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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 |
11 // to be able to do and finish all async operations even when FileStream | 11 // to be able to do and finish all async operations even when FileStream |
12 // instance is deleted. So FileStream's destructor can schedule file | 12 // instance is deleted. So FileStream's destructor can schedule file |
13 // closing to be done by Context in WorkerPool (or the TaskRunner passed to | 13 // closing to be done by Context in WorkerPool (or the TaskRunner passed to |
14 // constructor) and then just return (releasing Context pointer from | 14 // constructor) and then just return (releasing Context pointer from |
15 // scoped_ptr) without waiting for actual closing to complete. | 15 // scoped_ptr) without waiting for actual closing to complete. |
16 // Implementation of FileStream::Context is divided in two parts: some methods | 16 // Implementation of FileStream::Context is divided in two parts: some methods |
17 // and members are platform-independent and some depend on the platform. This | 17 // and members are platform-independent and some depend on the platform. This |
18 // header file contains the complete definition of Context class including all | 18 // header file contains the complete definition of Context class including all |
19 // platform-dependent parts (because of that it has a lot of #if-#else | 19 // platform-dependent parts (because of that it has a lot of #if-#else |
20 // branching). Implementations of all platform-independent methods are | 20 // branching). Implementations of all platform-independent methods are |
21 // located in file_stream_context.cc, and all platform-dependent methods are | 21 // located in file_stream_context.cc, and all platform-dependent methods are |
22 // in file_stream_context_{win,posix}.cc. This separation provides better | 22 // in file_stream_context_{win,posix}.cc. This separation provides better |
23 // readability of Context's code. And we tried to make as much Context code | 23 // readability of Context's code. And we tried to make as much Context code |
24 // platform-independent as possible. So file_stream_context_{win,posix}.cc are | 24 // platform-independent as possible. So file_stream_context_{win,posix}.cc are |
25 // much smaller than file_stream_context.cc now. | 25 // much smaller than file_stream_context.cc now. |
26 | 26 |
27 #ifndef NET_BASE_FILE_STREAM_CONTEXT_H_ | 27 #ifndef NET_BASE_FILE_STREAM_CONTEXT_H_ |
28 #define NET_BASE_FILE_STREAM_CONTEXT_H_ | 28 #define NET_BASE_FILE_STREAM_CONTEXT_H_ |
29 | 29 |
| 30 #include <stdint.h> |
| 31 |
30 #include "base/files/file.h" | 32 #include "base/files/file.h" |
| 33 #include "base/macros.h" |
31 #include "base/memory/weak_ptr.h" | 34 #include "base/memory/weak_ptr.h" |
32 #include "base/message_loop/message_loop.h" | 35 #include "base/message_loop/message_loop.h" |
33 #include "base/move.h" | 36 #include "base/move.h" |
34 #include "base/single_thread_task_runner.h" | 37 #include "base/single_thread_task_runner.h" |
35 #include "base/task_runner.h" | 38 #include "base/task_runner.h" |
36 #include "net/base/completion_callback.h" | 39 #include "net/base/completion_callback.h" |
37 #include "net/base/file_stream.h" | 40 #include "net/base/file_stream.h" |
38 | 41 |
39 #if defined(OS_POSIX) | 42 #if defined(OS_POSIX) |
40 #include <errno.h> | 43 #include <errno.h> |
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233 // Tracks the result of the IO completion operation. Set in OnIOComplete. | 236 // Tracks the result of the IO completion operation. Set in OnIOComplete. |
234 int result_; | 237 int result_; |
235 #endif | 238 #endif |
236 | 239 |
237 DISALLOW_COPY_AND_ASSIGN(Context); | 240 DISALLOW_COPY_AND_ASSIGN(Context); |
238 }; | 241 }; |
239 | 242 |
240 } // namespace net | 243 } // namespace net |
241 | 244 |
242 #endif // NET_BASE_FILE_STREAM_CONTEXT_H_ | 245 #endif // NET_BASE_FILE_STREAM_CONTEXT_H_ |
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