128 строки
4.1 KiB
C
128 строки
4.1 KiB
C
/*
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* Copyright (c) 2004-2008 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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* $COPYRIGHT$
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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 "opal_config.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#include "opal/runtime/opal.h"
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#include "opal/class/opal_list.h"
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#include "opal/util/output.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 "opal/mca/base/mca_base_component_repository.h"
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#include "opal/constants.h"
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int mca_base_select(const char *type_name, int output_id,
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opal_list_t *components_available,
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mca_base_module_t **best_module,
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mca_base_component_t **best_component)
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{
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mca_base_component_list_item_t *cli = NULL;
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mca_base_component_t *component = NULL;
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mca_base_module_t *module = NULL;
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int priority = 0, best_priority = INT32_MIN;
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*best_module = NULL;
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*best_component = NULL;
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opal_output_verbose(10, output_id,
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"mca:base:select: Auto-selecting %s components",
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type_name);
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/*
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* Traverse the list of available components.
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* For each call their 'query' functions to determine relative priority.
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*/
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OPAL_LIST_FOREACH(cli, components_available, mca_base_component_list_item_t) {
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component = (mca_base_component_t *) cli->cli_component;
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/*
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* If there is a query function then use it.
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*/
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if (NULL == component->mca_query_component) {
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opal_output_verbose(5, output_id,
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"mca:base:select:(%5s) Skipping component [%s]. It does not implement a query function",
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type_name, component->mca_component_name );
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continue;
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}
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/*
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* Query this component for the module and priority
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*/
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opal_output_verbose(5, output_id,
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"mca:base:select:(%5s) Querying component [%s]",
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type_name, component->mca_component_name);
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component->mca_query_component(&module, &priority);
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/*
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* If no module was returned, then skip component
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*/
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if (NULL == module) {
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opal_output_verbose(5, output_id,
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"mca:base:select:(%5s) Skipping component [%s]. Query failed to return a module",
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type_name, component->mca_component_name );
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continue;
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}
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/*
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* Determine if this is the best module we have seen by looking the priority
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*/
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opal_output_verbose(5, output_id,
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"mca:base:select:(%5s) Query of component [%s] set priority to %d",
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type_name, component->mca_component_name, priority);
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if (priority > best_priority) {
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best_priority = priority;
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*best_component = component;
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*best_module = module;
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}
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}
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/*
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* Finished querying all components.
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* Make sure we found something in the process.
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*/
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if (NULL == *best_component) {
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opal_output_verbose(5, output_id,
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"mca:base:select:(%5s) No component selected!",
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type_name);
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/*
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* Still close the non-selected components
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*/
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mca_base_components_close(0, /* Pass 0 to keep this from closing the output handle */
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components_available,
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NULL);
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return OPAL_ERR_NOT_FOUND;
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}
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opal_output_verbose(5, output_id,
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"mca:base:select:(%5s) Selected component [%s]",
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type_name, (*best_component)->mca_component_name);
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/*
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* Close the non-selected components
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*/
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mca_base_components_close(output_id,
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components_available,
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(mca_base_component_t *) (*best_component));
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return OPAL_SUCCESS;
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}
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