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/cvs/libev/ev++.h
Revision: 1.39
Committed: Tue Apr 15 04:34:07 2008 UTC (16 years, 3 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: rel-3_31, rel-3_3
Changes since 1.38: +32 -8 lines
Log Message:
*** empty log message ***

File Contents

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