Function mpi::ffi::PMPI_File_write_at_all

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