Date: 2026-07-30T21:14:12+00:00

Actual source code: mpiadj.h

      1: #pragma once

      3: #include <petsc/private/matimpl.h>
      4: #include <petsc/private/hashsetij.h>

      6: /*
      7:   MATMPIAdj format - Compressed row storage for storing adjacency lists, and possibly weights
      8:                      This is for grid reorderings (to reduce bandwidth)
      9:                      grid partitionings, etc.
     10: */

     12: typedef struct {
     13:   PetscHSetIJ ht;

     15:   /*
     16:      once the matrix is assembled (either by calling MatAssemblyBegin/End() or MatMPIAdjSetPreallocation() or MatCreateMPIAdj()
     17:      then the data structures below are valid and cannot be changed
     18:   */
     19:   PetscInt     nz;
     20:   PetscInt    *diag;            /* pointers to diagonal elements, if they exist */
     21:   PetscInt    *i;               /* pointer to beginning of each row */
     22:   PetscInt    *j;               /* column values: j + i[k] is start of row k */
     23:   PetscInt    *values;          /* numerical values */
     24:   PetscBool    useedgeweights;  /* if edge weights are used  */
     25:   PetscBool    symmetric;       /* user indicates the nonzero structure is symmetric */
     26:   PetscBool    freeaij;         /* free a, i,j at destroy */
     27:   PetscBool    freeaijwithfree; /* use free() to free i,j instead of PetscFree() */
     28:   PetscScalar *rowvalues;       /* scalar work space for MatGetRow() */
     29:   PetscInt     rowvalues_alloc;
     30: } Mat_MPIAdj;