PETSc version 3.17.4
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# PetscMPIInt

datatype used to represent 'int' parameters to MPI functions.

### Notes

usually this is the same as PetscInt, but if PETSc was built with --with-64-bit-indices but standard C/Fortran integers are 32 bit then this is NOT the same as PetscInt; it remains 32 bit.

PetscMPIIntCast(a,&b) checks if the given PetscInt a will fit in a PetscMPIInt, if not it generates a PETSC_ERR_ARG_OUTOFRANGE error.

### See Also

PetscBLASInt, PetscInt, PetscMPIIntCast()

### Level

intermediate

### Location

include/petscsystypes.h

### Examples

src/sys/classes/random/tutorials/ex2.c.html
src/sys/tutorials/ex3f90.F90.html
src/dm/impls/plex/tutorials/ex5.c.html
src/ksp/ksp/tutorials/ex73.c.html
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