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. 4 5 #ifndef DEVICE_SERIAL_SERIAL_IO_HANDLER_WIN_H_ 6 #define DEVICE_SERIAL_SERIAL_IO_HANDLER_WIN_H_ 7 8 #include "base/memory/scoped_ptr.h" 9 #include "base/message_loop/message_loop.h" 10 #include "device/serial/serial_io_handler.h" 11 12 namespace device { 13 14 class SerialIoHandlerWin : public SerialIoHandler, 15 public base::MessageLoopForIO::IOHandler { 16 protected: 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; 29 30 private: 31 friend class SerialIoHandler; 32 33 explicit SerialIoHandlerWin( 34 scoped_refptr<base::MessageLoopProxy> file_thread_message_loop); 35 virtual ~SerialIoHandlerWin(); 36 37 // base::MessageLoopForIO::IOHandler implementation. 38 virtual void OnIOCompleted(base::MessageLoopForIO::IOContext* context, 39 DWORD bytes_transfered, 40 DWORD error) OVERRIDE; 41 42 // Context used for asynchronous WaitCommEvent calls. 43 scoped_ptr<base::MessageLoopForIO::IOContext> comm_context_; 44 45 // Context used for overlapped reads. 46 scoped_ptr<base::MessageLoopForIO::IOContext> read_context_; 47 48 // Context used for overlapped writes. 49 scoped_ptr<base::MessageLoopForIO::IOContext> write_context_; 50 51 // Asynchronous event mask state 52 DWORD event_mask_; 53 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_; 58 59 DISALLOW_COPY_AND_ASSIGN(SerialIoHandlerWin); 60 }; 61 62 } // namespace device 63 64 #endif // DEVICE_SERIAL_SERIAL_IO_HANDLER_WIN_H_ 65