MPI_Dist_graph_create_adjacent(3)					MPI					 MPI_Dist_graph_create_adjacent(3)

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, int sources[], int sourceweights[],
					  int outdegree, int destinations[], 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 PARAMETER

       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

       dist_gr_create_adj.c

								     2/26/2011					 MPI_Dist_graph_create_adjacent(3)