int MPIR_Barrier(MPID_Comm *comm_ptr, MPIR_Errflag_t *errflag)
{
int mpi_errno = MPI_SUCCESS;
if (comm_ptr->comm_kind == MPID_INTRACOMM) {
/* intracommunicator */
mpi_errno = MPIR_Barrier_intra( comm_ptr, errflag );
if (mpi_errno) MPIR_ERR_POP(mpi_errno);
} else {
/* intercommunicator */
mpi_errno = MPIR_Barrier_inter( comm_ptr, errflag );
if (mpi_errno) MPIR_ERR_POP(mpi_errno);
}
fn_exit:
return mpi_errno;
fn_fail:
goto fn_exit;
}
int MPIR_Barrier_impl(MPID_Comm *comm_ptr, int *errflag)
{
int mpi_errno = MPI_SUCCESS;
int mpi_errno_ret = MPI_SUCCESS;
if (comm_ptr->coll_fns != NULL && comm_ptr->coll_fns->Barrier != NULL)
{
mpi_errno = comm_ptr->coll_fns->Barrier(comm_ptr, errflag);
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
else
{
if (comm_ptr->comm_kind == MPID_INTRACOMM) {
#if defined(USE_SMP_COLLECTIVES)
if (MPIR_Comm_is_node_aware(comm_ptr)) {
/* do the intranode barrier on all nodes */
if (comm_ptr->node_comm != NULL)
{
mpi_errno = MPIR_Barrier_or_coll_fn(comm_ptr->node_comm, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
/* do the barrier across roots of all nodes */
if (comm_ptr->node_roots_comm != NULL) {
mpi_errno = MPIR_Barrier_or_coll_fn(comm_ptr->node_roots_comm, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
/* release the local processes on each node with a 1-byte broadcast
(0-byte broadcast just returns without doing anything) */
if (comm_ptr->node_comm != NULL)
{
int i=0;
mpi_errno = MPIR_Bcast_impl(&i, 1, MPI_BYTE, 0, comm_ptr->node_comm, errflag);
if (mpi_errno) {
/* for communication errors, just record the error but continue */
*errflag = TRUE;
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**fail");
MPIU_ERR_ADD(mpi_errno_ret, mpi_errno);
}
}
}
else {
mpi_errno = MPIR_Barrier_intra( comm_ptr, errflag );
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
#else
mpi_errno = MPIR_Barrier_intra( comm_ptr, errflag );
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
#endif
}
else {
/* intercommunicator */
mpi_errno = MPIR_Barrier_inter( comm_ptr, errflag );
if (mpi_errno) MPIU_ERR_POP(mpi_errno);
}
}
fn_exit:
if (mpi_errno_ret)
mpi_errno = mpi_errno_ret;
else if (*errflag)
MPIU_ERR_SET(mpi_errno, MPI_ERR_OTHER, "**coll_fail");
return mpi_errno;
fn_fail:
goto fn_exit;
}
