114 строки
3.5 KiB
C
114 строки
3.5 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "orte_config.h"
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#include "orte/orte_constants.h"
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#include "opal/mca/mca.h"
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#include "opal/mca/base/base.h"
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#include "orte/mca/errmgr/errmgr.h"
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#include "orte/mca/odls/base/base.h"
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/**
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* Function for selecting one component from all those that are
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* available.
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*/
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int orte_odls_base_select(void)
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{
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opal_list_item_t *item;
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mca_base_component_list_item_t *cli;
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orte_odls_base_component_t *component, *best_component = NULL;
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orte_odls_base_module_t *module, *best_module = NULL;
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int priority, best_priority = -1;
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/* if no components are available (e.g., we are not in a daemon), then
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* there is nothing to do - so just return
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*/
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if (!orte_odls_base.components_available) {
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orte_odls_base.selected = false;
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return ORTE_SUCCESS;
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}
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/* Iterate through all the available components */
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for (item = opal_list_get_first(&orte_odls_base.available_components);
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item != opal_list_get_end(&orte_odls_base.available_components);
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item = opal_list_get_next(item)) {
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cli = (mca_base_component_list_item_t *) item;
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component = (orte_odls_base_component_t *) cli->cli_component;
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/* Call the component's init function and see if it wants to be
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selected */
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module = component->init(&priority);
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/* If we got a non-NULL module back, then the component wants to
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be selected. So save its multi/hidden values and save the
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module with the highest priority */
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if (NULL != module) {
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/* If this is the best one, save it */
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if (priority > best_priority) {
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/* If there was a previous best one, finalize */
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if (NULL != best_component) {
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best_component->finalize();
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}
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/* Save the new best one */
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best_module = module;
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best_component = component;
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/* update the best priority */
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best_priority = priority;
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}
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/* If it's not the best one, finalize it */
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else {
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component->finalize();
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}
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}
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}
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/* If we didn't find one to select, then we have a big problem */
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if (NULL == best_component) {
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orte_odls_base.selected = false;
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return ORTE_ERROR;
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}
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/* We have happiness -- save the component and module for later
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usage */
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orte_odls = *best_module;
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orte_odls_base.selected_component = *best_component;
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orte_odls_base.selected = true;
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/* all done */
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return ORTE_SUCCESS;
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}
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