Function mpi::ffi::PMPI_File_read_at_all

pub unsafe extern fn PMPI_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