76 lines
2.4 KiB
C#
76 lines
2.4 KiB
C#
#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.ComponentModel;
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using System.Threading;
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using PdfSharp.Pdf.Internal;
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namespace PdfSharp.Internal
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{
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/// <summary>
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/// Static locking functions to make PDFsharp thread save.
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/// </summary>
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internal static class Lock
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{
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public static void EnterGdiPlus()
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{
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//if (_fontFactoryLockCount > 0)
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// throw new InvalidOperationException("");
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Monitor.Enter(GdiPlus);
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_gdiPlusLockCount++;
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}
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public static void ExitGdiPlus()
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{
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_gdiPlusLockCount--;
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Monitor.Exit(GdiPlus);
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}
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static readonly object GdiPlus = new object();
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static int _gdiPlusLockCount;
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public static void EnterFontFactory()
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{
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Monitor.Enter(FontFactory);
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_fontFactoryLockCount++;
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}
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public static void ExitFontFactory()
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{
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_fontFactoryLockCount--;
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Monitor.Exit(FontFactory);
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}
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static readonly object FontFactory = new object();
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[ThreadStatic]
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static int _fontFactoryLockCount;
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}
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}
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