PerfProviderCollection.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / System / Diagnostics / PerformanceData / PerfProviderCollection.cs / 1305376 / PerfProviderCollection.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Diagnostics.PerformanceData { 
    using System; 
    using System.Threading;
    using System.ComponentModel; 
    using System.Collections.Generic;
    using System.Diagnostics;
    using System.Diagnostics.CodeAnalysis;
    using Microsoft.Win32; 
    using Microsoft.Win32.SafeHandles;
 
    internal sealed class PerfProvider { 
        internal Guid                   m_providerGuid;
        internal Int32                  m_counterSet; 
        internal SafePerfProviderHandle m_hProvider;

        // 
        //  
        // 
        //  
        //  
        [System.Security.SecurityCritical]
        internal PerfProvider(Guid providerGuid) { 
            m_providerGuid = providerGuid;
            uint Status    = UnsafeNativeMethods.PerfStartProvider(ref m_providerGuid, null, out m_hProvider);
            // ERROR_INVALID_PARAMETER, ERROR_OUTOFMEMORY
            if (Status != (uint) UnsafeNativeMethods.ERROR_SUCCESS) { 
                throw new Win32Exception((int) Status);
            } 
        } 
    }
 
    internal static class PerfProviderCollection {
        // Internal global PERFLIB V2 provider collection that contains a collection of PerfProvider objects.
        // Use mutex to serialize collection initialization/update.
        // 
        private static Object                           s_hiddenInternalSyncObject;
        private static List               s_providerList            = new List(); 
        private static Dictionary        s_counterSetList          = new Dictionary(); 
        private static CounterType[]                    s_counterTypes            = (CounterType[])Enum.GetValues(typeof(CounterType));
        private static CounterSetInstanceType[]         s_counterSetInstanceTypes = (CounterSetInstanceType[])Enum.GetValues(typeof(CounterSetInstanceType)); 

        private static Object s_lockObject {
            get {
                if (s_hiddenInternalSyncObject == null) { 
                    Object o = new Object();
                    Interlocked.CompareExchange(ref s_hiddenInternalSyncObject, o, null); 
                } 
                return s_hiddenInternalSyncObject;
            } 
        }

        // 
        //  
        // 
        [System.Security.SecurityCritical] 
        internal static PerfProvider QueryProvider(Guid providerGuid) { 
            // Most of the cases should be that the application contains 1 provider that supports several CounterSets;
            // that is, ContainsKey should succeed except for the first time. 
            //
            lock (s_lockObject) {
                foreach (PerfProvider ProviderEntry in s_providerList) {
                    if (ProviderEntry.m_providerGuid == providerGuid) { 
                        return ProviderEntry;
                    } 
                } 

                PerfProvider NewProvider = new PerfProvider(providerGuid); 
                s_providerList.Add(NewProvider);
                return NewProvider;
            }
        } 

        //  
        //  
        // 
        //  
        [System.Security.SecurityCritical]
        internal static void RemoveProvider(Guid providerGuid) {
            lock (s_lockObject) {
                PerfProvider MatchedProvider = null; 

                foreach (PerfProvider ProviderEntry in s_providerList) { 
                    if (ProviderEntry.m_providerGuid == providerGuid) { 
                        MatchedProvider = ProviderEntry;
                    } 
                }
                if (MatchedProvider != null) {
                    MatchedProvider.m_hProvider.Dispose();
                    s_providerList.Remove(MatchedProvider); 
                }
            } 
        } 

        [SuppressMessage("Microsoft.Usage", "CA2208:InstantiateArgumentExceptionsCorrectly")] 
        internal static void RegisterCounterSet(Guid counterSetGuid) {
            // Input counterSetGuid should not be registered yet. That is, ContainsKey() should fail most of times.
            //
            lock (s_lockObject) { 
                if (s_counterSetList.ContainsKey(counterSetGuid)) {
                    throw new ArgumentException(SR.GetString(SR.Perflib_Argument_CounterSetAlreadyRegister, counterSetGuid), "CounterSetGuid"); 
                } 
                s_counterSetList.Add(counterSetGuid, 0);
            } 
        }

        internal static void UnregisterCounterSet(Guid counterSetGuid) {
            lock (s_lockObject) { 
                s_counterSetList.Remove(counterSetGuid);
            } 
        } 

        internal static bool ValidateCounterType(CounterType inCounterType) { 
            foreach (CounterType DefinedCounterType in s_counterTypes) {
                if (DefinedCounterType == inCounterType) {
                    return true;
                } 
            }
            return false; 
        } 

        internal static bool ValidateCounterSetInstanceType(CounterSetInstanceType inCounterSetInstanceType) { 
            foreach (CounterSetInstanceType DefinedCounterSetInstanceType in s_counterSetInstanceTypes) {
                if (DefinedCounterSetInstanceType == inCounterSetInstanceType) {
                    return true;
                } 
            }
            return false; 
        } 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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PerfProviderCollection.cs source code in C# .NET

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