//------------------------------------------------------------------------------
//! @file memorycache.hh
//! @author Andreas-Joachim Peters CERN
//! @brief data cache handling base class
//------------------------------------------------------------------------------

/************************************************************************
 * EOS - the CERN Disk Storage System                                   *
 * Copyright (C) 2016 CERN/Switzerland                                  *
 *                                                                      *
 * This program is free software: you can redistribute it and/or modify *
 * it under the terms of the GNU General Public License as published by *
 * the Free Software Foundation, either version 3 of the License, or    *
 * (at your option) any later version.                                  *
 *                                                                      *
 * This program is distributed in the hope that it will be useful,      *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
 * GNU General Public License for more details.                         *
 *                                                                      *
 * You should have received a copy of the GNU General Public License    *
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.*
 ************************************************************************/

#ifndef FUSE_MEMORYCACHE_HH_
#define FUSE_MEMORYCACHE_HH_

#include <sys/stat.h>
#include <sys/types.h>
#include "llfusexx.hh"
#include "bufferll.hh"
#include "cache.hh"
#include "XrdSys/XrdSysPthread.hh"
#include <map>
#include <string>

class memorycache : public cache
{
public:
  memorycache(fuse_ino_t _ino);
  virtual ~memorycache();

  // base class interface
  virtual int attach(fuse_req_t req, std::string& cookie, int flags) override;
  virtual int detach(std::string& cookie) override;
  virtual int unlink() override;

  virtual ssize_t pread(void* buf, size_t count, off_t offset) override;
  virtual ssize_t pwrite(const void* buf, size_t count, off_t offset) override;

  virtual int truncate(off_t) override;
  virtual int sync() override;

  virtual size_t size() override;

  virtual int set_attr(const std::string& key, const std::string& value) override;
  virtual int attr(const std::string& key, std::string& value) override;

private:
  bufferll buffer;
  XrdSysMutex xattrmtx;
  std::map<std::string, std::string> xattr;
  fuse_ino_t ino;
};




#endif /* FUSE_MEMORYCACHE_HH_ */