2 * libev native API header
4 * Copyright (c) 2007,2008,2009,2010 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.
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.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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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-
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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,
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25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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47 /*****************************************************************************/
50 # define EV_FEATURES 0x7f
53 #define EV_FEATURE_CODE ((EV_FEATURES) & 1)
54 #define EV_FEATURE_DATA ((EV_FEATURES) & 2)
55 #define EV_FEATURE_CONFIG ((EV_FEATURES) & 4)
56 #define EV_FEATURE_API ((EV_FEATURES) & 8)
57 #define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16)
58 #define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32)
59 #define EV_FEATURE_OS ((EV_FEATURES) & 64)
61 /* these priorities are inclusive, higher priorities will be invoked earlier */
63 # define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0)
66 # define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0)
69 #ifndef EV_MULTIPLICITY
70 # define EV_MULTIPLICITY EV_FEATURE_CONFIG
73 #ifndef EV_PERIODIC_ENABLE
74 # define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS
77 #ifndef EV_STAT_ENABLE
78 # define EV_STAT_ENABLE EV_FEATURE_WATCHERS
81 #ifndef EV_PREPARE_ENABLE
82 # define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS
85 #ifndef EV_CHECK_ENABLE
86 # define EV_CHECK_ENABLE EV_FEATURE_WATCHERS
89 #ifndef EV_IDLE_ENABLE
90 # define EV_IDLE_ENABLE EV_FEATURE_WATCHERS
93 #ifndef EV_FORK_ENABLE
94 # define EV_FORK_ENABLE EV_FEATURE_WATCHERS
97 #ifndef EV_SIGNAL_ENABLE
98 # define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS
101 #ifndef EV_CHILD_ENABLE
103 # define EV_CHILD_ENABLE 0
105 # define EV_CHILD_ENABLE EV_FEATURE_WATCHERS
109 #ifndef EV_ASYNC_ENABLE
110 # define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS
113 #ifndef EV_EMBED_ENABLE
114 # define EV_EMBED_ENABLE EV_FEATURE_WATCHERS
117 #ifndef EV_WALK_ENABLE
118 # define EV_WALK_ENABLE 0 /* not yet */
121 /*****************************************************************************/
123 #if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE
124 # undef EV_SIGNAL_ENABLE
125 # define EV_SIGNAL_ENABLE 1
128 /*****************************************************************************/
130 typedef double ev_tstamp;
134 # define EV_ATOMIC_T sig_atomic_t volatile
140 # include <sys/types.h>
142 # include <sys/stat.h>
145 /* support multiple event loops? */
148 # define EV_P struct ev_loop *loop
152 # define EV_DEFAULT_UC ev_default_loop_uc ()
153 # define EV_DEFAULT_UC_ EV_DEFAULT_UC,
154 # define EV_DEFAULT ev_default_loop (0)
155 # define EV_DEFAULT_ EV_DEFAULT,
163 # define EV_DEFAULT_UC
164 # define EV_DEFAULT_UC_
165 # undef EV_EMBED_ENABLE
168 #if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3
169 # define EV_INLINE static inline
171 # define EV_INLINE static
174 #ifndef EV_PROTOTYPES
175 # define EV_PROTOTYPES 1
178 /*****************************************************************************/
180 #define EV_VERSION_MAJOR 4
181 #define EV_VERSION_MINOR 0
183 /* eventmask, revents, events... */
184 #define EV_UNDEF -1 /* guaranteed to be invalid */
185 #define EV_NONE 0x00 /* no events */
186 #define EV_READ 0x01 /* ev_io detected read will not block */
187 #define EV_WRITE 0x02 /* ev_io detected write will not block */
188 #define EV__IOFDSET 0x80 /* internal use only */
189 #define EV_IO EV_READ /* alias for type-detection */
190 #define EV_TIMEOUT 0x00000100 /* timer timed out */
191 #define EV_TIMER EV_TIMEOUT /* alias for type-detection */
192 #define EV_PERIODIC 0x00000200 /* periodic timer timed out */
193 #define EV_SIGNAL 0x00000400 /* signal was received */
194 #define EV_CHILD 0x00000800 /* child/pid had status change */
195 #define EV_STAT 0x00001000 /* stat data changed */
196 #define EV_IDLE 0x00002000 /* event loop is idling */
197 #define EV_PREPARE 0x00004000 /* event loop about to poll */
198 #define EV_CHECK 0x00008000 /* event loop finished poll */
199 #define EV_EMBED 0x00010000 /* embedded event loop needs sweep */
200 #define EV_FORK 0x00020000 /* event loop resumed in child */
201 #define EV_ASYNC 0x00040000 /* async intra-loop signal */
202 #define EV_CUSTOM 0x01000000 /* for use by user code */
203 #define EV_ERROR 0x80000000 /* sent when an error occurs */
205 /* can be used to add custom fields to all watchers, while losing binary compatibility */
207 # define EV_COMMON void *data;
210 #ifndef EV_CB_DECLARE
211 # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);
214 # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents))
217 /* not official, do not use */
218 #define EV_CB(type,name) void name (EV_P_ struct ev_ ## type *w, int revents)
221 * struct member types:
222 * private: you may look at them, but not change them,
223 * and they might not mean anything to you.
224 * ro: can be read anytime, but only changed when the watcher isn't active.
225 * rw: can be read and modified anytime, even when the watcher is active.
227 * some internal details that might be helpful for debugging:
229 * active is either 0, which means the watcher is not active,
230 * or the array index of the watcher (periodics, timers)
231 * or the array index + 1 (most other watchers)
232 * or simply 1 for watchers that aren't in some array.
233 * pending is either 0, in which case the watcher isn't,
234 * or the array index + 1 in the pendings array.
237 #if EV_MINPRI == EV_MAXPRI
238 # define EV_DECL_PRIORITY
239 #elif !defined (EV_DECL_PRIORITY)
240 # define EV_DECL_PRIORITY int priority;
243 /* shared by all watchers */
244 #define EV_WATCHER(type) \
245 int active; /* private */ \
246 int pending; /* private */ \
247 EV_DECL_PRIORITY /* private */ \
249 EV_CB_DECLARE (type) /* private */
251 #define EV_WATCHER_LIST(type) \
253 struct ev_watcher_list *next; /* private */
255 #define EV_WATCHER_TIME(type) \
257 ev_tstamp at; /* private */
259 /* base class, nothing to see here unless you subclass */
260 typedef struct ev_watcher
262 EV_WATCHER (ev_watcher)
265 /* base class, nothing to see here unless you subclass */
266 typedef struct ev_watcher_list
268 EV_WATCHER_LIST (ev_watcher_list)
271 /* base class, nothing to see here unless you subclass */
272 typedef struct ev_watcher_time
274 EV_WATCHER_TIME (ev_watcher_time)
277 /* invoked when fd is either EV_READable or EV_WRITEable */
278 /* revent EV_READ, EV_WRITE */
281 EV_WATCHER_LIST (ev_io)
287 /* invoked after a specific time, repeatable (based on monotonic clock) */
288 /* revent EV_TIMEOUT */
289 typedef struct ev_timer
291 EV_WATCHER_TIME (ev_timer)
293 ev_tstamp repeat; /* rw */
296 /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
297 /* revent EV_PERIODIC */
298 typedef struct ev_periodic
300 EV_WATCHER_TIME (ev_periodic)
302 ev_tstamp offset; /* rw */
303 ev_tstamp interval; /* rw */
304 ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */
307 /* invoked when the given signal has been received */
308 /* revent EV_SIGNAL */
309 typedef struct ev_signal
311 EV_WATCHER_LIST (ev_signal)
316 /* invoked when sigchld is received and waitpid indicates the given pid */
317 /* revent EV_CHILD */
318 /* does not support priorities */
319 typedef struct ev_child
321 EV_WATCHER_LIST (ev_child)
323 int flags; /* private */
325 int rpid; /* rw, holds the received pid */
326 int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
330 /* st_nlink = 0 means missing file or other error */
332 typedef struct _stati64 ev_statdata;
334 typedef struct stat ev_statdata;
337 /* invoked each time the stat data changes for a given path */
339 typedef struct ev_stat
341 EV_WATCHER_LIST (ev_stat)
343 ev_timer timer; /* private */
344 ev_tstamp interval; /* ro */
345 const char *path; /* ro */
346 ev_statdata prev; /* ro */
347 ev_statdata attr; /* ro */
349 int wd; /* wd for inotify, fd for kqueue */
354 /* invoked when the nothing else needs to be done, keeps the process from blocking */
356 typedef struct ev_idle
362 /* invoked for each run of the mainloop, just before the blocking call */
363 /* you can still change events in any way you like */
364 /* revent EV_PREPARE */
365 typedef struct ev_prepare
367 EV_WATCHER (ev_prepare)
370 /* invoked for each run of the mainloop, just after the blocking call */
371 /* revent EV_CHECK */
372 typedef struct ev_check
374 EV_WATCHER (ev_check)
378 /* the callback gets invoked before check in the child process when a fork was detected */
379 typedef struct ev_fork
386 /* used to embed an event loop inside another */
387 /* the callback gets invoked when the event loop has handled events, and can be 0 */
388 typedef struct ev_embed
390 EV_WATCHER (ev_embed)
392 struct ev_loop *other; /* ro */
393 ev_io io; /* private */
394 ev_prepare prepare; /* private */
395 ev_check check; /* unused */
396 ev_timer timer; /* unused */
397 ev_periodic periodic; /* unused */
398 ev_idle idle; /* unused */
399 ev_fork fork; /* private */
404 /* invoked when somebody calls ev_async_send on the watcher */
405 /* revent EV_ASYNC */
406 typedef struct ev_async
408 EV_WATCHER (ev_async)
410 EV_ATOMIC_T sent; /* private */
413 # define ev_async_pending(w) (+(w)->sent)
416 /* the presence of this union forces similar struct layout */
420 struct ev_watcher_list wl;
423 struct ev_timer timer;
424 struct ev_periodic periodic;
425 struct ev_signal signal;
426 struct ev_child child;
433 struct ev_prepare prepare;
434 struct ev_check check;
439 struct ev_embed embed;
442 struct ev_async async;
446 /* bits for ev_default_loop and ev_loop_new */
448 #define EVFLAG_AUTO 0x00000000U /* not quite a mask */
450 #define EVFLAG_NOENV 0x01000000U /* do NOT consult environment */
451 #define EVFLAG_FORKCHECK 0x02000000U /* check for a fork in each iteration */
452 /* debugging/feature disable */
453 #define EVFLAG_NOINOTIFY 0x00100000U /* do not attempt to use inotify */
454 #define EVFLAG_NOSIGFD 0 /* compatibility to pre-3.9 */
455 #define EVFLAG_SIGNALFD 0x00200000U /* attempt to use signalfd */
456 /* method bits to be ored together */
457 #define EVBACKEND_SELECT 0x00000001U /* about anywhere */
458 #define EVBACKEND_POLL 0x00000002U /* !win */
459 #define EVBACKEND_EPOLL 0x00000004U /* linux */
460 #define EVBACKEND_KQUEUE 0x00000008U /* bsd */
461 #define EVBACKEND_DEVPOLL 0x00000010U /* solaris 8 */ /* NYI */
462 #define EVBACKEND_PORT 0x00000020U /* solaris 10 */
463 #define EVBACKEND_ALL 0x0000003FU
466 int ev_version_major (void);
467 int ev_version_minor (void);
469 unsigned int ev_supported_backends (void);
470 unsigned int ev_recommended_backends (void);
471 unsigned int ev_embeddable_backends (void);
473 ev_tstamp ev_time (void);
474 void ev_sleep (ev_tstamp delay); /* sleep for a while */
476 /* Sets the allocation function to use, works like realloc.
477 * It is used to allocate and free memory.
478 * If it returns zero when memory needs to be allocated, the library might abort
479 * or take some potentially destructive action.
480 * The default is your system realloc function.
482 void ev_set_allocator (void *(*cb)(void *ptr, long size));
484 /* set the callback function to call on a
485 * retryable syscall error
486 * (such as failed select, poll, epoll_wait)
488 void ev_set_syserr_cb (void (*cb)(const char *msg));
491 EV_INLINE struct ev_loop *
492 ev_default_loop_uc (void)
494 extern struct ev_loop *ev_default_loop_ptr;
496 return ev_default_loop_ptr;
499 /* the default loop is the only one that handles signals and child watchers */
500 /* you can call this as often as you like */
501 EV_INLINE struct ev_loop *
502 ev_default_loop (unsigned int flags)
504 struct ev_loop *loop = ev_default_loop_uc ();
508 extern struct ev_loop *ev_default_loop_init (unsigned int flags);
510 loop = ev_default_loop_init (flags);
516 /* create and destroy alternative loops that don't handle signals */
517 struct ev_loop *ev_loop_new (unsigned int flags);
518 void ev_loop_destroy (EV_P);
519 void ev_loop_fork (EV_P);
521 ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
525 int ev_default_loop (unsigned int flags); /* returns true when successful */
530 extern ev_tstamp ev_rt_now;
534 #endif /* multiplicity */
537 ev_is_default_loop (EV_P)
540 extern struct ev_loop *ev_default_loop_ptr;
542 return !!(EV_A == ev_default_loop_ptr);
548 void ev_default_destroy (void); /* destroy the default loop */
549 /* this needs to be called after fork, to duplicate the default loop */
550 /* if you create alternative loops you have to call ev_loop_fork on them */
551 /* you can call it in either the parent or the child */
552 /* you can actually call it at any time, anywhere :) */
553 void ev_default_fork (void);
555 unsigned int ev_backend (EV_P); /* backend in use by loop */
557 void ev_now_update (EV_P); /* update event loop time */
560 /* walk (almost) all watchers in the loop of a given type, invoking the */
561 /* callback on every such watcher. The callback might stop the watcher, */
562 /* but do nothing else with the loop */
563 void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w));
566 #endif /* prototypes */
568 #define EVLOOP_NONBLOCK 1 /* do not block/wait */
569 #define EVLOOP_ONESHOT 2 /* block *once* only */
570 #define EVUNLOOP_CANCEL 0 /* undo unloop */
571 #define EVUNLOOP_ONE 1 /* unloop once */
572 #define EVUNLOOP_ALL 2 /* unloop all loops */
575 void ev_loop (EV_P_ int flags);
576 void ev_unloop (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
579 * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
580 * keeps one reference. if you have a long-running watcher you never unregister that
581 * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
584 void ev_unref (EV_P);
587 * convenience function, wait for a single event, without registering an event watcher
588 * if timeout is < 0, do wait indefinitely
590 void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
593 unsigned int ev_loop_count (EV_P); /* number of loop iterations */
594 unsigned int ev_loop_depth (EV_P); /* #ev_loop enters - #ev_loop leaves */
595 void ev_loop_verify (EV_P); /* abort if loop data corrupted */
597 void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
598 void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
600 /* advanced stuff for threading etc. support, see docs */
601 void ev_set_userdata (EV_P_ void *data);
602 void *ev_userdata (EV_P);
603 void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P));
604 void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P));
606 unsigned int ev_pending_count (EV_P); /* number of pending events, if any */
607 void ev_invoke_pending (EV_P); /* invoke all pending watchers */
610 * stop/start the timer handling.
612 void ev_suspend (EV_P);
613 void ev_resume (EV_P);
618 /* these may evaluate ev multiple times, and the other arguments at most once */
619 /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
620 #define ev_init(ev,cb_) do { \
621 ((ev_watcher *)(void *)(ev))->active = \
622 ((ev_watcher *)(void *)(ev))->pending = 0; \
623 ev_set_priority ((ev), 0); \
624 ev_set_cb ((ev), cb_); \
627 #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0)
628 #define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0)
629 #define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0)
630 #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
631 #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0)
632 #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0)
633 #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */
634 #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */
635 #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */
636 #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0)
637 #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */
638 #define ev_async_set(ev) do { (ev)->sent = 0; } while (0)
640 #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
641 #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
642 #define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0)
643 #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
644 #define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0)
645 #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0)
646 #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
647 #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
648 #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
649 #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0)
650 #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0)
651 #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0)
653 #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
654 #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
656 #define ev_cb(ev) (ev)->cb /* rw */
658 #if EV_MINPRI == EV_MAXPRI
659 # define ev_priority(ev) ((ev), EV_MINPRI)
660 # define ev_set_priority(ev,pri) ((ev), (pri))
662 # define ev_priority(ev) (+(((ev_watcher *)(void *)(ev))->priority))
663 # define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri)
666 #define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at)
669 # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)
672 /* stopping (enabling, adding) a watcher does nothing if it is already running */
673 /* stopping (disabling, deleting) a watcher does nothing unless its already running */
676 /* feeds an event into a watcher as if the event actually occured */
677 /* accepts any ev_watcher type */
678 void ev_feed_event (EV_P_ void *w, int revents);
679 void ev_feed_fd_event (EV_P_ int fd, int revents);
681 void ev_feed_signal_event (EV_P_ int signum);
683 void ev_invoke (EV_P_ void *w, int revents);
684 int ev_clear_pending (EV_P_ void *w);
686 void ev_io_start (EV_P_ ev_io *w);
687 void ev_io_stop (EV_P_ ev_io *w);
689 void ev_timer_start (EV_P_ ev_timer *w);
690 void ev_timer_stop (EV_P_ ev_timer *w);
691 /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
692 void ev_timer_again (EV_P_ ev_timer *w);
693 /* return remaining time */
694 ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w);
696 #if EV_PERIODIC_ENABLE
697 void ev_periodic_start (EV_P_ ev_periodic *w);
698 void ev_periodic_stop (EV_P_ ev_periodic *w);
699 void ev_periodic_again (EV_P_ ev_periodic *w);
702 /* only supported in the default loop */
704 void ev_signal_start (EV_P_ ev_signal *w);
705 void ev_signal_stop (EV_P_ ev_signal *w);
708 /* only supported in the default loop */
710 void ev_child_start (EV_P_ ev_child *w);
711 void ev_child_stop (EV_P_ ev_child *w);
715 void ev_stat_start (EV_P_ ev_stat *w);
716 void ev_stat_stop (EV_P_ ev_stat *w);
717 void ev_stat_stat (EV_P_ ev_stat *w);
721 void ev_idle_start (EV_P_ ev_idle *w);
722 void ev_idle_stop (EV_P_ ev_idle *w);
725 #if EV_PREPARE_ENABLE
726 void ev_prepare_start (EV_P_ ev_prepare *w);
727 void ev_prepare_stop (EV_P_ ev_prepare *w);
731 void ev_check_start (EV_P_ ev_check *w);
732 void ev_check_stop (EV_P_ ev_check *w);
736 void ev_fork_start (EV_P_ ev_fork *w);
737 void ev_fork_stop (EV_P_ ev_fork *w);
741 /* only supported when loop to be embedded is in fact embeddable */
742 void ev_embed_start (EV_P_ ev_embed *w);
743 void ev_embed_stop (EV_P_ ev_embed *w);
744 void ev_embed_sweep (EV_P_ ev_embed *w);
748 void ev_async_start (EV_P_ ev_async *w);
749 void ev_async_stop (EV_P_ ev_async *w);
750 void ev_async_send (EV_P_ ev_async *w);