[petsc-dev] Removing VecGetArrayPrivate3

[Jed Brown]

I thought the purpose of this function was to avoid calling VecGetArray
multiple times on identical arguments.  In particular, consider a Vec
implementation that was not backed by a contiguous array.  Must these
implementations keep a reference count of how many times the same array was
checked out?  This violates the present API implied by VecGetArray_Seq:

if (vin->array_gotten) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ORDER,"Array has
already been gotten for this vector,you may\nhave forgotten a call to
VecRestoreArray()");

Do you want to relax this restriction on the API (placing extra burden on
the implementation), or revert the patch?

Jed
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