@item @var{void} @ref{gnutls_global_set_mem_functions} (gnutls_alloc_function @var{alloc_func}, gnutls_alloc_function @var{secure_alloc_func}, gnutls_is_secure_function @var{is_secure_func}, gnutls_realloc_function @var{realloc_func}, gnutls_free_function @var{free_func})