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Revision: 1.43
Committed: Wed Nov 5 14:36:18 2008 UTC (15 years, 8 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: rel-3_49
Changes since 1.42: +2 -1 lines
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File Contents

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