1: #if !defined(PETSCISTYPES_H) 2:#define PETSCISTYPES_H4: /*S 5: IS - Abstract PETSc object that allows indexing. 7: Level: beginner 9: .seealso: ISCreateGeneral(), ISCreateBlock(), ISCreateStride(), ISGetIndices(), ISDestroy() 10: S*/ 11: typedef struct _p_IS* IS; 13: /*S 14: ISLocalToGlobalMapping - mappings from an arbitrary 15: local ordering from 0 to n-1 to a global PETSc ordering 16: used by a vector or matrix. 18: Level: intermediate 20: Note: mapping from Local to Global is scalable; but Global 21: to Local may not be if the range of global values represented locally 22: is very large. 24: Note: the ISLocalToGlobalMapping is actually a private object; it is included 25: here for the inline function ISLocalToGlobalMappingApply() to allow it to be inlined since 26: it is used so often. 28: .seealso: ISLocalToGlobalMappingCreate() 29: S*/ 30: typedef struct _p_ISLocalToGlobalMapping* ISLocalToGlobalMapping; 32: /*S 33: ISColoring - sets of IS's that define a coloring 34: of the underlying indices 36: Level: intermediate 38: Notes: 39: One should not access the *is records below directly because they may not yet 40: have been created. One should use ISColoringGetIS() to make sure they are 41: created when needed. 43: Developer Note: this is not a PetscObject 45: .seealso: ISColoringCreate(), ISColoringGetIS(), ISColoringView(), ISColoringGetIS() 46: S*/ 47: typedef struct _n_ISColoring* ISColoring; 49: /*S 50: PetscLayout - defines layout of vectors and matrices across processes (which rows are owned by which processes) 52: Level: developer 55: .seealso: PetscLayoutCreate(), PetscLayoutDestroy() 56: S*/ 57: typedef struct _n_PetscLayout* PetscLayout; 59: /*S 60: PetscSection - Mapping from integers in a designated range to contiguous sets of integers. 62: In contrast to IS, which maps from integers to single integers, the range of a PetscSection is in the space of 63: contiguous sets of integers. These ranges are frequently interpreted as domains of other array-like objects, 64: especially other PetscSections, Vecs, and ISs. The domain is set with PetscSectionSetChart() and does not need to 65: start at 0. For each point in the domain of a PetscSection, the output set is represented through an offset and a 66: count, which are set using PetscSectionSetOffset() and PetscSectionSetDof() respectively. Lookup is typically using 67: accessors or routines like VecGetValuesSection(). 69: Level: developer 71: .seealso: PetscSectionCreate(), PetscSectionDestroy() 72: S*/ 73: typedef struct _p_PetscSection *PetscSection; 75: /*S 76: PetscSectionSym - Symmetries of the data referenced by a PetscSection. 78: Often the order of data index by a PetscSection is meaningful, and describes additional structure, such as points on a 79: line, grid, or lattice. If the data is accessed from a different "orientation", then the image of the data under 80: access then undergoes a symmetry transformation. A PetscSectionSym specifies these symmetries. The types of 81: symmetries that can be specified are of the form R * P, where R is a diagonal matrix of scalars, and P is a permutation. 83: Level: developer 85: .seealso: PetscSectionSymCreate(), PetscSectionSymDestroy(), PetscSectionSetSym(), PetscSectionGetSym(), PetscSectionSetFieldSym(), PetscSectionGetFieldSym(), PetscSectionGetSymPoints() 86: S*/ 87: typedef struct _p_PetscSectionSym *PetscSectionSym; 89: #endif