public static float ComputeCounterValue(CounterSample oldSample, CounterSample newSample)
{
int counterType = (int)newSample.CounterType;
if (oldSample.SystemFrequency == 0L)
{
if ((((counterType != 0x20020400) && (counterType != 0x10000)) && ((counterType != 0) && (counterType != 0x10100))) && ((counterType != 0x100) && (counterType != 0x42030500)))
{
return(0f);
}
}
else if (oldSample.CounterType != newSample.CounterType)
{
throw new InvalidOperationException(SR.GetString("MismatchedCounterTypes"));
}
if (counterType == 0x30240500)
{
return(GetElapsedTime(oldSample, newSample));
}
Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER newPdhValue = new Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER();
Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER oldPdhValue = new Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER();
FillInValues(oldSample, newSample, oldPdhValue, newPdhValue);
LoadPerfCounterDll();
Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE pFmtValue = new Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE();
long systemFrequency = newSample.SystemFrequency;
int error = Microsoft.Win32.SafeNativeMethods.FormatFromRawValue((uint)counterType, 0x9200, ref systemFrequency, newPdhValue, oldPdhValue, pFmtValue);
switch (error)
{
case 0:
return((float)pFmtValue.data);
case -2147481640:
case -2147481642:
case -2147481643:
return(0f);
}
throw new Win32Exception(error, SR.GetString("PerfCounterPdhError", new object[] { error.ToString("x", CultureInfo.InvariantCulture) }));
}
public static float ComputeCounterValue(CounterSample oldSample, CounterSample newSample)
{
int counterType = (int) newSample.CounterType;
if (oldSample.SystemFrequency == 0L)
{
if ((((counterType != 0x20020400) && (counterType != 0x10000)) && ((counterType != 0) && (counterType != 0x10100))) && ((counterType != 0x100) && (counterType != 0x42030500)))
{
return 0f;
}
}
else if (oldSample.CounterType != newSample.CounterType)
{
throw new InvalidOperationException(SR.GetString("MismatchedCounterTypes"));
}
if (counterType == 0x30240500)
{
return GetElapsedTime(oldSample, newSample);
}
Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER newPdhValue = new Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER();
Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER oldPdhValue = new Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER();
FillInValues(oldSample, newSample, oldPdhValue, newPdhValue);
LoadPerfCounterDll();
Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE pFmtValue = new Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE();
long systemFrequency = newSample.SystemFrequency;
int error = Microsoft.Win32.SafeNativeMethods.FormatFromRawValue((uint) counterType, 0x9200, ref systemFrequency, newPdhValue, oldPdhValue, pFmtValue);
switch (error)
{
case 0:
return (float) pFmtValue.data;
case -2147481640:
case -2147481642:
case -2147481643:
return 0f;
}
throw new Win32Exception(error, SR.GetString("PerfCounterPdhError", new object[] { error.ToString("x", CultureInfo.InvariantCulture) }));
}
private static void FillInValues(CounterSample oldSample, CounterSample newSample, Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER oldPdhValue, Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER newPdhValue)
{
int counterType = (int)newSample.CounterType;
switch (counterType)
{
case 0:
case 0x100:
case 0x10000:
case 0x400500:
case 0x10100:
case 0x400400:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = 0L;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = 0L;
return;
case 0x410400:
case 0x650500:
case 0x450400:
case 0x10410400:
case 0x20610500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp;
return;
case 0x550500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp100nSec;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp100nSec;
return;
case 0x450500:
case 0x10410500:
case 0x20410500:
case 0x22410500:
case 0x21410500:
case 0x23410500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp;
switch (counterType)
{
case 0x22410500:
case 0x23410500:
newPdhValue.FirstValue *= (uint)newSample.CounterFrequency;
if (oldSample.CounterFrequency != 0L)
{
oldPdhValue.FirstValue *= (uint)oldSample.CounterFrequency;
}
break;
}
if ((counterType & 0x2000000) == 0x2000000)
{
newPdhValue.MultiCount = (int)newSample.BaseValue;
oldPdhValue.MultiCount = (int)oldSample.BaseValue;
}
return;
case 0x20020400:
case 0x20020500:
case 0x20470500:
case 0x20670500:
case 0x20c20400:
case 0x20570500:
case 0x30020400:
case 0x40020500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.BaseValue;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.BaseValue;
return;
case 0x20510500:
case 0x22510500:
case 0x21510500:
case 0x23510500:
newPdhValue.FirstValue = newSample.RawValue;
newPdhValue.SecondValue = newSample.TimeStamp100nSec;
oldPdhValue.FirstValue = oldSample.RawValue;
oldPdhValue.SecondValue = oldSample.TimeStamp100nSec;
if ((counterType & 0x2000000) == 0x2000000)
{
newPdhValue.MultiCount = (int)newSample.BaseValue;
oldPdhValue.MultiCount = (int)oldSample.BaseValue;
}
return;
}
newPdhValue.FirstValue = 0L;
newPdhValue.SecondValue = 0L;
oldPdhValue.FirstValue = 0L;
oldPdhValue.SecondValue = 0L;
}
public static extern int FormatFromRawValue(uint dwCounterType, uint dwFormat, ref long pTimeBase, Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER pRawValue1, Microsoft.Win32.NativeMethods.PDH_RAW_COUNTER pRawValue2, Microsoft.Win32.NativeMethods.PDH_FMT_COUNTERVALUE pFmtValue);