~drizzle-trunk/drizzle/development

/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2010 Brian Aker

 *

 *  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 2 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, write to the Free Software

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include <boost/thread/mutex.hpp>

#include <boost/thread/condition_variable.hpp>

#include <boost/unordered_map.hpp>

#include <boost/unordered/unordered_set.hpp>

#include <string>

#include "drizzled/session.h"

#include "drizzled/util/string.h"

#ifndef PLUGIN_USER_LOCKS_BARRIERS_H

#define PLUGIN_USER_LOCKS_BARRIERS_H

namespace user_locks {

namespace barriers {

const size_t LARGEST_BARRIER_NAME= 64;

enum return_t {

  SUCCESS,

  NOT_FOUND,

  NOT_OWNED_BY

};

class Barriers

{

public:

  typedef boost::unordered_map<user_locks::Key, Barrier::shared_ptr> Map;

  static Barriers &getInstance(void)

  {

    static Barriers instance;

    return instance;

  }

  bool create(const user_locks::Key &arg, drizzled::session_id_t owner);

  bool create(const user_locks::Key &arg, drizzled::session_id_t owner, int64_t wait_count);

  return_t release(const user_locks::Key &arg, drizzled::session_id_t owner);

  Barrier::shared_ptr find(const user_locks::Key &arg);

  void Copy(Map &arg);

private:

  boost::mutex mutex;

  Map barrier_map; 

};

} /* namespace barriers */

} /* namespace user_locks */

#endif /* PLUGIN_USER_LOCKS_BARRIERS_H */