petsc-3.14.6 2021-03-30
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VecGetArrayReadF90

 Accesses a read only array from Fortran90. For default PETSc vectors, VecGetArrayF90() returns a pointer to the local data array. Otherwise, this routine is implementation dependent. You MUST call VecRestoreArrayReadF90() when you no longer need access to the array.

Synopsis

VecGetArrayReadF90(Vec x,{Scalar, pointer :: xx_v(:)},integer ierr)
Logically Collective on Vec

Input Parameter

x - vector

Output Parameters

xx_v - the Fortran90 pointer to the array
ierr - error code

Example of Usage

#include <petsc/finclude/petscvec.h>
    use petscvec

    PetscScalar, pointer :: xx_v(:)
    ....
    call VecGetArrayReadF90(x,xx_v,ierr)
    a = xx_v(3)
    call VecRestoreArrayReadF90(x,xx_v,ierr)

If you intend to write entries into the array you must use VecGetArrayF90().

See Also

VecRestoreArrayReadF90(), VecGetArray(), VecRestoreArray(), VecGetArrayRead(), VecRestoreArrayRead(), VecGetArrayF90(), UsingFortran

Level

beginner

Location

src/vec/vec/interface/rvector.c

Examples

src/snes/tutorials/ex73f90t.F90.html

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