Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / PerfCounters.cs / 1305376 / PerfCounters.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * PerfCounters class */ namespace System.Web { using System.Web.Util; using System.Threading; using System.Runtime.InteropServices; internal sealed class PerfInstanceDataHandle: SafeHandle { internal PerfInstanceDataHandle() : base(IntPtr.Zero, true) { } internal IntPtr UnsafeHandle { get { return handle; } } public override bool IsInvalid { get { return handle == IntPtr.Zero; } } override protected bool ReleaseHandle() { UnsafeNativeMethods.PerfCloseAppCounters(handle); handle = IntPtr.Zero; return true; } } internal sealed class PerfCounters { private static PerfInstanceDataHandle _instance = null; private static IntPtr _global = IntPtr.Zero; private static IntPtr _stateService = IntPtr.Zero; private PerfCounters () {} internal static void Open(string appName) { Debug.Assert(appName != null); OpenCounter(appName); } internal static void OpenStateCounters() { OpenCounter(null); } // The app name should either be a valid app name or be 'null' to get the state service // counters initialized private static void OpenCounter(string appName) { try { // Don't activate perf counters if webengine.dll isn't loaded if (! HttpRuntime.IsEngineLoaded) return; // Open the global counters if (_global == IntPtr.Zero) { _global = UnsafeNativeMethods.PerfOpenGlobalCounters(); } // If appName is null, then we want the state counters if (appName == null) { if (_stateService == IntPtr.Zero) { _stateService = UnsafeNativeMethods.PerfOpenStateCounters(); } } else { if (appName != null) { _instance = UnsafeNativeMethods.PerfOpenAppCounters(appName); } } } catch (Exception e) { Debug.Trace("Perfcounters", "Exception: " + e.StackTrace); } } // Make sure webengine.dll is loaded before attempting to call into it (ASURT 98531) [System.Runtime.TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")] internal static void IncrementCounter(AppPerfCounter counter) { if (_instance != null) UnsafeNativeMethods.PerfIncrementCounter(_instance.UnsafeHandle, (int) counter); } internal static void DecrementCounter(AppPerfCounter counter) { if (_instance != null) UnsafeNativeMethods.PerfDecrementCounter(_instance.UnsafeHandle, (int) counter); } [System.Runtime.TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")] internal static void IncrementCounterEx(AppPerfCounter counter, int delta) { if (_instance != null) UnsafeNativeMethods.PerfIncrementCounterEx(_instance.UnsafeHandle, (int) counter, delta); } [System.Runtime.TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")] internal static void SetCounter(AppPerfCounter counter, int value) { if (_instance != null) UnsafeNativeMethods.PerfSetCounter(_instance.UnsafeHandle, (int) counter, value); } // It's important that this be debug only. We don't want production // code to access shared memory that another process could corrupt. #if DBG internal static int GetCounter(AppPerfCounter counter) { if (_instance != null) return UnsafeNativeMethods.PerfGetCounter(_instance.UnsafeHandle, (int) counter); else return -1; } #endif internal static int GetGlobalCounter(GlobalPerfCounter counter) { if (_global != IntPtr.Zero) return UnsafeNativeMethods.PerfGetCounter(_global, (int) counter); else return -1; } [System.Runtime.TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")] internal static void IncrementGlobalCounter(GlobalPerfCounter counter) { if (_global != IntPtr.Zero) UnsafeNativeMethods.PerfIncrementCounter(_global, (int) counter); } internal static void DecrementGlobalCounter(GlobalPerfCounter counter) { if (_global != IntPtr.Zero) UnsafeNativeMethods.PerfDecrementCounter(_global, (int) counter); } internal static void SetGlobalCounter(GlobalPerfCounter counter, int value) { if (_global != IntPtr.Zero) UnsafeNativeMethods.PerfSetCounter(_global, (int) counter, value); } internal static void IncrementStateServiceCounter(StateServicePerfCounter counter) { if (_stateService == IntPtr.Zero) return; UnsafeNativeMethods.PerfIncrementCounter(_stateService, (int) counter); switch (counter) { case StateServicePerfCounter.STATE_SERVICE_SESSIONS_TOTAL: IncrementGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_TOTAL); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_ACTIVE: IncrementGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_ACTIVE); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_TIMED_OUT: IncrementGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_TIMED_OUT); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_ABANDONED: IncrementGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_ABANDONED); break; default: break; } } internal static void DecrementStateServiceCounter(StateServicePerfCounter counter) { if (_stateService == IntPtr.Zero) return; UnsafeNativeMethods.PerfDecrementCounter(_stateService, (int) counter); switch (counter) { case StateServicePerfCounter.STATE_SERVICE_SESSIONS_TOTAL: DecrementGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_TOTAL); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_ACTIVE: DecrementGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_ACTIVE); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_TIMED_OUT: DecrementGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_TIMED_OUT); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_ABANDONED: DecrementGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_ABANDONED); break; default: break; } } internal static void SetStateServiceCounter(StateServicePerfCounter counter, int value) { if (_stateService == IntPtr.Zero) return; UnsafeNativeMethods.PerfSetCounter(_stateService, (int) counter, value); switch (counter) { case StateServicePerfCounter.STATE_SERVICE_SESSIONS_TOTAL: SetGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_TOTAL, value); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_ACTIVE: SetGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_ACTIVE, value); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_TIMED_OUT: SetGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_TIMED_OUT, value); break; case StateServicePerfCounter.STATE_SERVICE_SESSIONS_ABANDONED: SetGlobalCounter(GlobalPerfCounter.STATE_SERVER_SESSIONS_ABANDONED, value); break; default: break; } } }; } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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