libev/event.c

/*
 * libevent compatibility layer
 *
 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 * 
 *   1.  Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 * 
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License ("GPL") version 2 or any later version,
 * in which case the provisions of the GPL are applicable instead of
 * the above. If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the BSD license, indicate your decision
 * by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under
 * either the BSD or the GPL.
 */

#include <stddef.h>
#include <stdlib.h>
#include <assert.h>

#ifdef EV_EVENT_H
# include EV_EVENT_H
#else
# include "event.h"
#endif

#if EV_MULTIPLICITY
# define dLOOPev struct ev_loop *loop = (struct ev_loop *)ev->ev_base
# define dLOOPbase struct ev_loop *loop = (struct ev_loop *)base
#else
# define dLOOPev
# define dLOOPbase
#endif

/* never accessed, will always be cast from/to ev_loop */
struct event_base
{
  int dummy;
};

static struct event_base *ev_x_cur;

static void
ev_tv_set (struct timeval *tv, ev_tstamp at)
{
  tv->tv_sec  = (long)at;
  tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
}

static ev_tstamp
ev_tv_get (struct timeval *tv)
{
  if (tv)
    return tv->tv_sec + tv->tv_usec * 1e-6;
  else
    return -1.;
}

#define EVENT_VERSION(a,b) # a "." # b

const char *event_get_version (void)
{
  return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
}

const char *event_get_method (void)
{
  return "libev";
}

void *event_init (void)
{
#if EV_MULTIPLICITY
  if (ev_x_cur)
    ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
  else
    ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
#else
  assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));

  ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
#endif

  return ev_x_cur;
}

void event_base_free (struct event_base *base)
{
  dLOOPbase;

#if EV_MULTIPLICITY
  if (ev_default_loop (EVFLAG_AUTO) != loop)
    ev_loop_destroy (loop);
#endif
}

int event_dispatch (void)
{
  return event_base_dispatch (ev_x_cur);
}

#ifdef EV_STANDALONE
void event_set_log_callback (event_log_cb cb)
{
  /* nop */
}
#endif

int event_loop (int flags)
{
  return event_base_loop (ev_x_cur, flags);
}

int event_loopexit (struct timeval *tv)
{
  return event_base_loopexit (ev_x_cur, tv);
}

static void
ev_x_cb (struct event *ev, int revents)
{
  revents &= EV_READ | EV_WRITE | EV_TIMEOUT | EV_SIGNAL;

  ev->ev_res = revents;
  ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
}

static void
ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
{
  struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.sig));

  if (revents & EV_ERROR)
    event_del (ev);

  ev_x_cb (ev, revents);
}

static void
ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
{
  struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));

  if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
    event_del (ev);

  ev_x_cb (ev, revents);
}

static void
ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
{
  struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, to));

  event_del (ev);

  ev_x_cb (ev, revents);
}

void event_set (struct event *ev, int fd, short events, void (*cb)(int, short, void *), void *arg)
{
  if (events & EV_SIGNAL)
    ev_init (&ev->iosig.sig, ev_x_cb_sig);
  else
    ev_init (&ev->iosig.io, ev_x_cb_io);

  ev_init (&ev->to, ev_x_cb_to);

  ev->ev_base     = ev_x_cur; /* not threadsafe, but it's how libevent works */
  ev->ev_fd       = fd;
  ev->ev_events   = events;
  ev->ev_pri      = 0;
  ev->ev_callback = cb;
  ev->ev_arg      = arg;
  ev->ev_res      = 0;
  ev->ev_flags    = EVLIST_INIT;
}

int event_once (int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
{
  return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
}

int event_add (struct event *ev, struct timeval *tv)
{
  dLOOPev;

  if (ev->ev_events & EV_SIGNAL)
    {
      if (!ev_is_active (&ev->iosig.sig))
        {
          ev_signal_set (&ev->iosig.sig, ev->ev_fd);
          ev_signal_start (EV_A_ &ev->iosig.sig);

          ev->ev_flags |= EVLIST_SIGNAL;
        }
    }
  else if (ev->ev_events & (EV_READ | EV_WRITE))
    {
      if (!ev_is_active (&ev->iosig.io))
        {
          ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
          ev_io_start (EV_A_ &ev->iosig.io);

          ev->ev_flags |= EVLIST_INSERTED;
        }
    }

  if (tv)
    {
      ev->to.repeat = ev_tv_get (tv);
      ev_timer_again (EV_A_ &ev->to);
      ev->ev_flags |= EVLIST_TIMEOUT;
    }
  else
    {
      ev_timer_stop (EV_A_ &ev->to);
      ev->ev_flags &= ~EVLIST_TIMEOUT;
    }

  ev->ev_flags |= EVLIST_ACTIVE;

  return 0;
}

int event_del (struct event *ev)
{
  dLOOPev;

  if (ev->ev_events & EV_SIGNAL)
    ev_signal_stop (EV_A_ &ev->iosig.sig);
  else if (ev->ev_events & (EV_READ | EV_WRITE))
    ev_io_stop (EV_A_ &ev->iosig.io);

  if (ev_is_active (&ev->to))
    ev_timer_stop (EV_A_ &ev->to);

  ev->ev_flags = EVLIST_INIT;

  return 0;
}

void event_active (struct event *ev, int res, short ncalls)
{
  dLOOPev;

  if (res & EV_TIMEOUT)
    ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);

  if (res & EV_SIGNAL)
    ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);

  if (res & (EV_READ | EV_WRITE))
    ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ | EV_WRITE));
}

int event_pending (struct event *ev, short events, struct timeval *tv)
{
  short revents = 0;
  dLOOPev;

  if (ev->ev_events & EV_SIGNAL)
    {
      /* sig */
      if (ev_is_active (&ev->iosig.sig) || ev_is_pending (&ev->iosig.sig))
        revents |= EV_SIGNAL;
    }
  else if (ev->ev_events & (EV_READ | EV_WRITE))
    {
      /* io */
      if (ev_is_active (&ev->iosig.io) || ev_is_pending (&ev->iosig.io))
        revents |= ev->ev_events & (EV_READ | EV_WRITE);
    }

  if (ev->ev_events & EV_TIMEOUT || ev_is_active (&ev->to) || ev_is_pending (&ev->to))
    {
      revents |= EV_TIMEOUT;

      if (tv)
        ev_tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */
    }

  return events & revents;
}

int event_priority_init (int npri)
{
  return event_base_priority_init (ev_x_cur, npri);
}

int event_priority_set (struct event *ev, int pri)
{
  ev->ev_pri = pri;

  return 0;
}

int event_base_set (struct event_base *base, struct event *ev)
{
  ev->ev_base = base;

  return 0;
}

int event_base_loop (struct event_base *base, int flags)
{
  dLOOPbase;

  ev_loop (EV_A_ flags);

  return 0;
}

int event_base_dispatch (struct event_base *base)
{
  return event_base_loop (base, 0);
}

static void
ev_x_loopexit_cb (int revents, void *base)
{
  dLOOPbase;

  ev_unloop (EV_A_ EVUNLOOP_ONE);
}

int event_base_loopexit (struct event_base *base, struct timeval *tv)
{
  ev_tstamp after = ev_tv_get (tv);
  dLOOPbase;

  ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);

  return 0;
}

struct ev_x_once
{
  int fd;
  void (*cb)(int, short, void *);
  void *arg;
};

static void
ev_x_once_cb (int revents, void *arg)
{
  struct ev_x_once *once = (struct ev_x_once *)arg;

  once->cb (once->fd, (short)revents, once->arg);
  free (once);
}

int event_base_once (struct event_base *base, int fd, short events, void (*cb)(int, short, void *), void *arg, struct timeval *tv)
{
  struct ev_x_once *once = (struct ev_x_once *)malloc (sizeof (struct ev_x_once));
  dLOOPbase;

  if (!once)
    return -1;

  once->fd  = fd;
  once->cb  = cb;
  once->arg = arg;

  ev_once (EV_A_ fd, events & (EV_READ | EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);

  return 0;
}

int event_base_priority_init (struct event_base *base, int npri)
{
  /*dLOOPbase;*/

  return 0;
}

Revision:	1.38
Committed:	Mon Nov 17 03:37:08 2008 UTC (15 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_51, rel-3_49
Changes since 1.37:	+0 -4 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* libevent compatibility layer
3	*
4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.
12	*
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.
16	*
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.
27	*
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.
38	*/
39
40	#include <stddef.h>
41	#include <stdlib.h>
42	#include <assert.h>
43
44	#ifdef EV_EVENT_H
45	# include EV_EVENT_H
46	#else
47	# include "event.h"
48	#endif
49
50	#if EV_MULTIPLICITY
51	# define dLOOPev struct ev_loop loop = (struct ev_loop )ev->ev_base
52	# define dLOOPbase struct ev_loop loop = (struct ev_loop )base
53	#else
54	# define dLOOPev
55	# define dLOOPbase
56	#endif
57
58	/* never accessed, will always be cast from/to ev_loop */
59	struct event_base
60	{
61	int dummy;
62	};
63
64	static struct event_base *ev_x_cur;
65
66	static void
67	ev_tv_set (struct timeval *tv, ev_tstamp at)
68	{
69	tv->tv_sec = (long)at;
70	tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
71	}
72
73	static ev_tstamp
74	ev_tv_get (struct timeval *tv)
75	{
76	if (tv)
77	return tv->tv_sec + tv->tv_usec * 1e-6;
78	else
79	return -1.;
80	}
81
82	#define EVENT_VERSION(a,b) # a "." # b
83
84	const char *event_get_version (void)
85	{
86	return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
87	}
88
89	const char *event_get_method (void)
90	{
91	return "libev";
92	}
93
94	void *event_init (void)
95	{
96	#if EV_MULTIPLICITY
97	if (ev_x_cur)
98	ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
99	else
100	ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
101	#else
102	assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
103
104	ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
105	#endif
106
107	return ev_x_cur;
108	}
109
110	void event_base_free (struct event_base *base)
111	{
112	dLOOPbase;
113
114	#if EV_MULTIPLICITY
115	if (ev_default_loop (EVFLAG_AUTO) != loop)
116	ev_loop_destroy (loop);
117	#endif
118	}
119
120	int event_dispatch (void)
121	{
122	return event_base_dispatch (ev_x_cur);
123	}
124
125	#ifdef EV_STANDALONE
126	void event_set_log_callback (event_log_cb cb)
127	{
128	/* nop */
129	}
130	#endif
131
132	int event_loop (int flags)
133	{
134	return event_base_loop (ev_x_cur, flags);
135	}
136
137	int event_loopexit (struct timeval *tv)
138	{
139	return event_base_loopexit (ev_x_cur, tv);
140	}
141
142	static void
143	ev_x_cb (struct event *ev, int revents)
144	{
145	revents &= EV_READ \| EV_WRITE \| EV_TIMEOUT \| EV_SIGNAL;
146
147	ev->ev_res = revents;
148	ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
149	}
150
151	static void
152	ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
153	{
154	struct event ev = (struct event )(((char *)w) - offsetof (struct event, iosig.sig));
155
156	if (revents & EV_ERROR)
157	event_del (ev);
158
159	ev_x_cb (ev, revents);
160	}
161
162	static void
163	ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
164	{
165	struct event ev = (struct event )(((char *)w) - offsetof (struct event, iosig.io));
166
167	if ((revents & EV_ERROR) \|\| !(ev->ev_events & EV_PERSIST))
168	event_del (ev);
169
170	ev_x_cb (ev, revents);
171	}
172
173	static void
174	ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
175	{
176	struct event ev = (struct event )(((char *)w) - offsetof (struct event, to));
177
178	event_del (ev);
179
180	ev_x_cb (ev, revents);
181	}
182
183	void event_set (struct event ev, int fd, short events, void (cb)(int, short, void ), void arg)
184	{
185	if (events & EV_SIGNAL)
186	ev_init (&ev->iosig.sig, ev_x_cb_sig);
187	else
188	ev_init (&ev->iosig.io, ev_x_cb_io);
189
190	ev_init (&ev->to, ev_x_cb_to);
191
192	ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
193	ev->ev_fd = fd;
194	ev->ev_events = events;
195	ev->ev_pri = 0;
196	ev->ev_callback = cb;
197	ev->ev_arg = arg;
198	ev->ev_res = 0;
199	ev->ev_flags = EVLIST_INIT;
200	}
201
202	int event_once (int fd, short events, void (cb)(int, short, void ), void arg, struct timeval tv)
203	{
204	return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
205	}
206
207	int event_add (struct event ev, struct timeval tv)
208	{
209	dLOOPev;
210
211	if (ev->ev_events & EV_SIGNAL)
212	{
213	if (!ev_is_active (&ev->iosig.sig))
214	{
215	ev_signal_set (&ev->iosig.sig, ev->ev_fd);
216	ev_signal_start (EV_A_ &ev->iosig.sig);
217
218	ev->ev_flags \|= EVLIST_SIGNAL;
219	}
220	}
221	else if (ev->ev_events & (EV_READ \| EV_WRITE))
222	{
223	if (!ev_is_active (&ev->iosig.io))
224	{
225	ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ \| EV_WRITE));
226	ev_io_start (EV_A_ &ev->iosig.io);
227
228	ev->ev_flags \|= EVLIST_INSERTED;
229	}
230	}
231
232	if (tv)
233	{
234	ev->to.repeat = ev_tv_get (tv);
235	ev_timer_again (EV_A_ &ev->to);
236	ev->ev_flags \|= EVLIST_TIMEOUT;
237	}
238	else
239	{
240	ev_timer_stop (EV_A_ &ev->to);
241	ev->ev_flags &= ~EVLIST_TIMEOUT;
242	}
243
244	ev->ev_flags \|= EVLIST_ACTIVE;
245
246	return 0;
247	}
248
249	int event_del (struct event *ev)
250	{
251	dLOOPev;
252
253	if (ev->ev_events & EV_SIGNAL)
254	ev_signal_stop (EV_A_ &ev->iosig.sig);
255	else if (ev->ev_events & (EV_READ \| EV_WRITE))
256	ev_io_stop (EV_A_ &ev->iosig.io);
257
258	if (ev_is_active (&ev->to))
259	ev_timer_stop (EV_A_ &ev->to);
260
261	ev->ev_flags = EVLIST_INIT;
262
263	return 0;
264	}
265
266	void event_active (struct event *ev, int res, short ncalls)
267	{
268	dLOOPev;
269
270	if (res & EV_TIMEOUT)
271	ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
272
273	if (res & EV_SIGNAL)
274	ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
275
276	if (res & (EV_READ \| EV_WRITE))
277	ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ \| EV_WRITE));
278	}
279
280	int event_pending (struct event ev, short events, struct timeval tv)
281	{
282	short revents = 0;
283	dLOOPev;
284
285	if (ev->ev_events & EV_SIGNAL)
286	{
287	/* sig */
288	if (ev_is_active (&ev->iosig.sig) \|\| ev_is_pending (&ev->iosig.sig))
289	revents \|= EV_SIGNAL;
290	}
291	else if (ev->ev_events & (EV_READ \| EV_WRITE))
292	{
293	/* io */
294	if (ev_is_active (&ev->iosig.io) \|\| ev_is_pending (&ev->iosig.io))
295	revents \|= ev->ev_events & (EV_READ \| EV_WRITE);
296	}
297
298	if (ev->ev_events & EV_TIMEOUT \|\| ev_is_active (&ev->to) \|\| ev_is_pending (&ev->to))
299	{
300	revents \|= EV_TIMEOUT;
301
302	if (tv)
303	ev_tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */
304	}
305
306	return events & revents;
307	}
308
309	int event_priority_init (int npri)
310	{
311	return event_base_priority_init (ev_x_cur, npri);
312	}
313
314	int event_priority_set (struct event *ev, int pri)
315	{
316	ev->ev_pri = pri;
317
318	return 0;
319	}
320
321	int event_base_set (struct event_base base, struct event ev)
322	{
323	ev->ev_base = base;
324
325	return 0;
326	}
327
328	int event_base_loop (struct event_base *base, int flags)
329	{
330	dLOOPbase;
331
332	ev_loop (EV_A_ flags);
333
334	return 0;
335	}
336
337	int event_base_dispatch (struct event_base *base)
338	{
339	return event_base_loop (base, 0);
340	}
341
342	static void
343	ev_x_loopexit_cb (int revents, void *base)
344	{
345	dLOOPbase;
346
347	ev_unloop (EV_A_ EVUNLOOP_ONE);
348	}
349
350	int event_base_loopexit (struct event_base base, struct timeval tv)
351	{
352	ev_tstamp after = ev_tv_get (tv);
353	dLOOPbase;
354
355	ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
356
357	return 0;
358	}
359
360	struct ev_x_once
361	{
362	int fd;
363	void (cb)(int, short, void );
364	void *arg;
365	};
366
367	static void
368	ev_x_once_cb (int revents, void *arg)
369	{
370	struct ev_x_once once = (struct ev_x_once )arg;
371
372	once->cb (once->fd, (short)revents, once->arg);
373	free (once);
374	}
375
376	int event_base_once (struct event_base base, int fd, short events, void (cb)(int, short, void ), void arg, struct timeval *tv)
377	{
378	struct ev_x_once once = (struct ev_x_once )malloc (sizeof (struct ev_x_once));
379	dLOOPbase;
380
381	if (!once)
382	return -1;
383
384	once->fd = fd;
385	once->cb = cb;
386	once->arg = arg;
387
388	ev_once (EV_A_ fd, events & (EV_READ \| EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
389
390	return 0;
391	}
392
393	int event_base_priority_init (struct event_base *base, int npri)
394	{
395	/dLOOPbase;/
396
397	return 0;
398	}
399