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FXMemMap.h
1 /********************************************************************************
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3 * M e m o r y M a p p e d F i l e *
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5 *********************************************************************************
6 * Copyright (C) 2004,2017 by Jeroen van der Zijp. All Rights Reserved. *
7 *********************************************************************************
8 * This library is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU Lesser General Public License as published by *
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16 * GNU Lesser General Public License for more details. *
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21 #ifndef FXMEMMAP_H
22 #define FXMEMMAP_H
23 
24 #ifndef FXFILE_H
25 #include "FXFile.h"
26 #endif
27 
28 namespace FX {
29 
30 
39 class FXAPI FXMemMap : public FXFile {
40 private:
41  FXInputHandle maphandle; // Handle for the map
42  FXuchar* mapbase; // Memory base where it is mapped
43  FXlong mapoffset; // Offset of the map
44  FXival maplength; // Length of the map
45 private:
46  FXMemMap(const FXMemMap&);
47  FXMemMap &operator=(const FXMemMap&);
48 public:
49 
51  FXMemMap();
52 
54  void* openMap(const FXString& filename,FXlong off=0,FXival len=-1L,FXuint m=FXIO::Reading,FXuint p=FXIO::AllReadWrite);
55 
57  void* openMap(FXInputHandle h,FXlong off=0,FXival len=-1L,FXuint m=FXIO::Reading);
58 
60  void *map(FXlong off=0,FXival len=-1L);
61 
63  void* base() const { return mapbase; }
64 
66  FXival length() const { return maplength; }
67 
69  FXlong offset() const { return mapoffset; }
70 
72  virtual FXlong position() const;
73 
75  virtual FXlong position(FXlong off,FXuint from=FXIO::Begin);
76 
78  void* unmap();
79 
81  virtual FXival readBlock(void* ptr,FXival count);
82 
84  virtual FXival writeBlock(const void* ptr,FXival count);
85 
87  virtual FXbool flush();
88 
90  virtual FXbool close();
91 
93  ~FXMemMap();
94  };
95 
96 
97 }
98 
99 #endif

Copyright © 1997-2016 Jeroen van der Zijp