sqlite-output.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2018 Natale Patriciello <natale.patriciello@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#ifndef SQLITE_OUTPUT_H
#define SQLITE_OUTPUT_H

#include "ns3/stats-config.h"
#include "ns3/simple-ref-count.h"
#include <sqlite3.h>
#include <string>
#ifdef HAVE_SEMAPHORE_H
#include <semaphore.h>
#else
#error "Can't compile this unit without <semaphore.h>"
#endif

namespace ns3 {

class SQLiteOutput : public SimpleRefCount <SQLiteOutput>
{
public:
  SQLiteOutput (const std::string &name, const std::string &semName);
  ~SQLiteOutput ();

  void SetJournalInMemory ();

  bool SpinExec (const std::string &cmd) const;

  bool SpinExec (sqlite3_stmt *stmt) const;
  bool WaitExec (const std::string &cmd) const;

  bool WaitExec (sqlite3_stmt *stmt) const;

  bool WaitPrepare (sqlite3_stmt **stmt, const std::string &cmd) const;

  bool SpinPrepare (sqlite3_stmt **stmt, const std::string &cmd) const;

  template<typename T>
  bool Bind (sqlite3_stmt *stmt, int pos, const T &value) const;

  template<typename T>
  T RetrieveColumn (sqlite3_stmt *stmt, int pos) const;

  static int SpinStep (sqlite3_stmt *stmt);
  static int SpinFinalize (sqlite3_stmt *stmt);

  static int SpinReset (sqlite3_stmt *stmt);

protected:
  int WaitExec (sqlite3 *db, const std::string &cmd) const;
  int WaitExec (sqlite3 *db, sqlite3_stmt *stmt) const;
  int WaitPrepare (sqlite3 *db, sqlite3_stmt **stmt, const std::string &cmd) const;

  static int SpinExec (sqlite3 *db, const std::string &cmd);

  static int SpinExec (sqlite3 *db, sqlite3_stmt *stmt);
  static int SpinPrepare (sqlite3 *db, sqlite3_stmt **stmt, const std::string &cmd);

  [[ noreturn ]] static void Error (sqlite3 *db, const std::string &cmd);
  static bool CheckError (sqlite3 *db, int rc, const std::string &cmd,
                          sem_t *sem, bool hardExit);

private:
  std::string m_dBname;      
  std::string m_semName;     
  sqlite3 *m_db {
    nullptr
  };                         
};

} // namespace ns3
#endif