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<TITLE>ISLocalToGlobalMappingGetBlockInfo</TITLE>
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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.7.5 v3.7.5 docs/manualpages/IS/ISLocalToGlobalMappingGetBlockInfo.html "><small>Report Typos and Errors</small></a></div>
<A NAME="ISLocalToGlobalMappingGetBlockInfo"><H1>ISLocalToGlobalMappingGetBlockInfo</H1></A>
Gets the neighbor information for each processor and each index shared by more than one processor
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscis.h"
PetscErrorCode ISLocalToGlobalMappingGetBlockInfo(ISLocalToGlobalMapping mapping,PetscInt *nproc,PetscInt *procs[],PetscInt *numprocs[],PetscInt **indices[])
</PRE>
Collective on <A HREF="../IS/ISLocalToGlobalMapping.html#ISLocalToGlobalMapping">ISLocalToGlobalMapping</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<DT><B>mapping </B> -the mapping from local to global indexing
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nproc </B></TD><TD>- number of processors that are connected to this one
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>proc </B></TD><TD>- neighboring processors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>numproc </B></TD><TD>- number of indices for each subdomain (processor)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>indices </B></TD><TD>- indices of nodes (in local numbering) shared with neighbors (sorted by global numbering)
</TD></TR></TABLE>
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">Fortran Usage</FONT></H3>
<pre>
ISLocalToGlobalMpngGetInfoSize(<A HREF="../IS/ISLocalToGlobalMapping.html#ISLocalToGlobalMapping">ISLocalToGlobalMapping</A>,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nproc,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> numprocmax,ierr) followed by
</pre>
<pre>
<A HREF="../IS/ISLocalToGlobalMappingGetInfo.html#ISLocalToGlobalMappingGetInfo">ISLocalToGlobalMappingGetInfo</A>(<A HREF="../IS/ISLocalToGlobalMapping.html#ISLocalToGlobalMapping">ISLocalToGlobalMapping</A>,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nproc, <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> procs[nproc],<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> numprocs[nproc],
</pre>
<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> indices[nproc][numprocmax],ierr)
There is no <A HREF="../IS/ISLocalToGlobalMappingRestoreInfo.html#ISLocalToGlobalMappingRestoreInfo">ISLocalToGlobalMappingRestoreInfo</A>() in Fortran. You must make sure that procs[], numprocs[] and
indices[][] are large enough arrays, either by allocating them dynamically or defining static ones large enough.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../IS/ISLocalToGlobalMappingDestroy.html#ISLocalToGlobalMappingDestroy">ISLocalToGlobalMappingDestroy</A>(), <A HREF="../IS/ISLocalToGlobalMappingCreateIS.html#ISLocalToGlobalMappingCreateIS">ISLocalToGlobalMappingCreateIS</A>(), <A HREF="../IS/ISLocalToGlobalMappingCreate.html#ISLocalToGlobalMappingCreate">ISLocalToGlobalMappingCreate</A>(),
<BR><A HREF="../IS/ISLocalToGlobalMappingRestoreInfo.html#ISLocalToGlobalMappingRestoreInfo">ISLocalToGlobalMappingRestoreInfo</A>()
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/is/utils/isltog.c.html#ISLocalToGlobalMappingGetBlockInfo">src/vec/is/utils/isltog.c</A>
<BR><A HREF="./index.html">Index of all IS routines</A>
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