Date: 2022-03-04T17:37:39+00:00

Actual source code: sectionimpl.h

      1: #if !defined(PETSCSECTIONIMPL_H)
      2: #define PETSCSECTIONIMPL_H

      4: #include <petscsection.h>
      5: #include <petsc/private/petscimpl.h>
      6: #include <petsc/private/hashmap.h>

      8: typedef struct PetscSectionClosurePermKey {
      9:   PetscInt    depth, size;
     10: } PetscSectionClosurePermKey;

     12: typedef struct {
     13:   PetscInt *perm, *invPerm;
     14: } PetscSectionClosurePermVal;

     16: PETSC_STATIC_INLINE PetscHash_t PetscSectionClosurePermHash(PetscSectionClosurePermKey k)
     17: {
     18:   return PetscHashCombine(PetscHashInt(k.depth), PetscHashInt(k.size));
     19: }

     21: PETSC_STATIC_INLINE int PetscSectionClosurePermEqual(PetscSectionClosurePermKey k1, PetscSectionClosurePermKey k2)
     22: {
     23:   return k1.depth == k2.depth && k1.size == k2.size;
     24: }

     26: static PetscSectionClosurePermVal PetscSectionClosurePermVal_Empty = {NULL, NULL};
     27: PETSC_HASH_MAP(ClPerm, PetscSectionClosurePermKey, PetscSectionClosurePermVal, PetscSectionClosurePermHash, PetscSectionClosurePermEqual, PetscSectionClosurePermVal_Empty)

     29: struct _p_PetscSection {
     30:   PETSCHEADER(int);
     31:   PetscInt                      pStart, pEnd; /* The chart: all points are contained in [pStart, pEnd) */
     32:   IS                            perm;         /* A permutation of [0, pEnd-pStart) */
     33:   PetscBool                     pointMajor;   /* True if the offsets are point major, otherwise they are fieldMajor */
     34:   PetscBool                     includesConstraints; /* True if constrained dofs are included when computing offsets */
     35:   PetscInt                     *atlasDof;     /* Describes layout of storage, point --> # of values */
     36:   PetscInt                     *atlasOff;     /* Describes layout of storage, point --> offset into storage */
     37:   PetscInt                      maxDof;       /* Maximum dof on any point */
     38:   PetscSection                  bc;           /* Describes constraints, point --> # local dofs which are constrained */
     39:   PetscInt                     *bcIndices;    /* Local indices for constrained dofs */
     40:   PetscBool                     setup;

     42:   PetscInt                      numFields;    /* The number of fields making up the degrees of freedom */
     43:   char                        **fieldNames;   /* The field names */
     44:   PetscInt                     *numFieldComponents; /* The number of components in each field */
     45:   PetscSection                 *field;        /* A section describing the layout and constraints for each field */
     46:   PetscBool                     useFieldOff;  /* Use the field offsets directly for the global section, rather than the point offset */
     47:   char                        ***compNames;   /* The component names */

     49:   PetscObject                   clObj;        /* Key for the closure (right now we only have one) */
     50:   PetscClPerm                   clHash;       /* Hash of (depth, size) to perm and invPerm */
     51:   PetscSection                  clSection;    /* Section giving the number of points in each closure */
     52:   IS                            clPoints;     /* Points in each closure */
     53:   PetscSectionSym               sym;          /* Symmetries of the data */
     54: };

     56: struct _PetscSectionSymOps {
     57:   PetscErrorCode (*getpoints)(PetscSectionSym,PetscSection,PetscInt,const PetscInt *,const PetscInt **,const PetscScalar **);
     58:   PetscErrorCode (*destroy)(PetscSectionSym);
     59:   PetscErrorCode (*view)(PetscSectionSym,PetscViewer);
     60: };

     62: typedef struct _n_SymWorkLink *SymWorkLink;

     64: struct _n_SymWorkLink
     65: {
     66:   SymWorkLink         next;
     67:   const PetscInt    **perms;
     68:   const PetscScalar **rots;
     69:   PetscInt           numPoints;
     70: };

     72: struct _p_PetscSectionSym {
     73:   PETSCHEADER(struct _PetscSectionSymOps);
     74:   void *data;
     75:   SymWorkLink workin;
     76:   SymWorkLink workout;
     77: };

     79: PETSC_EXTERN PetscErrorCode PetscSectionSetClosurePermutation_Internal(PetscSection, PetscObject, PetscInt, PetscInt, PetscCopyMode, PetscInt *);
     80: PETSC_EXTERN PetscErrorCode PetscSectionGetClosurePermutation_Internal(PetscSection, PetscObject, PetscInt, PetscInt, const PetscInt *[]);
     81: PETSC_EXTERN PetscErrorCode PetscSectionGetClosureInversePermutation_Internal(PetscSection, PetscObject, PetscInt, PetscInt, const PetscInt *[]);
     82: PETSC_EXTERN PetscErrorCode ISIntersect_Caching_Internal(IS, IS, IS *);
     83: #if defined(PETSC_HAVE_HDF5)
     84: PETSC_INTERN PetscErrorCode PetscSectionView_HDF5_Internal(PetscSection, PetscViewer);
     85: PETSC_INTERN PetscErrorCode PetscSectionLoad_HDF5_Internal(PetscSection, PetscViewer);
     86: #endif
     87: #endif