public static PdhCounter AddCounter(this PdhQueryHandle query, string category, string counter, string instance, bool throwOnError)
{
var path = instance == null
? CounterPathFactory.Create(category, counter)
: CounterPathFactory.Create(category, counter, instance);
var status = PdhExports.PdhAddEnglishCounter(query, path, IntPtr.Zero, out var pdhCounter);
if (status == PdhStatus.PDH_CSTATUS_VALID_DATA)
{
return(pdhCounter);
}
if (!throwOnError)
{
return(default);
protected override bool ReleaseHandle() => PdhExports.PdhCloseQuery(handle) == PdhStatus.PDH_CSTATUS_VALID_DATA;
public static PdhQueryHandle OpenRealtime()
{
PdhExports.PdhOpenQuery(null, IntPtr.Zero, out var handle).EnsureSuccess(nameof(PdhExports.PdhOpenQuery));
return(handle);
}
public static PdhStatus CollectQueryData(this PdhQueryHandle query) => PdhExports.PdhCollectQueryData(query);