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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_DATA_SENDER_H_ | 5 #ifndef DEVICE_SERIAL_DATA_SENDER_H_ |
6 #define DEVICE_SERIAL_DATA_SENDER_H_ | 6 #define DEVICE_SERIAL_DATA_SENDER_H_ |
7 | 7 |
8 #include <queue> | 8 #include <queue> |
9 | 9 |
10 #include "base/callback.h" | 10 #include "base/callback.h" |
11 #include "base/memory/linked_ptr.h" | 11 #include "base/memory/linked_ptr.h" |
12 #include "base/strings/string_piece.h" | 12 #include "base/strings/string_piece.h" |
13 #include "device/serial/buffer.h" | 13 #include "device/serial/buffer.h" |
14 #include "device/serial/data_stream.mojom.h" | 14 #include "device/serial/data_stream.mojom.h" |
15 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h" | 15 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h" |
16 | 16 |
17 namespace device { | 17 namespace device { |
18 | 18 |
19 // A DataSender sends data to a DataSink. | 19 // A DataSender sends data to a DataSink. |
20 class DataSender : public mojo::ErrorHandler { | 20 class DataSender { |
21 public: | 21 public: |
22 typedef base::Callback<void(uint32_t bytes_sent)> DataSentCallback; | 22 typedef base::Callback<void(uint32_t bytes_sent)> DataSentCallback; |
23 typedef base::Callback<void(uint32_t bytes_sent, int32_t error)> | 23 typedef base::Callback<void(uint32_t bytes_sent, int32_t error)> |
24 SendErrorCallback; | 24 SendErrorCallback; |
25 typedef base::Callback<void()> CancelCallback; | 25 typedef base::Callback<void()> CancelCallback; |
26 | 26 |
27 // Constructs a DataSender to send data to |sink|, using a buffer size of | 27 // Constructs a DataSender to send data to |sink|, using a buffer size of |
28 // |buffer_size|, with connection errors reported as |fatal_error_value|. | 28 // |buffer_size|, with connection errors reported as |fatal_error_value|. |
29 DataSender(mojo::InterfacePtr<serial::DataSink> sink, | 29 DataSender(mojo::InterfacePtr<serial::DataSink> sink, |
30 uint32_t buffer_size, | 30 uint32_t buffer_size, |
31 int32_t fatal_error_value); | 31 int32_t fatal_error_value); |
32 | 32 |
33 ~DataSender() override; | 33 ~DataSender(); |
34 | 34 |
35 // Starts an asynchronous send of |data|. If the send completes successfully, | 35 // Starts an asynchronous send of |data|. If the send completes successfully, |
36 // |callback| will be called. Otherwise, |error_callback| will be called with | 36 // |callback| will be called. Otherwise, |error_callback| will be called with |
37 // the error. If there is a cancel in progress or there has been a connection | 37 // the error. If there is a cancel in progress or there has been a connection |
38 // error, this will not start a send and returns false. It is the caller's | 38 // error, this will not start a send and returns false. It is the caller's |
39 // responsibility to ensure |data| remains valid until one of |callback| and | 39 // responsibility to ensure |data| remains valid until one of |callback| and |
40 // |error_callback| is called. | 40 // |error_callback| is called. |
41 bool Send(const base::StringPiece& data, | 41 bool Send(const base::StringPiece& data, |
42 const DataSentCallback& callback, | 42 const DataSentCallback& callback, |
43 const SendErrorCallback& error_callback); | 43 const SendErrorCallback& error_callback); |
44 | 44 |
45 // Requests the cancellation of any in-progress sends. Calls to Send() will | 45 // Requests the cancellation of any in-progress sends. Calls to Send() will |
46 // fail until |callback| is called. | 46 // fail until |callback| is called. |
47 bool Cancel(int32_t error, const CancelCallback& callback); | 47 bool Cancel(int32_t error, const CancelCallback& callback); |
48 | 48 |
49 private: | 49 private: |
50 class PendingSend; | 50 class PendingSend; |
51 | 51 |
52 // Invoked when a PendingSend completes. | 52 // Invoked when a PendingSend completes. |
53 void SendComplete(); | 53 void SendComplete(); |
54 | 54 |
55 // Invoked when a PendingSend fails with |error|. | 55 // Invoked when a PendingSend fails with |error|. |
56 void SendFailed(int32_t error); | 56 void SendFailed(int32_t error); |
57 | 57 |
58 // mojo::ErrorHandler override. | 58 // mojo error handler |
59 void OnConnectionError() override; | 59 void OnConnectionError(); |
60 | 60 |
61 // Dispatches a cancel callback if one is pending. | 61 // Dispatches a cancel callback if one is pending. |
62 void RunCancelCallback(); | 62 void RunCancelCallback(); |
63 | 63 |
64 // Shuts down this DataSender and dispatches fatal errors to all pending | 64 // Shuts down this DataSender and dispatches fatal errors to all pending |
65 // operations. | 65 // operations. |
66 void ShutDown(); | 66 void ShutDown(); |
67 | 67 |
68 // The control connection to the data sink. | 68 // The control connection to the data sink. |
69 mojo::InterfacePtr<serial::DataSink> sink_; | 69 mojo::InterfacePtr<serial::DataSink> sink_; |
(...skipping 11 matching lines...) Expand all Loading... |
81 | 81 |
82 // Whether we have encountered a fatal error and shut down. | 82 // Whether we have encountered a fatal error and shut down. |
83 bool shut_down_; | 83 bool shut_down_; |
84 | 84 |
85 DISALLOW_COPY_AND_ASSIGN(DataSender); | 85 DISALLOW_COPY_AND_ASSIGN(DataSender); |
86 }; | 86 }; |
87 | 87 |
88 } // namespace device | 88 } // namespace device |
89 | 89 |
90 #endif // DEVICE_SERIAL_DATA_SENDER_H_ | 90 #endif // DEVICE_SERIAL_DATA_SENDER_H_ |
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