SharedMemory.h

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// -*- C++ -*-
#ifndef COIL_SHAREDMEMORY_H
#define COIL_SHAREDMEMORY_H


#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>

#include <string>

#include <coil/config_coil.h>

#define DEFAULT_MEMORY_SIZE 2097152



namespace coil
{
  class SharedMemory
  {
  public:

    SharedMemory();



    virtual ~SharedMemory();

    SharedMemory(const SharedMemory& rhs);

    SharedMemory& operator=(const SharedMemory& rhs);


    virtual int create(std::string shm_address,
                     int memory_size = DEFAULT_MEMORY_SIZE);


    virtual int open(std::string shm_address,
        int memory_size = DEFAULT_MEMORY_SIZE);


    virtual int write(const char *data, const int pos, const int size);


    virtual int read(char* data, const int pos, const int size);

    virtual int close();
    virtual unsigned int get_size();
    virtual std::string get_addresss();
    virtual char *get_data();
    virtual int unlink();
    virtual bool created();

  private:
    int m_memory_size;
    std::string m_shm_address;
    char *m_shm;
    bool m_file_create;
    int m_fd;
  };  // class SharedMemory

};  // namespace coil

#endif // SharedMemory_h