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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.IO;
using System.Collections;
using System.Runtime.Versioning;
using System.Diagnostics.Contracts;
using System.Diagnostics.CodeAnalysis;
namespace System.Diagnostics
{
[Serializable]
internal class LogSwitch
{
// ! WARNING !
// If any fields are added/deleted/modified, perform the
// same in the EE code (debugdebugger.cpp/debugdebugger.h)
internal String strName;
internal String strDescription;
private LogSwitch ParentSwitch;
internal volatile LoggingLevels iLevel;
internal volatile LoggingLevels iOldLevel;
// ! END WARNING !
private LogSwitch()
{
}
// Constructs a LogSwitch. A LogSwitch is used to categorize log messages.
//
// All switches (except for the global LogSwitch) have a parent LogSwitch.
//
public LogSwitch(String name, String description, LogSwitch parent)
{
if (name != null && name.Length == 0)
throw new ArgumentOutOfRangeException(nameof(Name), SR.Argument_StringZeroLength);
Contract.EndContractBlock();
if ((name != null) && (parent != null))
{
strName = name;
strDescription = description;
iLevel = LoggingLevels.ErrorLevel;
iOldLevel = iLevel;
ParentSwitch = parent;
Log.m_Hashtable.Add(strName, this);
// Call into the EE to let it know about the creation of
// this switch
Log.AddLogSwitch(this);
}
else
throw new ArgumentNullException((name == null ? nameof(name) : nameof(parent)));
}
internal LogSwitch(String name, String description)
{
strName = name;
strDescription = description;
iLevel = LoggingLevels.ErrorLevel;
iOldLevel = iLevel;
ParentSwitch = null;
Log.m_Hashtable.Add(strName, this);
// Call into the EE to let it know about the creation of
// this switch
Log.AddLogSwitch(this);
}
// Get property returns the name of the switch
public virtual String Name
{
get { return strName; }
}
// Property to Get/Set the level of log messages which are "on" for the switch.
//
public virtual LoggingLevels MinimumLevel
{
get { return iLevel; }
set
{
iLevel = value;
iOldLevel = value;
String strParentName = ParentSwitch != null ? ParentSwitch.Name : "";
if (Debugger.IsAttached)
Log.ModifyLogSwitch((int)iLevel, strName, strParentName);
Log.InvokeLogSwitchLevelHandlers(this, iLevel);
}
}
// Checks if the given level is "on" for this switch or one of its parents.
//
public virtual bool CheckLevel(LoggingLevels level)
{
if (iLevel > level)
{
// recurse through the list till parent is hit.
if (ParentSwitch == null)
return false;
else
return ParentSwitch.CheckLevel(level);
}
else
return true;
}
// Returns a switch with the particular name, if any. Returns null if no
// such switch exists.
public static LogSwitch GetSwitch(String name)
{
return (LogSwitch)Log.m_Hashtable[name];
}
}
}
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