Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / System / Diagnostics / PerformanceData / CounterSetInstance.cs / 1407647 / CounterSetInstance.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Diagnostics.PerformanceData { using System; using System.Threading; using System.Runtime.InteropServices; using System.ComponentModel; using System.Diagnostics; using System.Diagnostics.CodeAnalysis; using Microsoft.Win32; ////// CounterSetInstance class maps to "Instace" in native performance counter implementation. /// [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] public sealed class CounterSetInstance : IDisposable { internal CounterSet m_counterSet; internal String m_instName; private Int32 m_active; private CounterSetInstanceCounterDataSet m_counters; unsafe internal UnsafeNativeMethods.PerfCounterSetInstanceStruct * m_nativeInst; //// [System.Security.SecurityCritical] [SuppressMessage("Microsoft.Usage", "CA2208:InstantiateArgumentExceptionsCorrectly")] internal CounterSetInstance(CounterSet counterSetDefined, String instanceName) { if (counterSetDefined == null) { throw new ArgumentNullException("counterSetDefined"); } if (instanceName == null) { throw new ArgumentNullException("InstanceName"); } if (instanceName.Length == 0) { throw new ArgumentException(SR.GetString(SR.Perflib_Argument_EmptyInstanceName), "InstanceName"); } m_counterSet = counterSetDefined; m_instName = instanceName; unsafe { m_nativeInst = UnsafeNativeMethods.PerfCreateInstance( m_counterSet.m_provider.m_hProvider, ref m_counterSet.m_counterSet, m_instName, 0); int Status = (int) ((m_nativeInst != null) ? UnsafeNativeMethods.ERROR_SUCCESS : Marshal.GetLastWin32Error()); if (m_nativeInst != null) { m_counters = new CounterSetInstanceCounterDataSet(this); } else { // ERROR_INVALID_PARAMETER, // ERROR_NOT_FOUND (cannot find installed CounterSet), // ERROR_ALREADY_EXISTS, // ERROR_NOT_ENOUGH_MEMORY switch (Status) { case (int) UnsafeNativeMethods.ERROR_ALREADY_EXISTS: throw new ArgumentException(SR.GetString(SR.Perflib_Argument_InstanceAlreadyExists, m_instName, m_counterSet.m_counterSet), "InstanceName"); case (int) UnsafeNativeMethods.ERROR_NOT_FOUND: throw new InvalidOperationException( SR.GetString(SR.Perflib_InvalidOperation_CounterSetNotInstalled, m_counterSet.m_counterSet)); case (int) UnsafeNativeMethods.ERROR_INVALID_PARAMETER: if (m_counterSet.m_instType == CounterSetInstanceType.Single) { throw new ArgumentException(SR.GetString(SR.Perflib_Argument_InvalidInstance, m_counterSet.m_counterSet), "InstanceName"); } else { throw new Win32Exception(Status); } default: throw new Win32Exception(Status); } } } m_active = 1; } //// // // // // // // [System.Security.SecurityCritical] public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } //// // [System.Security.SecurityCritical] ~CounterSetInstance() { Dispose(false); } //// // [System.Security.SecurityCritical] private void Dispose(bool disposing) { if (disposing) { if (m_counters != null) { m_counters.Dispose(); m_counters = null; } } unsafe { if (m_nativeInst != null) { if (Interlocked.Exchange(ref m_active, 0) != 0) { if (m_nativeInst != null) { lock(m_counterSet) { if (m_counterSet.m_provider != null) { uint Status = UnsafeNativeMethods.PerfDeleteInstance(m_counterSet.m_provider.m_hProvider, m_nativeInst); } m_nativeInst = null; } } } } } } ///// // // /// Access CounterSetInstanceCounterDataSet property. Developers can then use defined indexer to access /// specific CounterData object to query/update raw counter data. /// public CounterSetInstanceCounterDataSet Counters { get { return m_counters; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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