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/*************************************************************************************
Extended WPF Toolkit
Copyright (C) 2007-2013 Xceed Software Inc.
This program is provided to you under the terms of the Microsoft Public
License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
For more features, controls, and fast professional support,
pick up the Plus Edition at http://xceed.com/wpf_toolkit
Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
***********************************************************************************/
using System;
namespace Xceed.Wpf.AvalonDock.Controls
{
internal class ReentrantFlag
{
#region Members
private bool _flag = false;
#endregion
#region Properties
public bool CanEnter
{
get
{
return !_flag;
}
}
#endregion
#region Public Methods
public _ReentrantFlagHandler Enter()
{
if( _flag )
throw new InvalidOperationException();
return new _ReentrantFlagHandler( this );
}
#endregion
#region Internal Classes
public class _ReentrantFlagHandler : IDisposable
{
private ReentrantFlag _owner;
public _ReentrantFlagHandler( ReentrantFlag owner )
{
_owner = owner;
_owner._flag = true;
}
public void Dispose()
{
_owner._flag = false;
}
}
#endregion
}
}
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