// Copyright 2015 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_BASE_DEVICE_INFO_QUERY_WIN_H_ #define DEVICE_BASE_DEVICE_INFO_QUERY_WIN_H_ #include #include #include #include "device/base/device_base_export.h" namespace device { // Wraps HDEVINFO and SP_DEVINFO_DATA into a class that can automatically // release them. Provides interfaces that can add a device using its // device path, get device info and get device string property. class DEVICE_BASE_EXPORT DeviceInfoQueryWin { public: DeviceInfoQueryWin(); DeviceInfoQueryWin(const DeviceInfoQueryWin&) = delete; DeviceInfoQueryWin& operator=(const DeviceInfoQueryWin&) = delete; ~DeviceInfoQueryWin(); // Add a device to |device_info_list_| using its |device_path| so that // its device info can be retrieved. bool AddDevice(const std::wstring& device_path); // Get the device info and store it into |device_info_data_|, this function // should be called at most once. bool GetDeviceInfo(); // Get device string property and store it into |property_buffer|. bool GetDeviceStringProperty(const DEVPROPKEY& property, std::string* property_buffer); bool device_info_list_valid() { return device_info_list_ != INVALID_HANDLE_VALUE; } private: HDEVINFO device_info_list_ = INVALID_HANDLE_VALUE; // When device_info_data_.cbSize != 0, |device_info_data_| is valid. SP_DEVINFO_DATA device_info_data_; }; } // namespace device #endif // DEVICE_BASE_DEVICE_INFO_QUERY_WIN_H_