petsc-3.8.4 2018-03-24

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.h90>

    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().

Examples