/
EventKeyword.cs
84 lines (72 loc) · 2.14 KB
/
EventKeyword.cs
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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.
using System.Collections.Generic;
namespace System.Diagnostics.Eventing.Reader
{
/// <summary>
/// Describes the metadata for a specific Keyword defined by a Provider.
/// An instance of this class is obtained from a ProviderMetadata object.
/// </summary>
public sealed class EventKeyword
{
private string _name;
private string _displayName;
private bool _dataReady;
private readonly ProviderMetadata _pmReference;
private readonly object _syncObject;
internal EventKeyword(long value, ProviderMetadata pmReference)
{
Value = value;
_pmReference = pmReference;
_syncObject = new object();
}
internal EventKeyword(string name, long value, string displayName)
{
Value = value;
_name = name;
_displayName = displayName;
_dataReady = true;
_syncObject = new object();
}
internal void PrepareData()
{
if (_dataReady)
return;
lock (_syncObject)
{
if (_dataReady)
return;
IEnumerable<EventKeyword> result = _pmReference.Keywords;
_name = null;
_displayName = null;
_dataReady = true;
foreach (EventKeyword key in result)
{
if (key.Value == Value)
{
_name = key.Name;
_displayName = key.DisplayName;
break;
}
}
}
}
public string Name
{
get
{
PrepareData();
return _name;
}
}
public long Value { get; }
public string DisplayName
{
get
{
PrepareData();
return _displayName;
}
}
}
}