2 * libevent compatibility layer
4 * Copyright (c) 2007,2008,2009,2010,2012 Marc Alexander Lehmann <libev@schmorp.de>
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
51 # define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base
52 # define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
58 /* never accessed, will always be cast from/to ev_loop */
64 static struct event_base *ev_x_cur;
67 ev_tv_get (struct timeval *tv)
71 ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6;
72 return after ? after : 1e-6;
78 #define EVENT_STRINGIFY(s) # s
79 #define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b)
82 event_get_version (void)
84 /* returns ABI, not API or library, version */
85 return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
89 event_get_method (void)
94 void *event_init (void)
98 ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
100 ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
102 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
104 ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
111 event_base_get_method (const struct event_base *base)
117 event_base_new (void)
120 return (struct event_base *)ev_loop_new (EVFLAG_AUTO);
122 assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY"));
127 void event_base_free (struct event_base *base)
132 if (!ev_is_default_loop (loop))
133 ev_loop_destroy (loop);
137 int event_dispatch (void)
139 return event_base_dispatch (ev_x_cur);
143 void event_set_log_callback (event_log_cb cb)
149 int event_loop (int flags)
151 return event_base_loop (ev_x_cur, flags);
154 int event_loopexit (struct timeval *tv)
156 return event_base_loopexit (ev_x_cur, tv);
159 event_callback_fn event_get_callback
160 (const struct event *ev)
162 return ev->ev_callback;
166 ev_x_cb (struct event *ev, int revents)
168 revents &= EV_READ | EV_WRITE | EV_TIMER | EV_SIGNAL;
170 ev->ev_res = revents;
171 ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
175 ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
177 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));
179 if (revents & EV_ERROR)
182 ev_x_cb (ev, revents);
186 ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
188 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
190 if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
193 ev_x_cb (ev, revents);
197 ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
199 struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));
203 ev_x_cb (ev, revents);
206 void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
208 if (events & EV_SIGNAL)
209 ev_init (&ev->iosig.sig, ev_x_cb_sig);
211 ev_init (&ev->iosig.io, ev_x_cb_io);
213 ev_init (&ev->to, ev_x_cb_to);
215 ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
217 ev->ev_events = events;
219 ev->ev_callback = cb;
222 ev->ev_flags = EVLIST_INIT;
225 int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
227 return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
230 int event_add (struct event *ev, struct timeval *tv)
234 if (ev->ev_events & EV_SIGNAL)
236 if (!ev_is_active (&ev->iosig.sig))
238 ev_signal_set (&ev->iosig.sig, ev->ev_fd);
239 ev_signal_start (EV_A_ &ev->iosig.sig);
241 ev->ev_flags |= EVLIST_SIGNAL;
244 else if (ev->ev_events & (EV_READ | EV_WRITE))
246 if (!ev_is_active (&ev->iosig.io))
248 ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
249 ev_io_start (EV_A_ &ev->iosig.io);
251 ev->ev_flags |= EVLIST_INSERTED;
257 ev->to.repeat = ev_tv_get (tv);
258 ev_timer_again (EV_A_ &ev->to);
259 ev->ev_flags |= EVLIST_TIMEOUT;
263 ev_timer_stop (EV_A_ &ev->to);
264 ev->ev_flags &= ~EVLIST_TIMEOUT;
267 ev->ev_flags |= EVLIST_ACTIVE;
272 int event_del (struct event *ev)
276 if (ev->ev_events & EV_SIGNAL)
277 ev_signal_stop (EV_A_ &ev->iosig.sig);
278 else if (ev->ev_events & (EV_READ | EV_WRITE))
279 ev_io_stop (EV_A_ &ev->iosig.io);
281 if (ev_is_active (&ev->to))
282 ev_timer_stop (EV_A_ &ev->to);
284 ev->ev_flags = EVLIST_INIT;
289 void event_active (struct event *ev, int res, short ncalls)
293 if (res & EV_TIMEOUT)
294 ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
297 ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
299 if (res & (EV_READ | EV_WRITE))
300 ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
303 int event_pending (struct event *ev, short events, struct timeval *tv)
308 if (ev->ev_events & EV_SIGNAL)
311 if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
312 revents |= EV_SIGNAL;
314 else if (ev->ev_events & (EV_READ | EV_WRITE))
317 if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
318 revents |= ev->ev_events & (EV_READ | EV_WRITE);
321 if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
323 revents |= EV_TIMEOUT;
327 ev_tstamp at = ev_now (EV_A);
329 tv->tv_sec = (long)at;
330 tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
334 return events & revents;
337 int event_priority_init (int npri)
339 return event_base_priority_init (ev_x_cur, npri);
342 int event_priority_set (struct event *ev, int pri)
349 int event_base_set (struct event_base *base, struct event *ev)
356 int event_base_loop (struct event_base *base, int flags)
360 return !ev_run (EV_A_ flags);
363 int event_base_dispatch (struct event_base *base)
365 return event_base_loop (base, 0);
369 ev_x_loopexit_cb (int revents, void *base)
373 ev_break (EV_A_ EVBREAK_ONE);
376 int event_base_loopexit (struct event_base *base, struct timeval *tv)
378 ev_tstamp after = ev_tv_get (tv);
381 ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
389 void (*cb)(int, short, void *);
394 ev_x_once_cb (int revents, void *arg)
396 struct ev_x_once *once = (struct ev_x_once *)arg;
398 once->cb (once->fd, (short)revents, once->arg);
402 int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
404 struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
414 ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
419 int event_base_priority_init (struct event_base *base, int npri)