[petsc-users] Do I need to VecRestoreArray after VecGetArray if nothing's modified?

[Jed Brown]

On Mon, Oct 10, 2011 at 08:16, Dominik Szczerba <dominik at itis.ethz.ch>wrote:

> If only read from a pointer obtained via VecGetArray, but not modify
> any values, is VecRestoreArray still mandatory?
>

Yes. Note that you can use VecGetArrayRead() if you only want const access.
(You still restore, but cached norms remain valid.)
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