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# csutil/mmap_posix.h

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    00001 /*
    00002     Copyright (C) 2005 by Jorrit Tyberghein
    00003               (C) 2005 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_CSUTIL_MMAP_POSIX_H__
    00021 #define __CS_CSUTIL_MMAP_POSIX_H__
    00022
    00023 #include "csextern.h"
    00024
    00035 class CS_CRYSTALSPACE_EXPORT csPlatformMemoryMappingPosix
    00036 {
    00037 protected:
    00038   struct PlatformMemoryMapping
    00039   {
    00040     void* realPtr;
    00041     size_t realSize;
    00042   };
    00043
    00044   int hMappedFile;
    00045   size_t granularity;
    00046
    00048   csPlatformMemoryMappingPosix ();
    00050   ~csPlatformMemoryMappingPosix ();
    00051
    00052   bool OpenNative (const char* filename);
    00053   bool Ok() { return hMappedFile != -1; }
    00054   size_t GetMaxSize ();
    00055
    00063   void MapWindow (PlatformMemoryMapping& mapping, size_t offset, size_t len);
    00065   void UnmapWindow (PlatformMemoryMapping& mapping);
    00066 };
    00067
    00068
    00069 #endif // __CS_CSUTIL_MMAP_POSIX_H__