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 (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_accept_cb(uv_poll_t *watcher, int status, int revents)
36 struct lws_io_watcher *lws_io = container_of(watcher,
37 struct lws_io_watcher, uv_watcher);
38 struct lws_context *context = lws_io->context;
39 struct lws_pollfd eventfd;
44 eventfd.fd = watcher->io_watcher.fd;
47 if (revents & UV_READABLE) {
48 eventfd.events |= LWS_POLLIN;
49 eventfd.revents |= LWS_POLLIN;
51 if (revents & UV_WRITABLE) {
52 eventfd.events |= LWS_POLLOUT;
53 eventfd.revents |= LWS_POLLOUT;
55 lws_service_fd(context, &eventfd);
59 lws_uv_sigint_cb(uv_loop_t *loop, uv_signal_t *watcher, int revents)
65 lws_uv_sigint_cfg(struct lws_context *context, int use_uv_sigint,
66 lws_uv_signal_cb_t *cb)
68 context->use_ev_sigint = use_uv_sigint;
70 context->lws_uv_sigint_cb = cb;
72 context->lws_uv_sigint_cb = &lws_uv_sigint_cb;
77 static const int sigs[] = { SIGINT, SIGTERM, SIGSEGV, SIGFPE };
80 lws_uv_initloop(struct lws_context *context, uv_loop_t *loop, uv_signal_cb cb,
83 struct lws_context_per_thread *pt = &context->pt[tsi];
84 struct lws *wsi = wsi_from_fd(context, pt->lserv_fd);
88 loop = lws_malloc(sizeof(*loop));
90 pt->ev_loop_foreign = 0;
92 pt->ev_loop_foreign = 1;
94 pt->io_loop_uv = loop;
96 assert(ARRAY_SIZE(sigs) <= ARRAY_SIZE(pt->signals));
97 for (n = 0; n < ARRAY_SIZE(sigs); n++) {
98 uv_signal_init(loop, &pt->signals[n]);
99 uv_signal_start(&pt->signals[n], cb, sigs[n]);
103 * Initialize the accept wsi read watcher with the listening socket
104 * and register a callback for read operations
106 * We have to do it here because the uv loop(s) are not
107 * initialized until after context creation.
110 wsi->w_read.context = context;
111 uv_poll_init(pt->io_loop_uv, &wsi->w_read.uv_watcher, pt->lserv_fd);
112 uv_poll_start(&wsi->w_read.uv_watcher, UV_READABLE, lws_accept_cb);
118 void lws_uv_close_cb(uv_handle_t *handle)
123 void lws_uv_walk_cb(uv_handle_t *handle, void *arg)
125 uv_close(handle, lws_uv_close_cb);
129 lws_libuv_destroyloop(struct lws_context *context, int tsi)
131 struct lws_context_per_thread *pt = &context->pt[tsi];
134 if (!(context->options & LWS_SERVER_OPTION_LIBUV))
140 if (context->use_ev_sigint)
141 uv_signal_stop(&pt->w_sigint.uv_watcher);
142 for (m = 0; m < ARRAY_SIZE(sigs); m++)
143 uv_signal_stop(&pt->signals[m]);
144 if (!pt->ev_loop_foreign) {
145 uv_stop(pt->io_loop_uv);
146 uv_walk(pt->io_loop_uv, lws_uv_walk_cb, NULL);
147 while (uv_run(pt->io_loop_uv, UV_RUN_NOWAIT));
148 m = uv_loop_close(pt->io_loop_uv);
150 lwsl_debug("%s: uv_loop_close: UV_EBUSY\n", __func__);
151 lws_free(pt->io_loop_uv);
156 lws_libuv_accept(struct lws *wsi, int accept_fd)
158 struct lws_context *context = lws_get_context(wsi);
159 struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
161 if (!LWS_LIBUV_ENABLED(context))
164 lwsl_debug("%s: new wsi %p\n", __func__, wsi);
166 wsi->w_read.context = context;
168 uv_poll_init(pt->io_loop_uv, &wsi->w_read.uv_watcher, accept_fd);
172 lws_libuv_io(struct lws *wsi, int flags)
174 struct lws_context *context = lws_get_context(wsi);
175 struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
176 int current_events = wsi->w_read.uv_watcher.io_watcher.pevents &
177 (UV_READABLE | UV_WRITABLE);
178 struct lws_io_watcher *w = &wsi->w_read;
180 if (!LWS_LIBUV_ENABLED(context))
183 lwsl_debug("%s: wsi: %p, flags:%d\n", __func__, wsi, flags);
185 if (!pt->io_loop_uv) {
186 lwsl_info("%s: no io loop yet\n", __func__);
190 assert((flags & (LWS_EV_START | LWS_EV_STOP)) &&
191 (flags & (LWS_EV_READ | LWS_EV_WRITE)));
193 if (flags & LWS_EV_START) {
194 if (flags & LWS_EV_WRITE)
195 current_events |= UV_WRITABLE;
197 if (flags & LWS_EV_READ)
198 current_events |= UV_READABLE;
200 uv_poll_start(&w->uv_watcher, current_events, lws_accept_cb);
202 if (flags & LWS_EV_WRITE)
203 current_events &= ~UV_WRITABLE;
205 if (flags & LWS_EV_READ)
206 current_events &= ~UV_READABLE;
208 if (!(current_events & (UV_READABLE | UV_WRITABLE)))
209 uv_poll_stop(&w->uv_watcher);
211 uv_poll_start(&w->uv_watcher, current_events,
217 lws_libuv_init_fd_table(struct lws_context *context)
221 if (!LWS_LIBUV_ENABLED(context))
224 for (n = 0; n < context->count_threads; n++) {
225 context->pt[n].w_sigint.context = context;
232 lws_libuv_run(const struct lws_context *context, int tsi)
234 if (context->pt[tsi].io_loop_uv && LWS_LIBUV_ENABLED(context))
235 uv_run(context->pt[tsi].io_loop_uv, 0);
239 lws_libuv_kill(const struct lws_context *context)
243 for (n = 0; n < context->count_threads; n++)
244 if (context->pt[n].io_loop_uv && LWS_LIBUV_ENABLED(context))
245 uv_stop(context->pt[n].io_loop_uv);
249 * This does not actually stop the event loop. The reason is we have to pass
250 * libuv handle closures through its event loop. So this tries to close all
251 * wsi, and set a flag; when all the wsi closures are finalized then we
252 * actually stop the libuv event loops.
256 lws_libuv_stop(struct lws_context *context)
258 struct lws_context_per_thread *pt;
261 context->requested_kill = 1;
263 m = context->count_threads;
264 context->being_destroyed = 1;
267 pt = &context->pt[m];
269 for (n = 0; (unsigned int)n < context->pt[m].fds_count; n++) {
270 struct lws *wsi = wsi_from_fd(context, pt->fds[n].fd);
274 lws_close_free_wsi(wsi,
275 LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY
276 /* no protocol close */);
281 if (context->count_wsi_allocated == 0)
282 lws_libuv_kill(context);
285 LWS_VISIBLE uv_loop_t *
286 lws_uv_getloop(struct lws_context *context, int tsi)
288 if (context->pt[tsi].io_loop_uv && LWS_LIBUV_ENABLED(context))
289 return context->pt[tsi].io_loop_uv;
295 lws_libuv_closewsi(uv_handle_t* handle)
297 struct lws *n = NULL, *wsi = (struct lws *)(((void *)handle) -
298 (void *)(&n->w_read.uv_watcher));
299 struct lws_context *context = lws_get_context(wsi);
301 lws_close_free_wsi_final(wsi);
303 if (context->requested_kill && context->count_wsi_allocated == 0)
304 lws_libuv_kill(context);
308 lws_libuv_closehandle(struct lws *wsi)
310 struct lws_context *context = lws_get_context(wsi);
312 /* required to defer actual deletion until libuv has processed it */
314 uv_close((uv_handle_t*)&wsi->w_read.uv_watcher, lws_libuv_closewsi);
316 if (context->requested_kill && context->count_wsi_allocated == 0)
317 lws_libuv_kill(context);