VecGetArrayReadF90#

Accesses a read only array from Fortran. 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

Input Parameter#

  • x - vector

Output Parameters#

  • xx_v - the Fortran 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)

Note#

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

See Also#

Vectors and Parallel Data, Vec, VecRestoreArrayReadF90(), VecGetArray(), VecRestoreArray(), VecGetArrayRead(), VecRestoreArrayRead(), VecGetArrayF90()

Level#

beginner

Location#

src/vec/vec/interface/rvector.c

Index of all Vec routines
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Index of all manual pages