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<A NAME="PetscLayoutReference"><H1>PetscLayoutReference</H1></A>
Causes a PETSc <A HREF="../Vec/Vec.html#Vec">Vec</A> or <A HREF="../Mat/Mat.html#Mat">Mat</A> to share a <A HREF="../Vec/PetscLayout.html#PetscLayout">PetscLayout</A> with one that already exists. Used by <A HREF="../Vec/Vec.html#Vec">Vec</A>/MatDuplicate_XXX()
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscvec.h"
PetscErrorCode PetscLayoutReference(PetscLayout in,PetscLayout *out)
</PRE>
Collective on <A HREF="../Vec/PetscLayout.html#PetscLayout">PetscLayout</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>in </B> -input <A HREF="../Vec/PetscLayout.html#PetscLayout">PetscLayout</A> to be copied
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>out </B> -the reference location
<br>
<P>
<P>
Notes: <A HREF="../Vec/PetscLayoutSetUp.html#PetscLayoutSetUp">PetscLayoutSetUp</A>() does not need to be called on the resulting <A HREF="../Vec/PetscLayout.html#PetscLayout">PetscLayout</A>
<P>
If the out location already contains a <A HREF="../Vec/PetscLayout.html#PetscLayout">PetscLayout</A> it is destroyed
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Vec/PetscLayoutCreate.html#PetscLayoutCreate">PetscLayoutCreate</A>(), <A HREF="../Vec/PetscLayoutDestroy.html#PetscLayoutDestroy">PetscLayoutDestroy</A>(), <A HREF="../Vec/PetscLayoutSetUp.html#PetscLayoutSetUp">PetscLayoutSetUp</A>(), <A HREF="../Vec/PetscLayoutCopy.html#PetscLayoutCopy">PetscLayoutCopy</A>()
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/vec/impls/mpi/pmap.c.html#PetscLayoutReference">src/vec/vec/impls/mpi/pmap.c</A>
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