ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev++.h
Revision: 1.47
Committed: Sat Dec 26 09:21:54 2009 UTC (14 years, 6 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: rel-3_9
Changes since 1.46: +5 -0 lines
Log Message:
*** empty log message ***

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