Actual source code: dmimpl.h


  2: #if !defined(_DMIMPL_H)
  3: #define _DMIMPL_H

  5: #include <petscdm.h>
  6: #ifdef PETSC_HAVE_LIBCEED
  7: #include <petscdmceed.h>
  8: #endif
  9: #include <petsc/private/petscimpl.h>
 10: #include <petsc/private/petscdsimpl.h>
 11: #include <petsc/private/sectionimpl.h>

 13: PETSC_EXTERN PetscBool DMRegisterAllCalled;
 14: PETSC_EXTERN PetscErrorCode DMRegisterAll(void);
 15: typedef PetscErrorCode (*NullSpaceFunc)(DM dm, PetscInt origField, PetscInt field, MatNullSpace *nullSpace);

 17: typedef struct _PetscHashAuxKey
 18: {
 19:   DMLabel  label;
 20:   PetscInt value;
 21:   PetscInt part;
 22: } PetscHashAuxKey;

 24: #define PetscHashAuxKeyHash(key) PetscHashCombine(PetscHashCombine(PetscHashPointer((key).label),PetscHashInt((key).value)),PetscHashInt((key).part))

 26: #define PetscHashAuxKeyEqual(k1,k2) (((k1).label == (k2).label) ? (((k1).value == (k2).value) ? ((k1).part == (k2).part) : 0) : 0)

 28: PETSC_HASH_MAP(HMapAux, PetscHashAuxKey, Vec, PetscHashAuxKeyHash, PetscHashAuxKeyEqual, NULL)

 30: struct _n_DMGeneratorFunctionList {
 31:   PetscErrorCode (*generate)(DM, PetscBool, DM *);
 32:   PetscErrorCode (*refine)(DM, PetscReal *, DM *);
 33:   PetscErrorCode (*adapt)(DM, Vec, DMLabel, DMLabel, DM *);
 34:   char            *name;
 35:   PetscInt         dim;
 36:   DMGeneratorFunctionList next;
 37: };

 39: typedef struct _DMOps *DMOps;
 40: struct _DMOps {
 41:   PetscErrorCode (*view)(DM,PetscViewer);
 42:   PetscErrorCode (*load)(DM,PetscViewer);
 43:   PetscErrorCode (*clone)(DM,DM*);
 44:   PetscErrorCode (*setfromoptions)(PetscOptionItems*,DM);
 45:   PetscErrorCode (*setup)(DM);
 46:   PetscErrorCode (*createlocalsection)(DM);
 47:   PetscErrorCode (*createdefaultconstraints)(DM);
 48:   PetscErrorCode (*createglobalvector)(DM,Vec*);
 49:   PetscErrorCode (*createlocalvector)(DM,Vec*);
 50:   PetscErrorCode (*getlocaltoglobalmapping)(DM);
 51:   PetscErrorCode (*createfieldis)(DM,PetscInt*,char***,IS**);
 52:   PetscErrorCode (*createcoordinatedm)(DM,DM*);
 53:   PetscErrorCode (*createcoordinatefield)(DM,DMField*);

 55:   PetscErrorCode (*getcoloring)(DM,ISColoringType,ISColoring*);
 56:   PetscErrorCode (*creatematrix)(DM, Mat*);
 57:   PetscErrorCode (*createinterpolation)(DM,DM,Mat*,Vec*);
 58:   PetscErrorCode (*createrestriction)(DM,DM,Mat*);
 59:   PetscErrorCode (*createmassmatrix)(DM,DM,Mat*);
 60:   PetscErrorCode (*createmassmatrixlumped)(DM,Vec*);
 61:   PetscErrorCode (*hascreateinjection)(DM,PetscBool*);
 62:   PetscErrorCode (*createinjection)(DM,DM,Mat*);

 64:   PetscErrorCode (*refine)(DM,MPI_Comm,DM*);
 65:   PetscErrorCode (*coarsen)(DM,MPI_Comm,DM*);
 66:   PetscErrorCode (*refinehierarchy)(DM,PetscInt,DM*);
 67:   PetscErrorCode (*coarsenhierarchy)(DM,PetscInt,DM*);
 68:   PetscErrorCode (*extrude)(DM,PetscInt,DM*);

 70:   PetscErrorCode (*globaltolocalbegin)(DM,Vec,InsertMode,Vec);
 71:   PetscErrorCode (*globaltolocalend)(DM,Vec,InsertMode,Vec);
 72:   PetscErrorCode (*localtoglobalbegin)(DM,Vec,InsertMode,Vec);
 73:   PetscErrorCode (*localtoglobalend)(DM,Vec,InsertMode,Vec);
 74:   PetscErrorCode (*localtolocalbegin)(DM,Vec,InsertMode,Vec);
 75:   PetscErrorCode (*localtolocalend)(DM,Vec,InsertMode,Vec);

 77:   PetscErrorCode (*destroy)(DM);

 79:   PetscErrorCode (*computevariablebounds)(DM,Vec,Vec);

 81:   PetscErrorCode (*createsubdm)(DM,PetscInt,const PetscInt*,IS*,DM*);
 82:   PetscErrorCode (*createsuperdm)(DM*,PetscInt,IS**,DM*);
 83:   PetscErrorCode (*createfielddecomposition)(DM,PetscInt*,char***,IS**,DM**);
 84:   PetscErrorCode (*createdomaindecomposition)(DM,PetscInt*,char***,IS**,IS**,DM**);
 85:   PetscErrorCode (*createddscatters)(DM,PetscInt,DM*,VecScatter**,VecScatter**,VecScatter**);

 87:   PetscErrorCode (*getdimpoints)(DM,PetscInt,PetscInt*,PetscInt*);
 88:   PetscErrorCode (*locatepoints)(DM,Vec,DMPointLocationType,PetscSF);
 89:   PetscErrorCode (*getneighbors)(DM,PetscInt*,const PetscMPIInt**);
 90:   PetscErrorCode (*getboundingbox)(DM,PetscReal*,PetscReal*);
 91:   PetscErrorCode (*getlocalboundingbox)(DM,PetscReal*,PetscReal*);
 92:   PetscErrorCode (*locatepointssubdomain)(DM,Vec,PetscMPIInt**);

 94:   PetscErrorCode (*projectfunctionlocal)(DM,PetscReal,PetscErrorCode(**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar *,void *),void **,InsertMode,Vec);
 95:   PetscErrorCode (*projectfunctionlabellocal)(DM,PetscReal,DMLabel,PetscInt,const PetscInt[],PetscInt,const PetscInt[],PetscErrorCode(**)(PetscInt,PetscReal,const PetscReal[],PetscInt,PetscScalar *,void *),void **,InsertMode,Vec);
 96:   PetscErrorCode (*projectfieldlocal)(DM,PetscReal,Vec,void(**)(PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],PetscReal,const PetscReal[],PetscInt,const PetscScalar[],PetscScalar[]),InsertMode,Vec);
 97:   PetscErrorCode (*projectfieldlabellocal)(DM,PetscReal,DMLabel,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Vec,void(**)(PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],PetscReal,const PetscReal[],PetscInt,const PetscScalar[],PetscScalar[]),InsertMode,Vec);
 98:   PetscErrorCode (*projectbdfieldlabellocal)(DM,PetscReal,DMLabel,PetscInt,const PetscInt[],PetscInt,const PetscInt[],Vec,void(**)(PetscInt,PetscInt,PetscInt,const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],const PetscInt[],const PetscInt[],const PetscScalar[],const PetscScalar[],const PetscScalar[],PetscReal,const PetscReal[],const PetscReal[],PetscInt,const PetscScalar[],PetscScalar[]),InsertMode,Vec);
 99:   PetscErrorCode (*computel2diff)(DM,PetscReal,PetscErrorCode(**)(PetscInt, PetscReal,const PetscReal [], PetscInt, PetscScalar *, void *), void **, Vec, PetscReal *);
100:   PetscErrorCode (*computel2gradientdiff)(DM,PetscReal,PetscErrorCode(**)(PetscInt,PetscReal,const PetscReal [],const PetscReal[],PetscInt, PetscScalar *,void *),void **,Vec,const PetscReal[],PetscReal *);
101:   PetscErrorCode (*computel2fielddiff)(DM,PetscReal,PetscErrorCode(**)(PetscInt, PetscReal,const PetscReal [], PetscInt, PetscScalar *, void *), void **, Vec, PetscReal *);

103:   PetscErrorCode (*getcompatibility)(DM,DM,PetscBool*,PetscBool*);
104: };

106: PETSC_EXTERN PetscErrorCode DMLocalizeCoordinate_Internal(DM, PetscInt, const PetscScalar[], const PetscScalar[], PetscScalar[]);
107: PETSC_EXTERN PetscErrorCode DMLocalizeCoordinateReal_Internal(DM, PetscInt, const PetscReal[], const PetscReal[], PetscReal[]);
108: PETSC_EXTERN PetscErrorCode DMLocalizeAddCoordinate_Internal(DM, PetscInt, const PetscScalar[], const PetscScalar[], PetscScalar[]);

110: typedef struct _DMCoarsenHookLink *DMCoarsenHookLink;
111: struct _DMCoarsenHookLink {
112:   PetscErrorCode (*coarsenhook)(DM,DM,void*);              /* Run once, when coarse DM is created */
113:   PetscErrorCode (*restricthook)(DM,Mat,Vec,Mat,DM,void*); /* Run each time a new problem is restricted to a coarse grid */
114:   void *ctx;
115:   DMCoarsenHookLink next;
116: };

118: typedef struct _DMRefineHookLink *DMRefineHookLink;
119: struct _DMRefineHookLink {
120:   PetscErrorCode (*refinehook)(DM,DM,void*);     /* Run once, when a fine DM is created */
121:   PetscErrorCode (*interphook)(DM,Mat,DM,void*); /* Run each time a new problem is interpolated to a fine grid */
122:   void *ctx;
123:   DMRefineHookLink next;
124: };

126: typedef struct _DMSubDomainHookLink *DMSubDomainHookLink;
127: struct _DMSubDomainHookLink {
128:   PetscErrorCode (*ddhook)(DM,DM,void*);
129:   PetscErrorCode (*restricthook)(DM,VecScatter,VecScatter,DM,void*);
130:   void *ctx;
131:   DMSubDomainHookLink next;
132: };

134: typedef struct _DMGlobalToLocalHookLink *DMGlobalToLocalHookLink;
135: struct _DMGlobalToLocalHookLink {
136:   PetscErrorCode (*beginhook)(DM,Vec,InsertMode,Vec,void*);
137:   PetscErrorCode (*endhook)(DM,Vec,InsertMode,Vec,void*);
138:   void *ctx;
139:   DMGlobalToLocalHookLink next;
140: };

142: typedef struct _DMLocalToGlobalHookLink *DMLocalToGlobalHookLink;
143: struct _DMLocalToGlobalHookLink {
144:   PetscErrorCode (*beginhook)(DM,Vec,InsertMode,Vec,void*);
145:   PetscErrorCode (*endhook)(DM,Vec,InsertMode,Vec,void*);
146:   void *ctx;
147:   DMLocalToGlobalHookLink next;
148: };

150: typedef enum {DMVEC_STATUS_IN,DMVEC_STATUS_OUT} DMVecStatus;
151: typedef struct _DMNamedVecLink *DMNamedVecLink;
152: struct _DMNamedVecLink {
153:   Vec X;
154:   char *name;
155:   DMVecStatus status;
156:   DMNamedVecLink next;
157: };

159: typedef struct _DMWorkLink *DMWorkLink;
160: struct _DMWorkLink {
161:   size_t     bytes;
162:   void       *mem;
163:   DMWorkLink next;
164: };

166: #define DM_MAX_WORK_VECTORS 100 /* work vectors available to users  via DMGetGlobalVector(), DMGetLocalVector() */

168: struct _n_DMLabelLink {
169:   DMLabel              label;
170:   PetscBool            output;
171:   struct _n_DMLabelLink *next;
172: };
173: typedef struct _n_DMLabelLink *DMLabelLink;

175: typedef struct _n_Boundary *DMBoundary;

177: struct _n_Boundary {
178:   DSBoundary  dsboundary;
179:   DMLabel     label;
180:   DMBoundary  next;
181: };

183: typedef struct _n_Field {
184:   PetscObject disc;         /* Field discretization, or a PetscContainer with the field name */
185:   DMLabel     label;        /* Label defining the domain of definition of the field */
186:   PetscBool   adjacency[2]; /* Flags for defining variable influence (adjacency) for each field [use cone() or support() first, use the transitive closure] */
187:   PetscBool   avoidTensor;  /* Flag to avoid defining field over tensor cells */
188: } RegionField;

190: typedef struct _n_Space {
191:   PetscDS ds;     /* Approximation space in this domain */
192:   DMLabel label;  /* Label defining the domain of definition of the discretization */
193:   IS      fields; /* Map from DS field numbers to original field numbers in the DM */
194: } DMSpace;

196: struct _p_UniversalLabel {
197:   DMLabel    label;   /* The universal label */
198:   PetscInt   Nl;      /* Number of labels encoded */
199:   char     **names;   /* The label names */
200:   PetscInt  *indices; /* The original indices in the input DM */
201:   PetscInt   Nv;      /* Total number of values in all the labels */
202:   PetscInt  *bits;    /* Starting bit for values of each label */
203:   PetscInt  *masks;   /* Masks to pull out label value bits for each label */
204:   PetscInt  *offsets; /* Starting offset for label values for each label */
205:   PetscInt  *values;  /* Original label values before renumbering */
206: };

208: PETSC_INTERN PetscErrorCode DMDestroyLabelLinkList_Internal(DM);

210: #define MAXDMMONITORS 5

212: struct _p_DM {
213:   PETSCHEADER(struct _DMOps);
214:   Vec                     localin[DM_MAX_WORK_VECTORS],localout[DM_MAX_WORK_VECTORS];
215:   Vec                     globalin[DM_MAX_WORK_VECTORS],globalout[DM_MAX_WORK_VECTORS];
216:   DMNamedVecLink          namedglobal;
217:   DMNamedVecLink          namedlocal;
218:   DMWorkLink              workin,workout;
219:   DMLabelLink             labels;            /* Linked list of labels */
220:   DMLabel                 depthLabel;        /* Optimized access to depth label */
221:   DMLabel                 celltypeLabel;     /* Optimized access to celltype label */
222:   void                    *ctx;    /* a user context */
223:   PetscErrorCode          (*ctxdestroy)(void**);
224:   ISColoringType          coloringtype;
225:   MatFDColoring           fd;
226:   VecType                 vectype;  /* type of vector created with DMCreateLocalVector() and DMCreateGlobalVector() */
227:   MatType                 mattype;  /* type of matrix created with DMCreateMatrix() */
228:   PetscInt                bind_below; /* Local size threshold (in entries/rows) below which Vec/Mat objects are bound to CPU */
229:   PetscInt                bs;
230:   ISLocalToGlobalMapping  ltogmap;
231:   PetscBool               prealloc_skip; // Flag indicating the DMCreateMatrix() should not preallocate (only set sizes and local-to-global)
232:   PetscBool               prealloc_only; /* Flag indicating the DMCreateMatrix() should only preallocate, not fill the matrix */
233:   PetscBool               structure_only; /* Flag indicating the DMCreateMatrix() create matrix structure without values */
234:   PetscInt                levelup,leveldown;  /* if the DM has been obtained by refining (or coarsening) this indicates how many times that process has been used to generate this DM */
235:   PetscBool               setupcalled;        /* Indicates that the DM has been set up, methods that modify a DM such that a fresh setup is required should reset this flag */
236:   PetscBool               setfromoptionscalled;
237:   void                    *data;
238:   /* Hierarchy / Submeshes */
239:   DM                      coarseMesh;
240:   DM                      fineMesh;
241:   DMCoarsenHookLink       coarsenhook; /* For transfering auxiliary problem data to coarser grids */
242:   DMRefineHookLink        refinehook;
243:   DMSubDomainHookLink     subdomainhook;
244:   DMGlobalToLocalHookLink gtolhook;
245:   DMLocalToGlobalHookLink ltoghook;
246:   /* Topology */
247:   PetscInt                dim;                  /* The topological dimension */
248:   /* Auxiliary data */
249:   PetscHMapAux            auxData;              /* Auxiliary DM and Vec for region denoted by the key */
250:   /* Flexible communication */
251:   PetscSF                 sfMigration;          /* SF for point distribution created during distribution */
252:   PetscSF                 sf;                   /* SF for parallel point overlap */
253:   PetscSF                 sectionSF;            /* SF for parallel dof overlap using section */
254:   PetscSF                 sfNatural;            /* SF mapping to the "natural" ordering */
255:   PetscBool               useNatural;           /* Create the natural SF */
256:   /* Allows a non-standard data layout */
257:   PetscBool               adjacency[2];         /* [use cone() or support() first, use the transitive closure] */
258:   PetscSection            localSection;         /* Layout for local vectors */
259:   PetscSection            globalSection;        /* Layout for global vectors */
260:   PetscLayout             map;
261:   /* Constraints */
262:   struct {
263:     PetscSection section;
264:     Mat          mat;
265:     Vec          bias;
266:   } defaultConstraint;
267:   /* Basis transformation */
268:   DM                      transformDM;          /* Layout for basis transformation */
269:   Vec                     transform;            /* Basis transformation matrices */
270:   void                   *transformCtx;         /* Basis transformation context */
271:   PetscErrorCode        (*transformSetUp)(DM, void *);
272:   PetscErrorCode        (*transformDestroy)(DM, void *);
273:   PetscErrorCode        (*transformGetMatrix)(DM, const PetscReal[], PetscBool, const PetscScalar **, void *);
274:   /* Coordinates */
275:   PetscInt                dimEmbed;             /* The dimension of the embedding space */
276:   DM                      coordinateDM;         /* Layout for coordinates */
277:   Vec                     coordinates;          /* Coordinate values in global vector */
278:   Vec                     coordinatesLocal;     /* Coordinate values in local  vector */
279:   PetscBool               periodic;             /* Is the DM periodic? */
280:   DMField                 coordinateField;      /* Coordinates as an abstract field */
281:   PetscReal              *L, *maxCell;          /* Size of periodic box and max cell size for determining periodicity */
282:   DMBoundaryType         *bdtype;               /* Indicates type of topological boundary */
283:   /* Null spaces -- of course I should make this have a variable number of fields */
284:   NullSpaceFunc           nullspaceConstructors[10];
285:   NullSpaceFunc           nearnullspaceConstructors[10];
286:   /* Fields are represented by objects */
287:   PetscInt                Nf;                   /* Number of fields defined on the total domain */
288:   RegionField            *fields;               /* Array of discretization fields with regions of validity */
289:   DMBoundary              boundary;             /* List of boundary conditions */
290:   PetscInt                Nds;                  /* Number of discrete systems defined on the total domain */
291:   DMSpace                *probs;                /* Array of discrete systems */
292:   /* Output structures */
293:   DM                      dmBC;                 /* The DM with boundary conditions in the global DM */
294:   PetscInt                outputSequenceNum;    /* The current sequence number for output */
295:   PetscReal               outputSequenceVal;    /* The current sequence value for output */
296:   PetscErrorCode        (*monitor[MAXDMMONITORS])(DM, void *);
297:   PetscErrorCode        (*monitordestroy[MAXDMMONITORS])(void **);
298:   void                   *monitorcontext[MAXDMMONITORS];
299:   PetscInt                numbermonitors;

301:   PetscObject             dmksp,dmsnes,dmts;
302: #ifdef PETSC_HAVE_LIBCEED
303:   Ceed                    ceed;                 /* LibCEED context */
304:   CeedElemRestriction     ceedERestrict;        /* Map from the local vector (Lvector) to the cells (Evector) */
305: #endif
306: };

308: PETSC_EXTERN PetscLogEvent DM_Convert;
309: PETSC_EXTERN PetscLogEvent DM_GlobalToLocal;
310: PETSC_EXTERN PetscLogEvent DM_LocalToGlobal;
311: PETSC_EXTERN PetscLogEvent DM_LocatePoints;
312: PETSC_EXTERN PetscLogEvent DM_Coarsen;
313: PETSC_EXTERN PetscLogEvent DM_Refine;
314: PETSC_EXTERN PetscLogEvent DM_CreateInterpolation;
315: PETSC_EXTERN PetscLogEvent DM_CreateRestriction;
316: PETSC_EXTERN PetscLogEvent DM_CreateInjection;
317: PETSC_EXTERN PetscLogEvent DM_CreateMatrix;
318: PETSC_EXTERN PetscLogEvent DM_Load;
319: PETSC_EXTERN PetscLogEvent DM_AdaptInterpolator;

321: PETSC_EXTERN PetscErrorCode DMCreateGlobalVector_Section_Private(DM,Vec*);
322: PETSC_EXTERN PetscErrorCode DMCreateLocalVector_Section_Private(DM,Vec*);

324: PETSC_EXTERN PetscErrorCode DMView_GLVis(DM,PetscViewer,PetscErrorCode(*)(DM,PetscViewer));

326: /*

328:           Composite Vectors

330:       Single global representation
331:       Individual global representations
332:       Single local representation
333:       Individual local representations

335:       Subsets of individual as a single????? Do we handle this by having DMComposite inside composite??????

337:        DM da_u, da_v, da_p

339:        DM dm_velocities

341:        DM dm

343:        DMDACreate(,&da_u);
344:        DMDACreate(,&da_v);
345:        DMCompositeCreate(,&dm_velocities);
346:        DMCompositeAddDM(dm_velocities,(DM)du);
347:        DMCompositeAddDM(dm_velocities,(DM)dv);

349:        DMDACreate(,&da_p);
350:        DMCompositeCreate(,&dm_velocities);
351:        DMCompositeAddDM(dm,(DM)dm_velocities);
352:        DMCompositeAddDM(dm,(DM)dm_p);

354:     Access parts of composite vectors (Composite only)
355:     ---------------------------------
356:       DMCompositeGetAccess  - access the global vector as subvectors and array (for redundant arrays)
357:       ADD for local vector -

359:     Element access
360:     --------------
361:       From global vectors
362:          -DAVecGetArray   - for DMDA
363:          -VecGetArray - for DMSliced
364:          ADD for DMComposite???  maybe

366:       From individual vector
367:           -DAVecGetArray - for DMDA
368:           -VecGetArray -for sliced
369:          ADD for DMComposite??? maybe

371:       From single local vector
372:           ADD         * single local vector as arrays?

374:    Communication
375:    -------------
376:       DMGlobalToLocal - global vector to single local vector

378:       DMCompositeScatter/Gather - direct to individual local vectors and arrays   CHANGE name closer to GlobalToLocal?

380:    Obtaining vectors
381:    -----------------
382:       DMCreateGlobal/Local
383:       DMGetGlobal/Local
384:       DMCompositeGetLocalVectors   - gives individual local work vectors and arrays

386:     ?????   individual global vectors   ????

388: */

390: #if defined(PETSC_HAVE_HDF5)
391: PETSC_EXTERN PetscErrorCode DMSequenceLoad_HDF5_Internal(DM, const char *, PetscInt, PetscScalar *, PetscViewer);
392: #endif

394: static inline PetscErrorCode DMGetLocalOffset_Private(DM dm, PetscInt point, PetscInt *start, PetscInt *end)
395: {
397: #if defined(PETSC_USE_DEBUG)
398:   {
399:     PetscInt dof;

401:     *start = *end = 0; /* Silence overzealous compiler warning */
403:     PetscSectionGetOffset(dm->localSection, point, start);
404:     PetscSectionGetDof(dm->localSection, point, &dof);
405:     *end = *start + dof;
406:   }
407: #else
408:   {
409:     const PetscSection s = dm->localSection;
410:     *start = s->atlasOff[point - s->pStart];
411:     *end   = *start + s->atlasDof[point - s->pStart];
412:   }
413: #endif
414:   return 0;
415: }

417: static inline PetscErrorCode DMGetLocalFieldOffset_Private(DM dm, PetscInt point, PetscInt field, PetscInt *start, PetscInt *end)
418: {
419: #if defined(PETSC_USE_DEBUG)
420:   {
421:     PetscInt       dof;
422:     *start = *end = 0; /* Silence overzealous compiler warning */
424:     PetscSectionGetFieldOffset(dm->localSection, point, field, start);
425:     PetscSectionGetFieldDof(dm->localSection, point, field, &dof);
426:     *end = *start + dof;
427:   }
428: #else
429:   {
430:     const PetscSection s = dm->localSection->field[field];
431:     *start = s->atlasOff[point - s->pStart];
432:     *end   = *start + s->atlasDof[point - s->pStart];
433:   }
434: #endif
435:   return 0;
436: }

438: static inline PetscErrorCode DMGetGlobalOffset_Private(DM dm, PetscInt point, PetscInt *start, PetscInt *end)
439: {
440: #if defined(PETSC_USE_DEBUG)
441:   {
442:     PetscInt       dof,cdof;
443:     *start = *end = 0; /* Silence overzealous compiler warning */
446:     PetscSectionGetOffset(dm->globalSection, point, start);
447:     PetscSectionGetDof(dm->globalSection, point, &dof);
448:     PetscSectionGetConstraintDof(dm->globalSection, point, &cdof);
449:     *end = *start + dof - cdof + (dof < 0 ? 1 : 0);
450:   }
451: #else
452:   {
453:     const PetscSection s    = dm->globalSection;
454:     const PetscInt     dof  = s->atlasDof[point - s->pStart];
455:     const PetscInt     cdof = s->bc ? s->bc->atlasDof[point - s->bc->pStart] : 0;
456:     *start = s->atlasOff[point - s->pStart];
457:     *end   = *start + dof - cdof + (dof < 0 ? 1 : 0);
458:   }
459: #endif
460:   return 0;
461: }

463: static inline PetscErrorCode DMGetGlobalFieldOffset_Private(DM dm, PetscInt point, PetscInt field, PetscInt *start, PetscInt *end)
464: {
465: #if defined(PETSC_USE_DEBUG)
466:   {
467:     PetscInt loff, lfoff, fdof, fcdof, ffcdof, f;
468:     *start = *end = 0; /* Silence overzealous compiler warning */
471:     PetscSectionGetOffset(dm->globalSection, point, start);
472:     PetscSectionGetOffset(dm->localSection, point, &loff);
473:     PetscSectionGetFieldOffset(dm->localSection, point, field, &lfoff);
474:     PetscSectionGetFieldDof(dm->localSection, point, field, &fdof);
475:     PetscSectionGetFieldConstraintDof(dm->localSection, point, field, &fcdof);
476:     *start = *start < 0 ? *start - (lfoff-loff) : *start + lfoff-loff;
477:     for (f = 0; f < field; ++f) {
478:       PetscSectionGetFieldConstraintDof(dm->localSection, point, f, &ffcdof);
479:       *start = *start < 0 ? *start + ffcdof : *start - ffcdof;
480:     }
481:     *end   = *start < 0 ? *start - (fdof-fcdof) : *start + fdof-fcdof;
482:   }
483: #else
484:   {
485:     const PetscSection s     = dm->localSection;
486:     const PetscSection fs    = dm->localSection->field[field];
487:     const PetscSection gs    = dm->globalSection;
488:     const PetscInt     loff  = s->atlasOff[point - s->pStart];
489:     const PetscInt     goff  = gs->atlasOff[point - s->pStart];
490:     const PetscInt     lfoff = fs->atlasOff[point - s->pStart];
491:     const PetscInt     fdof  = fs->atlasDof[point - s->pStart];
492:     const PetscInt     fcdof = fs->bc ? fs->bc->atlasDof[point - fs->bc->pStart] : 0;
493:     PetscInt           ffcdof = 0, f;

495:     for (f = 0; f < field; ++f) {
496:       const PetscSection ffs = dm->localSection->field[f];
497:       ffcdof += ffs->bc ? ffs->bc->atlasDof[point - ffs->bc->pStart] : 0;
498:     }
499:     *start = goff + (goff < 0 ? loff-lfoff + ffcdof : lfoff-loff - ffcdof);
500:     *end   = *start < 0 ? *start - (fdof-fcdof) : *start + fdof-fcdof;
501:   }
502: #endif
503:   return 0;
504: }

506: PETSC_EXTERN PetscErrorCode DMGetBasisTransformDM_Internal(DM, DM *);
507: PETSC_EXTERN PetscErrorCode DMGetBasisTransformVec_Internal(DM, Vec *);
508: PETSC_INTERN PetscErrorCode DMConstructBasisTransform_Internal(DM);

510: PETSC_INTERN PetscErrorCode DMGetLocalBoundingIndices_DMDA(DM, PetscReal[], PetscReal[]);
511: PETSC_INTERN PetscErrorCode DMSetField_Internal(DM, PetscInt, DMLabel, PetscObject);

513: PETSC_INTERN PetscErrorCode DMSetLabelValue_Fast(DM, DMLabel*, const char[], PetscInt, PetscInt);

515: PETSC_EXTERN PetscErrorCode DMUniversalLabelCreate(DM, DMUniversalLabel *);
516: PETSC_EXTERN PetscErrorCode DMUniversalLabelDestroy(DMUniversalLabel *);
517: PETSC_EXTERN PetscErrorCode DMUniversalLabelGetLabel(DMUniversalLabel, DMLabel *);
518: PETSC_EXTERN PetscErrorCode DMUniversalLabelCreateLabels(DMUniversalLabel, PetscBool, DM);
519: PETSC_EXTERN PetscErrorCode DMUniversalLabelSetLabelValue(DMUniversalLabel, DM, PetscBool, PetscInt, PetscInt);
520: PETSC_INTERN PetscInt PetscGCD(PetscInt a, PetscInt b);

522: #endif