BVGetArrayRead#
Returns a read-only pointer to a contiguous array that contains this processor’s portion of the BV data.
Synopsis#
#include "slepcbv.h"
PetscErrorCode BVGetArrayRead(BV bv,const PetscScalar **a)
Not Collective
Input Parameter#
bv - the basis vectors context
Output Parameter#
a - location to put pointer to the array
Notes#
BVRestoreArrayRead() must be called when access to the array is no
longer needed. This operation may imply a data copy, for BV types that
do not store data contiguously in memory.
The pointer will normally point to the first entry of the first column,
but if the BV has constraints then these go before the regular columns.
See Also#
BV: Basis Vectors, BVRestoreArray(), BVInsertConstraints(), BVGetLeadingDimension(), BVGetArray(), BVType
Level#
advanced
Location#
Implementations#
BVGetArrayRead_Contiguous() in src/sys/classes/bv/impls/contiguous/contig.c
BVGetArrayRead_Mat() in src/sys/classes/bv/impls/mat/bvmat.c
BVGetArrayRead_Svec() in src/sys/classes/bv/impls/svec/svec.c
BVGetArrayRead_Vecs() in src/sys/classes/bv/impls/vecs/vecs.c
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