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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpitest.h"
int main(void)
{
int mpi_errno = MPI_SUCCESS;
int errs = 0;
MTest_Init(NULL, NULL);
/* Current MPICH may not support thread multiple, especially with pervci */
int thread_level;
MPI_Query_thread(&thread_level);
if (thread_level == MPI_THREAD_MULTIPLE) {
goto fn_exit;
}
MPI_Comm comm;
MPI_Comm_dup(MPI_COMM_WORLD, &comm);
MPI_Comm_set_errhandler(comm, MPI_ERRORS_RETURN);
/* The implementation may raise an error on the default handler
* since it will happen during MPI_Comm_free. The default,
* as of MPI-4.0, is the error handler for MPI_COMM_SELF.
* Prior to MPI-4.0, it was MPI_COMM_WORLD. */
MPI_Comm_set_errhandler(MPI_COMM_SELF, MPI_ERRORS_RETURN);
MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
int rank;
MPI_Comm_rank(comm, &rank);
if (rank == 0) {
/* if an implementation does not use eager
* protocol, this send may hang */
MPI_Send(NULL, 0, MPI_INT, 1, 0, comm);
}
MPI_Barrier(comm);
mpi_errno = MPI_Comm_free(&comm);
/* unmatched message should be detected at rank 1 */
if (rank == 1 && mpi_errno == MPI_SUCCESS) {
errs++;
}
fn_exit:
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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