device/hid/hid_connection_win.h

// Copyright (c) 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef DEVICE_HID_HID_CONNECTION_WIN_H_
#define DEVICE_HID_HID_CONNECTION_WIN_H_

#include <windows.h>

#include <set>

#include "base/win/scoped_handle.h"
#include "device/hid/hid_connection.h"

namespace device {

struct PendingHidTransfer;

class HidConnectionWin : public HidConnection {
 public:
  explicit HidConnectionWin(const HidDeviceInfo& device_info);

  // HidConnection implementation.
  virtual void PlatformRead(scoped_refptr<net::IOBufferWithSize> buffer,
                            const IOCallback& callback) OVERRIDE;
  virtual void PlatformWrite(uint8_t report_id,
                             scoped_refptr<net::IOBufferWithSize> buffer,
                             const IOCallback& callback) OVERRIDE;
  virtual void PlatformGetFeatureReport(
      uint8_t report_id,
      scoped_refptr<net::IOBufferWithSize> buffer,
      const IOCallback& callback) OVERRIDE;
  virtual void PlatformSendFeatureReport(
      uint8_t report_id,
      scoped_refptr<net::IOBufferWithSize> buffer,
      const IOCallback& callback) OVERRIDE;

 private:
  friend class HidServiceWin;
  friend struct PendingHidTransfer;

  ~HidConnectionWin();

  bool available() const { return file_.IsValid(); }

  void OnTransferFinished(scoped_refptr<PendingHidTransfer> transfer);
  void OnTransferCanceled(scoped_refptr<PendingHidTransfer> transfer);

  base::win::ScopedHandle file_;

  std::set<scoped_refptr<PendingHidTransfer> > transfers_;

  DISALLOW_COPY_AND_ASSIGN(HidConnectionWin);
};

}  // namespace device

#endif  // DEVICE_HID_HID_CONNECTION_WIN_H_