// ReSharper disable once CodeAnnotationAnalyzer
public static T GetOrAdd <T>([NotNull] string categoryName, [CanBeNull] string categoryHelp = null)
where T : PerfCategory
{
// NOTE: Cant have Requires here as contract re-writing might change the method name and we need the name to be kept
Debug.Assert(!string.IsNullOrWhiteSpace(categoryName));
// ReSharper disable once AssignNullToNotNullAttribute
PerfCategoryType pct = _counterTypes.GetOrAdd(typeof(T), t => new PerfCategoryType(t));
Debug.Assert(pct != null);
if (pct.Exception != null)
{
throw pct.Exception;
}
// ReSharper disable once AssignNullToNotNullAttribute
return((T)_categories.GetOrAdd(categoryName, n => pct.Creator(n)));
}
public static bool Exists([NotNull] Type perfCategoryType, [NotNull] string categoryName)
{
if (perfCategoryType == null)
{
throw new ArgumentNullException("perfCategoryType");
}
if (categoryName == null)
{
throw new ArgumentNullException("categoryName");
}
// ReSharper disable once AssignNullToNotNullAttribute
PerfCategoryType pct = _counterTypes.GetOrAdd(perfCategoryType, t => new PerfCategoryType(t));
Debug.Assert(pct != null);
if (pct.Exception != null)
{
throw pct.Exception;
}
return(PerformanceCounterCategory.Exists(categoryName) &&
// ReSharper disable once PossibleNullReferenceException, AssignNullToNotNullAttribute
pct.CreationData.All(c => PerformanceCounterCategory.CounterExists(c.CounterName, categoryName)));
}
