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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2006 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2006 University of Houston. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "ompi/group/group.h"
#include "ompi/constants.h"
#include "mpi.h"
/* define class information */
static void ompi_group_construct(ompi_group_t *);
static void ompi_group_destruct(ompi_group_t *);
OBJ_CLASS_INSTANCE(ompi_group_t,
opal_object_t,
ompi_group_construct,
ompi_group_destruct);
/*
* Table for Fortran <-> C group handle conversion
*/
ompi_pointer_array_t *ompi_group_f_to_c_table;
/*
* Predefined group objects
*/
ompi_group_t ompi_mpi_group_empty;
ompi_group_t ompi_mpi_group_null;
/*
* Allocate a new group structure
*/
ompi_group_t *ompi_group_allocate(int group_size)
{
/* local variables */
ompi_group_t * new_group = NULL;
assert (group_size >= 0);
/* create new group group element */
new_group = OBJ_NEW(ompi_group_t);
if (NULL == new_group)
goto error_exit;
if (OMPI_ERROR == new_group->grp_f_to_c_index) {
OBJ_RELEASE (new_group);
new_group = NULL;
goto error_exit;
}
/*
* Allocate array of (ompi_proc_t *)'s, one for each
* process in the group.
*/
new_group->grp_proc_pointers = (struct ompi_proc_t **)
malloc(sizeof(struct ompi_proc_t *) * group_size);
if (NULL == new_group->grp_proc_pointers) {
/* grp_proc_pointers allocation failed */
OBJ_RELEASE (new_group);
new_group = NULL;
goto error_exit;
}
/* set the group size */
new_group->grp_proc_count = group_size;
/* initialize our rank to MPI_UNDEFINED */
new_group->grp_my_rank = MPI_UNDEFINED;
error_exit:
/* return */
return new_group;
}
/*
* increment the reference count of the proc structures
*/
void ompi_group_increment_proc_count(ompi_group_t *group)
{
/* local variable */
int proc;
for (proc = 0; proc < group->grp_proc_count; proc++) {
OBJ_RETAIN(group->grp_proc_pointers[proc]);
}
/* return */
return;
}
/*
* decrement the reference count of the proc structures
*/
void ompi_group_decrement_proc_count(ompi_group_t *group)
{
/* local variable */
int proc;
for (proc = 0; proc < group->grp_proc_count; proc++) {
OBJ_RELEASE(group->grp_proc_pointers[proc]);
}
/* return */
return;
}
/*
* group constructor
*/
static void ompi_group_construct(ompi_group_t *new_group)
{
int ret_val;
/* Note that we do *NOT* increase the refcount on all the included
procs here because that is handled at a different level (e.g.,
the proc counts are not decreased during the desstructor,
either). */
/* assign entry in fortran <-> c translation array */
ret_val = ompi_pointer_array_add(ompi_group_f_to_c_table, new_group);
new_group->grp_f_to_c_index = ret_val;
new_group->grp_flags = 0;
/* return */
return;
}
/*
* group destructor
*/
static void ompi_group_destruct(ompi_group_t *group)
{
/* Note that we do *NOT* decrease the refcount on all the included
procs here because that is handled at a different level (e.g.,
the proc counts are not increased during the constructor,
either). */
/* release thegrp_proc_pointers memory */
if (NULL != group->grp_proc_pointers)
free(group->grp_proc_pointers);
/* reset the ompi_group_f_to_c_table entry - make sure that the
* entry is in the table */
if (NULL != ompi_pointer_array_get_item(ompi_group_f_to_c_table,
group->grp_f_to_c_index)) {
ompi_pointer_array_set_item(ompi_group_f_to_c_table,
group->grp_f_to_c_index, NULL);
}
/* return */
return;
}
/*
* Initialize OMPI group infrastructure
*/
int ompi_group_init(void)
{
/* initialize ompi_group_f_to_c_table */
ompi_group_f_to_c_table = OBJ_NEW(ompi_pointer_array_t);
/* add MPI_GROUP_NULL to table */
OBJ_CONSTRUCT(&ompi_mpi_group_null, ompi_group_t);
ompi_mpi_group_null.grp_proc_count = 0;
ompi_mpi_group_null.grp_my_rank = MPI_PROC_NULL;
ompi_mpi_group_null.grp_proc_pointers = NULL;
ompi_mpi_group_null.grp_flags |= OMPI_GROUP_INTRINSIC;
/* add MPI_GROUP_EMPTRY to table */
OBJ_CONSTRUCT(&ompi_mpi_group_empty, ompi_group_t);
ompi_mpi_group_empty.grp_proc_count = 0;
ompi_mpi_group_empty.grp_my_rank = MPI_UNDEFINED;
ompi_mpi_group_empty.grp_proc_pointers = NULL;
ompi_mpi_group_empty.grp_flags |= OMPI_GROUP_INTRINSIC;
return OMPI_SUCCESS;
}
/*
* Clean up group infrastructure
*/
int ompi_group_finalize(void)
{
ompi_mpi_group_null.grp_flags = 0;
OBJ_DESTRUCT(&ompi_mpi_group_null);
ompi_mpi_group_null.grp_flags = 0;
OBJ_DESTRUCT(&ompi_mpi_group_empty);
OBJ_RELEASE(ompi_group_f_to_c_table);
return OMPI_SUCCESS;
}
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