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/********************************************************************************
* *
* M a p p e d F i l e C l a s s *
* *
*********************************************************************************
* Copyright (C) 2023 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#ifndef FXMAPPEDFILE_H
#define FXMAPPEDFILE_H
#ifndef FXFILE_H
#include "FXFile.h"
#endif
//////////////////////////// UNDER DEVELOPMENT ////////////////////////////////
namespace FX {
/**
* Memory mapped file.
*/
class FXAPI FXMappedFile : public FXIODevice {
private:
FXInputHandle memhandle; // Handle for the map
FXptr mempointer; // Memory base where it is mapped
FXlong memlength; // Length of the map
FXlong memoffset; // Offset of the map
private:
FXMappedFile(const FXMappedFile&);
FXMappedFile &operator=(const FXMappedFile&);
public:
/// Construct a memory map
FXMappedFile();
/// Open a file, and map a view of it into memory; the offset must be a multiple of the page size
FXptr open(const FXString& filename,FXuint m=FXIO::Reading,FXuint perm=FXIO::AllReadWrite,FXlong len=0,FXlong off=0);
/// Return true if serial access only
virtual FXbool isSerial() const;
/// Return pointer to memory area
FXptr data() const { return mempointer; }
/// Obtain length of the map
FXival length() const { return memlength; }
/// Obtain offset of the map
FXlong offset() const { return memoffset; }
/// Return size
virtual FXlong size();
/// Flush to disk
virtual FXbool flush();
/// Close file, and also the map
virtual FXbool close();
/// Return memory mapping granularity
static FXival granularity();
/// Destroy the map
virtual ~FXMappedFile();
};
}
#endif
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