petsc-3.12.5 2020-03-29
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ISRestoreIndices

 Restores an index set to a usable state after a call to ISGetIndices().

Synopsis

#include "petscis.h" 
PetscErrorCode  ISRestoreIndices(IS is,const PetscInt *ptr[])
Not Collective

Input Parameters

is - the index set
ptr - the pointer obtained by ISGetIndices()

Fortran Note

This routine is used differently from Fortran 
   IS          is

   integer     is_array(1)

   PetscOffset i_is

   int         ierr

      call ISGetIndices(is,is_array,i_is,ierr)



  Access first local entry in list



     value = is_array(i_is + 1)





     ...... other code



      call ISRestoreIndices(is,is_array,i_is,ierr)




See the Fortran chapter of the users manual and
petsc/src/is/examples/[tutorials,tests] for details.






Note

This routine zeros out ptr. This is to prevent accidental us of the array after it has been restored.



See Also

 ISGetIndices(), ISRestoreIndicesF90()

Level
intermediate


Location

src/vec/is/is/interface/index.c

Examples

src/vec/vec/utils/tagger/examples/tutorials/ex1.c.html

src/vec/is/is/examples/tutorials/ex1.c.html

src/vec/is/is/examples/tutorials/ex2.c.html

src/vec/is/is/examples/tutorials/ex3.c.html

src/vec/is/is/examples/tutorials/ex1f.F.html

src/vec/is/is/examples/tutorials/ex2f.F.html

src/dm/examples/tutorials/swarm_ex3.c.html

src/ksp/ksp/examples/tutorials/ex71.c.html

src/ksp/ksp/examples/tutorials/ex76.c.html

src/snes/examples/tutorials/ex56.c.html

src/snes/examples/tutorials/ex77.c.html


Implementations
ISRestoreIndices_Block in src/vec/is/is/impls/block/block.c

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

ISRestoreIndices_Stride in src/vec/is/is/impls/stride/stride.c


Index of all IS routines

Table of Contents for all manual pages

Index of all manual pages