mpi
Class Group

java.lang.Object
  |
  +--mpi.Group

public class Group

extends java.lang.Object

Field Summary

protected static int	EMPTY
protected long	handle

Constructor Summary

protected	Group(int Type)
protected	Group(long _handle)

Method Summary

static int	Compare(Group group1, Group group2) Compare two groups.
static Group	Difference(Group group1, Group group2) Result contains all elements of the first group that are not in the second group.
Group	Excl(int[] ranks) Create a subset group excluding specified processes.
void	finalize() Destructor.
Group	Incl(int[] ranks) Create a subset group including specified processes.
static Group	Intersection(Group group1, Group group2) Set intersection of two groups.
Group	Range_excl(int[][] ranges) Create a subset group excluding processes specified by strided intervals of ranks.
Group	Range_incl(int[][] ranges) Create a subset group including processes specified by strided intervals of ranks.
int	Rank() Rank of this process in group.
int	Size() Size of group.
static int[]	Translate_ranks(Group group1, int[] ranks1, Group group2) Translate ranks within one group to ranks within another.
static Group	Union(Group group1, Group group2) Set union of two groups.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EMPTY

protected static final int EMPTY

handle

protected long handle

Constructor Detail

Group

protected Group(int Type)

Group

protected Group(long _handle)

Method Detail

Size

public int Size()
         throws MPIException

Size of group.

returns:

number of processors in the group

Java binding of the MPI operation MPI_GROUP_SIZE.

Rank

public int Rank()
         throws MPIException

Rank of this process in group.

returns:

rank of the calling process in the group

Java binding of the MPI operation MPI_GROUP_RANK. Result value is MPI.UNDEFINED if this process is not a member of the group.

finalize

public void finalize()

Destructor.

Java binding of the MPI operation MPI_GROUP_FREE.

Overrides:

finalize in class java.lang.Object

Translate_ranks

public static int[] Translate_ranks(Group group1,
                                    int[] ranks1,
                                    Group group2)
                             throws MPIException

Translate ranks within one group to ranks within another.

group1	a group
ranks1	array of valid ranks in group1
group2	another group
returns:	array of corresponding ranks in group2

Java binding of the MPI operation MPI_GROUP_TRANSLATE_RANKS.

Result elements are MPI.UNDEFINED where no correspondence exists.

Compare

public static int Compare(Group group1,
                          Group group2)
                   throws MPIException

Compare two groups.

group1	first group
group2	second group
returns:	result

Java binding of the MPI operation MPI_GROUP_COMPARE.

MPI.IDENT results if the group members and group order are exactly the same in both groups. MPI.SIMILAR results if the group members are the same but the order is different. MPI.UNEQUAL results otherwise.

Union

public static Group Union(Group group1,
                          Group group2)
                   throws MPIException

Set union of two groups.

group1	first group
group2	second group
returns:	union group

Java binding of the MPI operation MPI_GROUP_UNION.

Intersection

public static Group Intersection(Group group1,
                                 Group group2)
                          throws MPIException

Set intersection of two groups.

group1	first group
group2	second group
returns:	intersection group

Java binding of the MPI operation MPI_GROUP_INTERSECTION.

Difference

public static Group Difference(Group group1,
                               Group group2)
                        throws MPIException

Result contains all elements of the first group that are not in the second group.

group1	first group
group2	second group
returns:	difference group

Java binding of the MPI operation MPI_GROUP_DIFFERENCE.

Incl

public Group Incl(int[] ranks)
           throws MPIException

Create a subset group including specified processes.

ranks	ranks from this group to appear in new group
returns:	new group

Java binding of the MPI operation MPI_GROUP_INCL.

Excl

public Group Excl(int[] ranks)
           throws MPIException

Create a subset group excluding specified processes.

ranks	ranks from this group not to appear in new group
returns:	new group

Java binding of the MPI operation MPI_GROUP_EXCL.

Range_incl

public Group Range_incl(int[][] ranges)
                 throws MPIException

Create a subset group including processes specified by strided intervals of ranks.

ranges	array of integer triplets
returns:	new group

Java binding of the MPI operation MPI_GROUP_RANGE_INCL.

The triplets are of the form (first rank, last rank, stride) indicating ranks in this group to be included in the new group. The size of the first dimension of ranges is the number of triplets. The size of the second dimension is 3.

Range_excl

public Group Range_excl(int[][] ranges)
                 throws MPIException

Create a subset group excluding processes specified by strided intervals of ranks.

ranges	array of integer triplets
returns:	new group

Java binding of the MPI operation MPI_GROUP_RANGE_EXCL.

Triplet array is defined as for Range_incl, the ranges indicating ranks in this group to be excluded from the new group.