MapFile.hpp

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// DUNE DAQ modification notice:
// This file has been modified from the original ATLAS system source for the DUNE DAQ project.
// Fork baseline commit: system-00-00-20 (2020-09-25).
// Renamed since fork: yes (from system/MapFile.h to include/okssystem/MapFile.hpp).
 
/*
 *  MapFile.h
 *  OksSystem
 *
 *  Created by Matthias Wiesmann on 07.01.05.
 *  Copyright 2005 CERN. All rights reserved.
 *
 */
 
#ifndef OKSSYSTEM_MAP_FILE
#define OKSSYSTEM_MAP_FILE
 
#include "okssystem/File.hpp"
 
namespace OksSystem {
 
class Descriptor;

 
class MapFile : public File
{
 
public:
  MapFile(const std::string& file,
          size_t size,
          size_t offset,
          bool read_mode,
          bool write_mode,
          mode_t permissions = 0666);
  ~MapFile();
 
  void zero() const;                  
  void map();                         
  void unmap();                       
  bool is_mapped() const;             
  bool is_loaded() const throw();     
  void* address() const throw();      
  size_t memory_size() const throw(); 
  OksSystem::Descriptor* fd() const
    throw(); 
 
protected:
  void open_fd();   
  void close_fd();  
  void map_mem();   
  void unmap_mem(); 
 
  void* m_map_address;          
  size_t m_map_size;            
  size_t m_map_offset;          
  Descriptor* m_map_descriptor; 
  mode_t m_map_permission;      
  bool m_map_read;              
  bool m_map_write;             
  bool m_is_mapped;             
 
private:
  static const char* const MAP_LOAD_MSG;      
  static const char* const MAP_NOT_LOAD_MSG;  
  static const char* const PAGE_SIZE_MSG;     
  static const char* const READ_OR_WRITE_MSG; 
  static const char* const MAP_NOT_WRITE_MSG; 
 
}; // MapFile
 
} // ers
 
#endif