// @HEADER
//
// ***********************************************************************
//
//        MueLu: A package for multigrid based preconditioning
//                  Copyright 2012 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
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// 1. Redistributions of source code must retain the above copyright
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// Questions? Contact
//                    Jonathan Hu       (jhu@sandia.gov)
//                    Andrey Prokopenko (aprokop@sandia.gov)
//                    Ray Tuminaro      (rstumin@sandia.gov)
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// @HEADER
#ifndef MUELU_TYPES_HPP
#define MUELU_TYPES_HPP

#include "MueLu_ConfigDefs.hpp"

namespace MueLu {
  enum CycleType {
    VCYCLE,
    WCYCLE
  };

  enum PreOrPost {
    PRE  = 0x1,
    POST = 0x2,
    BOTH = 0x3
  };

  // In the algorithm, aggStat[] = READY/NOTSEL/SELECTED indicates whether a node has been aggregated
  enum NodeState {
    READY      = 1, // indicates that a node is available to be
                    // selected as a root node of an aggregate

    NOTSEL     = 2, // indicates that a node has been rejected as a root node.
                    // This could perhaps be because if this node had been
                    // selected a small aggregate would have resulted
                    // This is Phase 1 specific

    AGGREGATED = 3, // indicates that a node has been assigned
                    // to an aggregate

    ONEPT      = 4, // indicates that a node shall be preserved over
                    // all multigrid levels as 1 point aggregate

    IGNORED    = 5, // indicates that the node is removed from consideration,
                    // and is not aggregated

    BOUNDARY   = 6  // node is a Dirichlet node
                    // During aggregation, it is transformed either to AGGREGATED
                    // or to IGNORED
  };

}

#endif //ifndef MUELU_TYPES_HPP
