1: #ifndef PETSC_MAT_MPIADJ_H 2: #define PETSC_MAT_MPIADJ_H 4: #include <petsc/private/matimpl.h> 5: #include <petsc/private/hashsetij.h> 7: /* 8: MATMPIAdj format - Compressed row storage for storing adjacency lists, and possibly weights 9: This is for grid reorderings (to reduce bandwidth) 10: grid partitionings, etc. 11: */ 13: typedef struct { 14: PetscHSetIJ ht; 16: /* 17: once the matrix is assembled (either by calling MatAssemblyBegin/End() or MatMPIAdjSetPreallocation() or MatCreateMPIAdj() 18: then the data structures below are valid and cannot be changed 19: */ 20: PetscInt nz; 21: PetscInt *diag; /* pointers to diagonal elements, if they exist */ 22: PetscInt *i; /* pointer to beginning of each row */ 23: PetscInt *j; /* column values: j + i[k] is start of row k */ 24: PetscInt *values; /* numerical values */ 25: PetscBool useedgeweights; /* if edge weights are used */ 26: PetscBool symmetric; /* user indicates the nonzero structure is symmetric */ 27: PetscBool freeaij; /* free a, i,j at destroy */ 28: PetscBool freeaijwithfree; /* use free() to free i,j instead of PetscFree() */ 29: PetscScalar *rowvalues; /* scalar work space for MatGetRow() */ 30: PetscInt rowvalues_alloc; 31: } Mat_MPIAdj; 33: #endif