PerfService.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Shared / MS / Utility / PerfService.cs / 1305600 / PerfService.cs
                        

                        
                            //---------------------------------------------------------------------------- 
// 
//   Copyright (C) Microsoft Corporation.  All rights reserved.
// 
// 
// Description: Implements the Service class for perf diagnostics
//--------------------------------------------------------------------------- 
 
using System;
using System.Text; 
using System.Windows;
using System.Collections.Generic;

using Microsoft.Win32; 
using MS.Internal.PresentationCore;
using MS.Internal; 
using MS.Utility; 
using MS.Win32.PresentationCore;
using System.Reflection; 

namespace MS.Utility
{
    [FriendAccessAllowed] 
    static internal class PerfService
    { 
        // Box the long to avoid JIT 
        private static Dictionary perfElementIds = new Dictionary();
 
        ///
        /// Perfservice uses this property to uniquely identfy each element in the tree.
        /// this ID gets traced with ETW traces and gets mapped to the element in the tool
        /// value is valid only if the service is running 
        ///
        internal static long GetPerfElementID2(object element, string extraData) 
        { 
            object eltId = null;
            int hash = element.GetHashCode(); 

            lock (perfElementIds)
            {
                if (!perfElementIds.TryGetValue(hash, out eltId)) 
                {
                    eltId = SafeNativeMethods.GetNextPerfElementId(); 
                    perfElementIds.Add(hash, eltId); 

                    // If this is the first time we see this object emit some useful info about it. 
                    if (EventTrace.IsEnabled(EventTrace.Keyword.KeywordGeneral, EventTrace.Level.Verbose))
                    {
                        Type type = element.GetType();
                        Assembly asm = type.Assembly; 
                        EventTrace.EventProvider.TraceEvent(EventTrace.Event.PerfElementIDAssignment, EventTrace.Keyword.KeywordGeneral, EventTrace.Level.Verbose,
                               (long)eltId, type.FullName, extraData, GetPerfElementID2(asm, asm.FullName)); 
                    } 
                }
            } 

            return (long)eltId;
        }
 
        internal static long GetPerfElementID(object element)
        { 
            return GetPerfElementID2(element, string.Empty); 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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