{

CMemoryMapFile();

CMemoryMapFile(_IN_ const char* fileName, _IN_ long initFileSize);

virtual ~CMemoryMapFile();

virtual long getWritePosition();

virtual bool setWritePosition(_IN_ long pos);

virtual bool writeData(_IN_ const void* buffer, _IN_ long size);

virtual bool writeData(_IN_ long startPosition, _IN_ const void* buffer, _IN_ long size);

virtual long getReadPosition();

virtual bool setReadPosition(_IN_ long pos);

virtual bool readData(_OUT_ void* buffer, _IN_ long size);

virtual bool readData(_IN_ long startPosition, _OUT_ void* buffer, _IN_ long size);

virtual long getCapacity();

virtual long getFileSize();

virtual const void* getRawMemory();

bool MMOpen(_IN_ const char* fileName, _IN_ long initFileSize);

bool MMClose();

bool reSizeFile(long new_size);

int m_fd;

long m_capacity;

long m_size;

void* m_map_file_ptr;

char* m_file_write_ptr;

char* m_file_read_ptr;