MPI_File_get_group(3) Open MPI MPI_File_get_group(3)

MPI_File_get_group - Returns a duplicate of the process group of a file.

#include <mpi.h>
int MPI_File_get_group(MPI_File fh, MPI_Group *group)

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_FILE_GET_GROUP(FH, GROUP, IERROR)
	INTEGER	FH, GROUP, IERROR

USE mpi_f08
MPI_File_get_group(fh, group, ierror)
	TYPE(MPI_File), INTENT(IN) :: fh
	TYPE(MPI_Group), INTENT(OUT) :: group
	INTEGER, OPTIONAL, INTENT(OUT) :: ierror

#include <mpi.h>
MPI::Group MPI::File::Get_group() const

File handle (handle).

Group that opened the file (handle).
Fortran only: Error status (integer).

MPI_File_get_group returns a duplicate of the group of the communicator used to open the file associated with fh. The group is returned in group. The user is responsible for freeing group, using MPI_Group_free.

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. For MPI I/O function errors, the default error handler is set to MPI_ERRORS_RETURN. The error handler may be changed with MPI_File_set_errhandler; the predefined error handler MPI_ERRORS_ARE_FATAL may be used to make I/O errors fatal. Note that MPI does not guarantee that an MPI program can continue past an error.

May 26, 2022 4.1.4