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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 <stddef.h> |
| 8 |
| 7 #include <algorithm> | 9 #include <algorithm> |
| 8 | 10 |
| 9 #include "base/message_loop/message_loop.h" | 11 #include "base/message_loop/message_loop.h" |
| 10 #include "base/numerics/safe_conversions.h" | 12 #include "base/numerics/safe_conversions.h" |
| 11 #include "net/base/io_buffer.h" | 13 #include "net/base/io_buffer.h" |
| 12 #include "net/base/net_errors.h" | 14 #include "net/base/net_errors.h" |
| 13 | 15 |
| 14 using storage::FileStreamReader; | 16 using storage::FileStreamReader; |
| 15 | 17 |
| 16 namespace { | 18 namespace { |
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| 44 if (result == net::ERR_IO_PENDING) { | 46 if (result == net::ERR_IO_PENDING) { |
| 45 DCHECK(!pending_sink_buffer_.get()); | 47 DCHECK(!pending_sink_buffer_.get()); |
| 46 DCHECK(pending_read_callback_.is_null()); | 48 DCHECK(pending_read_callback_.is_null()); |
| 47 pending_sink_buffer_ = sink; | 49 pending_sink_buffer_ = sink; |
| 48 pending_read_callback_ = callback; | 50 pending_read_callback_ = callback; |
| 49 } | 51 } |
| 50 | 52 |
| 51 return result; | 53 return result; |
| 52 } | 54 } |
| 53 | 55 |
| 54 int64 ReadaheadFileStreamReader::GetLength( | 56 int64_t ReadaheadFileStreamReader::GetLength( |
| 55 const net::Int64CompletionCallback& callback) { | 57 const net::Int64CompletionCallback& callback) { |
| 56 return source_->GetLength(callback); | 58 return source_->GetLength(callback); |
| 57 } | 59 } |
| 58 | 60 |
| 59 int ReadaheadFileStreamReader::FinishReadFromCacheOrStoredError( | 61 int ReadaheadFileStreamReader::FinishReadFromCacheOrStoredError( |
| 60 net::DrainableIOBuffer* sink) { | 62 net::DrainableIOBuffer* sink) { |
| 61 // If we don't have any ready cache, return the pending read code, or | 63 // If we don't have any ready cache, return the pending read code, or |
| 62 // the stored error code. | 64 // the stored error code. |
| 63 if (buffers_.empty()) { | 65 if (buffers_.empty()) { |
| 64 if (source_.get()) { | 66 if (source_.get()) { |
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| 138 // Free the pending callback before running it, as the callback often | 140 // Free the pending callback before running it, as the callback often |
| 139 // dispatches another read. | 141 // dispatches another read. |
| 140 scoped_refptr<net::DrainableIOBuffer> sink = pending_sink_buffer_; | 142 scoped_refptr<net::DrainableIOBuffer> sink = pending_sink_buffer_; |
| 141 pending_sink_buffer_ = NULL; | 143 pending_sink_buffer_ = NULL; |
| 142 net::CompletionCallback completion_callback = pending_read_callback_; | 144 net::CompletionCallback completion_callback = pending_read_callback_; |
| 143 pending_read_callback_.Reset(); | 145 pending_read_callback_.Reset(); |
| 144 | 146 |
| 145 completion_callback.Run(FinishReadFromCacheOrStoredError(sink.get())); | 147 completion_callback.Run(FinishReadFromCacheOrStoredError(sink.get())); |
| 146 } | 148 } |
| 147 } | 149 } |
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