void *socket_listen_main_single_threaded(void *ptr) {
struct netdata_static_thread *static_thread = (struct netdata_static_thread *)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(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(!api_sockets.opened)
fatal("LISTENER: no listen sockets available.");
size_t 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);
int fdmax = 0;
for(i = 0; i < api_sockets.opened ; i++) {
if (api_sockets.fds[i] < 0 || api_sockets.fds[i] >= FD_SETSIZE)
fatal("LISTENER: Listen socket %d is not ready, or invalid.", api_sockets.fds[i]);
info("Listening on '%s'", (api_sockets.fds_names[i])?api_sockets.fds_names[i]:"UNKNOWN");
FD_SET(api_sockets.fds[i], &ifds);
FD_SET(api_sockets.fds[i], &efds);
if(fdmax < api_sockets.fds[i])
fdmax = api_sockets.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 < api_sockets.opened ; i++) {
if (FD_ISSET(api_sockets.fds[i], &rifds)) {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: new connection.");
w = web_client_create(api_sockets.fds[i]);
if(api_sockets.fds_families[i] == AF_UNIX)
web_client_set_unix(w);
else
web_client_set_tcp(w);
if (single_threaded_link_client(w, &ifds, &ofds, &ifds, &fdmax) != 0) {
web_client_free(w);
}
}
}
for(i = 0 ; i <= (size_t)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(web_client_has_wait_receive(w) && 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_request(w);
}
}
if (unlikely(web_client_has_wait_send(w) && 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!");
listen_sockets_close(&api_sockets);
static_thread->enabled = 0;
pthread_exit(NULL);
return NULL;
}
void *socket_listen_main_single_threaded(void *ptr) {
netdata_thread_cleanup_push(socket_listen_main_single_threaded_cleanup, ptr);
web_server_mode = WEB_SERVER_MODE_SINGLE_THREADED;
web_server_is_multithreaded = 0;
struct web_client *w;
if(!api_sockets.opened)
fatal("LISTENER: no listen sockets available.");
size_t i;
for(i = 0; i < (size_t)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 < api_sockets.opened ; i++) {
if (api_sockets.fds[i] < 0 || api_sockets.fds[i] >= (int)FD_SETSIZE)
fatal("LISTENER: Listen socket %d is not ready, or invalid.", api_sockets.fds[i]);
info("Listening on '%s'", (api_sockets.fds_names[i])?api_sockets.fds_names[i]:"UNKNOWN");
FD_SET(api_sockets.fds[i], &ifds);
FD_SET(api_sockets.fds[i], &efds);
if(fdmax < api_sockets.fds[i])
fdmax = api_sockets.fds[i];
}
while(!netdata_exit) {
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;
int 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 < api_sockets.opened ; i++) {
if (FD_ISSET(api_sockets.fds[i], &rifds)) {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: new connection.");
w = web_client_create_on_listenfd(api_sockets.fds[i]);
if(unlikely(!w))
continue;
if(api_sockets.fds_families[i] == AF_UNIX)
web_client_set_unix(w);
else
web_client_set_tcp(w);
if (single_threaded_link_client(w, &ifds, &ofds, &ifds, &fdmax) != 0) {
web_client_release(w);
}
}
}
for(i = 0 ; i <= (size_t)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)) {
// error("no client on slot %zu", i);
continue;
}
if(unlikely(single_threaded_unlink_client(w, &ifds, &ofds, &efds) != 0)) {
// error("failed to unlink client %zu", i);
web_client_release(w);
continue;
}
if (unlikely(FD_ISSET(w->ifd, &refds) || FD_ISSET(w->ofd, &refds))) {
// error("no input on client %zu", i);
web_client_release(w);
continue;
}
if (unlikely(web_client_has_wait_receive(w) && FD_ISSET(w->ifd, &rifds))) {
if (unlikely(web_client_receive(w) < 0)) {
// error("cannot read from client %zu", i);
web_client_release(w);
continue;
}
if (w->mode != WEB_CLIENT_MODE_FILECOPY) {
debug(D_WEB_CLIENT, "%llu: Processing received data.", w->id);
web_client_process_request(w);
}
}
if (unlikely(web_client_has_wait_send(w) && FD_ISSET(w->ofd, &rofds))) {
if (unlikely(web_client_send(w) < 0)) {
// error("cannot send data to client %zu", i);
debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
web_client_release(w);
continue;
}
}
if(unlikely(single_threaded_link_client(w, &ifds, &ofds, &efds, &fdmax) != 0)) {
// error("failed to link client %zu", i);
web_client_release(w);
}
}
}
else {
debug(D_WEB_CLIENT_ACCESS, "LISTENER: single threaded web server timeout.");
}
}
netdata_thread_cleanup_pop(1);
return NULL;
}