SortedList_dh.h

/*@HEADER
// ***********************************************************************
//
//       Ifpack: Object-Oriented Algebraic Preconditioner Package
//                 Copyright (2009) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
*/

#ifndef SORTEDLIST_DH_H
#define SORTEDLIST_DH_H

/* for private use by mpi factorization algorithms */

#include "euclid_common.h"
#ifdef __cplusplus
extern "C"
{
#endif

  typedef struct _srecord
  {
    int col;
    int level;
    double val;
    int next;
  } SRecord;


  extern void SortedList_dhCreate (SortedList_dh * sList);
  extern void SortedList_dhDestroy (SortedList_dh sList);
  extern void SortedList_dhInit (SortedList_dh sList, SubdomainGraph_dh sg);
  extern void SortedList_dhEnforceConstraint (SortedList_dh sList,
                          SubdomainGraph_dh sg);

  extern void SortedList_dhReset (SortedList_dh sList, int row);

  extern int SortedList_dhReadCount (SortedList_dh sList);
  /* returns number of records inserted since last reset */

  extern void SortedList_dhResetGetSmallest (SortedList_dh sList);
  /* resets index used for SortedList_dhGetSmallestLowerTri().
   */

  extern SRecord *SortedList_dhGetSmallest (SortedList_dh sList);
  /* returns record with smallest column value that hasn't been
     retrieved via this method since last call to SortedList_dhReset()
     or SortedList_dhResetGetSmallest().
     If all records have been retrieved, returns NULL.
   */

  extern SRecord *SortedList_dhGetSmallestLowerTri (SortedList_dh sList);
  /* returns record with smallest column value that hasn't been
     retrieved via this method since last call to reset.  
     Only returns records where SRecord sr.col < row (per Init).
     If all records have been retrieved, returns NULL.
   */

  extern void SortedList_dhInsert (SortedList_dh sList, SRecord * sr);
  /* unilateral insert (does not check to see if item is already
     in list); does not permute sr->col; used in numeric
     factorization routines.
   */

  extern void SortedList_dhInsertOrUpdateVal (SortedList_dh sList,
                          SRecord * sr);
  /* unilateral insert: does not check to see if already
     inserted; does not permute sr->col; used in numeric 
     factorization routines.
   */

  extern bool SortedList_dhPermuteAndInsert (SortedList_dh sList,
                         SRecord * sr, double thresh);
  /* permutes sr->col, and inserts record in sorted list.
     Note: the contents of the passed variable "sr" may be changed.
     Note: this performs sparsification 
   */


  extern void SortedList_dhInsertOrUpdate (SortedList_dh sList, SRecord * sr);
  /* if a record with identical sr->col was inserted, updates sr->level
     to smallest of the two values; otherwise, inserts the record.
     Unlike SortedList_dhPermuteAndInsert, does not permute sr->col.
     Note: the contents of the passed variable "sr" may be changed.
     Warning: do not call SortedList_dhGetSmallestLowerTri() again
     until reset is called.
   */

  extern SRecord *SortedList_dhFind (SortedList_dh sList, SRecord * sr);
  /* returns NULL if no record is found containing sr->col 
   */

  extern void SortedList_dhUpdateVal (SortedList_dh sList, SRecord * sr);
#ifdef __cplusplus
}
#endif
#endif