PetscDataType#

Used for handling different basic data types.

Synopsis#

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: Add PETSC_INT32 and remove use of improper PETSC_ENUM

See Also#

PetscBinaryRead(), PetscBinaryWrite(), PetscDataTypeToMPIDataType(), PetscDataTypeGetSize()

Level#

beginner

Location#

include/petscsystypes.h

Examples#

src/sys/tutorials/ex5.c.html
src/vec/vec/tutorials/ex6.c.html
src/vec/vec/tutorials/ex6f.F90.html
src/dm/tutorials/ex20.c.html
src/dm/tutorials/swarm_ex3.c.html
src/snes/tutorials/ex63.c.html


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