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<TITLE>PetscObjectGetComm</TITLE>
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<A NAME="PetscObjectGetComm"><H1>PetscObjectGetComm</H1></A>
Gets the MPI communicator for any <A HREF="../Sys/PetscObject.html#PetscObject">PetscObject</A>,  regardless of the type. 
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petsc.h"    
int PetscObjectGetComm(PetscObject obj,MPI_Comm *comm)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>obj </B> -any PETSc object, for example a <A HREF="../Vec/Vec.html#Vec">Vec</A>, <A HREF="../Mat/Mat.html#Mat">Mat</A> or <A HREF="../KSP/KSP.html#KSP">KSP</A>. Thus must be
cast with a (<A HREF="../Sys/PetscObject.html#PetscObject">PetscObject</A>), for example, 
<A HREF="../Sys/PetscObjectGetComm.html#PetscObjectGetComm">PetscObjectGetComm</A>((<A HREF="../Sys/PetscObject.html#PetscObject">PetscObject</A>)mat,&amp;<A HREF="../Sys/comm.html#comm">comm</A>);
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B><A HREF="../Sys/comm.html#comm">comm</A> </B> -the MPI communicator
<br>
<P>

<P>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/src/objects/gcomm.c.html#PetscObjectGetComm">src/sys/src/objects/gcomm.c</A>
<BR><A HREF="./index.html">Index of all Sys routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/snes/examples/tutorials/ex5.c.html">src/snes/examples/tutorials/ex5.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/util2.c.html">src/ts/examples/tutorials/util2.c.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex7.c.html">src/ts/examples/tutorials/ex7.c.html</A><BR>
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