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planemo upload commit 2e9511a184a1ca667c7be0c6321a36dc4e3d116d
author jpayne
date Tue, 18 Mar 2025 17:55:14 -0400
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1 /*
2 * libev simple C++ wrapper classes
3 *
4 * Copyright (c) 2007,2008,2010,2018,2020 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 #ifndef EVPP_H__
41 #define EVPP_H__
42
43 #ifdef EV_H
44 # include EV_H
45 #else
46 # include "ev.h"
47 #endif
48
49 #ifndef EV_USE_STDEXCEPT
50 # define EV_USE_STDEXCEPT 1
51 #endif
52
53 #if EV_USE_STDEXCEPT
54 # include <stdexcept>
55 #endif
56
57 namespace ev {
58
59 typedef ev_tstamp tstamp;
60
61 enum {
62 UNDEF = EV_UNDEF,
63 NONE = EV_NONE,
64 READ = EV_READ,
65 WRITE = EV_WRITE,
66 #if EV_COMPAT3
67 TIMEOUT = EV_TIMEOUT,
68 #endif
69 TIMER = EV_TIMER,
70 PERIODIC = EV_PERIODIC,
71 SIGNAL = EV_SIGNAL,
72 CHILD = EV_CHILD,
73 STAT = EV_STAT,
74 IDLE = EV_IDLE,
75 CHECK = EV_CHECK,
76 PREPARE = EV_PREPARE,
77 FORK = EV_FORK,
78 ASYNC = EV_ASYNC,
79 EMBED = EV_EMBED,
80 # undef ERROR // some systems stupidly #define ERROR
81 ERROR = EV_ERROR
82 };
83
84 enum
85 {
86 AUTO = EVFLAG_AUTO,
87 NOENV = EVFLAG_NOENV,
88 FORKCHECK = EVFLAG_FORKCHECK,
89
90 SELECT = EVBACKEND_SELECT,
91 POLL = EVBACKEND_POLL,
92 EPOLL = EVBACKEND_EPOLL,
93 KQUEUE = EVBACKEND_KQUEUE,
94 DEVPOLL = EVBACKEND_DEVPOLL,
95 PORT = EVBACKEND_PORT
96 };
97
98 enum
99 {
100 #if EV_COMPAT3
101 NONBLOCK = EVLOOP_NONBLOCK,
102 ONESHOT = EVLOOP_ONESHOT,
103 #endif
104 NOWAIT = EVRUN_NOWAIT,
105 ONCE = EVRUN_ONCE
106 };
107
108 enum how_t
109 {
110 ONE = EVBREAK_ONE,
111 ALL = EVBREAK_ALL
112 };
113
114 struct bad_loop
115 #if EV_USE_STDEXCEPT
116 : std::exception
117 #endif
118 {
119 #if EV_USE_STDEXCEPT
120 const char *what () const EV_NOEXCEPT
121 {
122 return "libev event loop cannot be initialized, bad value of LIBEV_FLAGS?";
123 }
124 #endif
125 };
126
127 #ifdef EV_AX
128 # undef EV_AX
129 #endif
130
131 #ifdef EV_AX_
132 # undef EV_AX_
133 #endif
134
135 #if EV_MULTIPLICITY
136 # define EV_AX raw_loop
137 # define EV_AX_ raw_loop,
138 #else
139 # define EV_AX
140 # define EV_AX_
141 #endif
142
143 struct loop_ref
144 {
145 loop_ref (EV_P) EV_NOEXCEPT
146 #if EV_MULTIPLICITY
147 : EV_AX (EV_A)
148 #endif
149 {
150 }
151
152 bool operator == (const loop_ref &other) const EV_NOEXCEPT
153 {
154 #if EV_MULTIPLICITY
155 return EV_AX == other.EV_AX;
156 #else
157 return true;
158 #endif
159 }
160
161 bool operator != (const loop_ref &other) const EV_NOEXCEPT
162 {
163 #if EV_MULTIPLICITY
164 return ! (*this == other);
165 #else
166 return false;
167 #endif
168 }
169
170 #if EV_MULTIPLICITY
171 bool operator == (const EV_P) const EV_NOEXCEPT
172 {
173 return this->EV_AX == EV_A;
174 }
175
176 bool operator != (const EV_P) const EV_NOEXCEPT
177 {
178 return ! (*this == EV_A);
179 }
180
181 operator struct ev_loop * () const EV_NOEXCEPT
182 {
183 return EV_AX;
184 }
185
186 operator const struct ev_loop * () const EV_NOEXCEPT
187 {
188 return EV_AX;
189 }
190
191 bool is_default () const EV_NOEXCEPT
192 {
193 return EV_AX == ev_default_loop (0);
194 }
195 #endif
196
197 #if EV_COMPAT3
198 void loop (int flags = 0)
199 {
200 ev_run (EV_AX_ flags);
201 }
202
203 void unloop (how_t how = ONE) EV_NOEXCEPT
204 {
205 ev_break (EV_AX_ how);
206 }
207 #endif
208
209 void run (int flags = 0)
210 {
211 ev_run (EV_AX_ flags);
212 }
213
214 void break_loop (how_t how = ONE) EV_NOEXCEPT
215 {
216 ev_break (EV_AX_ how);
217 }
218
219 void post_fork () EV_NOEXCEPT
220 {
221 ev_loop_fork (EV_AX);
222 }
223
224 unsigned int backend () const EV_NOEXCEPT
225 {
226 return ev_backend (EV_AX);
227 }
228
229 tstamp now () const EV_NOEXCEPT
230 {
231 return ev_now (EV_AX);
232 }
233
234 void ref () EV_NOEXCEPT
235 {
236 ev_ref (EV_AX);
237 }
238
239 void unref () EV_NOEXCEPT
240 {
241 ev_unref (EV_AX);
242 }
243
244 #if EV_FEATURE_API
245 unsigned int iteration () const EV_NOEXCEPT
246 {
247 return ev_iteration (EV_AX);
248 }
249
250 unsigned int depth () const EV_NOEXCEPT
251 {
252 return ev_depth (EV_AX);
253 }
254
255 void set_io_collect_interval (tstamp interval) EV_NOEXCEPT
256 {
257 ev_set_io_collect_interval (EV_AX_ interval);
258 }
259
260 void set_timeout_collect_interval (tstamp interval) EV_NOEXCEPT
261 {
262 ev_set_timeout_collect_interval (EV_AX_ interval);
263 }
264 #endif
265
266 // function callback
267 void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void *arg = 0) EV_NOEXCEPT
268 {
269 ev_once (EV_AX_ fd, events, timeout, cb, arg);
270 }
271
272 // method callback
273 template<class K, void (K::*method)(int)>
274 void once (int fd, int events, tstamp timeout, K *object) EV_NOEXCEPT
275 {
276 once (fd, events, timeout, method_thunk<K, method>, object);
277 }
278
279 // default method == operator ()
280 template<class K>
281 void once (int fd, int events, tstamp timeout, K *object) EV_NOEXCEPT
282 {
283 once (fd, events, timeout, method_thunk<K, &K::operator ()>, object);
284 }
285
286 template<class K, void (K::*method)(int)>
287 static void method_thunk (int revents, void *arg)
288 {
289 (static_cast<K *>(arg)->*method)
290 (revents);
291 }
292
293 // no-argument method callback
294 template<class K, void (K::*method)()>
295 void once (int fd, int events, tstamp timeout, K *object) EV_NOEXCEPT
296 {
297 once (fd, events, timeout, method_noargs_thunk<K, method>, object);
298 }
299
300 template<class K, void (K::*method)()>
301 static void method_noargs_thunk (int revents, void *arg)
302 {
303 (static_cast<K *>(arg)->*method)
304 ();
305 }
306
307 // simpler function callback
308 template<void (*cb)(int)>
309 void once (int fd, int events, tstamp timeout) EV_NOEXCEPT
310 {
311 once (fd, events, timeout, simpler_func_thunk<cb>);
312 }
313
314 template<void (*cb)(int)>
315 static void simpler_func_thunk (int revents, void *arg)
316 {
317 (*cb)
318 (revents);
319 }
320
321 // simplest function callback
322 template<void (*cb)()>
323 void once (int fd, int events, tstamp timeout) EV_NOEXCEPT
324 {
325 once (fd, events, timeout, simplest_func_thunk<cb>);
326 }
327
328 template<void (*cb)()>
329 static void simplest_func_thunk (int revents, void *arg)
330 {
331 (*cb)
332 ();
333 }
334
335 void feed_fd_event (int fd, int revents) EV_NOEXCEPT
336 {
337 ev_feed_fd_event (EV_AX_ fd, revents);
338 }
339
340 void feed_signal_event (int signum) EV_NOEXCEPT
341 {
342 ev_feed_signal_event (EV_AX_ signum);
343 }
344
345 #if EV_MULTIPLICITY
346 struct ev_loop* EV_AX;
347 #endif
348
349 };
350
351 #if EV_MULTIPLICITY
352 struct dynamic_loop : loop_ref
353 {
354
355 dynamic_loop (unsigned int flags = AUTO)
356 : loop_ref (ev_loop_new (flags))
357 {
358 if (!EV_AX)
359 throw bad_loop ();
360 }
361
362 ~dynamic_loop () EV_NOEXCEPT
363 {
364 ev_loop_destroy (EV_AX);
365 EV_AX = 0;
366 }
367
368 private:
369
370 dynamic_loop (const dynamic_loop &);
371
372 dynamic_loop & operator= (const dynamic_loop &);
373
374 };
375 #endif
376
377 struct default_loop : loop_ref
378 {
379 default_loop (unsigned int flags = AUTO)
380 #if EV_MULTIPLICITY
381 : loop_ref (ev_default_loop (flags))
382 #endif
383 {
384 if (
385 #if EV_MULTIPLICITY
386 !EV_AX
387 #else
388 !ev_default_loop (flags)
389 #endif
390 )
391 throw bad_loop ();
392 }
393
394 private:
395 default_loop (const default_loop &);
396 default_loop &operator = (const default_loop &);
397 };
398
399 inline loop_ref get_default_loop () EV_NOEXCEPT
400 {
401 #if EV_MULTIPLICITY
402 return ev_default_loop (0);
403 #else
404 return loop_ref ();
405 #endif
406 }
407
408 #undef EV_AX
409 #undef EV_AX_
410
411 #undef EV_PX
412 #undef EV_PX_
413 #if EV_MULTIPLICITY
414 # define EV_PX loop_ref EV_A
415 # define EV_PX_ loop_ref EV_A_
416 #else
417 # define EV_PX
418 # define EV_PX_
419 #endif
420
421 template<class ev_watcher, class watcher>
422 struct base : ev_watcher
423 {
424 // scoped pause/unpause of a watcher
425 struct freeze_guard
426 {
427 watcher &w;
428 bool active;
429
430 freeze_guard (watcher *self) EV_NOEXCEPT
431 : w (*self), active (w.is_active ())
432 {
433 if (active) w.stop ();
434 }
435
436 ~freeze_guard ()
437 {
438 if (active) w.start ();
439 }
440 };
441
442 #if EV_MULTIPLICITY
443 EV_PX;
444
445 // loop set
446 void set (EV_P) EV_NOEXCEPT
447 {
448 this->EV_A = EV_A;
449 }
450 #endif
451
452 base (EV_PX) EV_NOEXCEPT
453 #if EV_MULTIPLICITY
454 : EV_A (EV_A)
455 #endif
456 {
457 ev_init (this, 0);
458 }
459
460 void set_ (const void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) EV_NOEXCEPT
461 {
462 this->data = (void *)data;
463 ev_set_cb (static_cast<ev_watcher *>(this), cb);
464 }
465
466 // function callback
467 template<void (*function)(watcher &w, int)>
468 void set (void *data = 0) EV_NOEXCEPT
469 {
470 set_ (data, function_thunk<function>);
471 }
472
473 template<void (*function)(watcher &w, int)>
474 static void function_thunk (EV_P_ ev_watcher *w, int revents)
475 {
476 function
477 (*static_cast<watcher *>(w), revents);
478 }
479
480 // method callback
481 template<class K, void (K::*method)(watcher &w, int)>
482 void set (K *object) EV_NOEXCEPT
483 {
484 set_ (object, method_thunk<K, method>);
485 }
486
487 // default method == operator ()
488 template<class K>
489 void set (K *object) EV_NOEXCEPT
490 {
491 set_ (object, method_thunk<K, &K::operator ()>);
492 }
493
494 template<class K, void (K::*method)(watcher &w, int)>
495 static void method_thunk (EV_P_ ev_watcher *w, int revents)
496 {
497 (static_cast<K *>(w->data)->*method)
498 (*static_cast<watcher *>(w), revents);
499 }
500
501 // no-argument callback
502 template<class K, void (K::*method)()>
503 void set (K *object) EV_NOEXCEPT
504 {
505 set_ (object, method_noargs_thunk<K, method>);
506 }
507
508 template<class K, void (K::*method)()>
509 static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
510 {
511 (static_cast<K *>(w->data)->*method)
512 ();
513 }
514
515 void operator ()(int events = EV_UNDEF)
516 {
517 return
518 ev_cb (static_cast<ev_watcher *>(this))
519 (static_cast<ev_watcher *>(this), events);
520 }
521
522 bool is_active () const EV_NOEXCEPT
523 {
524 return ev_is_active (static_cast<const ev_watcher *>(this));
525 }
526
527 bool is_pending () const EV_NOEXCEPT
528 {
529 return ev_is_pending (static_cast<const ev_watcher *>(this));
530 }
531
532 void feed_event (int revents) EV_NOEXCEPT
533 {
534 ev_feed_event (EV_A_ static_cast<ev_watcher *>(this), revents);
535 }
536 };
537
538 inline tstamp now (EV_P) EV_NOEXCEPT
539 {
540 return ev_now (EV_A);
541 }
542
543 inline void delay (tstamp interval) EV_NOEXCEPT
544 {
545 ev_sleep (interval);
546 }
547
548 inline int version_major () EV_NOEXCEPT
549 {
550 return ev_version_major ();
551 }
552
553 inline int version_minor () EV_NOEXCEPT
554 {
555 return ev_version_minor ();
556 }
557
558 inline unsigned int supported_backends () EV_NOEXCEPT
559 {
560 return ev_supported_backends ();
561 }
562
563 inline unsigned int recommended_backends () EV_NOEXCEPT
564 {
565 return ev_recommended_backends ();
566 }
567
568 inline unsigned int embeddable_backends () EV_NOEXCEPT
569 {
570 return ev_embeddable_backends ();
571 }
572
573 inline void set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
574 {
575 ev_set_allocator (cb);
576 }
577
578 inline void set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
579 {
580 ev_set_syserr_cb (cb);
581 }
582
583 #if EV_MULTIPLICITY
584 #define EV_CONSTRUCT(cppstem,cstem) \
585 (EV_PX = get_default_loop ()) EV_NOEXCEPT \
586 : base<ev_ ## cstem, cppstem> (EV_A) \
587 { \
588 }
589 #else
590 #define EV_CONSTRUCT(cppstem,cstem) \
591 () EV_NOEXCEPT \
592 { \
593 }
594 #endif
595
596 /* using a template here would require quite a few more lines,
597 * so a macro solution was chosen */
598 #define EV_BEGIN_WATCHER(cppstem,cstem) \
599 \
600 struct cppstem : base<ev_ ## cstem, cppstem> \
601 { \
602 void start () EV_NOEXCEPT \
603 { \
604 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
605 } \
606 \
607 void stop () EV_NOEXCEPT \
608 { \
609 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
610 } \
611 \
612 cppstem EV_CONSTRUCT(cppstem,cstem) \
613 \
614 ~cppstem () EV_NOEXCEPT \
615 { \
616 stop (); \
617 } \
618 \
619 using base<ev_ ## cstem, cppstem>::set; \
620 \
621 private: \
622 \
623 cppstem (const cppstem &o); \
624 \
625 cppstem &operator =(const cppstem &o); \
626 \
627 public:
628
629 #define EV_END_WATCHER(cppstem,cstem) \
630 };
631
632 EV_BEGIN_WATCHER (io, io)
633 void set (int fd, int events) EV_NOEXCEPT
634 {
635 freeze_guard freeze (this);
636 ev_io_set (static_cast<ev_io *>(this), fd, events);
637 }
638
639 void set (int events) EV_NOEXCEPT
640 {
641 freeze_guard freeze (this);
642 ev_io_modify (static_cast<ev_io *>(this), events);
643 }
644
645 void start (int fd, int events) EV_NOEXCEPT
646 {
647 set (fd, events);
648 start ();
649 }
650 EV_END_WATCHER (io, io)
651
652 EV_BEGIN_WATCHER (timer, timer)
653 void set (ev_tstamp after, ev_tstamp repeat = 0.) EV_NOEXCEPT
654 {
655 freeze_guard freeze (this);
656 ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
657 }
658
659 void start (ev_tstamp after, ev_tstamp repeat = 0.) EV_NOEXCEPT
660 {
661 set (after, repeat);
662 start ();
663 }
664
665 void again () EV_NOEXCEPT
666 {
667 ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
668 }
669
670 ev_tstamp remaining ()
671 {
672 return ev_timer_remaining (EV_A_ static_cast<ev_timer *>(this));
673 }
674 EV_END_WATCHER (timer, timer)
675
676 #if EV_PERIODIC_ENABLE
677 EV_BEGIN_WATCHER (periodic, periodic)
678 void set (ev_tstamp at, ev_tstamp interval = 0.) EV_NOEXCEPT
679 {
680 freeze_guard freeze (this);
681 ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
682 }
683
684 void start (ev_tstamp at, ev_tstamp interval = 0.) EV_NOEXCEPT
685 {
686 set (at, interval);
687 start ();
688 }
689
690 void again () EV_NOEXCEPT
691 {
692 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
693 }
694 EV_END_WATCHER (periodic, periodic)
695 #endif
696
697 #if EV_SIGNAL_ENABLE
698 EV_BEGIN_WATCHER (sig, signal)
699 void set (int signum) EV_NOEXCEPT
700 {
701 freeze_guard freeze (this);
702 ev_signal_set (static_cast<ev_signal *>(this), signum);
703 }
704
705 void start (int signum) EV_NOEXCEPT
706 {
707 set (signum);
708 start ();
709 }
710 EV_END_WATCHER (sig, signal)
711 #endif
712
713 #if EV_CHILD_ENABLE
714 EV_BEGIN_WATCHER (child, child)
715 void set (int pid, int trace = 0) EV_NOEXCEPT
716 {
717 freeze_guard freeze (this);
718 ev_child_set (static_cast<ev_child *>(this), pid, trace);
719 }
720
721 void start (int pid, int trace = 0) EV_NOEXCEPT
722 {
723 set (pid, trace);
724 start ();
725 }
726 EV_END_WATCHER (child, child)
727 #endif
728
729 #if EV_STAT_ENABLE
730 EV_BEGIN_WATCHER (stat, stat)
731 void set (const char *path, ev_tstamp interval = 0.) EV_NOEXCEPT
732 {
733 freeze_guard freeze (this);
734 ev_stat_set (static_cast<ev_stat *>(this), path, interval);
735 }
736
737 void start (const char *path, ev_tstamp interval = 0.) EV_NOEXCEPT
738 {
739 stop ();
740 set (path, interval);
741 start ();
742 }
743
744 void update () EV_NOEXCEPT
745 {
746 ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
747 }
748 EV_END_WATCHER (stat, stat)
749 #endif
750
751 #if EV_IDLE_ENABLE
752 EV_BEGIN_WATCHER (idle, idle)
753 void set () EV_NOEXCEPT { }
754 EV_END_WATCHER (idle, idle)
755 #endif
756
757 #if EV_PREPARE_ENABLE
758 EV_BEGIN_WATCHER (prepare, prepare)
759 void set () EV_NOEXCEPT { }
760 EV_END_WATCHER (prepare, prepare)
761 #endif
762
763 #if EV_CHECK_ENABLE
764 EV_BEGIN_WATCHER (check, check)
765 void set () EV_NOEXCEPT { }
766 EV_END_WATCHER (check, check)
767 #endif
768
769 #if EV_EMBED_ENABLE
770 EV_BEGIN_WATCHER (embed, embed)
771 void set_embed (struct ev_loop *embedded_loop) EV_NOEXCEPT
772 {
773 freeze_guard freeze (this);
774 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
775 }
776
777 void start (struct ev_loop *embedded_loop) EV_NOEXCEPT
778 {
779 set (embedded_loop);
780 start ();
781 }
782
783 void sweep ()
784 {
785 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
786 }
787 EV_END_WATCHER (embed, embed)
788 #endif
789
790 #if EV_FORK_ENABLE
791 EV_BEGIN_WATCHER (fork, fork)
792 void set () EV_NOEXCEPT { }
793 EV_END_WATCHER (fork, fork)
794 #endif
795
796 #if EV_ASYNC_ENABLE
797 EV_BEGIN_WATCHER (async, async)
798 void send () EV_NOEXCEPT
799 {
800 ev_async_send (EV_A_ static_cast<ev_async *>(this));
801 }
802
803 bool async_pending () EV_NOEXCEPT
804 {
805 return ev_async_pending (static_cast<ev_async *>(this));
806 }
807 EV_END_WATCHER (async, async)
808 #endif
809
810 #undef EV_PX
811 #undef EV_PX_
812 #undef EV_CONSTRUCT
813 #undef EV_BEGIN_WATCHER
814 #undef EV_END_WATCHER
815 }
816
817 #endif
818