufferView>::Cast(val)); | 200 *out = ArrayBufferView(isolate, v8::Local<v8::ArrayBufferView>::Cast(val)); |
201 return true; | 201 return true; |
202 } | 202 } |
203 | 203 |
204 } // namespace gin | 204 } // namespace gin |
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