Function mpi::ffi::MPI_File_read_at_all

pub unsafe extern fn MPI_File_read_at_all(fh: MPI_File,
                                          offset: MPI_Offset,
                                          buf: *mut c_void,
                                          count: c_int,
                                          datatype: MPI_Datatype,
                                          status: *mut MPI_Status)
                                          -> c_int