/// <summary>
/// Removes the counter (category) from the system
/// </summary>
public static void Delete(string categoryName)
{
CheckValidCategory(categoryName);
string machineName = ".";
categoryName = categoryName.ToLowerInvariant();
Mutex mutex = null;
try
{
NetFrameworkUtils.EnterMutex(PerfMutexName, ref mutex);
if (!PerformanceCounterLib.IsCustomCategory(machineName, categoryName))
{
throw new InvalidOperationException(SR.CantDeleteCategory);
}
SharedPerformanceCounter.RemoveAllInstances(categoryName);
PerformanceCounterLib.UnregisterCategory(categoryName);
PerformanceCounterLib.CloseAllLibraries();
}
finally
{
if (mutex != null)
{
mutex.ReleaseMutex();
mutex.Close();
}
}
}
private static void LoadPerfCounterDll()
{
if (s_perfCounterDllLoaded)
{
return;
}
string installPath = NetFrameworkUtils.GetLatestBuildDllDirectory(".");
string perfcounterPath = Path.Combine(installPath, "perfcounter.dll");
if (Interop.Kernel32.LoadLibrary(perfcounterPath) == IntPtr.Zero)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
s_perfCounterDllLoaded = true;
}
public static PerformanceCounterCategory Create(string categoryName, string categoryHelp, PerformanceCounterCategoryType categoryType, CounterCreationDataCollection counterData)
{
if (categoryType < PerformanceCounterCategoryType.Unknown || categoryType > PerformanceCounterCategoryType.MultiInstance)
{
throw new ArgumentOutOfRangeException(nameof(categoryType));
}
if (counterData == null)
{
throw new ArgumentNullException(nameof(counterData));
}
CheckValidCategory(categoryName);
if (categoryHelp != null)
{
// null categoryHelp is a valid option - it gets set to "Help Not Available" later on.
CheckValidHelp(categoryHelp);
}
string machineName = ".";
Mutex mutex = null;
try
{
NetFrameworkUtils.EnterMutex(PerfMutexName, ref mutex);
if (PerformanceCounterLib.IsCustomCategory(machineName, categoryName) || PerformanceCounterLib.CategoryExists(machineName, categoryName))
{
throw new InvalidOperationException(SR.Format(SR.PerformanceCategoryExists, categoryName));
}
CheckValidCounterLayout(counterData);
PerformanceCounterLib.RegisterCategory(categoryName, categoryType, categoryHelp, counterData);
return(new PerformanceCounterCategory(categoryName, machineName));
}
finally
{
if (mutex != null)
{
mutex.ReleaseMutex();
mutex.Close();
}
}
}
