petsc-3.14.6 2021-03-30
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ISCreateGeneral

 Creates a data structure for an index set containing a list of integers.

Synopsis

#include "petscis.h"  
PetscErrorCode  ISCreateGeneral(MPI_Comm comm,PetscInt n,const PetscInt idx[],PetscCopyMode mode,IS *is)
Collective

Input Parameters

comm - the MPI communicator
n - the length of the index set
idx - the list of integers
mode - PETSC_COPY_VALUES, PETSC_OWN_POINTER, or PETSC_USE_POINTER; see PetscCopyMode for meaning of this flag.

Output Parameter

is - the new index set

Notes

When the communicator is not MPI_COMM_SELF, the operations on IS are NOT conceptually the same as MPI_Group operations. The IS are then distributed sets of indices and thus certain operations on them are collective.

See Also

ISCreateStride(), ISCreateBlock(), ISAllGather(), PETSC_COPY_VALUES, PETSC_OWN_POINTER, PETSC_USE_POINTER, PetscCopyMode

Level

beginner

Location

src/vec/is/is/impls/general/general.c

Examples

src/vec/is/is/tutorials/ex1.c.html
src/vec/is/is/tutorials/ex1f.F.html
src/vec/is/is/tutorials/ex1f90.F90.html
src/dm/tutorials/ex6.c.html
src/dm/tutorials/swarm_ex3.c.html
src/dm/field/tutorials/ex1.c.html
src/ksp/ksp/tutorials/ex49.c.html
src/ksp/ksp/tutorials/ex59.c.html
src/ksp/ksp/tutorials/ex71.c.html

Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages