libev/event.c

/*
 * libevent compatibility layer
 *
 * Copyright (c) 2007,2008,2009,2010 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

/* same definition as in ev.c */
#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)

#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 ev_tstamp
ev_tv_get (struct timeval *tv)
{
  if (tv)
    {
      ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6;
      return after ? after : 1e-6;
    }
  else
    return -1.;
}

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

const char *event_get_version (void)
{
  /* returns ABI, not API or library, version */
  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 (("libev: 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_TIMER | 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_run (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_break (EV_A_ EVBREAK_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:	1.46
Committed:	Sun Oct 24 17:19:47 2010 UTC (13 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.45:	+3 -0 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* libevent compatibility layer
3	*
4	* Copyright (c) 2007,2008,2009,2010 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	/* same definition as in ev.c */
51	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
52
53	#if EV_MULTIPLICITY
54	# define dLOOPev struct ev_loop loop = (struct ev_loop )ev->ev_base
55	# define dLOOPbase struct ev_loop loop = (struct ev_loop )base
56	#else
57	# define dLOOPev
58	# define dLOOPbase
59	#endif
60
61	/* never accessed, will always be cast from/to ev_loop */
62	struct event_base
63	{
64	int dummy;
65	};
66
67	static struct event_base *ev_x_cur;
68
69	static ev_tstamp
70	ev_tv_get (struct timeval *tv)
71	{
72	if (tv)
73	{
74	ev_tstamp after = tv->tv_sec + tv->tv_usec * 1e-6;
75	return after ? after : 1e-6;
76	}
77	else
78	return -1.;
79	}
80
81	#define EVENT_STRINGIFY(s) # s
82	#define EVENT_VERSION(a,b) EVENT_STRINGIFY (a) "." EVENT_STRINGIFY (b)
83
84	const char *event_get_version (void)
85	{
86	/* returns ABI, not API or library, version */
87	return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
88	}
89
90	const char *event_get_method (void)
91	{
92	return "libev";
93	}
94
95	void *event_init (void)
96	{
97	#if EV_MULTIPLICITY
98	if (ev_x_cur)
99	ev_x_cur = (struct event_base *)ev_loop_new (EVFLAG_AUTO);
100	else
101	ev_x_cur = (struct event_base *)ev_default_loop (EVFLAG_AUTO);
102	#else
103	assert (("libev: multiple event bases not supported when not compiled with EV_MULTIPLICITY", !ev_x_cur));
104
105	ev_x_cur = (struct event_base *)(long)ev_default_loop (EVFLAG_AUTO);
106	#endif
107
108	return ev_x_cur;
109	}
110
111	void event_base_free (struct event_base *base)
112	{
113	dLOOPbase;
114
115	#if EV_MULTIPLICITY
116	if (ev_default_loop (EVFLAG_AUTO) != loop)
117	ev_loop_destroy (loop);
118	#endif
119	}
120
121	int event_dispatch (void)
122	{
123	return event_base_dispatch (ev_x_cur);
124	}
125
126	#ifdef EV_STANDALONE
127	void event_set_log_callback (event_log_cb cb)
128	{
129	/* nop */
130	}
131	#endif
132
133	int event_loop (int flags)
134	{
135	return event_base_loop (ev_x_cur, flags);
136	}
137
138	int event_loopexit (struct timeval *tv)
139	{
140	return event_base_loopexit (ev_x_cur, tv);
141	}
142
143	static void
144	ev_x_cb (struct event *ev, int revents)
145	{
146	revents &= EV_READ \| EV_WRITE \| EV_TIMER \| EV_SIGNAL;
147
148	ev->ev_res = revents;
149	ev->ev_callback (ev->ev_fd, (short)revents, ev->ev_arg);
150	}
151
152	static void
153	ev_x_cb_sig (EV_P_ struct ev_signal *w, int revents)
154	{
155	struct event ev = (struct event )(((char *)w) - offsetof (struct event, iosig.sig));
156
157	if (revents & EV_ERROR)
158	event_del (ev);
159
160	ev_x_cb (ev, revents);
161	}
162
163	static void
164	ev_x_cb_io (EV_P_ struct ev_io *w, int revents)
165	{
166	struct event ev = (struct event )(((char *)w) - offsetof (struct event, iosig.io));
167
168	if ((revents & EV_ERROR) \|\| !(ev->ev_events & EV_PERSIST))
169	event_del (ev);
170
171	ev_x_cb (ev, revents);
172	}
173
174	static void
175	ev_x_cb_to (EV_P_ struct ev_timer *w, int revents)
176	{
177	struct event ev = (struct event )(((char *)w) - offsetof (struct event, to));
178
179	event_del (ev);
180
181	ev_x_cb (ev, revents);
182	}
183
184	void event_set (struct event ev, int fd, short events, void (cb)(int, short, void ), void arg)
185	{
186	if (events & EV_SIGNAL)
187	ev_init (&ev->iosig.sig, ev_x_cb_sig);
188	else
189	ev_init (&ev->iosig.io, ev_x_cb_io);
190
191	ev_init (&ev->to, ev_x_cb_to);
192
193	ev->ev_base = ev_x_cur; /* not threadsafe, but it's how libevent works */
194	ev->ev_fd = fd;
195	ev->ev_events = events;
196	ev->ev_pri = 0;
197	ev->ev_callback = cb;
198	ev->ev_arg = arg;
199	ev->ev_res = 0;
200	ev->ev_flags = EVLIST_INIT;
201	}
202
203	int event_once (int fd, short events, void (cb)(int, short, void ), void arg, struct timeval tv)
204	{
205	return event_base_once (ev_x_cur, fd, events, cb, arg, tv);
206	}
207
208	int event_add (struct event ev, struct timeval tv)
209	{
210	dLOOPev;
211
212	if (ev->ev_events & EV_SIGNAL)
213	{
214	if (!ev_is_active (&ev->iosig.sig))
215	{
216	ev_signal_set (&ev->iosig.sig, ev->ev_fd);
217	ev_signal_start (EV_A_ &ev->iosig.sig);
218
219	ev->ev_flags \|= EVLIST_SIGNAL;
220	}
221	}
222	else if (ev->ev_events & (EV_READ \| EV_WRITE))
223	{
224	if (!ev_is_active (&ev->iosig.io))
225	{
226	ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ \| EV_WRITE));
227	ev_io_start (EV_A_ &ev->iosig.io);
228
229	ev->ev_flags \|= EVLIST_INSERTED;
230	}
231	}
232
233	if (tv)
234	{
235	ev->to.repeat = ev_tv_get (tv);
236	ev_timer_again (EV_A_ &ev->to);
237	ev->ev_flags \|= EVLIST_TIMEOUT;
238	}
239	else
240	{
241	ev_timer_stop (EV_A_ &ev->to);
242	ev->ev_flags &= ~EVLIST_TIMEOUT;
243	}
244
245	ev->ev_flags \|= EVLIST_ACTIVE;
246
247	return 0;
248	}
249
250	int event_del (struct event *ev)
251	{
252	dLOOPev;
253
254	if (ev->ev_events & EV_SIGNAL)
255	ev_signal_stop (EV_A_ &ev->iosig.sig);
256	else if (ev->ev_events & (EV_READ \| EV_WRITE))
257	ev_io_stop (EV_A_ &ev->iosig.io);
258
259	if (ev_is_active (&ev->to))
260	ev_timer_stop (EV_A_ &ev->to);
261
262	ev->ev_flags = EVLIST_INIT;
263
264	return 0;
265	}
266
267	void event_active (struct event *ev, int res, short ncalls)
268	{
269	dLOOPev;
270
271	if (res & EV_TIMEOUT)
272	ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
273
274	if (res & EV_SIGNAL)
275	ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
276
277	if (res & (EV_READ \| EV_WRITE))
278	ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ \| EV_WRITE));
279	}
280
281	int event_pending (struct event ev, short events, struct timeval tv)
282	{
283	short revents = 0;
284	dLOOPev;
285
286	if (ev->ev_events & EV_SIGNAL)
287	{
288	/* sig */
289	if (ev_is_active (&ev->iosig.sig) \|\| ev_is_pending (&ev->iosig.sig))
290	revents \|= EV_SIGNAL;
291	}
292	else if (ev->ev_events & (EV_READ \| EV_WRITE))
293	{
294	/* io */
295	if (ev_is_active (&ev->iosig.io) \|\| ev_is_pending (&ev->iosig.io))
296	revents \|= ev->ev_events & (EV_READ \| EV_WRITE);
297	}
298
299	if (ev->ev_events & EV_TIMEOUT \|\| ev_is_active (&ev->to) \|\| ev_is_pending (&ev->to))
300	{
301	revents \|= EV_TIMEOUT;
302
303	if (tv)
304	EV_TV_SET (tv, ev_now (EV_A)); /* not sure if this is right :) */
305	}
306
307	return events & revents;
308	}
309
310	int event_priority_init (int npri)
311	{
312	return event_base_priority_init (ev_x_cur, npri);
313	}
314
315	int event_priority_set (struct event *ev, int pri)
316	{
317	ev->ev_pri = pri;
318
319	return 0;
320	}
321
322	int event_base_set (struct event_base base, struct event ev)
323	{
324	ev->ev_base = base;
325
326	return 0;
327	}
328
329	int event_base_loop (struct event_base *base, int flags)
330	{
331	dLOOPbase;
332
333	ev_run (EV_A_ flags);
334
335	return 0;
336	}
337
338	int event_base_dispatch (struct event_base *base)
339	{
340	return event_base_loop (base, 0);
341	}
342
343	static void
344	ev_x_loopexit_cb (int revents, void *base)
345	{
346	dLOOPbase;
347
348	ev_break (EV_A_ EVBREAK_ONE);
349	}
350
351	int event_base_loopexit (struct event_base base, struct timeval tv)
352	{
353	ev_tstamp after = ev_tv_get (tv);
354	dLOOPbase;
355
356	ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., ev_x_loopexit_cb, (void *)base);
357
358	return 0;
359	}
360
361	struct ev_x_once
362	{
363	int fd;
364	void (cb)(int, short, void );
365	void *arg;
366	};
367
368	static void
369	ev_x_once_cb (int revents, void *arg)
370	{
371	struct ev_x_once once = (struct ev_x_once )arg;
372
373	once->cb (once->fd, (short)revents, once->arg);
374	free (once);
375	}
376
377	int event_base_once (struct event_base base, int fd, short events, void (cb)(int, short, void ), void arg, struct timeval *tv)
378	{
379	struct ev_x_once once = (struct ev_x_once )malloc (sizeof (struct ev_x_once));
380	dLOOPbase;
381
382	if (!once)
383	return -1;
384
385	once->fd = fd;
386	once->cb = cb;
387	once->arg = arg;
388
389	ev_once (EV_A_ fd, events & (EV_READ \| EV_WRITE), ev_tv_get (tv), ev_x_once_cb, (void *)once);
390
391	return 0;
392	}
393
394	int event_base_priority_init (struct event_base *base, int npri)
395	{
396	/dLOOPbase;/
397
398	return 0;
399	}
400