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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 "chrome/browser/media_galleries/fileapi/readahead_file_stream_reader.h" | 5 #include "chrome/browser/media_galleries/fileapi/readahead_file_stream_reader.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 | 8 |
9 #include "base/message_loop/message_loop.h" | 9 #include "base/message_loop/message_loop.h" |
10 #include "base/numerics/safe_conversions.h" | 10 #include "base/numerics/safe_conversions.h" |
11 #include "net/base/io_buffer.h" | 11 #include "net/base/io_buffer.h" |
12 #include "net/base/net_errors.h" | 12 #include "net/base/net_errors.h" |
13 | 13 |
14 using webkit_blob::FileStreamReader; | 14 using storage::FileStreamReader; |
15 | 15 |
16 namespace { | 16 namespace { |
17 | 17 |
18 const size_t kDesiredNumberOfBuffers = 2; // So we are always one buffer ahead. | 18 const size_t kDesiredNumberOfBuffers = 2; // So we are always one buffer ahead. |
19 const int kBufferSize = 1024*1024; // 1MB to minimize transaction costs. | 19 const int kBufferSize = 1024*1024; // 1MB to minimize transaction costs. |
20 | 20 |
21 } // namespace | 21 } // namespace |
22 | 22 |
23 ReadaheadFileStreamReader::ReadaheadFileStreamReader(FileStreamReader* source) | 23 ReadaheadFileStreamReader::ReadaheadFileStreamReader(FileStreamReader* source) |
24 : source_(source), | 24 : source_(source), |
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137 // Free the pending callback before running it, as the callback often | 137 // Free the pending callback before running it, as the callback often |
138 // dispatches another read. | 138 // dispatches another read. |
139 scoped_refptr<net::DrainableIOBuffer> sink = pending_sink_buffer_; | 139 scoped_refptr<net::DrainableIOBuffer> sink = pending_sink_buffer_; |
140 pending_sink_buffer_ = NULL; | 140 pending_sink_buffer_ = NULL; |
141 net::CompletionCallback completion_callback = pending_read_callback_; | 141 net::CompletionCallback completion_callback = pending_read_callback_; |
142 pending_read_callback_.Reset(); | 142 pending_read_callback_.Reset(); |
143 | 143 |
144 completion_callback.Run(FinishReadFromCacheOrStoredError(sink)); | 144 completion_callback.Run(FinishReadFromCacheOrStoredError(sink)); |
145 } | 145 } |
146 } | 146 } |
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