MPI_Group_rank(3) Open MPI MPI_Group_rank(3)
NAME
MPI_Group_rank - Returns the rank of the calling process in the given
group.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Group_rank(MPI_Group group, int *rank)
Fortran Syntax
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_GROUP_RANK(GROUP, RANK, IERROR)
INTEGER GROUP, RANK, IERROR
Fortran 2008 Syntax
USE mpi_f08
MPI_Group_rank(group, rank, ierror)
TYPE(MPI_Group), INTENT(IN) :: group
INTEGER, INTENT(OUT) :: rank
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
C++ Syntax
#include <mpi.h>
int Group::Get_rank() const
INPUT PARAMETERS
group Group (handle).
OUTPUT PARAMETERS
rank Rank of the calling process in group, or MPI_UNDEFINED if the
process is not a member (integer).
IERROR Fortran only: Error status (integer).
DESCRIPTION
MPI_Group_rank returns as the output parameter rank the rank of the
calling process in group. If the process is not a member of group then
MPI_UNDEFINED is returned.
ERRORS
Almost all MPI routines return an error value; C routines as the value
of the function and Fortran routines in the last argument. C++ func-
tions do not return errors. If the default error handler is set to
MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
will be used to throw an MPI::Exception object.
Before the error value is returned, the current MPI error handler is
called. By default, this error handler aborts the MPI job, except for
I/O function errors. The error handler may be changed with
MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
may be used to cause error values to be returned. Note that MPI does
not guarantee that an MPI program can continue past an error.
4.1.2 Nov 24, 2021 MPI_Group_rank(3)
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