libev/event.c

/*
 * libevent compatibility layer
 *
 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, 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 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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

#ifndef WIN32
# include <sys/time.h>
#endif

#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 *x_cur;

static void
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
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 (x_cur)
    x_cur = (struct event_base *)ev_loop_new (EVMETHOD_AUTO);
  else
    x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO);
#else
  assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !x_cur));

  x_cur = (struct event_base *)(long)ev_default_loop (EVMETHOD_AUTO);
#endif

  return x_cur;
}

void event_base_free (struct event_base *base)
{
  dLOOPbase;

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

int event_dispatch (void)
{
  return event_base_dispatch (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 (x_cur, flags);
}

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

static void
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, revents, ev->ev_arg);
}

static void
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);

  x_cb (ev, revents);
}

static void
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)
    event_del (ev);
  else if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w))
    ev_io_stop (EV_A_ w);

  x_cb (ev, revents);
}

static void
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);

  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, x_cb_sig);
  else
    ev_init (&ev->iosig.io, x_cb_io);

  ev_init (&ev->to, x_cb_to);

  ev->ev_base     = x_cur; /* not threadsafe, but its like 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;
}

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

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

  /* disable all watchers */
  event_del (ev);

  if (ev->ev_events & EV_SIGNAL)
    {
      ev_signal_set (&ev->iosig.sig, ev->ev_fd);
      ev_signal_start (EV_A_ &ev->iosig.sig);
    }
  else if (ev->ev_events & (EV_READ | EV_WRITE))
    {
      ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ | EV_WRITE));
      ev_io_start (EV_A_ &ev->iosig.io);
    }

  if (tv)
    {
      ev_timer_set (&ev->to, tv_get (tv), 0.);
      ev_timer_start (EV_A_ &ev->to);
    }

  return 0;
}

int event_del (struct event *ev)
{
  dLOOPev;

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

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

  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)
        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 (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
x_loopexit_cb (int revents, void *base)
{
  dLOOPbase;

  ev_unloop (EV_A_ EVUNLOOP_ONCE);
}

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

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

  return -1;
}

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

static void
x_once_cb (int revents, void *arg)
{
  struct x_once *once = (struct x_once *)arg;

  once->cb (once->fd, 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 x_once *once = (struct x_once *)malloc (sizeof (struct 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), tv_get (tv), x_once_cb, (void *)once);

  return 0;
}

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

  return 0;
}

Revision:	1.25
Committed:	Fri Nov 9 21:48:23 2007 UTC (16 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.24:	+3 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	/*
2			* libevent compatibility layer
3			*
4			* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5			* All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions are
9			* met:
10			*
11			* * Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			*
14			* * Redistributions in binary form must reproduce the above
15			* copyright notice, this list of conditions and the following
16			* disclaimer in the documentation and/or other materials provided
17			* with the distribution.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20			* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21			* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22			* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23			* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25			* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29			* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30			*/
31
32			#include <stddef.h>
33			#include <stdlib.h>
34	root	1.10	#include <assert.h>
35	root	1.1
36	root	1.18	#ifndef WIN32
37			# include <sys/time.h>
38			#endif
39
40	root	1.24	#ifdef EV_EVENT_H
41			# include EV_EVENT_H
42			#else
43			# include "event.h"
44			#endif
45	root	1.1
46	root	1.9	#if EV_MULTIPLICITY
47			# define dLOOPev struct ev_loop loop = (struct ev_loop )ev->ev_base
48			# define dLOOPbase struct ev_loop loop = (struct ev_loop )base
49	root	1.8	#else
50			# define dLOOPev
51			# define dLOOPbase
52			#endif
53	root	1.7
54	root	1.9	/* never accessed, will always be cast from/to ev_loop */
55	root	1.1	struct event_base
56			{
57			int dummy;
58			};
59
60	root	1.10	static struct event_base *x_cur;
61	root	1.1
62			static void
63			tv_set (struct timeval *tv, ev_tstamp at)
64			{
65			tv->tv_sec = (long)at;
66			tv->tv_usec = (long)((at - (ev_tstamp)tv->tv_sec) * 1e6);
67			}
68
69			static ev_tstamp
70			tv_get (struct timeval *tv)
71			{
72			if (tv)
73			return tv->tv_sec + tv->tv_usec * 1e-6;
74			else
75			return -1.;
76			}
77
78			#define EVENT_VERSION(a,b) # a "." # b
79
80			const char *event_get_version (void)
81			{
82			return EVENT_VERSION (EV_VERSION_MAJOR, EV_VERSION_MINOR);
83			}
84
85			const char *event_get_method (void)
86			{
87			return "libev";
88			}
89
90			void *event_init (void)
91			{
92	root	1.9	#if EV_MULTIPLICITY
93	root	1.10	if (x_cur)
94			x_cur = (struct event_base *)ev_loop_new (EVMETHOD_AUTO);
95			else
96	root	1.13	x_cur = (struct event_base *)ev_default_loop (EVMETHOD_AUTO);
97	root	1.9	#else
98	root	1.10	assert (("multiple event bases not supported when not compiled with EV_MULTIPLICITY", !x_cur));
99
100	root	1.17	x_cur = (struct event_base *)(long)ev_default_loop (EVMETHOD_AUTO);
101	root	1.9	#endif
102	root	1.1
103	root	1.9	return x_cur;
104	root	1.1	}
105
106			void event_base_free (struct event_base *base)
107			{
108	root	1.8	dLOOPbase;
109
110	root	1.9	#if EV_MULTIPLICITY
111	root	1.13	if (ev_default_loop (EVMETHOD_AUTO) != loop)
112			ev_loop_destroy (loop);
113	root	1.9	#endif
114	root	1.1	}
115
116			int event_dispatch (void)
117			{
118			return event_base_dispatch (x_cur);
119			}
120
121	root	1.12	#ifdef EV_STANDALONE
122	root	1.1	void event_set_log_callback (event_log_cb cb)
123			{
124			/* nop */
125			}
126	root	1.5	#endif
127	root	1.1
128			int event_loop (int flags)
129			{
130			return event_base_loop (x_cur, flags);
131			}
132
133			int event_loopexit (struct timeval *tv)
134			{
135	root	1.5	return event_base_loopexit (x_cur, tv);
136	root	1.1	}
137
138			static void
139			x_cb (struct event *ev, int revents)
140			{
141			revents &= EV_READ \| EV_WRITE \| EV_TIMEOUT \| EV_SIGNAL;
142
143			ev->ev_res = revents;
144			ev->ev_callback (ev->ev_fd, revents, ev->ev_arg);
145			}
146
147			static void
148	root	1.7	x_cb_sig (EV_P_ struct ev_signal *w, int revents)
149	root	1.1	{
150	root	1.20	struct event ev = (struct event )(((char *)w) - offsetof (struct event, iosig.sig));
151
152			if (revents & EV_ERROR)
153			event_del (ev);
154
155			x_cb (ev, revents);
156	root	1.1	}
157
158			static void
159	root	1.7	x_cb_io (EV_P_ struct ev_io *w, int revents)
160	root	1.1	{
161	root	1.7	struct event ev = (struct event )(((char *)w) - offsetof (struct event, iosig.io));
162
163	root	1.20	if (revents & EV_ERROR)
164			event_del (ev);
165			else if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w))
166	root	1.9	ev_io_stop (EV_A_ w);
167	root	1.7
168			x_cb (ev, revents);
169	root	1.1	}
170
171			static void
172	root	1.7	x_cb_to (EV_P_ struct ev_timer *w, int revents)
173	root	1.1	{
174	root	1.14	struct event ev = (struct event )(((char *)w) - offsetof (struct event, to));
175
176			event_del (ev);
177
178			x_cb (ev, revents);
179	root	1.1	}
180
181			void event_set (struct event ev, int fd, short events, void (cb)(int, short, void ), void arg)
182			{
183	root	1.14	if (events & EV_SIGNAL)
184	root	1.25	ev_init (&ev->iosig.sig, x_cb_sig);
185	root	1.14	else
186	root	1.25	ev_init (&ev->iosig.io, x_cb_io);
187	root	1.4
188	root	1.25	ev_init (&ev->to, x_cb_to);
189	root	1.1
190	root	1.9	ev->ev_base = x_cur; /* not threadsafe, but its like libevent works */
191	root	1.1	ev->ev_fd = fd;
192			ev->ev_events = events;
193			ev->ev_pri = 0;
194			ev->ev_callback = cb;
195			ev->ev_arg = arg;
196			ev->ev_res = 0;
197			}
198
199			int event_once (int fd, short events, void (cb)(int, short, void ), void arg, struct timeval tv)
200			{
201	root	1.5	return event_base_once (x_cur, fd, events, cb, arg, tv);
202	root	1.1	}
203
204			int event_add (struct event ev, struct timeval tv)
205			{
206	root	1.7	dLOOPev;
207
208	root	1.4	/* disable all watchers */
209			event_del (ev);
210
211			if (ev->ev_events & EV_SIGNAL)
212	root	1.1	{
213	root	1.4	ev_signal_set (&ev->iosig.sig, ev->ev_fd);
214	root	1.7	ev_signal_start (EV_A_ &ev->iosig.sig);
215	root	1.1	}
216	root	1.4	else if (ev->ev_events & (EV_READ \| EV_WRITE))
217	root	1.1	{
218	root	1.4	ev_io_set (&ev->iosig.io, ev->ev_fd, ev->ev_events & (EV_READ \| EV_WRITE));
219	root	1.7	ev_io_start (EV_A_ &ev->iosig.io);
220	root	1.1	}
221
222	root	1.4	if (tv)
223	root	1.1	{
224	root	1.4	ev_timer_set (&ev->to, tv_get (tv), 0.);
225	root	1.7	ev_timer_start (EV_A_ &ev->to);
226	root	1.1	}
227
228			return 0;
229			}
230
231			int event_del (struct event *ev)
232			{
233	root	1.7	dLOOPev;
234
235	root	1.4	if (ev->ev_events & EV_SIGNAL)
236			{
237			/* sig */
238			if (ev_is_active (&ev->iosig.sig))
239	root	1.7	ev_signal_stop (EV_A_ &ev->iosig.sig);
240	root	1.4	}
241	root	1.16	else if (ev->ev_events & (EV_READ \| EV_WRITE))
242	root	1.1	{
243	root	1.4	/* io */
244			if (ev_is_active (&ev->iosig.io))
245	root	1.7	ev_io_stop (EV_A_ &ev->iosig.io);
246	root	1.1	}
247
248			if (ev_is_active (&ev->to))
249	root	1.7	ev_timer_stop (EV_A_ &ev->to);
250	root	1.1
251			return 0;
252			}
253
254	root	1.21	void event_active (struct event *ev, int res, short ncalls)
255			{
256	root	1.23	dLOOPev;
257
258	root	1.21	if (res & EV_TIMEOUT)
259	root	1.23	ev_feed_event (EV_A_ &ev->to, res & EV_TIMEOUT);
260	root	1.21
261			if (res & EV_SIGNAL)
262	root	1.23	ev_feed_event (EV_A_ &ev->iosig.sig, res & EV_SIGNAL);
263	root	1.21
264			if (res & (EV_READ \| EV_WRITE))
265	root	1.23	ev_feed_event (EV_A_ &ev->iosig.io, res & (EV_READ \| EV_WRITE));
266	root	1.21	}
267
268	root	1.1	int event_pending (struct event ev, short events, struct timeval tv)
269			{
270	root	1.18	short revents = 0;
271	root	1.7	dLOOPev;
272
273	root	1.1
274	root	1.4	if (ev->ev_events & EV_SIGNAL)
275			{
276			/* sig */
277	root	1.14	if (ev_is_active (&ev->iosig.sig) \|\| ev_is_pending (&ev->iosig.sig))
278	root	1.4	revents \|= EV_SIGNAL;
279			}
280	root	1.16	else if (ev->ev_events & (EV_READ \| EV_WRITE))
281	root	1.4	{
282			/* io */
283	root	1.14	if (ev_is_active (&ev->iosig.io) \|\| ev_is_pending (&ev->iosig.io))
284	root	1.4	revents \|= ev->ev_events & (EV_READ \| EV_WRITE);
285			}
286	root	1.1
287	root	1.14	if (ev->ev_events & EV_TIMEOUT \|\| ev_is_active (&ev->to) \|\| ev_is_pending (&ev->to))
288	root	1.1	{
289			revents \|= EV_TIMEOUT;
290
291			if (tv)
292	root	1.7	tv_set (tv, ev_now (EV_A)); /* not sure if this is right :) */
293	root	1.1	}
294
295			return events & revents;
296			}
297
298			int event_priority_init (int npri)
299			{
300			return event_base_priority_init (x_cur, npri);
301			}
302
303			int event_priority_set (struct event *ev, int pri)
304			{
305			ev->ev_pri = pri;
306
307			return 0;
308			}
309
310			int event_base_set (struct event_base base, struct event ev)
311			{
312			ev->ev_base = base;
313
314			return 0;
315			}
316
317			int event_base_loop (struct event_base *base, int flags)
318			{
319	root	1.7	dLOOPbase;
320	root	1.8
321			ev_loop (EV_A_ flags);
322	root	1.1
323			return 0;
324			}
325
326			int event_base_dispatch (struct event_base *base)
327			{
328			return event_base_loop (base, 0);
329			}
330
331			static void
332	root	1.9	x_loopexit_cb (int revents, void *base)
333	root	1.1	{
334	root	1.9	dLOOPbase;
335
336			ev_unloop (EV_A_ EVUNLOOP_ONCE);
337	root	1.1	}
338
339			int event_base_loopexit (struct event_base base, struct timeval tv)
340			{
341	root	1.18	ev_tstamp after = tv_get (tv);
342	root	1.7	dLOOPbase;
343	root	1.1
344	root	1.7	ev_once (EV_A_ -1, 0, after >= 0. ? after : 0., x_loopexit_cb, (void *)base);
345	root	1.5
346			return -1;
347	root	1.1	}
348
349			struct x_once
350			{
351			int fd;
352			void (cb)(int, short, void );
353			void *arg;
354			};
355
356			static void
357			x_once_cb (int revents, void *arg)
358			{
359	root	1.19	struct x_once once = (struct x_once )arg;
360	root	1.1
361			once->cb (once->fd, revents, once->arg);
362			free (once);
363			}
364
365			int event_base_once (struct event_base base, int fd, short events, void (cb)(int, short, void ), void arg, struct timeval *tv)
366			{
367	root	1.19	struct x_once once = (struct x_once )malloc (sizeof (struct x_once));
368	root	1.7	dLOOPbase;
369	root	1.1
370			if (!once)
371			return -1;
372
373			once->fd = fd;
374			once->cb = cb;
375			once->arg = arg;
376
377	root	1.7	ev_once (EV_A_ fd, events & (EV_READ \| EV_WRITE), tv_get (tv), x_once_cb, (void *)once);
378	root	1.1
379			return 0;
380			}
381
382			int event_base_priority_init (struct event_base *base, int npri)
383			{
384	root	1.13	/dLOOPbase;/
385	root	1.7
386	root	1.1	return 0;
387			}
388