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NAME

       MPI_Dist_graph_create_adjacent   -    returns   a   handle   to  a  new
       communicator to which the distributed  graph  topology  information  is
       attached.

SYNOPSIS

       int MPI_Dist_graph_create_adjacent(MPI_Comm comm_old,
                                          int indegree, const int sources[],
                                          const int sourceweights[],
                                          int outdegree, const int destinations[],
                                          const int destweights[],
                                          MPI_Info info, int reorder, MPI_Comm *comm_dist_graph)

INPUT PARAMETERS

       comm_old
              - input communicator (handle)
       indegree
              -   size  of  sources  and  sourceweights  arrays  (non-negative
              integer)
       sources
              - ranks  of  processes  for  which  the  calling  process  is  a
              destination (array of non-negative integers)
       sourceweights
              -  weights  of the edges into the calling process (array of non-
              negative integers or MPI_UNWEIGHTED)
       outdegree
              - size of  destinations  and  destweights  arrays  (non-negative
              integer)
       destinations
              -  ranks  of processes for which the calling process is a source
              (array of non-negative integers)
       destweights
              - weights of the edges out of the calling process (array of non-
              negative integers or MPI_UNWEIGHTED)
       info   - hints on optimization and interpretation of weights (handle)
       reorder
              - the ranks may be reordered (true) or not (false) (logical)

OUTPUT PARAMETERS

       comm_dist_graph
              - communicator with distributed graph topology (handle)

THREAD AND INTERRUPT SAFETY

       This  routine  is  thread-safe.   This  means  that this routine may be
       safely used by multiple threads without the need for any  user-provided
       thread  locks.  However, the routine is not interrupt safe.  Typically,
       this is due to the use of memory allocation routines such as malloc  or
       other  non-MPICH  runtime  routines  that are themselves not interrupt-
       safe.

NOTES FOR FORTRAN

       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK )  have
       an  additional  argument ierr at the end of the argument list.  ierr is
       an integer and has the same meaning as the return value of the  routine
       in  C.   In Fortran, MPI routines are subroutines, and are invoked with
       the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in
       Fortran.

ERRORS

       All  MPI  routines  (except  MPI_Wtime  and MPI_Wtick ) return an error
       value; C routines as the value of the function and Fortran routines  in
       the last argument.  Before the value is returned, the current MPI error
       handler is called.  By default, this error handler aborts the MPI  job.
       The  error  handler  may  be  changed with MPI_Comm_set_errhandler (for
       communicators),    MPI_File_set_errhandler     (for     files),     and
       MPI_Win_set_errhandler   (for   RMA   windows).    The   MPI-1  routine
       MPI_Errhandler_set  may  be  used  but  its  use  is  deprecated.   The
       predefined  error  handler MPI_ERRORS_RETURN may be used to cause error
       values to be returned.  Note that MPI does not guarentee  that  an  MPI
       program  can  continue past an error; however, MPI implementations will
       attempt to continue whenever possible.

       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_ARG
              - Invalid  argument.   Some  argument  is  invalid  and  is  not
              identified by a specific error class (e.g., MPI_ERR_RANK ).
       MPI_ERR_OTHER
              -  Other  error;  use  MPI_Error_string  to get more information
              about this error code.

LOCATION

       /tmp/gyCYfBi4J6/mpich-3.1/src/mpi/topo/dist_gr_create_adj.c

                                   2/20/2014 MPI_Dist_graph_create_adjacent(3)



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