PetscDataType#

Used for handling different basic data types.

Synopsis#

typedef enum {
  PETSC_DATATYPE_UNKNOWN = 0,
  PETSC_DOUBLE           = 1,
  PETSC_COMPLEX          = 2,
  PETSC_LONG             = 3,
  PETSC_SHORT            = 4,
  PETSC_FLOAT            = 5,
  PETSC_CHAR             = 6,
  PETSC_BIT_LOGICAL      = 7,
  PETSC_ENUM             = 8,
  PETSC_BOOL             = 9,
  PETSC___FLOAT128       = 10,
  PETSC_OBJECT           = 11,
  PETSC_FUNCTION         = 12,
  PETSC_STRING           = 13,
  PETSC___FP16           = 14,
  PETSC_STRUCT           = 15,
  PETSC_INT              = 16,
  PETSC_INT64            = 17,
  PETSC_COUNT            = 18,
  PETSC_INT32            = 19,
} PetscDataType;

Notes#

Use of this should be avoided if one can directly use MPI_Datatype instead.

PETSC_INT is the datatype for a PetscInt, regardless of whether it is 4 or 8 bytes. PETSC_REAL, PETSC_COMPLEX and PETSC_SCALAR are the datatypes for PetscReal, PetscComplex and PetscScalar, regardless of their sizes.

Developer Notes#

It would be nice if we could always just use MPI Datatypes, why can we not?

If you change any values in PetscDatatype make sure you update their usage in share/petsc/matlab/PetscBagRead.m and share/petsc/matlab/@PetscOpenSocket/read/write.m

TODO#

Remove use of improper PETSC_ENUM

Level#

beginner

Location#

include/petscsystypes.h

Examples#

src/dm/field/tutorials/ex1.c
src/sys/tutorials/ex5.c
src/dm/impls/swarm/tutorials/ex1.c

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