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<A NAME="PetscCommGetNewTag"><H1>PetscCommGetNewTag</H1></A>
Gets a unique new tag from a PETSc communicator. All processors that share the communicator MUST call this routine EXACTLY the same number of times. This tag should only be used with the current objects communicator; do NOT use it with any other MPI communicator.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsys.h"
int PetscCommGetNewTag(MPI_Comm comm,int *tag)
</PRE>
Collective on <A HREF="../Sys/comm.html#comm">comm</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B><A HREF="../Sys/comm.html#comm">comm</A> </B> -the PETSc communicator
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>tag </B> -the new tag
<br>
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Sys/PetscObjectGetNewTag.html#PetscObjectGetNewTag">PetscObjectGetNewTag</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/src/objects/tagm.c.html#PetscCommGetNewTag">src/sys/src/objects/tagm.c</A>
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