2 * libwebsockets - small server side websockets and web server implementation
4 * Copyright (C) 2010-2016 Andy Green <andy@warmcat.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation:
9 * version 2.1 of the License.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
22 #include "private-libwebsockets.h"
25 lws_feature_status_libuv(struct lws_context_creation_info *info)
27 if (lws_check_opt(info->options, LWS_SERVER_OPTION_LIBUV))
28 lwsl_notice("libuv support compiled in and enabled\n");
30 lwsl_notice("libuv support compiled in but disabled\n");
34 lws_uv_idle(uv_idle_t *handle
35 #if UV_VERSION_MAJOR == 0
40 struct lws_context_per_thread *pt = lws_container_of(handle,
41 struct lws_context_per_thread, uv_idle);
43 lwsl_debug("%s\n", __func__);
46 * is there anybody with pending stuff that needs service forcing?
48 if (!lws_service_adjust_timeout(pt->context, 1, pt->tid)) {
49 /* -1 timeout means just do forced service */
50 lws_plat_service_tsi(pt->context, -1, pt->tid);
51 /* still somebody left who wants forced service? */
52 if (!lws_service_adjust_timeout(pt->context, 1, pt->tid))
53 /* yes... come back again later */
57 /* there is nobody who needs service forcing, shut down idle */
62 lws_io_cb(uv_poll_t *watcher, int status, int revents)
64 struct lws_io_watcher *lws_io = lws_container_of(watcher,
65 struct lws_io_watcher, uv_watcher);
66 struct lws *wsi = lws_container_of(lws_io, struct lws, w_read);
67 struct lws_context *context = lws_io->context;
68 struct lws_pollfd eventfd;
70 #if defined(WIN32) || defined(_WIN32)
71 eventfd.fd = watcher->socket;
73 eventfd.fd = watcher->io_watcher.fd;
79 /* at this point status will be an UV error, like UV_EBADF,
80 we treat all errors as LWS_POLLHUP */
82 /* you might want to return; instead of servicing the fd in some cases */
83 if (status == UV_EAGAIN)
86 eventfd.events |= LWS_POLLHUP;
87 eventfd.revents |= LWS_POLLHUP;
89 if (revents & UV_READABLE) {
90 eventfd.events |= LWS_POLLIN;
91 eventfd.revents |= LWS_POLLIN;
93 if (revents & UV_WRITABLE) {
94 eventfd.events |= LWS_POLLOUT;
95 eventfd.revents |= LWS_POLLOUT;
98 lws_service_fd(context, &eventfd);
100 uv_idle_start(&context->pt[(int)wsi->tsi].uv_idle, lws_uv_idle);
104 lws_uv_sigint_cb(uv_signal_t *watcher, int signum)
106 lwsl_info("internal signal handler caught signal %d\n", signum);
107 lws_libuv_stop(watcher->data);
111 lws_uv_sigint_cfg(struct lws_context *context, int use_uv_sigint,
114 context->use_ev_sigint = use_uv_sigint;
116 context->lws_uv_sigint_cb = cb;
118 context->lws_uv_sigint_cb = &lws_uv_sigint_cb;
124 lws_uv_timeout_cb(uv_timer_t *timer
125 #if UV_VERSION_MAJOR == 0
130 struct lws_context_per_thread *pt = lws_container_of(timer,
131 struct lws_context_per_thread, uv_timeout_watcher);
133 lwsl_debug("%s\n", __func__);
135 lws_service_fd_tsi(pt->context, NULL, pt->tid);
138 static const int sigs[] = { SIGINT, SIGTERM, SIGSEGV, SIGFPE };
141 lws_uv_initloop(struct lws_context *context, uv_loop_t *loop, int tsi)
143 struct lws_context_per_thread *pt = &context->pt[tsi];
144 struct lws_vhost *vh = context->vhost_list;
148 loop = lws_malloc(sizeof(*loop));
149 #if UV_VERSION_MAJOR > 0
152 lwsl_err("This libuv is too old to work...\n");
155 pt->ev_loop_foreign = 0;
157 pt->ev_loop_foreign = 1;
159 pt->io_loop_uv = loop;
160 uv_idle_init(loop, &pt->uv_idle);
162 if (pt->context->use_ev_sigint) {
163 assert(ARRAY_SIZE(sigs) <= ARRAY_SIZE(pt->signals));
164 for (n = 0; n < ARRAY_SIZE(sigs); n++) {
165 uv_signal_init(loop, &pt->signals[n]);
166 pt->signals[n].data = pt->context;
167 uv_signal_start(&pt->signals[n],
168 context->lws_uv_sigint_cb, sigs[n]);
173 * Initialize the accept wsi read watcher with all the listening sockets
174 * and register a callback for read operations
176 * We have to do it here because the uv loop(s) are not
177 * initialized until after context creation.
181 vh->lserv_wsi->w_read.context = context;
182 n = uv_poll_init_socket(pt->io_loop_uv,
183 &vh->lserv_wsi->w_read.uv_watcher,
184 vh->lserv_wsi->sock);
186 lwsl_err("uv_poll_init failed %d, sockfd=%p\n",
187 n, (void *)(long)vh->lserv_wsi->sock);
191 uv_poll_start(&vh->lserv_wsi->w_read.uv_watcher,
192 UV_READABLE, lws_io_cb);
197 uv_timer_init(pt->io_loop_uv, &pt->uv_timeout_watcher);
198 uv_timer_start(&pt->uv_timeout_watcher, lws_uv_timeout_cb, 1000, 1000);
203 void lws_uv_close_cb(uv_handle_t *handle)
208 void lws_uv_walk_cb(uv_handle_t *handle, void *arg)
210 uv_close(handle, lws_uv_close_cb);
214 lws_libuv_destroyloop(struct lws_context *context, int tsi)
216 struct lws_context_per_thread *pt = &context->pt[tsi];
219 if (!lws_check_opt(context->options, LWS_SERVER_OPTION_LIBUV))
225 if (context->use_ev_sigint)
226 uv_signal_stop(&pt->w_sigint.uv_watcher);
227 for (m = 0; m < ARRAY_SIZE(sigs); m++)
228 uv_signal_stop(&pt->signals[m]);
229 if (!pt->ev_loop_foreign) {
230 uv_stop(pt->io_loop_uv);
231 uv_walk(pt->io_loop_uv, lws_uv_walk_cb, NULL);
232 while (uv_run(pt->io_loop_uv, UV_RUN_NOWAIT));
233 #if UV_VERSION_MAJOR > 0
234 m = uv_loop_close(pt->io_loop_uv);
236 lwsl_debug("%s: uv_loop_close: UV_EBUSY\n", __func__);
238 lws_free(pt->io_loop_uv);
243 lws_libuv_accept(struct lws *wsi, int accept_fd)
245 struct lws_context *context = lws_get_context(wsi);
246 struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
248 if (!LWS_LIBUV_ENABLED(context))
251 lwsl_debug("%s: new wsi %p\n", __func__, wsi);
253 wsi->w_read.context = context;
255 uv_poll_init(pt->io_loop_uv, &wsi->w_read.uv_watcher, accept_fd);
259 lws_libuv_io(struct lws *wsi, int flags)
261 struct lws_context *context = lws_get_context(wsi);
262 struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
263 #if defined(WIN32) || defined(_WIN32)
264 int current_events = wsi->w_read.uv_watcher.events &
265 (UV_READABLE | UV_WRITABLE);
267 int current_events = wsi->w_read.uv_watcher.io_watcher.pevents &
268 (UV_READABLE | UV_WRITABLE);
270 struct lws_io_watcher *w = &wsi->w_read;
272 if (!LWS_LIBUV_ENABLED(context))
275 lwsl_debug("%s: wsi: %p, flags:%d\n", __func__, wsi, flags);
277 if (!pt->io_loop_uv) {
278 lwsl_info("%s: no io loop yet\n", __func__);
282 assert((flags & (LWS_EV_START | LWS_EV_STOP)) &&
283 (flags & (LWS_EV_READ | LWS_EV_WRITE)));
285 if (flags & LWS_EV_START) {
286 if (flags & LWS_EV_WRITE)
287 current_events |= UV_WRITABLE;
289 if (flags & LWS_EV_READ)
290 current_events |= UV_READABLE;
292 uv_poll_start(&w->uv_watcher, current_events, lws_io_cb);
294 if (flags & LWS_EV_WRITE)
295 current_events &= ~UV_WRITABLE;
297 if (flags & LWS_EV_READ)
298 current_events &= ~UV_READABLE;
300 if (!(current_events & (UV_READABLE | UV_WRITABLE)))
301 uv_poll_stop(&w->uv_watcher);
303 uv_poll_start(&w->uv_watcher, current_events,
309 lws_libuv_init_fd_table(struct lws_context *context)
313 if (!LWS_LIBUV_ENABLED(context))
316 for (n = 0; n < context->count_threads; n++)
317 context->pt[n].w_sigint.context = context;
323 lws_libuv_run(const struct lws_context *context, int tsi)
325 if (context->pt[tsi].io_loop_uv && LWS_LIBUV_ENABLED(context))
326 uv_run(context->pt[tsi].io_loop_uv, 0);
330 lws_libuv_kill(const struct lws_context *context)
334 for (n = 0; n < context->count_threads; n++)
335 if (context->pt[n].io_loop_uv && LWS_LIBUV_ENABLED(context))
336 uv_stop(context->pt[n].io_loop_uv);
337 // TODO uv_stop check foreign loop? or not?
341 * This does not actually stop the event loop. The reason is we have to pass
342 * libuv handle closures through its event loop. So this tries to close all
343 * wsi, and set a flag; when all the wsi closures are finalized then we
344 * actually stop the libuv event loops.
348 lws_libuv_stop(struct lws_context *context)
350 struct lws_context_per_thread *pt;
353 context->requested_kill = 1;
355 m = context->count_threads;
356 context->being_destroyed = 1;
359 pt = &context->pt[m];
361 for (n = 0; (unsigned int)n < context->pt[m].fds_count; n++) {
362 struct lws *wsi = wsi_from_fd(context, pt->fds[n].fd);
366 lws_close_free_wsi(wsi,
367 LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY
368 /* no protocol close */);
373 if (context->count_wsi_allocated == 0)
374 lws_libuv_kill(context);
377 LWS_VISIBLE uv_loop_t *
378 lws_uv_getloop(struct lws_context *context, int tsi)
380 if (context->pt[tsi].io_loop_uv && LWS_LIBUV_ENABLED(context))
381 return context->pt[tsi].io_loop_uv;
387 lws_libuv_closewsi(uv_handle_t* handle)
389 struct lws *n = NULL, *wsi = (struct lws *)(((char *)handle) -
390 (char *)(&n->w_read.uv_watcher));
391 struct lws_context *context = lws_get_context(wsi);
393 lws_close_free_wsi_final(wsi);
395 if (context->requested_kill && context->count_wsi_allocated == 0)
396 lws_libuv_kill(context);
400 lws_libuv_closehandle(struct lws *wsi)
402 struct lws_context *context = lws_get_context(wsi);
404 /* required to defer actual deletion until libuv has processed it */
406 uv_close((uv_handle_t*)&wsi->w_read.uv_watcher, lws_libuv_closewsi);
408 if (context->requested_kill && context->count_wsi_allocated == 0)
409 lws_libuv_kill(context);
412 #if defined(LWS_WITH_PLUGINS) && (UV_VERSION_MAJOR > 0)
415 lws_plat_plugins_init(struct lws_context * context, const char *d)
417 struct lws_plugin_capability lcaps;
418 struct lws_plugin *plugin;
419 lws_plugin_init_func initfunc;
433 if (!uv_fs_scandir(&loop, &req, d, 0, NULL)) {
434 lwsl_err("Scandir on %s failed\n", d);
438 lwsl_notice(" Plugins:\n");
440 while (uv_fs_scandir_next(&req, &dent) != UV_EOF) {
441 if (strlen(dent.name) < 7)
444 lwsl_notice(" %s\n", dent.name);
446 snprintf(path, sizeof(path) - 1, "%s/%s", d, dent.name);
447 if (uv_dlopen(path, &lib)) {
449 lwsl_err("Error loading DSO: %s\n", lib.errmsg);
452 /* we could open it, can we get his init function? */
453 m = snprintf(path, sizeof(path) - 1, "init_%s",
454 dent.name + 3 /* snip lib... */);
455 path[m - 3] = '\0'; /* snip the .so */
456 if (uv_dlsym(&lib, path, &v)) {
458 lwsl_err("Failed to get init on %s: %s",
459 dent.name, lib.errmsg);
462 initfunc = (lws_plugin_init_func)v;
463 lcaps.api_magic = LWS_PLUGIN_API_MAGIC;
464 m = initfunc(context, &lcaps);
466 lwsl_err("Initializing %s failed %d\n", dent.name, m);
470 plugin = lws_malloc(sizeof(*plugin));
475 plugin->list = context->plugin_list;
476 context->plugin_list = plugin;
477 strncpy(plugin->name, dent.name, sizeof(plugin->name) - 1);
478 plugin->name[sizeof(plugin->name) - 1] = '\0';
480 plugin->caps = lcaps;
481 context->plugin_protocol_count += lcaps.count_protocols;
482 context->plugin_extension_count += lcaps.count_extensions;
491 uv_fs_req_cleanup(&req);
492 uv_loop_close(&loop);
499 lws_plat_plugins_destroy(struct lws_context * context)
501 struct lws_plugin *plugin = context->plugin_list, *p;
502 lws_plugin_destroy_func func;
510 lwsl_notice("%s\n", __func__);
514 m = snprintf(path, sizeof(path) - 1, "destroy_%s", plugin->name + 3);
517 if (uv_dlsym(&plugin->lib, path, &v)) {
518 uv_dlerror(&plugin->lib);
519 lwsl_err("Failed to get init on %s: %s",
520 plugin->name, plugin->lib.errmsg);
522 func = (lws_plugin_destroy_func)v;
525 lwsl_err("Destroying %s failed %d\n",
535 context->plugin_list = NULL;