NO_OPENED_SOCKET
static int g_sock_fd = NO_OPENED_SOCKET;
static int save_g_sock_fd = NO_OPENED_SOCKET;
if (g_sock_fd != NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (g_sock_fd == NO_OPENED_SOCKET) {
if (save_g_sock_fd != NO_OPENED_SOCKET) {
save_g_sock_fd = NO_OPENED_SOCKET;
g_sock_fd = NO_OPENED_SOCKET;