1 /* 2 An index set is a generalization of a subset of integers. Index sets 3 are used for defining scatters and gathers. 4 */ 5 #if !defined(__PETSCIS_H) 6 #define __PETSCIS_H 7 #include "petsc.h" 8 PETSC_EXTERN_CXX_BEGIN 9 10 extern PETSCVEC_DLLEXPORT PetscCookie IS_COOKIE; 11 12 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISInitializePackage(const char[]); 13 14 /*S 15 IS - Abstract PETSc object that indexing. 16 17 Level: beginner 18 19 Concepts: indexing, stride 20 21 .seealso: ISCreateGeneral(), ISCreateBlock(), ISCreateStride(), ISGetIndices(), ISDestroy() 22 S*/ 23 typedef struct _p_IS* IS; 24 25 /* 26 Default index set data structures that PETSc provides. 27 */ 28 typedef enum {IS_GENERAL=0,IS_STRIDE=1,IS_BLOCK = 2} ISType; 29 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISCreateGeneral(MPI_Comm,PetscInt,const PetscInt[],IS *); 30 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISCreateGeneralNC(MPI_Comm,PetscInt,const PetscInt[],IS *); 31 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISCreateGeneralWithArray(MPI_Comm,PetscInt,PetscInt[],IS *); 32 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISCreateBlock(MPI_Comm,PetscInt,PetscInt,const PetscInt[],IS *); 33 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISCreateStride(MPI_Comm,PetscInt,PetscInt,PetscInt,IS *); 34 35 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISDestroy(IS); 36 37 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISSetPermutation(IS); 38 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISPermutation(IS,PetscTruth*); 39 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISSetIdentity(IS); 40 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISIdentity(IS,PetscTruth*); 41 42 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISGetIndices(IS,PetscInt *[]); 43 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISRestoreIndices(IS,PetscInt *[]); 44 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISGetSize(IS,PetscInt *); 45 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISGetLocalSize(IS,PetscInt *); 46 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISInvertPermutation(IS,PetscInt,IS*); 47 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISView(IS,PetscViewer); 48 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISEqual(IS,IS,PetscTruth *); 49 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISSort(IS); 50 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISSorted(IS,PetscTruth *); 51 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISDifference(IS,IS,IS*); 52 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISSum(IS,IS,IS*); 53 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISExpand(IS,IS,IS*); 54 55 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISBlock(IS,PetscTruth*); 56 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISBlockGetIndices(IS,PetscInt *[]); 57 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISBlockRestoreIndices(IS,PetscInt *[]); 58 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISBlockGetLocalSize(IS,PetscInt *); 59 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISBlockGetSize(IS,PetscInt *); 60 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISBlockGetBlockSize(IS,PetscInt *); 61 62 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISStride(IS,PetscTruth*); 63 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISStrideGetInfo(IS,PetscInt *,PetscInt*); 64 65 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISStrideToGeneral(IS); 66 67 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISDuplicate(IS,IS*); 68 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISAllGather(IS,IS*); 69 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISComplement(IS,PetscInt,PetscInt,IS*); 70 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISAllGatherIndices(MPI_Comm,PetscInt,const PetscInt[],PetscInt*,PetscInt*[]); 71 72 /* --------------------------------------------------------------------------*/ 73 extern PETSCVEC_DLLEXPORT PetscCookie IS_LTOGM_COOKIE; 74 75 /*S 76 ISLocalToGlobalMapping - mappings from an arbitrary 77 local ordering from 0 to n-1 to a global PETSc ordering 78 used by a vector or matrix. 79 80 Level: intermediate 81 82 Note: mapping from Local to Global is scalable; but Global 83 to Local may not be if the range of global values represented locally 84 is very large. 85 86 Note: the ISLocalToGlobalMapping is actually a private object; it is included 87 here for the MACRO ISLocalToGlobalMappingApply() to allow it to be inlined since 88 it is used so often. 89 90 .seealso: ISLocalToGlobalMappingCreate() 91 S*/ 92 struct _p_ISLocalToGlobalMapping{ 93 PETSCHEADER(int); 94 PetscInt n; /* number of local indices */ 95 PetscInt *indices; /* global index of each local index */ 96 PetscInt globalstart; /* first global referenced in indices */ 97 PetscInt globalend; /* last + 1 global referenced in indices */ 98 PetscInt *globals; /* local index for each global index between start and end */ 99 }; 100 typedef struct _p_ISLocalToGlobalMapping* ISLocalToGlobalMapping; 101 102 /*E 103 ISGlobalToLocalMappingType - Indicates if missing global indices are 104 105 IS_GTOLM_MASK - missing global indices are replaced with -1 106 IS_GTOLM_DROP - missing global indices are dropped 107 108 Level: beginner 109 110 .seealso: ISGlobalToLocalMappingApply() 111 112 E*/ 113 typedef enum {IS_GTOLM_MASK,IS_GTOLM_DROP} ISGlobalToLocalMappingType; 114 115 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingCreate(MPI_Comm,PetscInt,const PetscInt[],ISLocalToGlobalMapping*); 116 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingCreateNC(MPI_Comm,PetscInt,const PetscInt[],ISLocalToGlobalMapping*); 117 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingCreateIS(IS,ISLocalToGlobalMapping *); 118 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingView(ISLocalToGlobalMapping,PetscViewer); 119 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingDestroy(ISLocalToGlobalMapping); 120 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingApplyIS(ISLocalToGlobalMapping,IS,IS*); 121 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISGlobalToLocalMappingApply(ISLocalToGlobalMapping,ISGlobalToLocalMappingType,PetscInt,const PetscInt[],PetscInt*,PetscInt[]); 122 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingGetSize(ISLocalToGlobalMapping,PetscInt*); 123 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingGetInfo(ISLocalToGlobalMapping,PetscInt*,PetscInt*[],PetscInt*[],PetscInt**[]); 124 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingRestoreInfo(ISLocalToGlobalMapping,PetscInt*,PetscInt*[],PetscInt*[],PetscInt**[]); 125 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISLocalToGlobalMappingBlock(ISLocalToGlobalMapping,PetscInt,ISLocalToGlobalMapping*); 126 127 PETSC_STATIC_INLINE PetscErrorCode ISLocalToGlobalMappingApply(ISLocalToGlobalMapping mapping,PetscInt N,const PetscInt in[],PetscInt out[]){ 128 PetscInt i,*idx = mapping->indices,Nmax = mapping->n; 129 for (i=0; i<N; i++) { 130 if (in[i] < 0) {out[i] = in[i]; continue;} 131 if (in[i] >= Nmax) SETERRQ3(PETSC_ERR_ARG_OUTOFRANGE,"Local index %D too large %D (max) at %D",in[i],Nmax,i); 132 out[i] = idx[in[i]]; 133 } 134 PetscFunctionReturn(0); 135 } 136 137 /* --------------------------------------------------------------------------*/ 138 /*E 139 ISColoringType - determines if the coloring is for the entire parallel grid/graph/matrix 140 or for just the local ghosted portion 141 142 Level: beginner 143 144 $ IS_COLORING_GLOBAL - does not include the colors for ghost points, this is used when the function 145 $ is called synchronously in parallel. This requires generating a "parallel coloring". 146 $ IS_COLORING_GHOSTED - includes colors for ghost points, this is used when the function can be called 147 $ seperately on individual processes with the ghost points already filled in. Does not 148 $ require a "parallel coloring", rather each process colors its local + ghost part. 149 $ Using this can result in much less parallel communication. In the paradigm of 150 $ DAGetLocalVector() and DAGetGlobalVector() this could be called IS_COLORING_LOCAL 151 152 .seealso: DAGetColoring() 153 E*/ 154 typedef enum {IS_COLORING_GLOBAL,IS_COLORING_GHOSTED} ISColoringType; 155 extern const char *ISColoringTypes[]; 156 typedef unsigned PETSC_IS_COLOR_VALUE_TYPE ISColoringValue; 157 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISAllGatherColors(MPI_Comm,PetscInt,ISColoringValue*,PetscInt*,ISColoringValue*[]); 158 159 /*S 160 ISColoring - sets of IS's that define a coloring 161 of the underlying indices 162 163 Level: intermediate 164 165 Notes: 166 One should not access the *is records below directly because they may not yet 167 have been created. One should use ISColoringGetIS() to make sure they are 168 created when needed. 169 170 .seealso: ISColoringCreate(), ISColoringGetIS(), ISColoringView(), ISColoringGetIS() 171 S*/ 172 struct _n_ISColoring { 173 PetscInt refct; 174 PetscInt n; /* number of colors */ 175 IS *is; /* for each color indicates columns */ 176 MPI_Comm comm; 177 ISColoringValue *colors; /* for each column indicates color */ 178 PetscInt N; /* number of columns */ 179 ISColoringType ctype; 180 }; 181 typedef struct _n_ISColoring* ISColoring; 182 183 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISColoringCreate(MPI_Comm,PetscInt,PetscInt,const ISColoringValue[],ISColoring*); 184 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISColoringDestroy(ISColoring); 185 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISColoringView(ISColoring,PetscViewer); 186 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISColoringGetIS(ISColoring,PetscInt*,IS*[]); 187 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISColoringRestoreIS(ISColoring,IS*[]); 188 #define ISColoringReference(coloring) ((coloring)->refct++,0) 189 #define ISColoringSetType(coloring,type) ((coloring)->ctype = type,0) 190 191 /* --------------------------------------------------------------------------*/ 192 193 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISPartitioningToNumbering(IS,IS*); 194 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISPartitioningCount(IS,PetscInt,PetscInt[]); 195 196 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISCompressIndicesGeneral(PetscInt,PetscInt,PetscInt,const IS[],IS[]); 197 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISCompressIndicesSorted(PetscInt,PetscInt,PetscInt,const IS[],IS[]); 198 EXTERN PetscErrorCode PETSCVEC_DLLEXPORT ISExpandIndicesGeneral(PetscInt,PetscInt,PetscInt,const IS[],IS[]); 199 200 PETSC_EXTERN_CXX_END 201 #endif 202