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MPI_File_get_group - Returns a duplicate of the process group
of a file.
C Syntax
#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
- fh
- File handle (handle).
- group
- Group that
opened the file (handle).
- IERROR
- 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.
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