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:
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
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49 #ifndef EV_CXX_EXCEPTIONS
50 #define EV_CXX_EXCEPTIONS 1
56 # define EV_THROW(exception) throw (exception)
58 # define EV_THROW(exception)
63 typedef ev_tstamp tstamp;
71 PERIODIC = EV_PERIODIC,
87 FORKCHECK = EVFLAG_FORKCHECK,
88 SELECT = EVBACKEND_SELECT,
89 POLL = EVBACKEND_POLL,
90 EPOLL = EVBACKEND_EPOLL,
91 KQUEUE = EVBACKEND_KQUEUE,
92 DEVPOLL = EVBACKEND_DEVPOLL,
98 NONBLOCK = EVLOOP_NONBLOCK,
99 ONESHOT = EVLOOP_ONESHOT
108 #if EV_CXX_EXCEPTIONS
109 struct bad_loop: std::runtime_error
112 : std::runtime_error("loop can't be initialized") {}
125 # define EV_AX raw_loop
126 # define EV_AX_ raw_loop,
137 EV_THROW (bad_loop) : EV_AX (EV_A)
140 #if EV_MULTIPLICIY && EV_CXX_EXCEPTIONS
146 bool operator== (const loop_ref &other) const EV_THROW ()
149 return this->EV_AX == other.EV_AX;
155 bool operator!= (const loop_ref &other) const EV_THROW ()
158 return ! (*this == other);
165 bool operator== (struct ev_loop *other) const EV_THROW ()
167 return this->EV_AX == other;
170 bool operator!= (struct ev_loop *other) const EV_THROW ()
172 return ! (*this == other);
175 bool operator== (const struct ev_loop *other) const EV_THROW ()
177 return this->EV_AX == other;
180 bool operator!= (const struct ev_loop *other) const EV_THROW ()
182 return (*this == other);
185 operator struct ev_loop * () const EV_THROW ()
190 operator const struct ev_loop * () const EV_THROW ()
195 bool is_default () const EV_THROW ()
197 return EV_AX == ev_default_loop (0);
201 void loop (int flags = 0)
203 ev_loop (EV_AX_ flags);
206 void unloop (how_t how = ONE) EV_THROW ()
208 ev_unloop (EV_AX_ how);
211 void post_fork () EV_THROW ()
214 ev_loop_fork (EV_AX);
220 unsigned int count () const EV_THROW ()
222 return ev_loop_count (EV_AX);
225 unsigned int backend () const EV_THROW ()
227 return ev_backend (EV_AX);
230 tstamp now () const EV_THROW ()
232 return ev_now (EV_AX);
235 void ref () EV_THROW ()
240 void unref () EV_THROW ()
245 void set_io_collect_interval (tstamp interval) EV_THROW ()
247 ev_set_io_collect_interval (EV_AX_ interval);
250 void set_timeout_collect_interval (tstamp interval) EV_THROW ()
252 ev_set_timeout_collect_interval (EV_AX_ interval);
256 void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void* arg = 0) EV_THROW ()
258 ev_once (EV_AX_ fd, events, timeout, cb, arg);
262 template<class K, void (K::*method)(int)>
263 void once (int fd, int events, tstamp timeout, K *object) EV_THROW ()
265 once (fd, events, timeout, method_thunk<K, method>, object);
268 template<class K, void (K::*method)(int)>
269 static void method_thunk (int revents, void* arg)
271 K *obj = static_cast<K *>(arg);
272 (obj->*method) (revents);
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) EV_THROW ()
279 once (fd, events, timeout, const_method_thunk<K, method>, object);
282 template<class K, void (K::*method)(int) const>
283 static void const_method_thunk (int revents, void* arg)
285 K *obj = static_cast<K *>(arg);
286 (obj->*method) (revents);
289 // simple method callback
290 template<class K, void (K::*method)()>
291 void once (int fd, int events, tstamp timeout, K *object) EV_THROW ()
293 once (fd, events, timeout, method_noargs_thunk<K, method>, object);
296 template<class K, void (K::*method)()>
297 static void method_noargs_thunk (int revents, void* arg)
299 K *obj = static_cast<K *>(arg);
303 // simpler function callback
304 template<void (*cb)(int)>
305 void once (int fd, int events, tstamp timeout) EV_THROW ()
307 once (fd, events, timeout, simpler_func_thunk<cb>);
310 template<void (*cb)(int)>
311 static void simpler_func_thunk (int revents, void* arg)
316 // simplest function callback
317 template<void (*cb)()>
318 void once (int fd, int events, tstamp timeout) EV_THROW ()
320 once (fd, events, timeout, simplest_func_thunk<cb>);
323 template<void (*cb)()>
324 static void simplest_func_thunk (int revents, void* arg)
329 void feed_fd_event (int fd, int revents) EV_THROW ()
331 ev_feed_fd_event (EV_AX_ fd, revents);
334 void feed_signal_event (int signum) EV_THROW ()
336 ev_feed_signal_event (EV_AX_ signum);
340 struct ev_loop* EV_AX;
346 struct dynamic_loop: loop_ref
349 dynamic_loop (unsigned int flags = AUTO) EV_THROW (bad_loop)
350 : loop_ref (ev_loop_new (flags))
354 ~dynamic_loop () EV_THROW ()
356 ev_loop_destroy (EV_AX);
362 dynamic_loop (const dynamic_loop &);
364 dynamic_loop & operator= (const dynamic_loop &);
369 struct default_loop: loop_ref
372 default_loop (unsigned int flags = AUTO) EV_THROW (bad_loop)
374 : loop_ref (ev_default_loop (flags))
379 #if EV_CXX_EXCEPTIONS
382 ev_default_loop (flags);
383 #if EV_CXX_EXCEPTIONS
390 ~default_loop () EV_THROW ()
392 ev_default_destroy ();
400 default_loop (const default_loop &);
402 default_loop & operator= (const default_loop &);
406 inline loop_ref get_default_loop () EV_THROW ()
409 return ev_default_loop (0);
421 # define EV_PX loop_ref EV_A
422 # define EV_PX_ loop_ref EV_A_
428 template<class ev_watcher, class watcher>
429 struct base : ev_watcher
434 void set (EV_PX) EV_THROW ()
440 base (EV_PX) EV_THROW ()
448 void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) EV_THROW ()
451 ev_set_cb (static_cast<ev_watcher *>(this), cb);
455 template<class K, void (K::*method)(watcher &w, int)>
456 void set (K *object) EV_THROW ()
458 set_ (object, method_thunk<K, method>);
461 template<class K, void (K::*method)(watcher &w, int)>
462 static void method_thunk (EV_P_ ev_watcher *w, int revents)
464 K *obj = static_cast<K *>(w->data);
465 (obj->*method) (*static_cast<watcher *>(w), revents);
468 // const method callback
469 template<class K, void (K::*method)(watcher &w, int) const>
470 void set (const K *object) EV_THROW ()
472 set_ (object, const_method_thunk<K, method>);
475 template<class K, void (K::*method)(watcher &w, int) const>
476 static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
478 K *obj = static_cast<K *>(w->data);
479 (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
483 template<void (*function)(watcher &w, int)>
484 void set (void *data = 0) EV_THROW ()
486 set_ (data, function_thunk<function>);
489 template<void (*function)(watcher &w, int)>
490 static void function_thunk (EV_P_ ev_watcher *w, int revents)
492 function (*static_cast<watcher *>(w), revents);
496 template<class K, void (K::*method)()>
497 void set (K *object) EV_THROW ()
499 set_ (object, method_noargs_thunk<K, method>);
502 template<class K, void (K::*method)()>
503 static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
505 K *obj = static_cast<K *>(w->data);
509 void operator ()(int events = EV_UNDEF)
511 return ev_cb (static_cast<ev_watcher *>(this))
512 (static_cast<ev_watcher *>(this), events);
515 bool is_active () const EV_THROW ()
517 return ev_is_active (static_cast<const ev_watcher *>(this));
520 bool is_pending () const EV_THROW ()
522 return ev_is_pending (static_cast<const ev_watcher *>(this));
525 void feed_event (int revents) EV_THROW ()
527 ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
531 inline tstamp now () EV_THROW ()
536 inline void delay (tstamp interval) EV_THROW ()
541 inline int version_major () EV_THROW ()
543 return ev_version_major ();
546 inline int version_minor () EV_THROW ()
548 return ev_version_minor ();
551 inline unsigned int supported_backends () EV_THROW ()
553 return ev_supported_backends ();
556 inline unsigned int recommended_backends () EV_THROW ()
558 return ev_recommended_backends ();
561 inline unsigned int embeddable_backends () EV_THROW ()
563 return ev_embeddable_backends ();
566 inline void set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW ()
568 ev_set_allocator (cb);
571 inline void set_syserr_cb (void (*cb)(const char *msg)) EV_THROW ()
573 ev_set_syserr_cb (cb);
577 #define EV_CONSTRUCT(cppstem,cstem) \
578 (EV_PX = get_default_loop ()) EV_THROW () \
579 : base<ev_ ## cstem, cppstem> (EV_A) \
583 #define EV_CONSTRUCT(cppstem,cstem) \
589 /* using a template here would require quite a bit more lines,
590 * so a macro solution was chosen */
591 #define EV_BEGIN_WATCHER(cppstem,cstem) \
593 struct cppstem : base<ev_ ## cstem, cppstem> \
595 void start () EV_THROW () \
597 ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
600 void stop () EV_THROW () \
602 ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
605 cppstem EV_CONSTRUCT(cppstem,cstem) \
607 ~cppstem () EV_THROW () \
612 using base<ev_ ## cstem, cppstem>::set; \
616 cppstem (const cppstem &o); \
618 cppstem & operator =(const cppstem &o); \
622 #define EV_END_WATCHER(cppstem,cstem) \
625 EV_BEGIN_WATCHER (io, io)
626 void set (int fd, int events) EV_THROW ()
628 int active = is_active ();
630 ev_io_set (static_cast<ev_io *>(this), fd, events);
631 if (active) start ();
634 void set (int events) EV_THROW ()
636 int active = is_active ();
638 ev_io_set (static_cast<ev_io *>(this), fd, events);
639 if (active) start ();
642 void start (int fd, int events) EV_THROW ()
647 EV_END_WATCHER (io, io)
649 EV_BEGIN_WATCHER (timer, timer)
650 void set (ev_tstamp after, ev_tstamp repeat = 0.) EV_THROW ()
652 int active = is_active ();
654 ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
655 if (active) start ();
658 void start (ev_tstamp after, ev_tstamp repeat = 0.) EV_THROW ()
664 void again () EV_THROW ()
666 ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
668 EV_END_WATCHER (timer, timer)
670 #if EV_PERIODIC_ENABLE
671 EV_BEGIN_WATCHER (periodic, periodic)
672 void set (ev_tstamp at, ev_tstamp interval = 0.) EV_THROW ()
674 int active = is_active ();
676 ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
677 if (active) start ();
680 void start (ev_tstamp at, ev_tstamp interval = 0.) EV_THROW ()
686 void again () EV_THROW ()
688 ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
690 EV_END_WATCHER (periodic, periodic)
693 EV_BEGIN_WATCHER (sig, signal)
694 void set (int signum) EV_THROW ()
696 int active = is_active ();
698 ev_signal_set (static_cast<ev_signal *>(this), signum);
699 if (active) start ();
702 void start (int signum) EV_THROW ()
707 EV_END_WATCHER (sig, signal)
709 EV_BEGIN_WATCHER (child, child)
710 void set (int pid) EV_THROW ()
712 int active = is_active ();
714 ev_child_set (static_cast<ev_child *>(this), pid);
715 if (active) start ();
718 void start (int pid) EV_THROW ()
723 EV_END_WATCHER (child, child)
726 EV_BEGIN_WATCHER (stat, stat)
727 void set (const char *path, ev_tstamp interval = 0.) EV_THROW ()
729 int active = is_active ();
731 ev_stat_set (static_cast<ev_stat *>(this), path, interval);
732 if (active) start ();
735 void start (const char *path, ev_tstamp interval = 0.) EV_THROW ()
738 set (path, interval);
742 void update () EV_THROW ()
744 ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
746 EV_END_WATCHER (stat, stat)
749 EV_BEGIN_WATCHER (idle, idle)
750 void set () EV_THROW () { }
751 EV_END_WATCHER (idle, idle)
753 EV_BEGIN_WATCHER (prepare, prepare)
754 void set () EV_THROW () { }
755 EV_END_WATCHER (prepare, prepare)
757 EV_BEGIN_WATCHER (check, check)
758 void set () EV_THROW () { }
759 EV_END_WATCHER (check, check)
762 EV_BEGIN_WATCHER (embed, embed)
763 void start (struct ev_loop *embedded_loop) EV_THROW ()
766 ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
772 ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
774 EV_END_WATCHER (embed, embed)
778 EV_BEGIN_WATCHER (fork, fork)
779 void set () EV_THROW () { }
780 EV_END_WATCHER (fork, fork)
786 #undef EV_BEGIN_WATCHER
787 #undef EV_END_WATCHER