IOTypes.h

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#ifndef STORAGE_FACTORY_IO_TYPES_H
# define STORAGE_FACTORY_IO_TYPES_H

# include <cstdint>
# include <cstdlib>

#define EDM_IOFD_INVALID -1

typedef size_t IOSize;

typedef int64_t IOOffset;

typedef int IOFD;

enum IOMask {
  IORead    = 0x01, //< Read
  IOWrite   = 0x02, //< Write
  IOUrgent  = 0x04, //< Exceptional or urgent condition
  IOAccept  = 0x08, //< Socket accept
  IOConnect = 0x10  //< Socket connect
};

inline IOSize
IOSized (IOOffset n)
{
  // If IOSize and IOOffset are the same size, largest positive value
  // is half of maximum IOSize.  Otherwise all bits of IOSize work.
  IOOffset largest = (sizeof (IOOffset) == sizeof (IOSize)
                      ? ~IOSize(0)/2 : ~IOSize(0));
  return IOSize (n > largest ? largest : n);
}

#endif // STORAGE_FACTORY_IO_TYPES_H