MPI_Group_rank − Returns the rank of the calling process in the given group.
#include
<mpi.h>
int MPI_Group_rank(MPI_Group group, int
*rank)
USE MPI
! or the older form: INCLUDE ’mpif.h’
MPI_GROUP_RANK(GROUP, RANK, IERROR)
INTEGER |
GROUP, RANK, IERROR |
USE mpi_f08
MPI_Group_rank(group, rank, ierror)
TYPE(MPI_Group), INTENT(IN) :: group | |
INTEGER, INTENT(OUT) :: rank | |
INTEGER, OPTIONAL, INTENT(OUT) :: ierror |
group |
Group (handle). |
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). |
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.
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions 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.