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