17.2.188. MPI_Group_from_session_pset

MPI_Group_from_session_pset - Creates a group using a provided session handle and process set. Syntax C Syntax

#include <mpi.h>

int MPI_Group_from_session_pset(MPI_Session session, const char *pset_name, MPI_Group *newgroup) Fortran Syntax

! or the older form: INCLUDE 'mpif.h'

    CHARACTER*(*) PSET_NAME Fortran 2008 Syntax

USE mpi_f08

MPI_Group_from_session_pset(session, pset_name, newgroup, ierror)
    TYPE(MPI_Session), INTENT(IN) :: session
    CHARACTER(LEN=*), INTENT(IN) :: pset_name
    TYPE(MPI_Group), INTENT(OUT) :: newgroup
    INTEGER, OPTIONAL, INTENT(OUT) :: ierror Input Parameters

  • session : Session (handle).

  • pset_name : name of process set to use to create the new group (string) Output Parameters

  • newgroup : New group derived from supplied session and process set (handle).

  • IERROR : Fortran only: Error status (integer). Description

The function MPI_Group_from_session_pset creates a group newgroup using the provided session handle and process set. The process set name must be one returned from an invocation of MPI_Session_get_nth_pset using the supplied session handle. If the pset_name does not exist, MPI_GROUP_NULL will be returned in the newgroup argument. Note

As with other group constructors, MPI_Group_from_session_pset is a local function. Errors

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument.

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_Session_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.

See also