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MPI_Cart_map(3)			      MPI		       MPI_Cart_map(3)

NAME
       MPI_Cart_map -  Maps process to Cartesian topology information

SYNOPSIS
       int MPI_Cart_map(MPI_Comm comm_old, int ndims, MPICH2_CONST int *dims, MPICH2_CONST int *periods,
		       int *newrank)

INPUT PARAMETERS
       comm   -	input communicator (handle)
       ndims  -	number of dimensions of	Cartesian structure (integer)
       dims   -	integer	array of size ndims specifying the number of processes
	      in each coordinate direction
       periods
	      -	logical	array of size ndims specifying the periodicity	speci-
	      fication in each coordinate direction

OUTPUT PARAMETER
       newrank
	      -	 reordered rank	of the calling process;	MPI_UNDEFINED if call-
	      ing process does not belong to grid (integer)

THREAD AND INTERRUPT SAFETY
       This routine is both thread- and	interrupt-safe.	 This means that  this
       routine may safely be used by multiple threads and from within a	signal
       handler.

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.
       MPI_ERR_COMM
	      -	Invalid	communicator.  A common	error is to use	a null	commu-
	      nicator in a call	(not even allowed in MPI_Comm_rank ).
       MPI_ERR_DIMS
	      -	 Invalid  dimension argument.  A dimension argument is null or
	      its length is less than or equal to zero.
       MPI_ERR_ARG
	      -	Invalid	argument.  Some	argument is invalid and	is not identi-
	      fied by a	specific error class (e.g., MPI_ERR_RANK ).

LOCATION
       src/mpi/topo/cart_map.c

				   9/20/2012		       MPI_Cart_map(3)

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

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