petsc-3.7.2 2016-06-05
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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