/* Copyright (C) 2014 InfiniDB, Inc.

   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; version 2 of
   the License.

   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 Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/******************************************************************************
 * $Id: rgnode.h 1823 2013-01-21 14:13:09Z rdempsey $
 *
 *****************************************************************************/

/** @file
 * class RGNode interface.  This is a base class for the nodes in the resource graph.
 */

#pragma once

#include <set>

#include "brmtypes.h"

#define EXPORT

namespace BRM
{
class RGNode;

class RGNode
{
 public:
  EXPORT RGNode();
  EXPORT RGNode(const RGNode&);
  EXPORT virtual ~RGNode();

  EXPORT RGNode& operator=(const RGNode&);

  EXPORT uint64_t color() const;
  EXPORT void color(uint64_t);
  EXPORT void addOutEdge(RGNode*);
  EXPORT void addInEdge(RGNode*);
  EXPORT void removeOutEdge(RGNode*);
  EXPORT void removeInEdge(RGNode*);

  friend class LBIDResourceGraph;

 protected:
  // adjacency lists.  Technically these should be private, but ResourceNode
  // currently uses them to wake connected transactions.  TBD...
  std::set<RGNode*> out;
  std::set<RGNode*> in;

 private:
  uint64_t _color;
};

}  // namespace BRM

#undef EXPORT