private void Dispose(bool disposing)
{
if (disposing)
{
if (Counters != null)
{
Counters.Dispose();
Counters = null;
}
}
unsafe
{
if (_nativeInst != null && Interlocked.Exchange(ref _active, 0) != 0)
{
lock (_counterSet)
{
if (_counterSet._provider != null)
{
Interop.PerfCounter.PerfDeleteInstance(_counterSet._provider._hProvider, _nativeInst);
}
_nativeInst = null;
}
}
}
}
internal unsafe CounterSetInstance(CounterSet counterSetDefined, string instanceName)
{
if (counterSetDefined == null)
{
throw new ArgumentNullException(nameof(counterSetDefined));
}
if (instanceName == null)
{
throw new ArgumentNullException(nameof(instanceName));
}
if (instanceName.Length == 0)
{
throw new ArgumentException(SR.Perflib_Argument_EmptyInstanceName, nameof(instanceName));
}
_counterSet = counterSetDefined;
_instName = instanceName;
Debug.Assert(sizeof(Interop.PerfCounter.PerfCounterSetInstanceStruct) == 32);
_nativeInst = Interop.PerfCounter.PerfCreateInstance(
_counterSet._provider._hProvider, ref _counterSet._counterSet, _instName, 0);
int Status = (int)((_nativeInst != null) ? Interop.Errors.ERROR_SUCCESS : Marshal.GetLastWin32Error());
if (_nativeInst != null)
{
Counters = new CounterSetInstanceCounterDataSet(this);
}
else
{
// ERROR_INVALID_PARAMETER,
// ERROR_NOT_FOUND (cannot find installed CounterSet),
// ERROR_ALREADY_EXISTS,
// ERROR_NOT_ENOUGH_MEMORY
switch (Status)
{
case (int)Interop.Errors.ERROR_ALREADY_EXISTS:
throw new ArgumentException(SR.Format(SR.Perflib_Argument_InstanceAlreadyExists, _instName, _counterSet._counterSet), nameof(instanceName));
case (int)Interop.Errors.ERROR_NOT_FOUND:
throw new InvalidOperationException(SR.Format(SR.Perflib_InvalidOperation_CounterSetNotInstalled, _counterSet._counterSet));
case (int)Interop.Errors.ERROR_INVALID_PARAMETER:
if (_counterSet._instType == CounterSetInstanceType.Single)
{
throw new ArgumentException(SR.Format(SR.Perflib_Argument_InvalidInstance, _counterSet._counterSet), nameof(instanceName));
}
else
{
throw new Win32Exception(Status);
}
default:
throw new Win32Exception(Status);
}
}
_active = 1;
}
