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/*
* Copyright (c) 2004-2010 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2011 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) 2006-2013 Los Alamos National Security, LLC.
* All rights reserved.
* Copyright (c) 2009-2012 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2011 Oak Ridge National Labs. All rights reserved.
* Copyright (c) 2013-2019 Intel, Inc. All rights reserved.
* Copyright (c) 2015 Mellanox Technologies, Inc. All rights reserved.
* Copyright (c) 2021-2025 Nanook Consulting All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
*/
#define _GNU_SOURCE
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "examples.h"
#include <pmix.h>
static pmix_proc_t myproc;
/* this is a callback function for the PMIx_Query
* API. The query will callback with a status indicating
* if the request could be fully satisfied, partially
* satisfied, or completely failed. The info parameter
* contains an array of the returned data, with the
* info->key field being the key that was provided in
* the query call. Thus, you can correlate the returned
* data in the info->value field to the requested key.
*
* Once we have dealt with the returned data, we must
* call the release_fn so that the PMIx library can
* cleanup */
static void cbfunc(pmix_status_t status, pmix_info_t *info, size_t ninfo, void *cbdata,
pmix_release_cbfunc_t release_fn, void *release_cbdata)
{
mylock_t *lock = (mylock_t *) cbdata;
size_t n;
char *tmp;
lock->status = status;
fprintf(stderr, "Query returned %d values status %s\n", (int) ninfo, PMIx_Error_string(status));
/* print out the returned keys and pmix_info_t structs */
for (n = 0; n < ninfo; n++) {
tmp = PMIx_Info_string(&info[n]);
fprintf(stderr, "%s\n", tmp);
free(tmp);
}
/* let the library release the data and cleanup from
* the operation */
if (NULL != release_fn) {
release_fn(release_cbdata);
}
/* release the block */
DEBUG_WAKEUP_THREAD(lock);
}
int main(int argc, char **argv)
{
pmix_status_t rc;
pid_t pid;
char hostname[1024];
pmix_value_t *val;
uint16_t localrank;
pmix_query_t query;
mylock_t mylock;
bool refresh = false;
bool singleton = false;
if (1 < argc) {
if (NULL != strstr(argv[1], "true")) {
refresh = true;
}
}
pid = getpid();
gethostname(hostname, 1024);
/* init us - note that the call to "init" includes the return of
* any job-related info provided by the RM. This includes any
* debugger flag instructing us to stop-in-init. If such a directive
* is included, then the process will be stopped in this call until
* the "debugger release" notification arrives */
if (PMIX_SUCCESS != (rc = PMIx_Init(&myproc, NULL, 0))) {
if (PMIX_ERR_UNREACH == rc) {
/* we are operating as a singleton */
singleton = true;
} else {
fprintf(stderr, "Client ns %s rank %d: PMIx_Init failed: %s\n", myproc.nspace, myproc.rank,
PMIx_Error_string(rc));
exit(0);
}
}
/* get our local rank */
if (PMIX_SUCCESS != (rc = PMIx_Get(&myproc, PMIX_LOCAL_RANK, NULL, 0, &val))) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Get local rank failed: %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
localrank = val->data.uint16;
PMIX_VALUE_RELEASE(val);
fprintf(stderr, "Client ns %s rank %d pid %lu: Running on host %s%slocalrank %d\n",
myproc.nspace, myproc.rank, (unsigned long) pid, hostname,
singleton ? " as singleton " : " ", (int) localrank);
if (!singleton) {
#if PMIX_VERSION_MAJOR >= 4
PMIX_QUERY_CONSTRUCT(&query);
PMIX_ARGV_APPEND(rc, query.keys, PMIX_QUERY_NUM_PSETS);
PMIX_ARGV_APPEND(rc, query.keys, PMIX_QUERY_PSET_NAMES);
if (refresh) {
PMIX_INFO_CREATE(query.qualifiers, 1);
query.nqual = 1;
PMIX_INFO_LOAD(&query.qualifiers[0], PMIX_QUERY_REFRESH_CACHE, &refresh, PMIX_BOOL);
}
/* setup the caddy to retrieve the data */
DEBUG_CONSTRUCT_LOCK(&mylock);
/* execute the query */
if (PMIX_SUCCESS != (rc = PMIx_Query_info_nb(&query, 1, cbfunc, (void *) &mylock))) {
fprintf(stderr, "PMIx_Query_info failed: %d\n", rc);
goto done;
}
DEBUG_WAIT_THREAD(&mylock);
if (PMIX_SUCCESS != mylock.status) {
rc = mylock.status;
}
DEBUG_DESTRUCT_LOCK(&mylock);
#endif
}
done:
/* finalize us */
rc = PMIx_Finalize(NULL, 0);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "Finalize failed: %s\n", PMIx_Error_string(rc));
}
fflush(stderr);
return (rc);
}
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