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MPI_Dist_graph_neighbors(3)	      MPI	   MPI_Dist_graph_neighbors(3)

NAME
       MPI_Dist_graph_neighbors	 -   Provides adjacency	information for	a dis-
       tributed	graph topology.

SYNOPSIS
       int MPI_Dist_graph_neighbors(MPI_Comm comm,
				    int	maxindegree, int sources[], int	sourceweights[],
				    int	maxoutdegree, int destinations[], int destweights[])

INPUT PARAMETERS
       comm   -	communicator with distributed graph topology (handle)
       maxindegree
	      -	size of	sources	and sourceweights arrays  (non-negative	 inte-
	      ger)
       maxoutdegree
	      -	 size of destinations and destweights arrays (non-negative in-
	      teger)

OUTPUT PARAMETER
       sources
	      -	processes for which the	calling	process	is a destination  (ar-
	      ray of non-negative integers)
       sourceweights
	      -	 weights  of the edges into the	calling	process	(array of non-
	      negative integers)
       destinations
	      -	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)

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 com-
       municators),  MPI_File_set_errhandler  (for files), and MPI_Win_set_er-
       rhandler	(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	 when-
       ever possible.

       MPI_SUCCESS
	      -	No error; MPI routine completed	successfully.

LOCATION
       src/mpi/topo/dist_gr_neighb.c

				   9/20/2012	   MPI_Dist_graph_neighbors(3)

NAME | SYNOPSIS | INPUT PARAMETERS | OUTPUT PARAMETER | THREAD AND INTERRUPT SAFETY | NOTES FOR FORTRAN | ERRORS | LOCATION

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