2 * libev simple C++ wrapper classes
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
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49 #ifndef EV_USE_STDEXCEPT
50 # define EV_USE_STDEXCEPT 1
59 typedef ev_tstamp tstamp;
67 PERIODIC = EV_PERIODIC,
83 FORKCHECK = EVFLAG_FORKCHECK,
84 SELECT = EVBACKEND_SELECT,
85 POLL = EVBACKEND_POLL,
86 EPOLL = EVBACKEND_EPOLL,
87 KQUEUE = EVBACKEND_KQUEUE,
88 DEVPOLL = EVBACKEND_DEVPOLL,
94 NONBLOCK = EVLOOP_NONBLOCK,
95 ONESHOT = EVLOOP_ONESHOT
111 : std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
126 # define EV_AX raw_loop
127 # define EV_AX_ raw_loop,
138 throw (bad_loop) : EV_AX (EV_A)
149 bool operator == (const loop_ref &other) const throw ()
152 return EV_AX == other.EV_AX;
158 bool operator != (const loop_ref &other) const throw ()
161 return ! (*this == other);
168 bool operator== (struct ev_loop *other) const throw ()
170 return this->EV_AX == other;
173 bool operator!= (struct ev_loop *other) const throw ()
175 return ! (*this == other);
178 bool operator== (const struct ev_loop *other) const throw ()
180 return this->EV_AX == other;
183 bool operator!= (const struct ev_loop *other) const throw ()
185 return (*this == other);
188 operator struct ev_loop * () const throw ()
193 operator const struct ev_loop * () const throw ()
198 bool is_default () const throw ()
200 return EV_AX == ev_default_loop (0);
204 void loop (int flags = 0)
206 ev_loop (EV_AX_ flags);
209 void unloop (how_t how = ONE) throw ()
211 ev_unloop (EV_AX_ how);
214 void post_fork () throw ()
217 ev_loop_fork (EV_AX);
223 unsigned int count () const throw ()
225 return ev_loop_count (EV_AX);
228 unsigned int backend () const throw ()
230 return ev_backend (EV_AX);
233 tstamp now () const throw ()
235 return ev_now (EV_AX);
243 void unref () throw ()
248 void set_io_collect_interval (tstamp interval) throw ()
250 ev_set_io_collect_interval (EV_AX_ interval);
253 void set_timeout_collect_interval (tstamp interval) throw ()
255 ev_set_timeout_collect_interval (EV_AX_ interval);
259 void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void* arg = 0) throw ()
261 ev_once (EV_AX_ fd, events, timeout, cb, arg);
265 template<class K, void (K::*method)(int)>
266 void once (int fd, int events, tstamp timeout, K *object) throw ()
268 once (fd, events, timeout, method_thunk<K, method>, object);
271 template<class K, void (K::*method)(int)>
272 static void method_thunk (int revents, void* arg)
274 K *obj = static_cast<K *>(arg);
275 (obj->*method) (revents);
278 // const method callback
279 template<class K, void (K::*method)(int) const>
280 void once (int fd, int events, tstamp timeout, const K *object) throw ()
282 once (fd, events, timeout, const_method_thunk<K, method>, object);
285 template<class K, void (K::*method)(int) const>
286 static void const_method_thunk (int revents, void* arg)
288 K *obj = static_cast<K *>(arg);
289 (obj->*method) (revents);
292 // simple method callback
293 template<class K, void (K::*method)()>
294 void once (int fd, int events, tstamp timeout, K *object) throw ()
296 once (fd, events, timeout, method_noargs_thunk<K, method>, object);
299 template<class K, void (K::*method)()>
300 static void method_noargs_thunk (int revents, void* arg)
302 K *obj = static_cast<K *>(arg);
306 // simpler function callback
307 template<void (*cb)(int)>
308 void once (int fd, int events, tstamp timeout) throw ()
310 once (fd, events, timeout, simpler_func_thunk<cb>);
313 template<void (*cb)(int)>
314 static void simpler_func_thunk (int revents, void* arg)
319 // simplest function callback
320 template<void (*cb)()>
321 void once (int fd, int events, tstamp timeout) throw ()
323 once (fd, events, timeout, simplest_func_thunk<cb>);
326 template<void (*cb)()>
327 static void simplest_func_thunk (int revents, void* arg)
332 void feed_fd_event (int fd, int revents) throw ()
334 ev_feed_fd_event (EV_AX_ fd, revents);
337 void feed_signal_event (int signum) throw ()
339 ev_feed_signal_event (EV_AX_ signum);
343 struct ev_loop* EV_AX;
349 struct dynamic_loop: loop_ref
352 dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
353 : loop_ref (ev_loop_new (flags))
357 ~dynamic_loop () throw ()
359 ev_loop_destroy (EV_AX);
365 dynamic_loop (const dynamic_loop &);
367 dynamic_loop & operator= (const dynamic_loop &);
372 struct default_loop: loop_ref
375 default_loop (unsigned int flags = AUTO) throw (bad_loop)
377 : loop_ref (ev_default_loop (flags))
381 if (!ev_default_loop (flags))
386 ~default_loop () throw ()
388 ev_default_destroy ();
392 default_loop (const default_loop &);
393 default_loop &operator = (const default_loop &);
396 inline loop_ref get_default_loop () throw ()
399 return ev_default_loop (0);
411 # define EV_PX loop_ref EV_A
412 # define EV_PX_ loop_ref EV_A_
418 template<class ev_watcher, class watcher>
419 struct base : ev_watcher
424 void set (EV_PX) throw ()
430 base (EV_PX) throw ()
438 void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
441 ev_set_cb (static_cast<ev_watcher *>(this), cb);
445 template<class K, void (K::*method)(watcher &w, int)>
446 void set (K *object) throw ()
448 set_ (object, method_thunk<K, method>);
451 template<class K, void (K::*method)(watcher &w, int)>
452 static void method_thunk (EV_P_ ev_watcher *w, int revents)
454 K *obj = static_cast<K *>(w->data);
455 (obj->*method) (*static_cast<watcher *>(w), revents);
458 // const method callback
459 template<class K, void (K::*method)(watcher &w, int) const>
460 void set (const K *object) throw ()
462 set_ (object, const_method_thunk<K, method>);
465 template<class K, void (K::*method)(watcher &w, int) const>
466 static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
468 K *obj = static_cast<K *>(w->data);
469 (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
473 template<void (*function)(watcher &w, int)>
474 void set (void *data = 0) throw ()
476 set_ (data, function_thunk<function>);
479 template<void (*function)(watcher &w, int)>
480 static void function_thunk (EV_P_ ev_watcher *w, int revents)
482 function (*static_cast<watcher *>(w), revents);
486 template<class K, void (K::*method)()>
487 void set (K *object) throw ()
489 set_ (object, method_noargs_thunk<K, method>);
492 template<class K, void (K::*method)()>
493 static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
495 K *obj = static_cast<K *>(w->data);
499 void operator ()(int events = EV_UNDEF)
501 return ev_cb (static_cast<ev_watcher *>(this))
502 (static_cast<ev_watcher *>(this), events);
505 bool is_active () const throw ()
507 return ev_is_active (static_cast<const ev_watcher *>(this));
510 bool is_pending () const throw ()
512 return ev_is_pending (static_cast<const ev_watcher *>(this));
515 void feed_event (int revents) throw ()
517 ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
521 inline tstamp now () throw ()
526 inline void delay (tstamp interval) throw ()
531 inline int version_major () throw ()
533 return ev_version_major ();
536 inline int version_minor () throw ()
538 return ev_version_minor ();
541 inline unsigned int supported_backends () throw ()
543 return ev_supported_backends ();
546 inline unsigned int recommended_backends () throw ()
548 return ev_recommended_backends ();
551 inline unsigned int embeddable_backends () throw ()
553 return ev_embeddable_backends ();
556 inline void set_allocator (void *(*cb)(void *ptr, long size)) throw ()
558 ev_set_allocator (cb);
561 inline void set_syserr_cb (void (*cb)(const char *msg)) throw ()
563 ev_set_syserr_cb (cb);
567 #define EV_CONSTRUCT(cppstem,cstem) \
568 (EV_PX = get_default_loop ()) throw () \
569 : base<ev_ ## cstem, cppstem> (EV_A) \
573 #define EV_CONSTRUCT(cppstem,cstem) \
579 /* using a template here would require quite a bit more lines,
580 * so a macro solution was chosen */
581 #define EV_BEGIN_WATCHER(cppstem,cstem) \
583 struct cppstem : base<ev_ ## cstem, cppstem> \
585 void start () throw () \
587 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
590 void stop () throw () \
592 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
595 cppstem EV_CONSTRUCT(cppstem,cstem) \
597 ~cppstem () throw () \
602 using base<ev_ ## cstem, cppstem>::set; \
606 cppstem (const cppstem &o); \
608 cppstem & operator =(const cppstem &o); \
612 #define EV_END_WATCHER(cppstem,cstem) \
615 EV_BEGIN_WATCHER (io, io)
616 void set (int fd, int events) throw ()
618 int active = is_active ();
620 ev_io_set (static_cast<ev_io *>(this), fd, events);
621 if (active) start ();
624 void set (int events) throw ()
626 int active = is_active ();
628 ev_io_set (static_cast<ev_io *>(this), fd, events);
629 if (active) start ();
632 void start (int fd, int events) throw ()
637 EV_END_WATCHER (io, io)
639 EV_BEGIN_WATCHER (timer, timer)
640 void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
642 int active = is_active ();
644 ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
645 if (active) start ();
648 void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
654 void again () throw ()
656 ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
658 EV_END_WATCHER (timer, timer)
660 #if EV_PERIODIC_ENABLE
661 EV_BEGIN_WATCHER (periodic, periodic)
662 void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
664 int active = is_active ();
666 ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
667 if (active) start ();
670 void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
676 void again () throw ()
678 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
680 EV_END_WATCHER (periodic, periodic)
683 EV_BEGIN_WATCHER (sig, signal)
684 void set (int signum) throw ()
686 int active = is_active ();
688 ev_signal_set (static_cast<ev_signal *>(this), signum);
689 if (active) start ();
692 void start (int signum) throw ()
697 EV_END_WATCHER (sig, signal)
699 EV_BEGIN_WATCHER (child, child)
700 void set (int pid) throw ()
702 int active = is_active ();
704 ev_child_set (static_cast<ev_child *>(this), pid);
705 if (active) start ();
708 void start (int pid) throw ()
713 EV_END_WATCHER (child, child)
716 EV_BEGIN_WATCHER (stat, stat)
717 void set (const char *path, ev_tstamp interval = 0.) throw ()
719 int active = is_active ();
721 ev_stat_set (static_cast<ev_stat *>(this), path, interval);
722 if (active) start ();
725 void start (const char *path, ev_tstamp interval = 0.) throw ()
728 set (path, interval);
732 void update () throw ()
734 ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
736 EV_END_WATCHER (stat, stat)
739 EV_BEGIN_WATCHER (idle, idle)
740 void set () throw () { }
741 EV_END_WATCHER (idle, idle)
743 EV_BEGIN_WATCHER (prepare, prepare)
744 void set () throw () { }
745 EV_END_WATCHER (prepare, prepare)
747 EV_BEGIN_WATCHER (check, check)
748 void set () throw () { }
749 EV_END_WATCHER (check, check)
752 EV_BEGIN_WATCHER (embed, embed)
753 void start (struct ev_loop *embedded_loop) throw ()
756 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
762 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
764 EV_END_WATCHER (embed, embed)
768 EV_BEGIN_WATCHER (fork, fork)
769 void set () throw () { }
770 EV_END_WATCHER (fork, fork)
776 #undef EV_BEGIN_WATCHER
777 #undef EV_END_WATCHER