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csutil/nulcache.h

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00001 /*
00002     Copyright (C) 2002 by Frank Richter
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008     
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013     
00014     You should have received a copy of the GNU Library General Public
00015     License along with this library; if not, write to the Free
00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __CS_UTIL_NULCACHE_H__
00020 #define __CS_UTIL_NULCACHE_H__
00021 
00025 #include "csextern.h"
00026 #include "csutil/scf_implementation.h"
00027 #include "iutil/cache.h"
00028 
00032 class CS_CRYSTALSPACE_EXPORT csNullCacheManager : 
00033   public scfImplementation1<csNullCacheManager, iCacheManager>
00034 {
00035 public:
00039   csNullCacheManager ();
00040 
00041   virtual ~csNullCacheManager ();
00042 
00043 
00044   virtual void SetReadOnly (bool) { }
00045   virtual bool IsReadOnly () const { return true; }
00046 
00050   virtual void SetCurrentType (const char* type);
00054   virtual const char* GetCurrentType () const { return 0; }
00058   virtual void SetCurrentScope (const char* scope);
00062   virtual const char* GetCurrentScope () const { return 0; }
00066   virtual bool CacheData (const void* data, size_t size,
00067         const char* type, const char* scope, uint32 id);
00071   virtual csPtr<iDataBuffer> ReadCache (const char* type, const char* scope,
00072         uint32 id);
00076   virtual bool ClearCache (const char* type = 0, const char* scope = 0,
00077         const uint32* id = 0);
00081   virtual void Flush () { }
00082 };
00083 
00084 #endif // __CS_UTIL_NULCACHE_H__
00085 

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