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csutil/win32/cachedll.h
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00001 /*
00002     Copyright (C) 2004 by Jorrit Tyberghein
00003               (C) 2004 by Frank Richter
00004 
00005     This library is free software; you can redistribute it and/or
00006     modify it under the terms of the GNU Library General Public
00007     License as published by the Free Software Foundation; either
00008     version 2 of the License, or (at your option) any later version.
00009 
00010     This library is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013     Library General Public License for more details.
00014 
00015     You should have received a copy of the GNU Library General Public
00016     License along with this library; if not, write to the Free
00017     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018 */      
00019 
00020 #ifndef __CS_UTIL_WIN32_CACHEDLL_H__
00021 #define __CS_UTIL_WIN32_CACHEDLL_H__
00022 
00027 namespace CS
00028 {
00029 namespace Platform
00030 {
00031 namespace Win32
00032 {
00033 
00046 class CacheDLL
00047 {
00048   const char* dllName;
00049   HMODULE dllHandle;
00050 public:
00051   CacheDLL (const char* dll) : dllName(dll), dllHandle (0)
00052   {
00053   }
00054   
00055   ~CacheDLL ()
00056   {
00057     if (dllHandle != 0)
00058       FreeLibrary (dllHandle);
00059   }
00060   
00061   HMODULE GetHandle ()
00062   {
00063     if (dllHandle == 0)
00064       dllHandle = LoadLibraryA (dllName);
00065     return dllHandle;
00066   }
00067   
00068   operator HMODULE ()
00069   {
00070     return GetHandle ();
00071   }
00072 };
00073 
00074 } // namespace CS
00075 } // namespace Platform
00076 } // namespace Win32
00077 
00078 #endif // __CS_UTIL_WIN32_CACHEDLL_H__

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