private static string MakePath(PDH_COUNTER_PATH_ELEMENTS pathElements, bool isWildcard)
{
IntPtr sizeOfCounterPath = new IntPtr(0);
if (isWildcard)
{
pathElements.InstanceIndex = 0;
pathElements.InstanceName = "*";
pathElements.ParentInstance = null;
}
uint resultCode = Apis.PdhMakeCounterPath(ref pathElements, IntPtr.Zero, ref sizeOfCounterPath, PdhMakeCounterPathFlags.PDH_PATH_STANDARD_FORMAT);
if (resultCode == PdhResults.PDH_MORE_DATA)
{
IntPtr fullPathBufferPointer = Marshal.AllocHGlobal(sizeOfCounterPath.ToInt32() * 2);
try
{
resultCode = Apis.PdhMakeCounterPath(ref pathElements, fullPathBufferPointer, ref sizeOfCounterPath, PdhMakeCounterPathFlags.PDH_PATH_STANDARD_FORMAT);
if (resultCode == PdhResults.PDH_CSTATUS_VALID_DATA)
{
return(Marshal.PtrToStringUni(fullPathBufferPointer));
}
}
finally
{
Marshal.FreeHGlobal(fullPathBufferPointer);
}
}
throw new Exception(string.Format(CultureInfo.CurrentCulture, GetEventResources.CounterPathTranslationFailed, resultCode));
}
private void AddCounters(IEnumerable <string> validPaths)
{
uint resultCode = (uint)PdhResults.PDH_CSTATUS_VALID_DATA;
foreach (string validPath in validPaths)
{
IntPtr counterPointer;
resultCode = Apis.PdhAddCounter(this._safeQueryHandle, validPath, IntPtr.Zero, out counterPointer);
if (resultCode == PdhResults.PDH_CSTATUS_VALID_DATA)
{
CounterHandleNInstance instance = new CounterHandleNInstance()
{
CounterHandle = counterPointer, InstanceName = null
};
PDH_COUNTER_PATH_ELEMENTS pCounterPathElements = PdhHelper.ParsePath(validPath);
if (pCounterPathElements.InstanceName != null)
{
instance.InstanceName = pCounterPathElements.InstanceName.ToLower(CultureInfo.InvariantCulture);
}
if (!this._consumerPathToHandleAndInstanceMap.ContainsKey(validPath.ToLower(CultureInfo.InvariantCulture)))
{
this._consumerPathToHandleAndInstanceMap.Add(validPath.ToLower(CultureInfo.InvariantCulture), instance);
}
}
}
}
public static string TranslateLocalCounterPath(string englishPath)
{
PDH_COUNTER_PATH_ELEMENTS counterPathElements = PdhHelper.ParsePath(englishPath);
string counterName = counterPathElements.CounterName.ToLower(CultureInfo.InvariantCulture),
objectName = counterPathElements.ObjectName.ToLower(CultureInfo.InvariantCulture);
string[] counterNames = (string[])Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Perflib\009").GetValue("Counter");
int counterIndex = -1, objectIndex = -1;
for (int i = 1; i < counterNames.Length; i++)
{
string currentCounter = counterNames[i];
if (currentCounter.ToLower(CultureInfo.InvariantCulture) == counterName)
{
counterIndex = Convert.ToInt32(counterNames[i - 1], CultureInfo.InvariantCulture);
if ((counterIndex != -1) && (objectIndex != -1))
{
break;
}
continue;
}
if (currentCounter.ToLower(CultureInfo.InvariantCulture) == objectName)
{
objectIndex = Convert.ToInt32(counterNames[i - 1], CultureInfo.InvariantCulture);
}
if ((counterIndex != -1) && (objectIndex != -1))
{
break;
}
}
counterPathElements.ObjectName = PdhHelper.LookupPerfNameByIndex(counterPathElements.MachineName, (uint)objectIndex);
counterPathElements.CounterName = PdhHelper.LookupPerfNameByIndex(counterPathElements.MachineName, (uint)counterIndex);
return(PdhHelper.MakePath(counterPathElements, false));
}
private static string MakePath(PDH_COUNTER_PATH_ELEMENTS pathElements, bool isWildcard)
{
IntPtr sizeOfCounterPath = new IntPtr(0);
if (isWildcard)
{
pathElements.InstanceIndex = 0;
pathElements.InstanceName = "*";
pathElements.ParentInstance = null;
}
uint resultCode = Apis.PdhMakeCounterPath(ref pathElements, IntPtr.Zero, ref sizeOfCounterPath, PdhMakeCounterPathFlags.PDH_PATH_STANDARD_FORMAT);
if (resultCode == PdhResults.PDH_MORE_DATA)
{
IntPtr fullPathBufferPointer = Marshal.AllocHGlobal(sizeOfCounterPath.ToInt32() * 2);
try
{
resultCode = Apis.PdhMakeCounterPath(ref pathElements, fullPathBufferPointer, ref sizeOfCounterPath, PdhMakeCounterPathFlags.PDH_PATH_STANDARD_FORMAT);
if (resultCode == PdhResults.PDH_CSTATUS_VALID_DATA)
{
return Marshal.PtrToStringUni(fullPathBufferPointer);
}
}
finally
{
Marshal.FreeHGlobal(fullPathBufferPointer);
}
}
throw new Exception(string.Format(CultureInfo.CurrentCulture, GetEventResources.CounterPathTranslationFailed, resultCode));
}
public static extern uint PdhMakeCounterPath(ref PDH_COUNTER_PATH_ELEMENTS pCounterPathElements, IntPtr szFullPathBuffer, ref IntPtr pcchBufferSize, uint dwFlags);
public static extern uint PdhMakeCounterPath(ref PDH_COUNTER_PATH_ELEMENTS pCounterPathElements, IntPtr szFullPathBuffer, ref IntPtr pcchBufferSize, uint dwFlags);
