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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 // This file defines FileStream::Context class. | 5 // This file defines FileStream::Context class. | 
| 6 // The general design of FileStream is as follows: file_stream.h defines | 6 // The general design of FileStream is as follows: file_stream.h defines | 
| 7 // FileStream class which basically is just an "wrapper" not containing any | 7 // FileStream class which basically is just an "wrapper" not containing any | 
| 8 // specific implementation details. It re-routes all its method calls to | 8 // specific implementation details. It re-routes all its method calls to | 
| 9 // the instance of FileStream::Context (FileStream holds a scoped_ptr to | 9 // the instance of FileStream::Context (FileStream holds a scoped_ptr to | 
| 10 // FileStream::Context instance). Context was extracted into a different class | 10 // FileStream::Context instance). Context was extracted into a different class | 
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| 58   //////////////////////////////////////////////////////////////////////////// | 58   //////////////////////////////////////////////////////////////////////////// | 
| 59 | 59 | 
| 60   explicit Context(const scoped_refptr<base::TaskRunner>& task_runner); | 60   explicit Context(const scoped_refptr<base::TaskRunner>& task_runner); | 
| 61   Context(base::File file, const scoped_refptr<base::TaskRunner>& task_runner); | 61   Context(base::File file, const scoped_refptr<base::TaskRunner>& task_runner); | 
| 62 #if defined(OS_WIN) | 62 #if defined(OS_WIN) | 
| 63   virtual ~Context(); | 63   virtual ~Context(); | 
| 64 #elif defined(OS_POSIX) | 64 #elif defined(OS_POSIX) | 
| 65   ~Context(); | 65   ~Context(); | 
| 66 #endif | 66 #endif | 
| 67 | 67 | 
| 68   int Read(IOBuffer* buf, | 68   int Read(IOBuffer* buf, int buf_len, const CompletionCallback& callback); | 
| 69            int buf_len, |  | 
| 70            const CompletionCallback& callback); |  | 
| 71 | 69 | 
| 72   int Write(IOBuffer* buf, | 70   int Write(IOBuffer* buf, int buf_len, const CompletionCallback& callback); | 
| 73             int buf_len, |  | 
| 74             const CompletionCallback& callback); |  | 
| 75 | 71 | 
| 76   const base::File& file() const { return file_; } | 72   const base::File& file() const { return file_; } | 
| 77   bool async_in_progress() const { return async_in_progress_; } | 73   bool async_in_progress() const { return async_in_progress_; } | 
| 78 | 74 | 
| 79   //////////////////////////////////////////////////////////////////////////// | 75   //////////////////////////////////////////////////////////////////////////// | 
| 80   // Platform-independent methods implemented in file_stream_context.cc. | 76   // Platform-independent methods implemented in file_stream_context.cc. | 
| 81   //////////////////////////////////////////////////////////////////////////// | 77   //////////////////////////////////////////////////////////////////////////// | 
| 82 | 78 | 
| 83   // Destroys the context. It can be deleted in the method or deletion can be | 79   // Destroys the context. It can be deleted in the method or deletion can be | 
| 84   // deferred if some asynchronous operation is now in progress or if file is | 80   // deferred if some asynchronous operation is now in progress or if file is | 
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| 180   CompletionCallback callback_; | 176   CompletionCallback callback_; | 
| 181   scoped_refptr<IOBuffer> in_flight_buf_; | 177   scoped_refptr<IOBuffer> in_flight_buf_; | 
| 182 #endif | 178 #endif | 
| 183 | 179 | 
| 184   DISALLOW_COPY_AND_ASSIGN(Context); | 180   DISALLOW_COPY_AND_ASSIGN(Context); | 
| 185 }; | 181 }; | 
| 186 | 182 | 
| 187 }  // namespace net | 183 }  // namespace net | 
| 188 | 184 | 
| 189 #endif  // NET_BASE_FILE_STREAM_CONTEXT_H_ | 185 #endif  // NET_BASE_FILE_STREAM_CONTEXT_H_ | 
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