| /* |
| * libwebsockets - small server side websockets and web server implementation |
| * |
| * Copyright (C) 2010-2014 Andy Green <andy@warmcat.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation: |
| * version 2.1 of the License. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| * MA 02110-1301 USA |
| */ |
| |
| #include "private-libwebsockets.h" |
| |
| void lws_feature_status_libev(struct lws_context_creation_info *info) |
| { |
| if (lws_check_opt(info->options, LWS_SERVER_OPTION_LIBEV)) |
| lwsl_notice("libev support compiled in and enabled\n"); |
| else |
| lwsl_notice("libev support compiled in but disabled\n"); |
| } |
| |
| static void |
| lws_accept_cb(struct ev_loop *loop, struct ev_io *watcher, int revents) |
| { |
| struct lws_io_watcher *lws_io = lws_container_of(watcher, |
| struct lws_io_watcher, ev_watcher); |
| struct lws_context *context = lws_io->context; |
| struct lws_pollfd eventfd; |
| |
| if (revents & EV_ERROR) |
| return; |
| |
| eventfd.fd = watcher->fd; |
| eventfd.events = 0; |
| eventfd.revents = EV_NONE; |
| if (revents & EV_READ) { |
| eventfd.events |= LWS_POLLIN; |
| eventfd.revents |= LWS_POLLIN; |
| } |
| if (revents & EV_WRITE) { |
| eventfd.events |= LWS_POLLOUT; |
| eventfd.revents |= LWS_POLLOUT; |
| } |
| lws_service_fd(context, &eventfd); |
| } |
| |
| LWS_VISIBLE void |
| lws_ev_sigint_cb(struct ev_loop *loop, struct ev_signal *watcher, int revents) |
| { |
| ev_break(loop, EVBREAK_ALL); |
| } |
| |
| LWS_VISIBLE int |
| lws_ev_sigint_cfg(struct lws_context *context, int use_ev_sigint, |
| lws_ev_signal_cb_t *cb) |
| { |
| context->use_ev_sigint = use_ev_sigint; |
| if (cb) |
| context->lws_ev_sigint_cb = cb; |
| else |
| context->lws_ev_sigint_cb = &lws_ev_sigint_cb; |
| |
| return 0; |
| } |
| |
| LWS_VISIBLE int |
| lws_ev_initloop(struct lws_context *context, struct ev_loop *loop, int tsi) |
| { |
| struct ev_signal *w_sigint = &context->pt[tsi].w_sigint.ev_watcher; |
| struct ev_io *w_accept = &context->pt[tsi].w_accept.ev_watcher; |
| struct lws_vhost *vh = context->vhost_list; |
| const char * backend_name; |
| int status = 0; |
| int backend; |
| |
| if (!loop) |
| loop = ev_loop_new(0); |
| else |
| context->pt[tsi].ev_loop_foreign = 1; |
| |
| context->pt[tsi].io_loop_ev = loop; |
| |
| /* |
| * Initialize the accept w_accept with all the listening sockets |
| * and register a callback for read operations |
| */ |
| while (vh) { |
| if (vh->lserv_wsi) { |
| vh->lserv_wsi->w_read.context = context; |
| ev_io_init(w_accept, lws_accept_cb, vh->lserv_wsi->desc.sockfd, |
| EV_READ); |
| } |
| vh = vh->vhost_next; |
| } |
| ev_io_start(context->pt[tsi].io_loop_ev, w_accept); |
| |
| /* Register the signal watcher unless the user says not to */ |
| if (context->use_ev_sigint) { |
| ev_signal_init(w_sigint, context->lws_ev_sigint_cb, SIGINT); |
| ev_signal_start(context->pt[tsi].io_loop_ev, w_sigint); |
| } |
| backend = ev_backend(loop); |
| |
| switch (backend) { |
| case EVBACKEND_SELECT: |
| backend_name = "select"; |
| break; |
| case EVBACKEND_POLL: |
| backend_name = "poll"; |
| break; |
| case EVBACKEND_EPOLL: |
| backend_name = "epoll"; |
| break; |
| case EVBACKEND_KQUEUE: |
| backend_name = "kqueue"; |
| break; |
| case EVBACKEND_DEVPOLL: |
| backend_name = "/dev/poll"; |
| break; |
| case EVBACKEND_PORT: |
| backend_name = "Solaris 10 \"port\""; |
| break; |
| default: |
| backend_name = "Unknown libev backend"; |
| break; |
| } |
| |
| lwsl_notice(" libev backend: %s\n", backend_name); |
| |
| return status; |
| } |
| |
| void |
| lws_libev_destroyloop(struct lws_context *context, int tsi) |
| { |
| struct lws_context_per_thread *pt = &context->pt[tsi]; |
| |
| if (!lws_check_opt(context->options, LWS_SERVER_OPTION_LIBEV)) |
| return; |
| |
| if (!pt->io_loop_ev) |
| return; |
| |
| ev_io_stop(pt->io_loop_ev, &pt->w_accept.ev_watcher); |
| if (context->use_ev_sigint) |
| ev_signal_stop(pt->io_loop_ev, |
| &pt->w_sigint.ev_watcher); |
| if (!pt->ev_loop_foreign) |
| ev_loop_destroy(pt->io_loop_ev); |
| } |
| |
| LWS_VISIBLE void |
| lws_libev_accept(struct lws *new_wsi, lws_sock_file_fd_type desc) |
| { |
| struct lws_context *context = lws_get_context(new_wsi); |
| struct ev_io *r = &new_wsi->w_read.ev_watcher; |
| struct ev_io *w = &new_wsi->w_write.ev_watcher; |
| int fd; |
| |
| if (!LWS_LIBEV_ENABLED(context)) |
| return; |
| |
| if (new_wsi->mode == LWSCM_RAW_FILEDESC) |
| fd = desc.filefd; |
| else |
| fd = desc.sockfd; |
| |
| new_wsi->w_read.context = context; |
| new_wsi->w_write.context = context; |
| ev_io_init(r, lws_accept_cb, fd, EV_READ); |
| ev_io_init(w, lws_accept_cb, fd, EV_WRITE); |
| } |
| |
| LWS_VISIBLE void |
| lws_libev_io(struct lws *wsi, int flags) |
| { |
| struct lws_context *context = lws_get_context(wsi); |
| struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi]; |
| |
| if (!LWS_LIBEV_ENABLED(context)) |
| return; |
| |
| if (!pt->io_loop_ev) |
| return; |
| |
| assert((flags & (LWS_EV_START | LWS_EV_STOP)) && |
| (flags & (LWS_EV_READ | LWS_EV_WRITE))); |
| |
| if (flags & LWS_EV_START) { |
| if (flags & LWS_EV_WRITE) |
| ev_io_start(pt->io_loop_ev, &wsi->w_write.ev_watcher); |
| if (flags & LWS_EV_READ) |
| ev_io_start(pt->io_loop_ev, &wsi->w_read.ev_watcher); |
| } else { |
| if (flags & LWS_EV_WRITE) |
| ev_io_stop(pt->io_loop_ev, &wsi->w_write.ev_watcher); |
| if (flags & LWS_EV_READ) |
| ev_io_stop(pt->io_loop_ev, &wsi->w_read.ev_watcher); |
| } |
| } |
| |
| LWS_VISIBLE int |
| lws_libev_init_fd_table(struct lws_context *context) |
| { |
| int n; |
| |
| if (!LWS_LIBEV_ENABLED(context)) |
| return 0; |
| |
| for (n = 0; n < context->count_threads; n++) { |
| context->pt[n].w_accept.context = context; |
| context->pt[n].w_sigint.context = context; |
| } |
| |
| return 1; |
| } |
| |
| LWS_VISIBLE void |
| lws_libev_run(const struct lws_context *context, int tsi) |
| { |
| if (context->pt[tsi].io_loop_ev && LWS_LIBEV_ENABLED(context)) |
| ev_run(context->pt[tsi].io_loop_ev, 0); |
| } |