public static void Close()
{
if (driver != null)
{
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;
}
// 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) { }
}
}
private static bool rdmsrWindows(uint index, out ulong value, ulong threadAffinityMask = 0)
{
value = 0;
if (driver == null)
{
return(false);
}
// Force current thread to run on the requested CPU core
// This probably works because the kernel processes short running requests on
// the CPU thread where they originated from to improve efficiency. While this
// is probably a likely hack, changing this behavior would require significant
// changes to the kernel driver.
ulong mask = 0xFFFFFFFFFFFFFFFF;
if (threadAffinityMask != 0)
{
mask = ThreadAffinity.Set(threadAffinityMask);
}
try {
// Communicate with WinRing0 driver
return(driver.DeviceIOControl(IOCTL_OLS_READ_MSR, index, ref value));
} finally {
if (threadAffinityMask != 0)
{
ThreadAffinity.Set(mask);
}
}
}
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;
isaBusMutex.Close();
}