public static void Close()
{
if (driver == null)
{
return;
}
uint refCount = 0;
driver.DeviceIOControl(IOCTL_OLS_GET_REFCOUNT, null, ref refCount);
driver.Close();
if (refCount <= 1)
{
driver.Delete();
}
driver = null;
if (isaBusMutex != null)
{
isaBusMutex.Close();
isaBusMutex = null;
}
if (pciBusMutex != null)
{
pciBusMutex.Close();
pciBusMutex = null;
}
// try to delete temporary driver file again if failed during open
if (fileName != null && File.Exists(fileName))
{
try {
File.Delete(fileName);
fileName = null;
} catch (IOException) { }
catch (UnauthorizedAccessException) { }
}
}
