2 * libwebsockets - small server side websockets and web server implementation
4 * Copyright (C) 2010-2014 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"
24 void lws_feature_status_libevent(struct lws_context_creation_info *info)
26 if (lws_check_opt(info->options, LWS_SERVER_OPTION_LIBEVENT))
27 lwsl_notice("libevent support compiled in and enabled\n");
29 lwsl_notice("libevent support compiled in but disabled\n");
33 lws_event_cb(evutil_socket_t sock_fd, short revents, void *ctx)
35 struct lws_io_watcher *lws_io = (struct lws_io_watcher *)ctx;
36 struct lws_context *context = lws_io->context;
37 struct lws_pollfd eventfd;
39 if (revents & EV_TIMEOUT)
42 /* !!! EV_CLOSED doesn't exist in libevent2 */
43 #if LIBEVENT_VERSION_NUMBER < 0x02000000
44 if (revents & EV_CLOSED)
46 event_del(lws_io->event_watcher);
47 event_free(lws_io->event_watcher);
55 if (revents & EV_READ)
57 eventfd.events |= LWS_POLLIN;
58 eventfd.revents |= LWS_POLLIN;
60 if (revents & EV_WRITE)
62 eventfd.events |= LWS_POLLOUT;
63 eventfd.revents |= LWS_POLLOUT;
65 lws_service_fd(context, &eventfd);
69 lws_event_sigint_cb(evutil_socket_t sock_fd, short revents, void *ctx)
71 struct lws_context_per_thread *pt = ctx;
72 if (!pt->ev_loop_foreign)
73 event_base_loopbreak(pt->io_loop_event_base);
77 lws_event_sigint_cfg(struct lws_context *context, int use_event_sigint,
78 lws_event_signal_cb_t *cb)
80 context->use_ev_sigint = use_event_sigint;
82 context->lws_event_sigint_cb = cb;
84 context->lws_event_sigint_cb = &lws_event_sigint_cb;
90 lws_event_initloop(struct lws_context *context, struct event_base *loop,
95 context->pt[tsi].io_loop_event_base = event_base_new();
99 context->pt[tsi].ev_loop_foreign = 1;
100 context->pt[tsi].io_loop_event_base = loop;
104 * Initialize all events with the listening sockets
105 * and register a callback for read operations
107 struct lws_vhost *vh = context->vhost_list;
112 vh->lserv_wsi->w_read.context = context;
113 vh->lserv_wsi->w_read.event_watcher = event_new(
115 vh->lserv_wsi->desc.sockfd,
116 (EV_READ | EV_PERSIST),
118 &vh->lserv_wsi->w_read);
119 event_add(vh->lserv_wsi->w_read.event_watcher, NULL);
124 /* Register the signal watcher unless the user says not to */
125 if (context->use_ev_sigint)
127 struct event *w_sigint = evsignal_new(loop, SIGINT,
128 context->lws_event_sigint_cb, &context->pt[tsi]);
129 context->pt[tsi].w_sigint.event_watcher = w_sigint;
130 event_add(w_sigint, NULL);
137 lws_libevent_destroyloop(struct lws_context *context, int tsi)
139 if (!lws_check_opt(context->options, LWS_SERVER_OPTION_LIBEVENT))
142 struct lws_context_per_thread *pt = &context->pt[tsi];
143 if (!pt->io_loop_event_base)
147 * Free all events with the listening sockets
149 struct lws_vhost *vh = context->vhost_list;
154 event_free(vh->lserv_wsi->w_read.event_watcher);
155 vh->lserv_wsi->w_read.event_watcher = NULL;
160 if (context->use_ev_sigint)
161 event_free(pt->w_sigint.event_watcher);
162 if (!pt->ev_loop_foreign)
163 event_base_free(pt->io_loop_event_base);
167 lws_libevent_accept(struct lws *new_wsi, lws_sock_file_fd_type desc)
169 struct lws_context *context = lws_get_context(new_wsi);
170 if (!LWS_LIBEVENT_ENABLED(context))
173 new_wsi->w_read.context = context;
174 new_wsi->w_write.context = context;
176 // Initialize the event
177 struct lws_context_per_thread *pt = &context->pt[(int)new_wsi->tsi];
179 if (new_wsi->mode == LWSCM_RAW_FILEDESC)
183 new_wsi->w_read.event_watcher = event_new(pt->io_loop_event_base, fd,
184 (EV_READ | EV_PERSIST), lws_event_cb, &new_wsi->w_read);
185 new_wsi->w_write.event_watcher = event_new(pt->io_loop_event_base, fd,
186 (EV_WRITE | EV_PERSIST), lws_event_cb, &new_wsi->w_write);
190 lws_libevent_io(struct lws *wsi, int flags)
192 struct lws_context *context = lws_get_context(wsi);
194 if (!LWS_LIBEVENT_ENABLED(context))
197 struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
198 if (!pt->io_loop_event_base || context->being_destroyed)
201 assert((flags & (LWS_EV_START | LWS_EV_STOP)) &&
202 (flags & (LWS_EV_READ | LWS_EV_WRITE)));
204 if (flags & LWS_EV_START)
206 if (flags & LWS_EV_WRITE)
208 event_add(wsi->w_write.event_watcher, NULL);
210 if (flags & LWS_EV_READ)
212 event_add(wsi->w_read.event_watcher, NULL);
217 if (flags & LWS_EV_WRITE)
219 event_del(wsi->w_write.event_watcher);
221 if (flags & LWS_EV_READ)
223 event_del(wsi->w_read.event_watcher);
229 lws_libevent_init_fd_table(struct lws_context *context)
231 if (!LWS_LIBEVENT_ENABLED(context))
235 for (n = 0; n < context->count_threads; n++)
237 context->pt[n].w_sigint.context = context;
244 lws_libevent_run(const struct lws_context *context, int tsi)
246 // Run/Dispatch the event_base loop
247 if (context->pt[tsi].io_loop_event_base && LWS_LIBEVENT_ENABLED(context))
248 event_base_dispatch(context->pt[tsi].io_loop_event_base);