1 /* Copyright (c) 2013-2023. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "../colls_private.hpp"
8 namespace simgrid::smpi {
9 int bcast__flattree(void *buff, int count, MPI_Datatype data_type,
10 int root, MPI_Comm comm)
12 int i, rank, num_procs;
13 int tag = COLL_TAG_BCAST;
16 num_procs = comm->size();
19 Request::recv(buff, count, data_type, root, tag, comm, MPI_STATUS_IGNORE);
23 auto* reqs = new MPI_Request[num_procs - 1];
24 MPI_Request* req_ptr = reqs;
26 // Root sends data to all others
27 for (i = 0; i < num_procs; i++) {
30 *(req_ptr++) = Request::isend(buff, count, data_type, i, tag, comm);
33 // wait on all requests
34 Request::waitall(num_procs - 1, reqs, MPI_STATUSES_IGNORE);
41 } // namespace simgrid::smpi