-BOOST_MPI_DECL int
-packed_archive_isend(MPI_Comm comm, int dest, int tag,
- const packed_oarchive& ar,
- MPI_Request* out_requests, int num_out_requests);
+BOOST_MPI_DECL request
+packed_archive_isend(communicator const& comm, int dest, int tag,
+ const packed_oarchive& ar);