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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 #ifndef DEVICE_SERIAL_SERIAL_IO_HANDLER_POSIX_H_ | 5 #ifndef DEVICE_SERIAL_SERIAL_IO_HANDLER_POSIX_H_ |
6 #define DEVICE_SERIAL_SERIAL_IO_HANDLER_POSIX_H_ | 6 #define DEVICE_SERIAL_SERIAL_IO_HANDLER_POSIX_H_ |
7 | 7 |
8 #include "base/message_loop/message_loop.h" | 8 #include "base/message_loop/message_loop.h" |
9 #include "base/single_thread_task_runner.h" | 9 #include "base/single_thread_task_runner.h" |
10 #include "base/thread_task_runner_handle.h" | 10 #include "base/thread_task_runner_handle.h" |
11 #include "device/serial/serial_io_handler.h" | 11 #include "device/serial/serial_io_handler.h" |
12 | 12 |
13 namespace device { | 13 namespace device { |
14 | 14 |
| 15 // Linux reports breaks and parity errors by inserting the sequence '\377\0x' |
| 16 // into the byte stream where 'x' is '\0' for a break and the corrupted byte for |
| 17 // a parity error. |
| 18 enum class ErrorDetectState { NO_ERROR, MARK_377_SEEN, MARK_0_SEEN }; |
| 19 |
15 class SerialIoHandlerPosix : public SerialIoHandler, | 20 class SerialIoHandlerPosix : public SerialIoHandler, |
16 public base::MessageLoopForIO::Watcher { | 21 public base::MessageLoopForIO::Watcher { |
17 protected: | 22 protected: |
18 // SerialIoHandler impl. | 23 // SerialIoHandler impl. |
19 void ReadImpl() override; | 24 void ReadImpl() override; |
20 void WriteImpl() override; | 25 void WriteImpl() override; |
21 void CancelReadImpl() override; | 26 void CancelReadImpl() override; |
22 void CancelWriteImpl() override; | 27 void CancelWriteImpl() override; |
23 bool ConfigurePortImpl() override; | 28 bool ConfigurePortImpl() override; |
24 bool Flush() const override; | 29 bool Flush() const override; |
25 serial::DeviceControlSignalsPtr GetControlSignals() const override; | 30 serial::DeviceControlSignalsPtr GetControlSignals() const override; |
26 bool SetControlSignals( | 31 bool SetControlSignals( |
27 const serial::HostControlSignals& control_signals) override; | 32 const serial::HostControlSignals& control_signals) override; |
28 serial::ConnectionInfoPtr GetPortInfo() const override; | 33 serial::ConnectionInfoPtr GetPortInfo() const override; |
29 bool SetBreak() override; | 34 bool SetBreak() override; |
30 bool ClearBreak() override; | 35 bool ClearBreak() override; |
| 36 int CheckReceiveError(char* buffer, |
| 37 int buffer_len, |
| 38 int bytes_read, |
| 39 bool& break_detected, |
| 40 bool& parity_error_detected); |
31 | 41 |
32 private: | 42 private: |
33 friend class SerialIoHandler; | 43 friend class SerialIoHandler; |
| 44 friend class SerialIoHandlerPosixTest; |
34 | 45 |
35 SerialIoHandlerPosix( | 46 SerialIoHandlerPosix( |
36 scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner, | 47 scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner, |
37 scoped_refptr<base::SingleThreadTaskRunner> ui_thread_task_runner); | 48 scoped_refptr<base::SingleThreadTaskRunner> ui_thread_task_runner); |
38 ~SerialIoHandlerPosix() override; | 49 ~SerialIoHandlerPosix() override; |
39 | 50 |
40 // base::MessageLoopForIO::Watcher implementation. | 51 // base::MessageLoopForIO::Watcher implementation. |
41 void OnFileCanWriteWithoutBlocking(int fd) override; | 52 void OnFileCanWriteWithoutBlocking(int fd) override; |
42 void OnFileCanReadWithoutBlocking(int fd) override; | 53 void OnFileCanReadWithoutBlocking(int fd) override; |
43 | 54 |
44 void EnsureWatchingReads(); | 55 void EnsureWatchingReads(); |
45 void EnsureWatchingWrites(); | 56 void EnsureWatchingWrites(); |
46 | 57 |
47 base::MessageLoopForIO::FileDescriptorWatcher file_read_watcher_; | 58 base::MessageLoopForIO::FileDescriptorWatcher file_read_watcher_; |
48 base::MessageLoopForIO::FileDescriptorWatcher file_write_watcher_; | 59 base::MessageLoopForIO::FileDescriptorWatcher file_write_watcher_; |
49 | 60 |
50 // Flags indicating if the message loop is watching the device for IO events. | 61 // Flags indicating if the message loop is watching the device for IO events. |
51 bool is_watching_reads_; | 62 bool is_watching_reads_; |
52 bool is_watching_writes_; | 63 bool is_watching_writes_; |
53 | 64 |
| 65 ErrorDetectState error_detect_state_; |
| 66 bool parity_check_enabled_; |
| 67 char chars_ignored_[2]; |
| 68 int num_chars_ignored_; |
| 69 |
54 DISALLOW_COPY_AND_ASSIGN(SerialIoHandlerPosix); | 70 DISALLOW_COPY_AND_ASSIGN(SerialIoHandlerPosix); |
55 }; | 71 }; |
56 | 72 |
57 } // namespace device | 73 } // namespace device |
58 | 74 |
59 #endif // DEVICE_SERIAL_SERIAL_IO_HANDLER_POSIX_H_ | 75 #endif // DEVICE_SERIAL_SERIAL_IO_HANDLER_POSIX_H_ |
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