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/*
* Copyright (c) 2013 Mellanox Technologies, Inc.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "oshmem_config.h"
#include "opal/class/opal_list.h"
#include "oshmem/mca/mca.h"
#include "opal/mca/base/base.h"
#include "opal/mca/base/mca_base_component_repository.h"
#include "oshmem/constants.h"
#include "oshmem/util/oshmem_util.h"
#include "oshmem/mca/atomic/atomic.h"
#include "oshmem/mca/atomic/base/base.h"
/*
* Private functions
*/
static int init_query(const mca_base_component_t * ls,
bool enable_progress_threads,
bool enable_threads);
/*
* Scan down the list of successfully opened components and query each of
* them (the opened list will be one or more components. If the user
* requested a specific component, it will be the only component in the
* opened list). Create and populate the available list of all
* components who indicate that they want to be considered for selection.
* Close all components who do not want to be considered for selection,
* and destroy the opened list.
*
* Also find the basic component while we're doing all of this, and save
* it in a global variable so that we can find it easily later (e.g.,
* during scope selection).
*/
int mca_atomic_base_find_available(bool enable_progress_threads,
bool enable_threads)
{
mca_base_component_list_item_t *cli, *next;
const mca_base_component_t *component;
OPAL_LIST_FOREACH_SAFE(cli, next, &oshmem_atomic_base_framework.framework_components, mca_base_component_list_item_t) {
component = cli->cli_component;
/* Call a subroutine to do the work, because the component may
represent different versions of the coll MCA. */
if (OSHMEM_SUCCESS != init_query(component, enable_progress_threads,
enable_threads)) {
/* If the component doesn't want to run, then close it.
Now close it out and release it from the DSO repository (if it's there). */
opal_list_remove_item(&oshmem_atomic_base_framework.framework_components, &cli->super);
mca_base_component_close(component, oshmem_atomic_base_framework.framework_output);
OBJ_RELEASE(cli);
}
}
/* If we have no collective components available, it's an error.
Thanks for playing! */
if (opal_list_get_size(&oshmem_atomic_base_framework.framework_components) == 0) {
ATOMIC_VERBOSE(10,
"atomic:find_available: no components available!");
return OSHMEM_ERROR;
}
/* All done */
return mca_atomic_base_select();
}
/*
* Query a component, see if it wants to run at all. If it does, save
* some information. If it doesn't, close it.
*/
static int init_query(const mca_base_component_t * component,
bool enable_progress_threads,
bool enable_threads)
{
int ret;
ATOMIC_VERBOSE(10,
"atomic:find_available: querying atomic component %s",
component->mca_component_name);
/* This component has already been successfully opened. So now
query it. */
if (1 == component->mca_type_major_version
&& 0 == component->mca_type_minor_version
&& 0 == component->mca_type_release_version) {
mca_atomic_base_component_t *atomic =
(mca_atomic_base_component_t *) component;
ret = atomic->atomic_startup(enable_progress_threads, enable_threads);
} else {
/* Unrecognized coll API version */
ATOMIC_VERBOSE(10,
"atomic:find_available: unrecognized atomic API version (%d.%d.%d, ignored)",
component->mca_type_major_version,
component->mca_type_minor_version,
component->mca_type_release_version);
return OSHMEM_ERROR;
}
/* Query done -- look at the return value to see what happened */
if (OSHMEM_SUCCESS != ret) {
ATOMIC_VERBOSE(10,
"atomic:find_available: atomic component %s is not available",
component->mca_component_name);
if (NULL != component->mca_close_component) {
component->mca_close_component();
}
} else {
ATOMIC_VERBOSE(10,
"atomic:find_available: atomic component %s is available",
component->mca_component_name);
}
/* All done */
return ret;
}
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