Update the ICU's default timezone in browser/renderer
[chromium-blink-merge.git] / device / serial / data_source_sender.h
bloba8c2c634712e9a9a35e5f3ee23d95e1ee883da4d
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
3 // found in the LICENSE file.
5 #ifndef DEVICE_SERIAL_DATA_SOURCE_SENDER_H_
6 #define DEVICE_SERIAL_DATA_SOURCE_SENDER_H_
8 #include <vector>
10 #include "base/callback.h"
11 #include "base/memory/ref_counted.h"
12 #include "base/memory/weak_ptr.h"
13 #include "device/serial/buffer.h"
14 #include "device/serial/data_stream.mojom.h"
15 #include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h"
17 namespace device {
19 // A DataSourceSender is an interface between a source of data and a
20 // DataSourceClient.
21 class DataSourceSender : public base::RefCounted<DataSourceSender>,
22 public serial::DataSource,
23 public mojo::ErrorHandler {
24 public:
25 typedef base::Callback<void(scoped_ptr<WritableBuffer>)> ReadyCallback;
26 typedef base::Callback<void()> ErrorCallback;
28 // Constructs a DataSourceSender. Whenever the pipe is ready for writing, the
29 // |ready_callback| will be called with the WritableBuffer to be filled.
30 // |ready_callback| will not be called again until the previous WritableBuffer
31 // is destroyed. If a connection error occurs, |error_callback| will be
32 // called and the DataSourceSender will act as if ShutDown() had been called.
33 DataSourceSender(mojo::InterfaceRequest<serial::DataSource> source,
34 mojo::InterfacePtr<serial::DataSourceClient> client,
35 const ReadyCallback& ready_callback,
36 const ErrorCallback& error_callback);
38 // Shuts down this DataSourceSender. After shut down, |ready_callback| and
39 // |error_callback| will never be called.
40 void ShutDown();
42 private:
43 friend class base::RefCounted<DataSourceSender>;
44 class PendingSend;
46 ~DataSourceSender() override;
48 // mojo::InterfaceImpl<serial::DataSourceSender> overrides.
49 void Init(uint32_t buffer_size) override;
50 void Resume() override;
51 void ReportBytesReceived(uint32_t bytes_sent) override;
52 // Invoked in the event of a connection error. Calls DispatchFatalError().
53 void OnConnectionError() override;
55 // Gets more data to send to the DataSourceClient.
56 void GetMoreData();
58 // Invoked to pass |data| obtained in response to |ready_callback_|.
59 void Done(const std::vector<char>& data);
61 // Invoked to pass |data| and |error| obtained in response to
62 // |ready_callback_|.
63 void DoneWithError(const std::vector<char>& data, int32_t error);
65 // Dispatches |data| to the client.
66 void DoneInternal(const std::vector<char>& data);
68 // Reports a fatal error to the client and shuts down.
69 void DispatchFatalError();
71 mojo::Binding<serial::DataSource> binding_;
72 mojo::InterfacePtr<serial::DataSourceClient> client_;
74 // The callback to call when the client is ready for more data.
75 ReadyCallback ready_callback_;
77 // The callback to call if a fatal error occurs.
78 ErrorCallback error_callback_;
80 // The current pending send operation if there is one.
81 scoped_ptr<PendingSend> pending_send_;
83 // The number of bytes available for buffering in the client.
84 uint32_t available_buffer_capacity_;
86 // Whether sending is paused due to an error.
87 bool paused_;
89 // Whether we have encountered a fatal error and shut down.
90 bool shut_down_;
92 base::WeakPtrFactory<DataSourceSender> weak_factory_;
94 DISALLOW_COPY_AND_ASSIGN(DataSourceSender);
97 } // namespace device
99 #endif // DEVICE_SERIAL_DATA_SOURCE_SENDER_H_