petsc-3.7.3 2016-07-24
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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
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Index of all manual pages