petsc-3.10.5 2019-03-28
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PetscLayoutCreate

 Allocates PetscLayout space and sets the map contents to the default.

Synopsis

#include "petscis.h" 
PetscErrorCode PetscLayoutCreate(MPI_Comm comm,PetscLayout *map)
Collective on MPI_Comm

Input Parameters

comm - the MPI communicator
map - pointer to the map

Notes

Typical calling sequence 
       PetscLayoutCreate(MPI_Comm,PetscLayout *);
       PetscLayoutSetBlockSize(PetscLayout,1);
       PetscLayoutSetSize(PetscLayout,N) // or PetscLayoutSetLocalSize(PetscLayout,n);
       PetscLayoutSetUp(PetscLayout);

Optionally use any of the following

PetscLayoutGetSize(PetscLayout,PetscInt *);- . PetscLayoutGetLocalSize(PetscLayout,PetscInt *);
PetscLayoutGetRange(PetscLayout,PetscInt *rstart,PetscInt *rend);- . PetscLayoutGetRanges(PetscLayout,const PetscInt *range[]);
PetscLayoutDestroy(PetscLayout*);- The PetscLayout object and methods are intended to be used in the PETSc Vec and Mat implementions; it is often not needed in user codes unless you really gain something in their use.

See Also

PetscLayoutSetLocalSize(), PetscLayoutSetSize(), PetscLayoutGetSize(), PetscLayoutGetLocalSize(), PetscLayout, PetscLayoutDestroy(),
PetscLayoutGetRange(), PetscLayoutGetRanges(), PetscLayoutSetBlockSize(), PetscLayoutGetBlockSize(), PetscLayoutSetUp()

Level

advanced

Location

src/vec/is/utils/pmap.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages