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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_RECEIVER_H_ | 5 #ifndef DEVICE_SERIAL_DATA_RECEIVER_H_ |
6 #define DEVICE_SERIAL_DATA_RECEIVER_H_ | 6 #define DEVICE_SERIAL_DATA_RECEIVER_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/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
13 #include "base/memory/weak_ptr.h" | 13 #include "base/memory/weak_ptr.h" |
14 #include "device/serial/buffer.h" | 14 #include "device/serial/buffer.h" |
15 #include "device/serial/data_stream.mojom.h" | 15 #include "device/serial/data_stream.mojom.h" |
16 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h" | 16 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h" |
17 | 17 |
18 namespace device { | 18 namespace device { |
19 | 19 |
20 // A DataReceiver receives data from a DataSource. | 20 // A DataReceiver receives data from a DataSource. |
21 class DataReceiver : public base::RefCounted<DataReceiver>, | 21 class DataReceiver : public base::RefCounted<DataReceiver>, |
22 public serial::DataSourceClient, | 22 public serial::DataSourceClient { |
23 public mojo::ErrorHandler { | |
24 public: | 23 public: |
25 typedef base::Callback<void(scoped_ptr<ReadOnlyBuffer>)> ReceiveDataCallback; | 24 typedef base::Callback<void(scoped_ptr<ReadOnlyBuffer>)> ReceiveDataCallback; |
26 typedef base::Callback<void(int32_t error)> ReceiveErrorCallback; | 25 typedef base::Callback<void(int32_t error)> ReceiveErrorCallback; |
27 | 26 |
28 // Constructs a DataReceiver to receive data from |source|, using a buffer | 27 // Constructs a DataReceiver to receive data from |source|, using a buffer |
29 // size of |buffer_size|, with connection errors reported as | 28 // size of |buffer_size|, with connection errors reported as |
30 // |fatal_error_value|. | 29 // |fatal_error_value|. |
31 DataReceiver(mojo::InterfacePtr<serial::DataSource> source, | 30 DataReceiver(mojo::InterfacePtr<serial::DataSource> source, |
32 mojo::InterfaceRequest<serial::DataSourceClient> client, | 31 mojo::InterfaceRequest<serial::DataSourceClient> client, |
33 uint32_t buffer_size, | 32 uint32_t buffer_size, |
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46 friend class base::RefCounted<DataReceiver>; | 45 friend class base::RefCounted<DataReceiver>; |
47 | 46 |
48 ~DataReceiver() override; | 47 ~DataReceiver() override; |
49 | 48 |
50 // serial::DataSourceClient overrides. | 49 // serial::DataSourceClient overrides. |
51 // Invoked by the DataSource to report errors. | 50 // Invoked by the DataSource to report errors. |
52 void OnError(int32_t error) override; | 51 void OnError(int32_t error) override; |
53 // Invoked by the DataSource transmit data. | 52 // Invoked by the DataSource transmit data. |
54 void OnData(mojo::Array<uint8_t> data) override; | 53 void OnData(mojo::Array<uint8_t> data) override; |
55 | 54 |
56 // mojo::ErrorHandler override. Calls ShutDown(). | 55 // mojo error handler |
57 void OnConnectionError() override; | 56 void OnConnectionError(); |
58 | 57 |
59 // Invoked by the PendingReceive to report that the user is done with the | 58 // Invoked by the PendingReceive to report that the user is done with the |
60 // receive buffer, having read |bytes_read| bytes from it. | 59 // receive buffer, having read |bytes_read| bytes from it. |
61 void Done(uint32_t bytes_read); | 60 void Done(uint32_t bytes_read); |
62 | 61 |
63 // The implementation of Receive(). If a |pending_error_| is ready to | 62 // The implementation of Receive(). If a |pending_error_| is ready to |
64 // dispatch, it does so. Otherwise, this attempts to read from |handle_| and | 63 // dispatch, it does so. Otherwise, this attempts to read from |handle_| and |
65 // dispatches the contents to |pending_receive_|. If |handle_| is not ready, | 64 // dispatches the contents to |pending_receive_|. If |handle_| is not ready, |
66 // |waiter_| is used to wait until it is ready. If an error occurs in reading | 65 // |waiter_| is used to wait until it is ready. If an error occurs in reading |
67 // |handle_|, ShutDown() is called. | 66 // |handle_|, ShutDown() is called. |
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89 std::queue<linked_ptr<DataFrame>> pending_data_frames_; | 88 std::queue<linked_ptr<DataFrame>> pending_data_frames_; |
90 | 89 |
91 base::WeakPtrFactory<DataReceiver> weak_factory_; | 90 base::WeakPtrFactory<DataReceiver> weak_factory_; |
92 | 91 |
93 DISALLOW_COPY_AND_ASSIGN(DataReceiver); | 92 DISALLOW_COPY_AND_ASSIGN(DataReceiver); |
94 }; | 93 }; |
95 | 94 |
96 } // namespace device | 95 } // namespace device |
97 | 96 |
98 #endif // DEVICE_SERIAL_DATA_RECEIVER_H_ | 97 #endif // DEVICE_SERIAL_DATA_RECEIVER_H_ |
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