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/cvs/libev/ev++.h
Revision: 1.38
Committed: Mon Jan 28 11:43:37 2008 UTC (16 years, 5 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: rel-3_2, rel-3_1, rel-3_0
Changes since 1.37: +0 -3 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 EMBED = EV_EMBED,
76 ERROR = EV_ERROR,
77 };
78
79 enum
80 {
81 AUTO = EVFLAG_AUTO,
82 NOENV = EVFLAG_NOENV,
83 FORKCHECK = EVFLAG_FORKCHECK,
84 SELECT = EVBACKEND_SELECT,
85 POLL = EVBACKEND_POLL,
86 EPOLL = EVBACKEND_EPOLL,
87 KQUEUE = EVBACKEND_KQUEUE,
88 DEVPOLL = EVBACKEND_DEVPOLL,
89 PORT = EVBACKEND_PORT
90 };
91
92 enum
93 {
94 NONBLOCK = EVLOOP_NONBLOCK,
95 ONESHOT = EVLOOP_ONESHOT
96 };
97
98 enum how_t
99 {
100 ONE = EVUNLOOP_ONE,
101 ALL = EVUNLOOP_ALL
102 };
103
104 struct bad_loop
105 #if EV_USE_STDEXCEPT
106 : std::runtime_error
107 #endif
108 {
109 #if EV_USE_STDEXCEPT
110 bad_loop ()
111 : std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
112 {
113 }
114 #endif
115 };
116
117 #ifdef EV_AX
118 # undef EV_AX
119 #endif
120
121 #ifdef EV_AX_
122 # undef EV_AX_
123 #endif
124
125 #if EV_MULTIPLICITY
126 # define EV_AX raw_loop
127 # define EV_AX_ raw_loop,
128 #else
129 # define EV_AX
130 # define EV_AX_
131 #endif
132
133 struct loop_ref
134 {
135 loop_ref (EV_P) throw ()
136 #if EV_MULTIPLICITY
137 : EV_AX (EV_A)
138 #endif
139 {
140 }
141
142 bool operator == (const loop_ref &other) const throw ()
143 {
144 #if EV_MULTIPLICITY
145 return EV_AX == other.EV_AX;
146 #else
147 return true;
148 #endif
149 }
150
151 bool operator != (const loop_ref &other) const throw ()
152 {
153 #if EV_MULTIPLICITY
154 return ! (*this == other);
155 #else
156 return false;
157 #endif
158 }
159
160 #if EV_MULTIPLICITY
161 bool operator == (struct ev_loop *other) const throw ()
162 {
163 return this->EV_AX == other;
164 }
165
166 bool operator != (struct ev_loop *other) const throw ()
167 {
168 return ! (*this == other);
169 }
170
171 bool operator == (const struct ev_loop *other) const throw ()
172 {
173 return this->EV_AX == other;
174 }
175
176 bool operator != (const struct ev_loop *other) const throw ()
177 {
178 return (*this == other);
179 }
180
181 operator struct ev_loop * () const throw ()
182 {
183 return EV_AX;
184 }
185
186 operator const struct ev_loop * () const throw ()
187 {
188 return EV_AX;
189 }
190
191 bool is_default () const throw ()
192 {
193 return EV_AX == ev_default_loop (0);
194 }
195 #endif
196
197 void loop (int flags = 0)
198 {
199 ev_loop (EV_AX_ flags);
200 }
201
202 void unloop (how_t how = ONE) throw ()
203 {
204 ev_unloop (EV_AX_ how);
205 }
206
207 void post_fork () throw ()
208 {
209 #if EV_MULTIPLICITY
210 ev_loop_fork (EV_AX);
211 #else
212 ev_default_fork ();
213 #endif
214 }
215
216 unsigned int count () const throw ()
217 {
218 return ev_loop_count (EV_AX);
219 }
220
221 unsigned int backend () const throw ()
222 {
223 return ev_backend (EV_AX);
224 }
225
226 tstamp now () const throw ()
227 {
228 return ev_now (EV_AX);
229 }
230
231 void ref () throw ()
232 {
233 ev_ref (EV_AX);
234 }
235
236 void unref () throw ()
237 {
238 ev_unref (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
251 // function callback
252 void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void* arg = 0) throw ()
253 {
254 ev_once (EV_AX_ fd, events, timeout, cb, arg);
255 }
256
257 // method callback
258 template<class K, void (K::*method)(int)>
259 void once (int fd, int events, tstamp timeout, K *object) throw ()
260 {
261 once (fd, events, timeout, method_thunk<K, method>, object);
262 }
263
264 template<class K, void (K::*method)(int)>
265 static void method_thunk (int revents, void* arg)
266 {
267 K *obj = static_cast<K *>(arg);
268 (obj->*method) (revents);
269 }
270
271 // const method callback
272 template<class K, void (K::*method)(int) const>
273 void once (int fd, int events, tstamp timeout, const K *object) throw ()
274 {
275 once (fd, events, timeout, const_method_thunk<K, method>, object);
276 }
277
278 template<class K, void (K::*method)(int) const>
279 static void const_method_thunk (int revents, void* arg)
280 {
281 K *obj = static_cast<K *>(arg);
282 (obj->*method) (revents);
283 }
284
285 // simple method callback
286 template<class K, void (K::*method)()>
287 void once (int fd, int events, tstamp timeout, K *object) throw ()
288 {
289 once (fd, events, timeout, method_noargs_thunk<K, method>, object);
290 }
291
292 template<class K, void (K::*method)()>
293 static void method_noargs_thunk (int revents, void* arg)
294 {
295 K *obj = static_cast<K *>(arg);
296 (obj->*method) ();
297 }
298
299 // simpler function callback
300 template<void (*cb)(int)>
301 void once (int fd, int events, tstamp timeout) throw ()
302 {
303 once (fd, events, timeout, simpler_func_thunk<cb>);
304 }
305
306 template<void (*cb)(int)>
307 static void simpler_func_thunk (int revents, void* arg)
308 {
309 (*cb) (revents);
310 }
311
312 // simplest function callback
313 template<void (*cb)()>
314 void once (int fd, int events, tstamp timeout) throw ()
315 {
316 once (fd, events, timeout, simplest_func_thunk<cb>);
317 }
318
319 template<void (*cb)()>
320 static void simplest_func_thunk (int revents, void* arg)
321 {
322 (*cb) ();
323 }
324
325 void feed_fd_event (int fd, int revents) throw ()
326 {
327 ev_feed_fd_event (EV_AX_ fd, revents);
328 }
329
330 void feed_signal_event (int signum) throw ()
331 {
332 ev_feed_signal_event (EV_AX_ signum);
333 }
334
335 #if EV_MULTIPLICITY
336 struct ev_loop* EV_AX;
337 #endif
338
339 };
340
341 #if EV_MULTIPLICITY
342 struct dynamic_loop : loop_ref
343 {
344
345 dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
346 : loop_ref (ev_loop_new (flags))
347 {
348 if (!EV_AX)
349 throw bad_loop ();
350 }
351
352 ~dynamic_loop () throw ()
353 {
354 ev_loop_destroy (EV_AX);
355 EV_AX = 0;
356 }
357
358 private:
359
360 dynamic_loop (const dynamic_loop &);
361
362 dynamic_loop & operator= (const dynamic_loop &);
363
364 };
365 #endif
366
367 struct default_loop : loop_ref
368 {
369 default_loop (unsigned int flags = AUTO) throw (bad_loop)
370 #if EV_MULTIPLICITY
371 : loop_ref (ev_default_loop (flags))
372 #endif
373 {
374 if (
375 #if EV_MULTIPLICITY
376 !EV_AX
377 #else
378 !ev_default_loop (flags)
379 #endif
380 )
381 throw bad_loop ();
382 }
383
384 ~default_loop () throw ()
385 {
386 ev_default_destroy ();
387 }
388
389 private:
390 default_loop (const default_loop &);
391 default_loop &operator = (const default_loop &);
392 };
393
394 inline loop_ref get_default_loop () throw ()
395 {
396 #if EV_MULTIPLICITY
397 return ev_default_loop (0);
398 #else
399 return loop_ref ();
400 #endif
401 }
402
403 #undef EV_AX
404 #undef EV_AX_
405
406 #undef EV_PX
407 #undef EV_PX_
408 #if EV_MULTIPLICITY
409 # define EV_PX loop_ref EV_A
410 # define EV_PX_ loop_ref EV_A_
411 #else
412 # define EV_PX
413 # define EV_PX_
414 #endif
415
416 template<class ev_watcher, class watcher>
417 struct base : ev_watcher
418 {
419 #if EV_MULTIPLICITY
420 EV_PX;
421
422 void set (EV_PX) throw ()
423 {
424 this->EV_A = EV_A;
425 }
426 #endif
427
428 base (EV_PX) throw ()
429 #if EV_MULTIPLICITY
430 : EV_A (EV_A)
431 #endif
432 {
433 ev_init (this, 0);
434 }
435
436 void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
437 {
438 this->data = data;
439 ev_set_cb (static_cast<ev_watcher *>(this), cb);
440 }
441
442 // method callback
443 template<class K, void (K::*method)(watcher &w, int)>
444 void set (K *object) throw ()
445 {
446 set_ (object, method_thunk<K, method>);
447 }
448
449 template<class K, void (K::*method)(watcher &w, int)>
450 static void method_thunk (EV_P_ ev_watcher *w, int revents)
451 {
452 K *obj = static_cast<K *>(w->data);
453 (obj->*method) (*static_cast<watcher *>(w), revents);
454 }
455
456 // const method callback
457 template<class K, void (K::*method)(watcher &w, int) const>
458 void set (const K *object) throw ()
459 {
460 set_ (object, const_method_thunk<K, method>);
461 }
462
463 template<class K, void (K::*method)(watcher &w, int) const>
464 static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
465 {
466 K *obj = static_cast<K *>(w->data);
467 (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
468 }
469
470 // function callback
471 template<void (*function)(watcher &w, int)>
472 void set (void *data = 0) throw ()
473 {
474 set_ (data, function_thunk<function>);
475 }
476
477 template<void (*function)(watcher &w, int)>
478 static void function_thunk (EV_P_ ev_watcher *w, int revents)
479 {
480 function (*static_cast<watcher *>(w), revents);
481 }
482
483 // simple callback
484 template<class K, void (K::*method)()>
485 void set (K *object) throw ()
486 {
487 set_ (object, method_noargs_thunk<K, method>);
488 }
489
490 template<class K, void (K::*method)()>
491 static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
492 {
493 K *obj = static_cast<K *>(w->data);
494 (obj->*method) ();
495 }
496
497 void operator ()(int events = EV_UNDEF)
498 {
499 return ev_cb (static_cast<ev_watcher *>(this))
500 (static_cast<ev_watcher *>(this), events);
501 }
502
503 bool is_active () const throw ()
504 {
505 return ev_is_active (static_cast<const ev_watcher *>(this));
506 }
507
508 bool is_pending () const throw ()
509 {
510 return ev_is_pending (static_cast<const ev_watcher *>(this));
511 }
512
513 void feed_event (int revents) throw ()
514 {
515 ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
516 }
517 };
518
519 inline tstamp now () throw ()
520 {
521 return ev_time ();
522 }
523
524 inline void delay (tstamp interval) throw ()
525 {
526 ev_sleep (interval);
527 }
528
529 inline int version_major () throw ()
530 {
531 return ev_version_major ();
532 }
533
534 inline int version_minor () throw ()
535 {
536 return ev_version_minor ();
537 }
538
539 inline unsigned int supported_backends () throw ()
540 {
541 return ev_supported_backends ();
542 }
543
544 inline unsigned int recommended_backends () throw ()
545 {
546 return ev_recommended_backends ();
547 }
548
549 inline unsigned int embeddable_backends () throw ()
550 {
551 return ev_embeddable_backends ();
552 }
553
554 inline void set_allocator (void *(*cb)(void *ptr, long size)) throw ()
555 {
556 ev_set_allocator (cb);
557 }
558
559 inline void set_syserr_cb (void (*cb)(const char *msg)) throw ()
560 {
561 ev_set_syserr_cb (cb);
562 }
563
564 #if EV_MULTIPLICITY
565 #define EV_CONSTRUCT(cppstem,cstem) \
566 (EV_PX = get_default_loop ()) throw () \
567 : base<ev_ ## cstem, cppstem> (EV_A) \
568 { \
569 }
570 #else
571 #define EV_CONSTRUCT(cppstem,cstem) \
572 () throw () \
573 { \
574 }
575 #endif
576
577 /* using a template here would require quite a bit more lines,
578 * so a macro solution was chosen */
579 #define EV_BEGIN_WATCHER(cppstem,cstem) \
580 \
581 struct cppstem : base<ev_ ## cstem, cppstem> \
582 { \
583 void start () throw () \
584 { \
585 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
586 } \
587 \
588 void stop () throw () \
589 { \
590 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
591 } \
592 \
593 cppstem EV_CONSTRUCT(cppstem,cstem) \
594 \
595 ~cppstem () throw () \
596 { \
597 stop (); \
598 } \
599 \
600 using base<ev_ ## cstem, cppstem>::set; \
601 \
602 private: \
603 \
604 cppstem (const cppstem &o); \
605 \
606 cppstem & operator =(const cppstem &o); \
607 \
608 public:
609
610 #define EV_END_WATCHER(cppstem,cstem) \
611 };
612
613 EV_BEGIN_WATCHER (io, io)
614 void set (int fd, int events) throw ()
615 {
616 int active = is_active ();
617 if (active) stop ();
618 ev_io_set (static_cast<ev_io *>(this), fd, events);
619 if (active) start ();
620 }
621
622 void set (int events) throw ()
623 {
624 int active = is_active ();
625 if (active) stop ();
626 ev_io_set (static_cast<ev_io *>(this), fd, events);
627 if (active) start ();
628 }
629
630 void start (int fd, int events) throw ()
631 {
632 set (fd, events);
633 start ();
634 }
635 EV_END_WATCHER (io, io)
636
637 EV_BEGIN_WATCHER (timer, timer)
638 void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
639 {
640 int active = is_active ();
641 if (active) stop ();
642 ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
643 if (active) start ();
644 }
645
646 void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
647 {
648 set (after, repeat);
649 start ();
650 }
651
652 void again () throw ()
653 {
654 ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
655 }
656 EV_END_WATCHER (timer, timer)
657
658 #if EV_PERIODIC_ENABLE
659 EV_BEGIN_WATCHER (periodic, periodic)
660 void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
661 {
662 int active = is_active ();
663 if (active) stop ();
664 ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
665 if (active) start ();
666 }
667
668 void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
669 {
670 set (at, interval);
671 start ();
672 }
673
674 void again () throw ()
675 {
676 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
677 }
678 EV_END_WATCHER (periodic, periodic)
679 #endif
680
681 EV_BEGIN_WATCHER (sig, signal)
682 void set (int signum) throw ()
683 {
684 int active = is_active ();
685 if (active) stop ();
686 ev_signal_set (static_cast<ev_signal *>(this), signum);
687 if (active) start ();
688 }
689
690 void start (int signum) throw ()
691 {
692 set (signum);
693 start ();
694 }
695 EV_END_WATCHER (sig, signal)
696
697 EV_BEGIN_WATCHER (child, child)
698 void set (int pid, int trace = 0) throw ()
699 {
700 int active = is_active ();
701 if (active) stop ();
702 ev_child_set (static_cast<ev_child *>(this), pid, trace);
703 if (active) start ();
704 }
705
706 void start (int pid, int trace = 0) throw ()
707 {
708 set (pid, trace);
709 start ();
710 }
711 EV_END_WATCHER (child, child)
712
713 #if EV_STAT_ENABLE
714 EV_BEGIN_WATCHER (stat, stat)
715 void set (const char *path, ev_tstamp interval = 0.) throw ()
716 {
717 int active = is_active ();
718 if (active) stop ();
719 ev_stat_set (static_cast<ev_stat *>(this), path, interval);
720 if (active) start ();
721 }
722
723 void start (const char *path, ev_tstamp interval = 0.) throw ()
724 {
725 stop ();
726 set (path, interval);
727 start ();
728 }
729
730 void update () throw ()
731 {
732 ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
733 }
734 EV_END_WATCHER (stat, stat)
735 #endif
736
737 EV_BEGIN_WATCHER (idle, idle)
738 void set () throw () { }
739 EV_END_WATCHER (idle, idle)
740
741 EV_BEGIN_WATCHER (prepare, prepare)
742 void set () throw () { }
743 EV_END_WATCHER (prepare, prepare)
744
745 EV_BEGIN_WATCHER (check, check)
746 void set () throw () { }
747 EV_END_WATCHER (check, check)
748
749 #if EV_EMBED_ENABLE
750 EV_BEGIN_WATCHER (embed, embed)
751 void start (struct ev_loop *embedded_loop) throw ()
752 {
753 stop ();
754 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
755 start ();
756 }
757
758 void sweep ()
759 {
760 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
761 }
762 EV_END_WATCHER (embed, embed)
763 #endif
764
765 #if EV_FORK_ENABLE
766 EV_BEGIN_WATCHER (fork, fork)
767 void set () throw () { }
768 EV_END_WATCHER (fork, fork)
769 #endif
770
771 #undef EV_PX
772 #undef EV_PX_
773 #undef EV_CONSTRUCT
774 #undef EV_BEGIN_WATCHER
775 #undef EV_END_WATCHER
776 }
777
778 #endif
779