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_SERIAL_IO_HANDLER_WIN_H_
6 #define DEVICE_SERIAL_SERIAL_IO_HANDLER_WIN_H_
8 #include "base/memory/scoped_ptr.h"
9 #include "base/message_loop/message_loop.h"
10 #include "device/serial/serial_io_handler.h"
14 class SerialIoHandlerWin : public SerialIoHandler,
15 public base::MessageLoopForIO::IOHandler {
17 // SerialIoHandler implementation.
18 virtual void ReadImpl() OVERRIDE;
19 virtual void WriteImpl() OVERRIDE;
20 virtual void CancelReadImpl() OVERRIDE;
21 virtual void CancelWriteImpl() OVERRIDE;
22 virtual bool Flush() const OVERRIDE;
23 virtual serial::DeviceControlSignalsPtr GetControlSignals() const OVERRIDE;
24 virtual bool SetControlSignals(
25 const serial::HostControlSignals& control_signals) OVERRIDE;
26 virtual bool ConfigurePort(const serial::ConnectionOptions& options) OVERRIDE;
27 virtual serial::ConnectionInfoPtr GetPortInfo() const OVERRIDE;
28 virtual bool PostOpen() OVERRIDE;
31 friend class SerialIoHandler;
33 explicit SerialIoHandlerWin(
34 scoped_refptr<base::MessageLoopProxy> file_thread_message_loop);
35 virtual ~SerialIoHandlerWin();
37 // base::MessageLoopForIO::IOHandler implementation.
38 virtual void OnIOCompleted(base::MessageLoopForIO::IOContext* context,
39 DWORD bytes_transfered,
40 DWORD error) OVERRIDE;
42 // Context used for asynchronous WaitCommEvent calls.
43 scoped_ptr<base::MessageLoopForIO::IOContext> comm_context_;
45 // Context used for overlapped reads.
46 scoped_ptr<base::MessageLoopForIO::IOContext> read_context_;
48 // Context used for overlapped writes.
49 scoped_ptr<base::MessageLoopForIO::IOContext> write_context_;
51 // Asynchronous event mask state
54 // Indicates if a pending read is waiting on initial data arrival via
55 // WaitCommEvent, as opposed to waiting on actual ReadFile completion
56 // after a corresponding WaitCommEvent has completed.
57 bool is_comm_pending_;
59 DISALLOW_COPY_AND_ASSIGN(SerialIoHandlerWin);
64 #endif // DEVICE_SERIAL_SERIAL_IO_HANDLER_WIN_H_