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MPI_Group_range_excl - Produces a group by excluding ranges of processes
from an existing group.
#include <mpi.h>
int MPI_Group_range_excl(MPI_Group group, int n, int ranges[][3],
MPI_Group *newgroup)
INCLUDE ’mpif.h’
MPI_GROUP_RANGE_EXCL(GROUP, N, RANGES, NEWGROUP, IERROR)
INTEGER GROUP, N, RANGES(3,*), NEWGROUP, IERROR
#include <mpi.h>
Group Group::Range_excl(int n, const int ranges[][3]) const
- group
- Group (handle).
- n
- Number of triplets in array ranges
(integer).
- ranges
- A one-dimensional array of integer triplets of the form
(first rank, last rank, stride), indicating the ranks in group of processes
to be excluded from the output group newgroup.
- newgroup
- New group derived from above, preserving the order in group (handle).
- IERROR
- Fortran only: Error status (integer).
Each computed rank must
be a valid rank in group and all computed ranks must be distinct, or else
the program is erroneous.
The functionality of this routine is specified
to be equivalent to expanding the array of ranges to an array of the excluded
ranks and passing the resulting array of ranks and other arguments to MPI_Group_excl.
A call to MPI_Group_excl is equivalent to a call to MPI_Group_range_excl
with each rank i in ranks replaced by the triplet (i,i,1) in the argument
ranges.
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.
MPI_Group_excl
MPI_Group_free
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