void *socket_listen_main_single_threaded(void *ptr) {
(void)ptr;
web_server_mode = WEB_SERVER_MODE_SINGLE_THREADED;
info("Single threaded WEB SERVER thread created with task id %d", gettid());
struct web_client *w;
int retval, failures = 0;
if(ptr) { ; }
if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
error("Cannot set pthread cancel type to DEFERRED.");
if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
error("Cannot set pthread cancel state to ENABLE.");
if(listen_fd < 0 || listen_fd >= FD_SETSIZE)
fatal("LISTENER: Listen socket %d is not ready, or invalid.", listen_fd);
int i;
for(i = 0; i < FD_SETSIZE ; i++)
single_threaded_clients[i] = NULL;
fd_set ifds, ofds, efds, rifds, rofds, refds;
FD_ZERO (&ifds);
FD_ZERO (&ofds);
FD_ZERO (&efds);
FD_SET(listen_fd, &ifds);
FD_SET(listen_fd, &efds);
int fdmax = listen_fd;
for(;;) {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server waiting (listen fd = %d, fdmax = %d)...", listen_fd, fdmax);
struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
rifds = ifds;
rofds = ofds;
refds = efds;
retval = select(fdmax+1, &rifds, &rofds, &refds, &tv);
if(unlikely(retval == -1)) {
debug(D_WEB_CLIENT, "LISTENER: select() failed.");
failures++;
if(failures > 10) {
if(global_statistics.connected_clients) {
error("REMOVING ALL %lu WEB CLIENTS !", global_statistics.connected_clients);
while (web_clients) {
single_threaded_unlink_client(web_clients, &ifds, &ofds, &efds);
web_client_free(web_clients);
}
}
error("LISTENER: our listen port %d seems dead. Re-opening it.", listen_fd);
close(listen_fd);
listen_fd = -1;
sleep(5);
create_listen_socket();
if(listen_fd < 0 || listen_fd >= FD_SETSIZE)
fatal("Cannot listen for web clients (connected clients %llu).", global_statistics.connected_clients);
FD_ZERO (&ifds);
FD_ZERO (&ofds);
FD_ZERO (&efds);
FD_SET(listen_fd, &ifds);
FD_SET(listen_fd, &efds);
failures = 0;
}
}
else if(likely(retval)) {
failures = 0;
debug(D_WEB_CLIENT_ACCESS, "LISTENER: got something.");
if(FD_ISSET(listen_fd, &rifds)) {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: new connection.");
w = web_client_create(listen_fd);
if(single_threaded_link_client(w, &ifds, &ofds, &ifds, &fdmax) != 0) {
web_client_free(w);
}
}
for(i = 0 ; i <= fdmax ; i++) {
if(likely(!FD_ISSET(i, &rifds) && !FD_ISSET(i, &rofds) && !FD_ISSET(i, &refds)))
continue;
w = single_threaded_clients[i];
if(unlikely(!w))
continue;
if(unlikely(single_threaded_unlink_client(w, &ifds, &ofds, &efds) != 0)) {
web_client_free(w);
continue;
}
if (unlikely(FD_ISSET(w->ifd, &refds) || FD_ISSET(w->ofd, &refds))) {
web_client_free(w);
continue;
}
if (unlikely(w->wait_receive && FD_ISSET(w->ifd, &rifds))) {
if (unlikely(web_client_receive(w) < 0)) {
web_client_free(w);
continue;
}
if (w->mode != WEB_CLIENT_MODE_FILECOPY) {
debug(D_WEB_CLIENT, "%llu: Processing received data.", w->id);
web_client_process(w);
}
}
if (unlikely(w->wait_send && FD_ISSET(w->ofd, &rofds))) {
if (unlikely(web_client_send(w) < 0)) {
debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
web_client_free(w);
continue;
}
}
if(unlikely(single_threaded_link_client(w, &ifds, &ofds, &efds, &fdmax) != 0)) {
web_client_free(w);
}
}
}
else {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server timeout.");
#ifdef NETDATA_INTERNAL_CHECKS
log_allocations();
#endif
}
}
debug(D_WEB_CLIENT, "LISTENER: exit!");
close(listen_fd);
listen_fd = -1;
return NULL;
}
void *socket_listen_main_single_threaded(void *ptr) {
(void)ptr;
web_server_mode = WEB_SERVER_MODE_SINGLE_THREADED;
info("Single-threaded WEB SERVER thread created with task id %d", gettid());
struct web_client *w;
int retval;
if(ptr) { ; }
if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
error("Cannot set pthread cancel type to DEFERRED.");
if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
error("Cannot set pthread cancel state to ENABLE.");
int i;
if(!listen_fds_count)
fatal("LISTENER: no listen sockets available.");
for(i = 0; i < FD_SETSIZE ; i++)
single_threaded_clients[i] = NULL;
fd_set ifds, ofds, efds, rifds, rofds, refds;
FD_ZERO (&ifds);
FD_ZERO (&ofds);
FD_ZERO (&efds);
int fdmax = 0;
for(i = 0; i < listen_fds_count ; i++) {
if (listen_fds[i] < 0 || listen_fds[i] >= FD_SETSIZE)
fatal("LISTENER: Listen socket %d is not ready, or invalid.", listen_fds[i]);
info("Listening on '%s'", (listen_fds_names[i])?listen_fds_names[i]:"UNKNOWN");
FD_SET(listen_fds[i], &ifds);
FD_SET(listen_fds[i], &efds);
if(fdmax < listen_fds[i])
fdmax = listen_fds[i];
}
for(;;) {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server waiting (fdmax = %d)...", fdmax);
struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
rifds = ifds;
rofds = ofds;
refds = efds;
retval = select(fdmax+1, &rifds, &rofds, &refds, &tv);
if(unlikely(retval == -1)) {
error("LISTENER: select() failed.");
continue;
}
else if(likely(retval)) {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: got something.");
for(i = 0; i < listen_fds_count ; i++) {
if (FD_ISSET(listen_fds[i], &rifds)) {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: new connection.");
w = web_client_create(listen_fds[i]);
if (single_threaded_link_client(w, &ifds, &ofds, &ifds, &fdmax) != 0) {
web_client_free(w);
}
}
}
for(i = 0 ; i <= fdmax ; i++) {
if(likely(!FD_ISSET(i, &rifds) && !FD_ISSET(i, &rofds) && !FD_ISSET(i, &refds)))
continue;
w = single_threaded_clients[i];
if(unlikely(!w))
continue;
if(unlikely(single_threaded_unlink_client(w, &ifds, &ofds, &efds) != 0)) {
web_client_free(w);
continue;
}
if (unlikely(FD_ISSET(w->ifd, &refds) || FD_ISSET(w->ofd, &refds))) {
web_client_free(w);
continue;
}
if (unlikely(w->wait_receive && FD_ISSET(w->ifd, &rifds))) {
if (unlikely(web_client_receive(w) < 0)) {
web_client_free(w);
continue;
}
if (w->mode != WEB_CLIENT_MODE_FILECOPY) {
debug(D_WEB_CLIENT, "%llu: Processing received data.", w->id);
web_client_process(w);
}
}
if (unlikely(w->wait_send && FD_ISSET(w->ofd, &rofds))) {
if (unlikely(web_client_send(w) < 0)) {
debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
web_client_free(w);
continue;
}
}
if(unlikely(single_threaded_link_client(w, &ifds, &ofds, &efds, &fdmax) != 0)) {
web_client_free(w);
}
}
}
else {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server timeout.");
#ifdef NETDATA_INTERNAL_CHECKS
log_allocations();
#endif
}
}
debug(D_WEB_CLIENT, "LISTENER: exit!");
close_listen_sockets();
return NULL;
}
