Function mpi::ffi::MPI_Pack_external

pub unsafe extern fn MPI_Pack_external(datarep: *const c_char,
                                       inbuf: *const c_void,
                                       incount: c_int,
                                       datatype: MPI_Datatype,
                                       outbuf: *mut c_void,
                                       outsize: MPI_Aint,
                                       position: *mut MPI_Aint)
                                       -> c_int