internal Guid GetProperty(Native.SP_DEVINFO_DATA devData, int property, Guid defaultValue)
{
if (devData == null)
{
throw new ArgumentNullException("devData");
}
int propertyRegDataType = 0;
int requiredSize;
int propertyBufferSize = Marshal.SizeOf(typeof(Guid));
IntPtr propertyBuffer = Marshal.AllocHGlobal(propertyBufferSize);
if (!Native.SetupDiGetDeviceRegistryProperty(_deviceInfoSet,
devData,
property,
out propertyRegDataType,
propertyBuffer,
propertyBufferSize,
out requiredSize))
{
Marshal.FreeHGlobal(propertyBuffer);
int error = Marshal.GetLastWin32Error();
if (error != Native.ERROR_INVALID_DATA)
{
throw new Win32Exception(error);
}
return(defaultValue);
}
Guid value = (Guid)Marshal.PtrToStructure(propertyBuffer, typeof(Guid));
Marshal.FreeHGlobal(propertyBuffer);
return(value);
}
internal Native.SP_DEVINFO_DATA GetInfo(int dnDevInst)
{
StringBuilder sb = new StringBuilder(1024);
int hr = Native.CM_Get_Device_ID(dnDevInst, sb, sb.Capacity, 0);
if (hr != 0)
{
throw new Win32Exception(hr);
}
Native.SP_DEVINFO_DATA devData = new Native.SP_DEVINFO_DATA();
devData.cbSize = Marshal.SizeOf(typeof(Native.SP_DEVINFO_DATA));
if (!Native.SetupDiOpenDeviceInfo(_deviceInfoSet, sb.ToString(), IntPtr.Zero, 0, devData))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
return(devData);
}
internal Volume(DeviceClass deviceClass, Native.SP_DEVINFO_DATA deviceInfoData, string path, int index)
: base(deviceClass, deviceInfoData, path, index)
{
}
internal override Device CreateDevice(DeviceClass deviceClass, Native.SP_DEVINFO_DATA deviceInfoData, string path, int index)
{
return(new Volume(deviceClass, deviceInfoData, path, index));
}
internal virtual Device CreateDevice(DeviceClass deviceClass, Native.SP_DEVINFO_DATA deviceInfoData, string path, int index)
{
return(new Device(deviceClass, deviceInfoData, path, index));
}
