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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) 2013-2020 Intel, Inc. All rights reserved.
* Copyright (c) 2015 Mellanox Technologies, Inc. All rights reserved.
* Copyright (c) 2019 IBM Corporation. All rights reserved.
* Copyright (c) 2021-2023 Nanook Consulting. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
*/
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <pmix.h>
#include "examples.h"
static pmix_proc_t myproc;
/* this is the event notification function we pass down below
* when registering for general events - i.e.,, the default
* handler. We don't technically need to register one, but it
* is usually good practice to catch any events that occur */
static void notification_fn(size_t evhdlr_registration_id, pmix_status_t status,
const pmix_proc_t *source, pmix_info_t info[], size_t ninfo,
pmix_info_t results[], size_t nresults,
pmix_event_notification_cbfunc_fn_t cbfunc, void *cbdata)
{
if (NULL != cbfunc) {
cbfunc(PMIX_EVENT_ACTION_COMPLETE, NULL, 0, NULL, NULL, cbdata);
}
EXAMPLES_HIDE_UNUSED_PARAMS(evhdlr_registration_id, source, info, ninfo, results, nresults);
fprintf(stderr, "Default error handler called with status %s\n", PMIx_Error_string(status));
}
/* this is an event notification function that we explicitly request
* be called when the PMIX_PROCESS_SET_DEFINE notification is issued.
*/
static void release_fn(size_t evhdlr_registration_id, pmix_status_t status,
const pmix_proc_t *source, pmix_info_t info[], size_t ninfo,
pmix_info_t results[], size_t nresults,
pmix_event_notification_cbfunc_fn_t cbfunc, void *cbdata)
{
myrel_t *lock;
size_t n;
char *pset = NULL;
EXAMPLES_HIDE_UNUSED_PARAMS(evhdlr_registration_id, status, source, info, ninfo, results, nresults);
/* find the return object */
lock = NULL;
for (n = 0; n < ninfo; n++) {
if (PMIX_CHECK_KEY(&info[n], PMIX_EVENT_RETURN_OBJECT)) {
lock = (myrel_t *) info[n].value.data.ptr;
} else if (PMIX_CHECK_KEY(&info[n], PMIX_PSET_NAME)) {
pset = info[n].value.data.string;
}
}
/* if the object wasn't returned, then that is an error */
if (NULL == lock) {
fprintf(stderr, "LOCK WASN'T RETURNED IN RELEASE CALLBACK\n");
/* let the event handler progress */
if (NULL != cbfunc) {
cbfunc(PMIX_SUCCESS, NULL, 0, NULL, NULL, cbdata);
}
return;
}
/* the status will be PMIX_PROCESS_SET_DEFINE since that is the code
* we registered to receive, so just return success */
lock->lock.status = PMIX_SUCCESS;
if (NULL != pset) {
lock->lock.answer = strdup(pset);
}
/* tell the event handler state machine that we are the last step */
if (NULL != cbfunc) {
cbfunc(PMIX_EVENT_ACTION_COMPLETE, NULL, 0, NULL, NULL, cbdata);
}
/* release the lock */
DEBUG_WAKEUP_THREAD(&lock->lock);
}
/* event handler registration is done asynchronously because it
* may involve the PMIx server registering with the host RM for
* external events. So we provide a callback function that returns
* the status of the request (success or an error), plus a numerical index
* to the registered event. The index is used later on to deregister
* an event handler - if we don't explicitly deregister it, then the
* PMIx server will do so when it see us exit */
static void evhandler_reg_callbk(pmix_status_t status, size_t evhandler_ref, void *cbdata)
{
mylock_t *lock = (mylock_t *) cbdata;
if (PMIX_SUCCESS != status) {
fprintf(stderr, "Client %s:%d EVENT HANDLER REGISTRATION FAILED WITH STATUS %d, ref=%lu\n",
myproc.nspace, myproc.rank, status, (unsigned long) evhandler_ref);
}
lock->status = status;
lock->evhandler_ref = evhandler_ref;
DEBUG_WAKEUP_THREAD(lock);
}
int main(int argc, char **argv)
{
int rc;
pmix_status_t pnm = PMIX_PROCESS_SET_DEFINE;
mylock_t mylock;
myrel_t myrel;
pmix_info_t info;
pmix_value_t *val;
EXAMPLES_HIDE_UNUSED_PARAMS(argc, argv);
/* init us */
if (PMIX_SUCCESS != (rc = PMIx_Init(&myproc, NULL, 0))) {
fprintf(stderr, "Client ns %s rank %d: PMIx_Init failed: %d\n", myproc.nspace, myproc.rank,
rc);
exit(0);
}
fprintf(stderr, "Client ns %s rank %d: Running\n", myproc.nspace, myproc.rank);
/* register our default event handler */
DEBUG_CONSTRUCT_LOCK(&mylock);
PMIx_Register_event_handler(NULL, 0, NULL, 0, notification_fn, evhandler_reg_callbk,
(void *) &mylock);
DEBUG_WAIT_THREAD(&mylock);
rc = mylock.status;
DEBUG_DESTRUCT_LOCK(&mylock);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "[%s:%d] Default handler registration failed\n", myproc.nspace,
myproc.rank);
goto done;
}
/* register for process set name being defined */
DEBUG_CONSTRUCT_LOCK(&mylock);
PMIX_INFO_CONSTRUCT(&info);
DEBUG_CONSTRUCT_MYREL(&myrel);
PMIX_INFO_LOAD(&info, PMIX_EVENT_RETURN_OBJECT, &myrel, PMIX_POINTER);
PMIx_Register_event_handler(&pnm, 1, &info, 1, release_fn, evhandler_reg_callbk,
(void *) &mylock);
/* wait for registration to complete */
DEBUG_WAIT_THREAD(&mylock);
rc = mylock.status;
DEBUG_DESTRUCT_LOCK(&mylock);
PMIX_INFO_DESTRUCT(&info);
if (PMIX_SUCCESS != rc) {
fprintf(stderr, "[%s:%d] Debug handler registration failed\n", myproc.nspace,
myproc.rank);
goto done;
}
/* wait for process set name to be defined */
DEBUG_WAIT_THREAD(&myrel.lock);
if (NULL != myrel.lock.answer) {
fprintf(stderr, "Received process set name %s\n", myrel.lock.answer);
} else {
fprintf(stderr, "Received bad answer\n");
}
DEBUG_DESTRUCT_MYREL(&myrel);
// check if I can retrieve my new pset membership
if (PMIX_SUCCESS != (rc = PMIx_Get(&myproc, PMIX_PSET_NAMES, NULL, 0, &val))) {
fprintf(stderr, "[%s:%d] PMIx_Get PMIX_PSET_NAMES returned %s\n", myproc.nspace,
myproc.rank, PMIx_Error_string(rc));
goto done;
}
fprintf(stderr, "[%s:%d] belongs to psets %s\n", myproc.nspace, myproc.rank, val->data.string);
PMIX_VALUE_RELEASE(val);
done:
/* finalize us */
fprintf(stderr, "Client ns %s rank %d: Finalizing\n", myproc.nspace, myproc.rank);
if (PMIX_SUCCESS != (rc = PMIx_Finalize(NULL, 0))) {
fprintf(stderr, "Client ns %s rank %d:PMIx_Finalize failed: %d\n", myproc.nspace,
myproc.rank, rc);
} else {
fprintf(stderr, "Client ns %s rank %d:PMIx_Finalize successfully completed\n",
myproc.nspace, myproc.rank);
}
fflush(stderr);
return (0);
}
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