Translates the ranks of processes in one group to those in another group


#include "mpi.h"
int MPI_Group_translate_ranks ( group_a, n, ranks_a, group_b, ranks_b )
MPI_Group group_a;
int n;
int       *ranks_a;
MPI_Group  group_b;
int       *ranks_b;

Input Parameters

group1 group1 (handle)
n number of ranks in ranks1 and ranks2 arrays (integer)
ranks1 array of zero or more valid ranks in group1
group2 group2 (handle)

Output Parameter

array of corresponding ranks in group2, MPI_UNDEFINED when no correspondence exists.

Notes for Fortran

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

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


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 lastargument. Before the value is returned, the current MPI error handler iscalled. By default, this error handler aborts the MPI job. The error handlermay be changed with MPI_Errhandler_set; the predefined error handlerMPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue pastan error.

No error; MPI routine completed successfully.
Null group passed to function.
Invalid argument. Some argument is invalid and is not identified by a specific error class (e.g., MPI_ERR_RANK).
Invalid source or destination rank. Ranks must be between zero and the size of the communicator minus one; ranks in a receive (MPI_Recv, MPI_Irecv, MPI_Sendrecv, etc.) may also be MPI_ANY_SOURCE.