Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / Diagnostics / TraceSource.cs / 1 / TraceSource.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System; using System.Collections; using System.Collections.Generic; using System.Collections.Specialized; using System.Threading; using System.Configuration; using System.Security; using System.Security.Permissions; namespace System.Diagnostics { public class TraceSource { private static Listtracesources = new List (); private readonly TraceEventCache manager = new TraceEventCache(); private SourceSwitch internalSwitch; private TraceListenerCollection listeners; private StringDictionary attributes; private SourceLevels switchLevel; private string sourceName; internal bool _initCalled = false; // Whether we've called Initialize already. public TraceSource(string name) : this(name, SourceLevels.Off) { } public TraceSource(string name, SourceLevels defaultLevel) { if (name == null) throw new ArgumentNullException("name"); if (name.Length == 0) throw new ArgumentException("name"); sourceName = name; switchLevel = defaultLevel; // Delay load config to avoid perf (and working set) issues in retail // Add a weakreference to this source lock(tracesources) { tracesources.Add(new WeakReference(this)); } } private void Initialize() { if (!_initCalled) { lock(this) { if (_initCalled) return; SourceElementsCollection sourceElements = DiagnosticsConfiguration.Sources; if (sourceElements != null) { SourceElement sourceElement = sourceElements[sourceName]; if (sourceElement != null) { if (!String.IsNullOrEmpty(sourceElement.SwitchName)) { CreateSwitch(sourceElement.SwitchType, sourceElement.SwitchName); } else { CreateSwitch(sourceElement.SwitchType, sourceName); if (!String.IsNullOrEmpty(sourceElement.SwitchValue)) internalSwitch.Level = (SourceLevels) Enum.Parse(typeof(SourceLevels), sourceElement.SwitchValue); } listeners = sourceElement.Listeners.GetRuntimeObject(); attributes = new StringDictionary(); TraceUtils.VerifyAttributes(sourceElement.Attributes, GetSupportedAttributes(), this); attributes.contents = sourceElement.Attributes; } else NoConfigInit(); } else NoConfigInit(); _initCalled = true; } } } private void NoConfigInit() { internalSwitch = new SourceSwitch(sourceName, switchLevel.ToString()); listeners = new TraceListenerCollection(); listeners.Add(new DefaultTraceListener()); attributes = null; } [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.UnmanagedCode)] public void Close() { // No need to call Initialize() if (listeners != null) { // Use global lock lock (TraceInternal.critSec) { foreach (TraceListener listener in listeners) { listener.Close(); } } } } public void Flush() { // No need to call Initialize() if (listeners != null) { if (TraceInternal.UseGlobalLock) { lock (TraceInternal.critSec) { foreach (TraceListener listener in listeners) { listener.Flush(); } } } else { foreach (TraceListener listener in listeners) { if (!listener.IsThreadSafe) { lock (listener) { listener.Flush(); } } else { listener.Flush(); } } } } } virtual protected internal string[] GetSupportedAttributes() { return null; } internal static void RefreshAll() { lock (tracesources) { for (int i=0; i
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