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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2012 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include <stdio.h>
#include <mpi.h>
#include "mpitest.h"
#include "mpithreadtest.h"
#define NUM_THREADS 8
#define NUM_ITER 100
#define check(X_) \
do { \
if (!(X_)) { \
printf("[%s:%d] -- Assertion failed: %s\n", __FILE__, __LINE__, #X_);\
MPI_Abort(MPI_COMM_WORLD, 1); \
} \
} while (0)
MPI_Comm comms[NUM_THREADS];
int rank, size;
MTEST_THREAD_RETURN_TYPE test_comm_create(void *arg)
{
int i;
for (i = 0; i < NUM_ITER; i++) {
MPI_Group world_group;
MPI_Comm comm;
MPI_Comm_group(comms[*(int *) arg], &world_group);
/* Every thread paticipates in a distinct MPI_Comm_create on distinct
* communicators. Thus, there is no violation of MPI threads +
* communicators semantics.
*/
MPI_Comm_create(comms[*(int *) arg], world_group, &comm);
MPI_Barrier(comm);
MPI_Comm_free(&comm);
MPI_Group_free(&world_group);
}
return NULL;
}
int main(int argc, char **argv)
{
int thread_args[NUM_THREADS];
int i, err, provided;
MPI_Init_thread(&argc, &argv, MPI_THREAD_MULTIPLE, &provided);
check(provided == MPI_THREAD_MULTIPLE);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
for (i = 0; i < NUM_THREADS; i++) {
MPI_Comm_dup(MPI_COMM_WORLD, &comms[i]);
}
for (i = 0; i < NUM_THREADS; i++) {
thread_args[i] = i;
MTest_Start_thread(test_comm_create, (void *) &thread_args[i]);
}
MTest_Join_threads();
for (i = 0; i < NUM_THREADS; i++) {
MPI_Comm_free(&comms[i]);
}
if (rank == 0)
printf(" No Errors\n");
MPI_Finalize();
return 0;
}
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