xref: /freebsd/contrib/unbound/util/ub_event_pluggable.c (revision d5b0e70f7e04d971691517ce1304d86a1e367e2e) 
1 /*
2  * util/ub_event_pluggable.c - call registered pluggable event functions
3  *
4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
5  *
6  * This software is open source.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  *
15  * Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  *
19  * Neither the name of the NLNET LABS nor the names of its contributors may
20  * be used to endorse or promote products derived from this software without
21  * specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34  */
35 
36 /**
37  * \file
38  *
39  * This file contains an implementation for the indirection layer for pluggable
40  * events that calls the registered pluggable event loop.  It also defines a
41  * default pluggable event loop based on the default libevent (compatibility)
42  * functions.
43  */
44 #include "config.h"
45 #include <sys/time.h>
46 #include "util/ub_event.h"
47 #include "libunbound/unbound-event.h"
48 #include "util/netevent.h"
49 #include "util/log.h"
50 #include "util/fptr_wlist.h"
51 
52 /* We define libevent structures here to hide the libevent stuff. */
53 
54 #ifdef USE_MINI_EVENT
55 #  ifdef USE_WINSOCK
56 #    include "util/winsock_event.h"
57 #  else
58 #    include "util/mini_event.h"
59 #  endif /* USE_WINSOCK */
60 #else /* USE_MINI_EVENT */
61    /* we use libevent */
62 #  ifdef HAVE_EVENT_H
63 #    include <event.h>
64 #  else
65 #    include "event2/event.h"
66 #    include "event2/event_struct.h"
67 #    include "event2/event_compat.h"
68 #  endif
69 #endif /* USE_MINI_EVENT */
70 
71 #if UB_EV_TIMEOUT != EV_TIMEOUT || UB_EV_READ != EV_READ || \
72     UB_EV_WRITE != EV_WRITE || UB_EV_SIGNAL != EV_SIGNAL || \
73     UB_EV_PERSIST != EV_PERSIST
74 /* Only necessary for libev */
75 #  define NATIVE_BITS(b) ( \
76 	  (((b) & UB_EV_TIMEOUT) ? EV_TIMEOUT : 0) \
77 	| (((b) & UB_EV_READ   ) ? EV_READ    : 0) \
78 	| (((b) & UB_EV_WRITE  ) ? EV_WRITE   : 0) \
79 	| (((b) & UB_EV_SIGNAL ) ? EV_SIGNAL  : 0) \
80 	| (((b) & UB_EV_PERSIST) ? EV_PERSIST : 0))
81 
82 #  define UB_EV_BITS(b) ( \
83 	  (((b) & EV_TIMEOUT) ? UB_EV_TIMEOUT : 0) \
84 	| (((b) & EV_READ   ) ? UB_EV_READ    : 0) \
85 	| (((b) & EV_WRITE  ) ? UB_EV_WRITE   : 0) \
86 	| (((b) & EV_SIGNAL ) ? UB_EV_SIGNAL  : 0) \
87 	| (((b) & EV_PERSIST) ? UB_EV_PERSIST : 0))
88 
89 #  define UB_EV_BITS_CB(C) void my_ ## C (int fd, short bits, void *arg) \
90 	{ (C)(fd, UB_EV_BITS(bits), arg); }
91 
92 UB_EV_BITS_CB(comm_point_udp_callback);
93 UB_EV_BITS_CB(comm_point_udp_ancil_callback)
94 UB_EV_BITS_CB(comm_point_tcp_accept_callback)
95 UB_EV_BITS_CB(comm_point_tcp_handle_callback)
96 UB_EV_BITS_CB(comm_timer_callback)
97 UB_EV_BITS_CB(comm_signal_callback)
98 UB_EV_BITS_CB(comm_point_local_handle_callback)
99 UB_EV_BITS_CB(comm_point_raw_handle_callback)
100 UB_EV_BITS_CB(tube_handle_signal)
101 UB_EV_BITS_CB(comm_base_handle_slow_accept)
102 
103 static void (*NATIVE_BITS_CB(void (*cb)(int, short, void*)))(int, short, void*)
104 {
105 	if(cb == comm_point_udp_callback)
106 		return my_comm_point_udp_callback;
107 	else if(cb == comm_point_udp_ancil_callback)
108 		return my_comm_point_udp_ancil_callback;
109 	else if(cb == comm_point_tcp_accept_callback)
110 		return my_comm_point_tcp_accept_callback;
111 	else if(cb == comm_point_tcp_handle_callback)
112 		return my_comm_point_tcp_handle_callback;
113 	else if(cb == comm_timer_callback)
114 		return my_comm_timer_callback;
115 	else if(cb == comm_signal_callback)
116 		return my_comm_signal_callback;
117 	else if(cb == comm_point_local_handle_callback)
118 		return my_comm_point_local_handle_callback;
119 	else if(cb == comm_point_raw_handle_callback)
120 		return my_comm_point_raw_handle_callback;
121 	else if(cb == tube_handle_signal)
122 		return my_tube_handle_signal;
123 	else if(cb == comm_base_handle_slow_accept)
124 		return my_comm_base_handle_slow_accept;
125 	else
126 		return NULL;
127 }
128 #else
129 #  define NATIVE_BITS(b) (b)
130 #  define NATIVE_BITS_CB(c) (c)
131 #endif
132 
133 #ifndef EVFLAG_AUTO
134 #define EVFLAG_AUTO 0
135 #endif
136 
137 struct my_event_base {
138 	struct ub_event_base super;
139 	struct event_base* base;
140 };
141 
142 struct my_event {
143 	struct ub_event super;
144 	struct event ev;
145 };
146 
147 #define AS_MY_EVENT_BASE(x) ((struct my_event_base*)x)
148 #define AS_MY_EVENT(x) ((struct my_event*)x)
149 
150 const char* ub_event_get_version(void)
151 {
152 	return "pluggable-event"PACKAGE_VERSION;
153 }
154 
155 static void
156 my_event_add_bits(struct ub_event* ev, short bits)
157 {
158 	AS_MY_EVENT(ev)->ev.ev_events |= NATIVE_BITS(bits);
159 }
160 
161 static void
162 my_event_del_bits(struct ub_event* ev, short bits)
163 {
164 	AS_MY_EVENT(ev)->ev.ev_events &= ~NATIVE_BITS(bits);
165 }
166 
167 static void
168 my_event_set_fd(struct ub_event* ev, int fd)
169 {
170 	AS_MY_EVENT(ev)->ev.ev_fd = fd;
171 }
172 
173 static void
174 my_event_free(struct ub_event* ev)
175 {
176 	free(AS_MY_EVENT(ev));
177 }
178 
179 static int
180 my_event_add(struct ub_event* ev, struct timeval* tv)
181 {
182 	return event_add(&AS_MY_EVENT(ev)->ev, tv);
183 }
184 
185 static int
186 my_event_del(struct ub_event* ev)
187 {
188 	return event_del(&AS_MY_EVENT(ev)->ev);
189 }
190 
191 static int
192 my_timer_add(struct ub_event* ev, struct ub_event_base* base,
193 	void (*cb)(int, short, void*), void* arg, struct timeval* tv)
194 {
195 	event_set(&AS_MY_EVENT(ev)->ev, -1, EV_TIMEOUT,NATIVE_BITS_CB(cb),arg);
196 	if (event_base_set(AS_MY_EVENT_BASE(base)->base, &AS_MY_EVENT(ev)->ev)
197 		!= 0)
198 		return -1;
199 	return evtimer_add(&AS_MY_EVENT(ev)->ev, tv);
200 }
201 
202 static int
203 my_timer_del(struct ub_event* ev)
204 {
205 	return evtimer_del(&AS_MY_EVENT(ev)->ev);
206 }
207 
208 static int
209 my_signal_add(struct ub_event* ev, struct timeval* tv)
210 {
211 	return signal_add(&AS_MY_EVENT(ev)->ev, tv);
212 }
213 
214 static int
215 my_signal_del(struct ub_event* ev)
216 {
217 	return signal_del(&AS_MY_EVENT(ev)->ev);
218 }
219 
220 static void
221 my_winsock_unregister_wsaevent(struct ub_event* ev)
222 {
223 #if defined(USE_MINI_EVENT) && defined(USE_WINSOCK)
224 	winsock_unregister_wsaevent(&AS_MY_EVENT(ev)->ev);
225 	free(AS_MY_EVENT(ev));
226 #else
227 	(void)ev;
228 #endif
229 }
230 
231 static void
232 my_winsock_tcp_wouldblock(struct ub_event* ev, int eventbits)
233 {
234 #if defined(USE_MINI_EVENT) && defined(USE_WINSOCK)
235 	winsock_tcp_wouldblock(&AS_MY_EVENT(ev)->ev, NATIVE_BITS(eventbits));
236 #else
237 	(void)ev;
238 	(void)eventbits;
239 #endif
240 }
241 
242 static struct ub_event_vmt default_event_vmt = {
243 	my_event_add_bits, my_event_del_bits, my_event_set_fd,
244 	my_event_free, my_event_add, my_event_del,
245 	my_timer_add, my_timer_del, my_signal_add, my_signal_del,
246 	my_winsock_unregister_wsaevent, my_winsock_tcp_wouldblock
247 };
248 
249 static void
250 my_event_base_free(struct ub_event_base* base)
251 {
252 #ifdef USE_MINI_EVENT
253 	event_base_free(AS_MY_EVENT_BASE(base)->base);
254 #elif defined(HAVE_EVENT_BASE_FREE) && defined(HAVE_EVENT_BASE_ONCE)
255 	/* only libevent 1.2+ has it, but in 1.2 it is broken -
256 	   assertion fails on signal handling ev that is not deleted
257  	   in libevent 1.3c (event_base_once appears) this is fixed. */
258 	event_base_free(AS_MY_EVENT_BASE(base)->base);
259 #endif /* HAVE_EVENT_BASE_FREE and HAVE_EVENT_BASE_ONCE */
260 	free(AS_MY_EVENT_BASE(base));
261 }
262 
263 static int
264 my_event_base_dispatch(struct ub_event_base* base)
265 {
266 	return event_base_dispatch(AS_MY_EVENT_BASE(base)->base);
267 }
268 
269 static int
270 my_event_base_loopexit(struct ub_event_base* base, struct timeval* tv)
271 {
272 	return event_base_loopexit(AS_MY_EVENT_BASE(base)->base, tv);
273 }
274 
275 static struct ub_event*
276 my_event_new(struct ub_event_base* base, int fd, short bits,
277 	void (*cb)(int, short, void*), void* arg)
278 {
279 	struct my_event *my_ev = (struct my_event*)calloc(1,
280 		sizeof(struct my_event));
281 
282 	if (!my_ev)
283 		return NULL;
284 
285 	event_set(&my_ev->ev, fd, NATIVE_BITS(bits), NATIVE_BITS_CB(cb), arg);
286 	if (event_base_set(AS_MY_EVENT_BASE(base)->base, &my_ev->ev) != 0) {
287 		free(my_ev);
288 		return NULL;
289 	}
290 	my_ev->super.magic = UB_EVENT_MAGIC;
291 	my_ev->super.vmt = &default_event_vmt;
292 	return &my_ev->super;
293 }
294 
295 static struct ub_event*
296 my_signal_new(struct ub_event_base* base, int fd,
297 	void (*cb)(int, short, void*), void* arg)
298 {
299 	struct my_event *my_ev = (struct my_event*)calloc(1,
300 		sizeof(struct my_event));
301 
302 	if (!my_ev)
303 		return NULL;
304 
305 	signal_set(&my_ev->ev, fd, NATIVE_BITS_CB(cb), arg);
306 	if (event_base_set(AS_MY_EVENT_BASE(base)->base, &my_ev->ev) != 0) {
307 		free(my_ev);
308 		return NULL;
309 	}
310 	my_ev->super.magic = UB_EVENT_MAGIC;
311 	my_ev->super.vmt = &default_event_vmt;
312 	return &my_ev->super;
313 }
314 
315 static struct ub_event*
316 my_winsock_register_wsaevent(struct ub_event_base* base, void* wsaevent,
317 	void (*cb)(int, short, void*), void* arg)
318 {
319 #if defined(USE_MINI_EVENT) && defined(USE_WINSOCK)
320 	struct my_event *my_ev = (struct my_event*)calloc(1,
321 		sizeof(struct my_event));
322 
323 	if (!my_ev)
324 		return NULL;
325 
326 	if (!winsock_register_wsaevent(AS_MY_EVENT_BASE(base)->base,
327 		&my_ev->ev, wsaevent, cb, arg)) {
328 		free(my_ev);
329 		return NULL;
330 
331 	}
332 	my_ev->super.magic = UB_EVENT_MAGIC;
333 	my_ev->super.vmt = &default_event_vmt;
334 	return &my_ev->super;
335 #else
336 	(void)base;
337 	(void)wsaevent;
338 	(void)cb;
339 	(void)arg;
340 	return NULL;
341 #endif
342 }
343 
344 static struct ub_event_base_vmt default_event_base_vmt = {
345 	my_event_base_free, my_event_base_dispatch,
346 	my_event_base_loopexit, my_event_new, my_signal_new,
347 	my_winsock_register_wsaevent
348 };
349 
350 struct ub_event_base*
351 ub_default_event_base(int sigs, time_t* time_secs, struct timeval* time_tv)
352 {
353 	struct my_event_base* my_base = (struct my_event_base*)calloc(1,
354 		sizeof(struct my_event_base));
355 
356 	if (!my_base)
357 		return NULL;
358 
359 #ifdef USE_MINI_EVENT
360 	(void)sigs;
361 	/* use mini event time-sharing feature */
362 	my_base->base = event_init(time_secs, time_tv);
363 #else
364 	(void)time_secs;
365 	(void)time_tv;
366 #  if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
367 	/* libev */
368 	if(sigs)
369 		my_base->base = (struct event_base*)ev_default_loop(EVFLAG_AUTO);
370 	else
371 		my_base->base = (struct event_base*)ev_loop_new(EVFLAG_AUTO);
372 #  else
373 	(void)sigs;
374 #    ifdef HAVE_EVENT_BASE_NEW
375 	my_base->base = event_base_new();
376 #    else
377 	my_base->base = event_init();
378 #    endif
379 #  endif
380 #endif
381 	if (!my_base->base) {
382 		free(my_base);
383 		return NULL;
384 	}
385 	my_base->super.magic = UB_EVENT_MAGIC;
386 	my_base->super.vmt = &default_event_base_vmt;
387 	return &my_base->super;
388 }
389 
390 struct ub_event_base*
391 ub_libevent_event_base(struct event_base* base)
392 {
393 #ifdef USE_MINI_EVENT
394 	(void)base;
395 	return NULL;
396 #else
397 	struct my_event_base* my_base = (struct my_event_base*)calloc(1,
398 		sizeof(struct my_event_base));
399 
400 	if (!my_base)
401 		return NULL;
402 	my_base->super.magic = UB_EVENT_MAGIC;
403 	my_base->super.vmt = &default_event_base_vmt;
404 	my_base->base = base;
405 	return &my_base->super;
406 #endif
407 }
408 
409 struct event_base*
410 ub_libevent_get_event_base(struct ub_event_base* base)
411 {
412 #ifndef USE_MINI_EVENT
413 	if (base->vmt == &default_event_base_vmt)
414 		return AS_MY_EVENT_BASE(base)->base;
415 #else
416 	(void)base;
417 #endif
418 	return NULL;
419 }
420 
421 #if (defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)) && defined(EVBACKEND_SELECT)
422 static const char* ub_ev_backend2str_pluggable(int b)
423 {
424 	switch(b) {
425 	case EVBACKEND_SELECT:	return "select";
426 	case EVBACKEND_POLL:	return "poll";
427 	case EVBACKEND_EPOLL:	return "epoll";
428 	case EVBACKEND_KQUEUE:	return "kqueue";
429 	case EVBACKEND_DEVPOLL: return "devpoll";
430 	case EVBACKEND_PORT:	return "evport";
431 	}
432 	return "unknown";
433 }
434 #endif
435 
436 void
437 ub_get_event_sys(struct ub_event_base* ub_base, const char** n, const char** s,
438 	const char** m)
439 {
440 #ifdef USE_WINSOCK
441 	(void)ub_base;
442 	*n = "pluggable-event";
443 	*s = "winsock";
444 	*m = "WSAWaitForMultipleEvents";
445 #elif defined(USE_MINI_EVENT)
446 	(void)ub_base;
447 	*n = "pluggable-event";
448 	*s = "internal";
449 	*m = "select";
450 #else
451 	struct event_base* b = ub_libevent_get_event_base(ub_base);
452 	/* This function is only called from comm_base_create, so
453 	 * ub_base is guaranteed to exist and to be the default
454 	 * event base.
455 	 */
456 	assert(b != NULL);
457 	*n = "pluggable-event";
458 	*s = event_get_version();
459 #  if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
460 	*n = "pluggable-libev";
461 #    ifdef EVBACKEND_SELECT
462 	*m = ub_ev_backend2str_pluggable(ev_backend((struct ev_loop*)b));
463 #    else
464 	*m = "not obtainable";
465 #    endif
466 #  elif defined(HAVE_EVENT_BASE_GET_METHOD)
467 	*n = "pluggable-libevent";
468 	*m = event_base_get_method(b);
469 #  else
470 	*m = "not obtainable";
471 #  endif
472 #endif
473 }
474 
475 void
476 ub_event_base_free(struct ub_event_base* base)
477 {
478 	if (base && base->magic == UB_EVENT_MAGIC) {
479 		fptr_ok(base->vmt != &default_event_base_vmt ||
480 			base->vmt->free == my_event_base_free);
481 		(*base->vmt->free)(base);
482 	}
483 }
484 
485 int
486 ub_event_base_dispatch(struct ub_event_base* base)
487 {
488 	if (base->magic == UB_EVENT_MAGIC) {
489 		fptr_ok(base->vmt != &default_event_base_vmt ||
490 			base->vmt->dispatch == my_event_base_dispatch);
491 		return (*base->vmt->dispatch)(base);
492 	}
493 	return -1;
494 }
495 
496 int
497 ub_event_base_loopexit(struct ub_event_base* base)
498 {
499 	if (base->magic == UB_EVENT_MAGIC) {
500 		fptr_ok(base->vmt != &default_event_base_vmt ||
501 			base->vmt->loopexit == my_event_base_loopexit);
502 		return (*base->vmt->loopexit)(base, NULL);
503 	}
504 	return -1;
505 }
506 
507 struct ub_event*
508 ub_event_new(struct ub_event_base* base, int fd, short bits,
509 	void (*cb)(int, short, void*), void* arg)
510 {
511 	if (base->magic == UB_EVENT_MAGIC) {
512 		fptr_ok(base->vmt != &default_event_base_vmt ||
513 			base->vmt->new_event == my_event_new);
514 		return (*base->vmt->new_event)(base, fd, bits, cb, arg);
515 	}
516 	return NULL;
517 }
518 
519 struct ub_event*
520 ub_signal_new(struct ub_event_base* base, int fd,
521 	void (*cb)(int, short, void*), void* arg)
522 {
523 	if (base->magic == UB_EVENT_MAGIC) {
524 		fptr_ok(base->vmt != &default_event_base_vmt ||
525 			base->vmt->new_signal == my_signal_new);
526 		return (*base->vmt->new_signal)(base, fd, cb, arg);
527 	}
528 	return NULL;
529 }
530 
531 struct ub_event*
532 ub_winsock_register_wsaevent(struct ub_event_base* base, void* wsaevent,
533 	void (*cb)(int, short, void*), void* arg)
534 {
535 	if (base->magic == UB_EVENT_MAGIC) {
536 		fptr_ok(base->vmt != &default_event_base_vmt ||
537 			base->vmt->winsock_register_wsaevent ==
538 			my_winsock_register_wsaevent);
539 		return (*base->vmt->winsock_register_wsaevent)(base, wsaevent, cb, arg);
540 	}
541 	return NULL;
542 }
543 
544 void
545 ub_event_add_bits(struct ub_event* ev, short bits)
546 {
547 	if (ev->magic == UB_EVENT_MAGIC) {
548 		fptr_ok(ev->vmt != &default_event_vmt ||
549 			ev->vmt->add_bits == my_event_add_bits);
550 		(*ev->vmt->add_bits)(ev, bits);
551 	}
552 }
553 
554 void
555 ub_event_del_bits(struct ub_event* ev, short bits)
556 {
557 	if (ev->magic == UB_EVENT_MAGIC) {
558 		fptr_ok(ev->vmt != &default_event_vmt ||
559 			ev->vmt->del_bits == my_event_del_bits);
560 		(*ev->vmt->del_bits)(ev, bits);
561 	}
562 }
563 
564 void
565 ub_event_set_fd(struct ub_event* ev, int fd)
566 {
567 	if (ev->magic == UB_EVENT_MAGIC) {
568 		fptr_ok(ev->vmt != &default_event_vmt ||
569 			ev->vmt->set_fd == my_event_set_fd);
570 		(*ev->vmt->set_fd)(ev, fd);
571 	}
572 }
573 
574 void
575 ub_event_free(struct ub_event* ev)
576 {
577 	if (ev && ev->magic == UB_EVENT_MAGIC) {
578 		fptr_ok(ev->vmt != &default_event_vmt ||
579 			ev->vmt->free == my_event_free);
580 		(*ev->vmt->free)(ev);
581 	}
582 }
583 
584 int
585 ub_event_add(struct ub_event* ev, struct timeval* tv)
586 {
587 	if (ev->magic == UB_EVENT_MAGIC) {
588 		fptr_ok(ev->vmt != &default_event_vmt ||
589 			ev->vmt->add == my_event_add);
590 		return (*ev->vmt->add)(ev, tv);
591 	}
592        return -1;
593 }
594 
595 int
596 ub_event_del(struct ub_event* ev)
597 {
598 	if (ev && ev->magic == UB_EVENT_MAGIC) {
599 		fptr_ok(ev->vmt != &default_event_vmt ||
600 			ev->vmt->del == my_event_del);
601 		return (*ev->vmt->del)(ev);
602 	}
603 	return -1;
604 }
605 
606 int
607 ub_timer_add(struct ub_event* ev, struct ub_event_base* base,
608 	void (*cb)(int, short, void*), void* arg, struct timeval* tv)
609 {
610 	if (ev->magic == UB_EVENT_MAGIC) {
611 		fptr_ok(ev->vmt != &default_event_vmt ||
612 			ev->vmt->add_timer == my_timer_add);
613 		return (*ev->vmt->add_timer)(ev, base, cb, arg, tv);
614 	}
615 	return -1;
616 }
617 
618 int
619 ub_timer_del(struct ub_event* ev)
620 {
621 	if (ev && ev->magic == UB_EVENT_MAGIC) {
622 		fptr_ok(ev->vmt != &default_event_vmt ||
623 			ev->vmt->del_timer == my_timer_del);
624 		return (*ev->vmt->del_timer)(ev);
625 	}
626 	return -1;
627 }
628 
629 int
630 ub_signal_add(struct ub_event* ev, struct timeval* tv)
631 {
632 	if (ev->magic == UB_EVENT_MAGIC) {
633 		fptr_ok(ev->vmt != &default_event_vmt ||
634 			ev->vmt->add_signal == my_signal_add);
635 		return (*ev->vmt->add_signal)(ev, tv);
636 	}
637 	return -1;
638 }
639 
640 int
641 ub_signal_del(struct ub_event* ev)
642 {
643 	if (ev && ev->magic == UB_EVENT_MAGIC) {
644 		fptr_ok(ev->vmt != &default_event_vmt ||
645 			ev->vmt->del_signal == my_signal_del);
646 		return (*ev->vmt->del_signal)(ev);
647 	}
648 	return -1;
649 }
650 
651 void
652 ub_winsock_unregister_wsaevent(struct ub_event* ev)
653 {
654 	if (ev && ev->magic == UB_EVENT_MAGIC) {
655 		fptr_ok(ev->vmt != &default_event_vmt ||
656 			ev->vmt->winsock_unregister_wsaevent ==
657 			my_winsock_unregister_wsaevent);
658 		(*ev->vmt->winsock_unregister_wsaevent)(ev);
659 	}
660 }
661 
662 void
663 ub_winsock_tcp_wouldblock(struct ub_event* ev, int eventbits)
664 {
665 	if (ev->magic == UB_EVENT_MAGIC) {
666 		fptr_ok(ev->vmt != &default_event_vmt ||
667 			ev->vmt->winsock_tcp_wouldblock ==
668 			my_winsock_tcp_wouldblock);
669 		if (ev->vmt->winsock_tcp_wouldblock)
670 			(*ev->vmt->winsock_tcp_wouldblock)(ev, eventbits);
671 	}
672 }
673 
674 void ub_comm_base_now(struct comm_base* cb)
675 {
676 	time_t *tt;
677 	struct timeval *tv;
678 
679 #ifdef USE_MINI_EVENT
680 /** minievent updates the time when it blocks. */
681 	if (comm_base_internal(cb)->magic == UB_EVENT_MAGIC &&
682 	    comm_base_internal(cb)->vmt == &default_event_base_vmt)
683 		return; /* Actually using mini event, so do not set time */
684 #endif /* USE_MINI_EVENT */
685 
686 /** fillup the time values in the event base */
687 	comm_base_timept(cb, &tt, &tv);
688 	if(gettimeofday(tv, NULL) < 0) {
689 		log_err("gettimeofday: %s", strerror(errno));
690 	}
691 #ifndef S_SPLINT_S
692 	*tt = tv->tv_sec;
693 #endif
694 }
695 
696