2 * libev event processing core, watcher management
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer in the documentation and/or other materials provided
17 * with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 # if HAVE_CLOCK_GETTIME
44 # ifndef EV_USE_MONOTONIC
45 # define EV_USE_MONOTONIC 1
47 # ifndef EV_USE_REALTIME
48 # define EV_USE_REALTIME 1
51 # ifndef EV_USE_MONOTONIC
52 # define EV_USE_MONOTONIC 0
54 # ifndef EV_USE_REALTIME
55 # define EV_USE_REALTIME 0
59 # ifndef EV_USE_NANOSLEEP
61 # define EV_USE_NANOSLEEP 1
63 # define EV_USE_NANOSLEEP 0
67 # ifndef EV_USE_SELECT
68 # if HAVE_SELECT && HAVE_SYS_SELECT_H
69 # define EV_USE_SELECT 1
71 # define EV_USE_SELECT 0
76 # if HAVE_POLL && HAVE_POLL_H
77 # define EV_USE_POLL 1
79 # define EV_USE_POLL 0
84 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
85 # define EV_USE_EPOLL 1
87 # define EV_USE_EPOLL 0
91 # ifndef EV_USE_KQUEUE
92 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
93 # define EV_USE_KQUEUE 1
95 # define EV_USE_KQUEUE 0
100 # if HAVE_PORT_H && HAVE_PORT_CREATE
101 # define EV_USE_PORT 1
103 # define EV_USE_PORT 0
107 # ifndef EV_USE_INOTIFY
108 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
109 # define EV_USE_INOTIFY 1
111 # define EV_USE_INOTIFY 0
126 #include <sys/types.h>
138 # include <sys/time.h>
139 # include <sys/wait.h>
142 # define WIN32_LEAN_AND_MEAN
143 # include <windows.h>
144 # ifndef EV_SELECT_IS_WINSOCKET
145 # define EV_SELECT_IS_WINSOCKET 1
151 #ifndef EV_USE_MONOTONIC
152 # define EV_USE_MONOTONIC 0
155 #ifndef EV_USE_REALTIME
156 # define EV_USE_REALTIME 0
159 #ifndef EV_USE_NANOSLEEP
160 # define EV_USE_NANOSLEEP 0
163 #ifndef EV_USE_SELECT
164 # define EV_USE_SELECT 1
169 # define EV_USE_POLL 0
171 # define EV_USE_POLL 1
176 # define EV_USE_EPOLL 0
179 #ifndef EV_USE_KQUEUE
180 # define EV_USE_KQUEUE 0
184 # define EV_USE_PORT 0
187 #ifndef EV_USE_INOTIFY
188 # define EV_USE_INOTIFY 0
191 #ifndef EV_PID_HASHSIZE
193 # define EV_PID_HASHSIZE 1
195 # define EV_PID_HASHSIZE 16
199 #ifndef EV_INOTIFY_HASHSIZE
201 # define EV_INOTIFY_HASHSIZE 1
203 # define EV_INOTIFY_HASHSIZE 16
209 #ifndef CLOCK_MONOTONIC
210 # undef EV_USE_MONOTONIC
211 # define EV_USE_MONOTONIC 0
214 #ifndef CLOCK_REALTIME
215 # undef EV_USE_REALTIME
216 # define EV_USE_REALTIME 0
220 # undef EV_USE_INOTIFY
221 # define EV_USE_INOTIFY 0
224 #if !EV_USE_NANOSLEEP
226 # include <sys/select.h>
231 # include <sys/inotify.h>
234 #if EV_SELECT_IS_WINSOCKET
235 # include <winsock.h>
241 * This is used to avoid floating point rounding problems.
242 * It is added to ev_rt_now when scheduling periodics
243 * to ensure progress, time-wise, even when rounding
244 * errors are against us.
245 * This value is good at least till the year 4000.
246 * Better solutions welcome.
248 #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
250 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
251 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
252 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
255 # define expect(expr,value) __builtin_expect ((expr),(value))
256 # define noinline __attribute__ ((noinline))
258 # define expect(expr,value) (expr)
260 # if __STDC_VERSION__ < 199901L
265 #define expect_false(expr) expect ((expr) != 0, 0)
266 #define expect_true(expr) expect ((expr) != 0, 1)
267 #define inline_size static inline
270 # define inline_speed static noinline
272 # define inline_speed static inline
275 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
276 #define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
278 #define EMPTY /* required for microsofts broken pseudo-c compiler */
279 #define EMPTY2(a,b) /* used to suppress some warnings */
281 typedef ev_watcher *W;
282 typedef ev_watcher_list *WL;
283 typedef ev_watcher_time *WT;
285 static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
288 # include "ev_win32.c"
291 /*****************************************************************************/
293 static void (*syserr_cb)(const char *msg);
296 ev_set_syserr_cb (void (*cb)(const char *msg))
302 syserr (const char *msg)
305 msg = "(libev) system error";
316 static void *(*alloc)(void *ptr, long size);
319 ev_set_allocator (void *(*cb)(void *ptr, long size))
325 ev_realloc (void *ptr, long size)
327 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
331 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
338 #define ev_malloc(size) ev_realloc (0, (size))
339 #define ev_free(ptr) ev_realloc ((ptr), 0)
341 /*****************************************************************************/
346 unsigned char events;
348 #if EV_SELECT_IS_WINSOCKET
371 #define ev_rt_now ((loop)->ev_rt_now)
372 #define VAR(name,decl) decl;
378 static struct ev_loop default_loop_struct;
379 struct ev_loop *ev_default_loop_ptr;
384 #define VAR(name,decl) static decl;
388 static int ev_default_loop_ptr;
392 /*****************************************************************************/
399 clock_gettime (CLOCK_REALTIME, &ts);
400 return ts.tv_sec + ts.tv_nsec * 1e-9;
403 gettimeofday (&tv, 0);
404 return tv.tv_sec + tv.tv_usec * 1e-6;
408 ev_tstamp inline_size
412 if (expect_true (have_monotonic))
415 clock_gettime (CLOCK_MONOTONIC, &ts);
416 return ts.tv_sec + ts.tv_nsec * 1e-9;
432 ev_sleep (ev_tstamp delay)
439 ts.tv_sec = (time_t)delay;
440 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
443 #elif defined(_WIN32)
448 tv.tv_sec = (time_t)delay;
449 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
451 select (0, 0, 0, 0, &tv);
456 /*****************************************************************************/
459 array_nextsize (int elem, int cur, int cnt)
467 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
468 if (elem * ncur > 4096)
471 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
472 ncur = ncur - sizeof (void *) * 4;
479 static noinline void *
480 array_realloc (int elem, void *base, int *cur, int cnt)
482 *cur = array_nextsize (elem, *cur, cnt);
483 return ev_realloc (base, elem * *cur);
486 #define array_needsize(type,base,cur,cnt,init) \
487 if (expect_false ((cnt) > (cur))) \
490 (base) = (type *)array_realloc \
491 (sizeof (type), (base), &(cur), (cnt)); \
492 init ((base) + (ocur_), (cur) - ocur_); \
496 #define array_slim(type,stem) \
497 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
499 stem ## max = array_roundsize (stem ## cnt >> 1); \
500 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
501 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
505 #define array_free(stem, idx) \
506 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
508 /*****************************************************************************/
511 ev_feed_event (EV_P_ void *w, int revents)
514 int pri = ABSPRI (w_);
516 if (expect_false (w_->pending))
517 pendings [pri][w_->pending - 1].events |= revents;
520 w_->pending = ++pendingcnt [pri];
521 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
522 pendings [pri][w_->pending - 1].w = w_;
523 pendings [pri][w_->pending - 1].events = revents;
528 queue_events (EV_P_ W *events, int eventcnt, int type)
532 for (i = 0; i < eventcnt; ++i)
533 ev_feed_event (EV_A_ events [i], type);
536 /*****************************************************************************/
539 anfds_init (ANFD *base, int count)
544 base->events = EV_NONE;
552 fd_event (EV_P_ int fd, int revents)
554 ANFD *anfd = anfds + fd;
557 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
559 int ev = w->events & revents;
562 ev_feed_event (EV_A_ (W)w, ev);
567 ev_feed_fd_event (EV_P_ int fd, int revents)
569 if (fd >= 0 && fd < anfdmax)
570 fd_event (EV_A_ fd, revents);
578 for (i = 0; i < fdchangecnt; ++i)
580 int fd = fdchanges [i];
581 ANFD *anfd = anfds + fd;
584 unsigned char events = 0;
586 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
587 events |= (unsigned char)w->events;
589 #if EV_SELECT_IS_WINSOCKET
593 anfd->handle = _get_osfhandle (fd);
594 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
599 unsigned char o_events = anfd->events;
600 unsigned char o_reify = anfd->reify;
603 anfd->events = events;
605 if (o_events != events || o_reify & EV_IOFDSET)
606 backend_modify (EV_A_ fd, o_events, events);
614 fd_change (EV_P_ int fd, int flags)
616 unsigned char reify = anfds [fd].reify;
617 anfds [fd].reify |= flags;
619 if (expect_true (!reify))
622 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
623 fdchanges [fdchangecnt - 1] = fd;
628 fd_kill (EV_P_ int fd)
632 while ((w = (ev_io *)anfds [fd].head))
634 ev_io_stop (EV_A_ w);
635 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
643 return _get_osfhandle (fd) != -1;
645 return fcntl (fd, F_GETFD) != -1;
649 /* called on EBADF to verify fds */
655 for (fd = 0; fd < anfdmax; ++fd)
656 if (anfds [fd].events)
657 if (!fd_valid (fd) == -1 && errno == EBADF)
661 /* called on ENOMEM in select/poll to kill some fds and retry */
667 for (fd = anfdmax; fd--; )
668 if (anfds [fd].events)
675 /* usually called after fork if backend needs to re-arm all fds from scratch */
681 for (fd = 0; fd < anfdmax; ++fd)
682 if (anfds [fd].events)
684 anfds [fd].events = 0;
685 fd_change (EV_A_ fd, EV_IOFDSET | 1);
689 /*****************************************************************************/
692 upheap (WT *heap, int k)
698 int p = (k - 1) >> 1;
700 if (heap [p]->at <= w->at)
704 ((W)heap [k])->active = k + 1;
709 ((W)heap [k])->active = k + 1;
713 downheap (WT *heap, int N, int k)
719 int c = (k << 1) + 1;
724 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
727 if (w->at <= heap [c]->at)
731 ((W)heap [k])->active = k + 1;
737 ((W)heap [k])->active = k + 1;
741 adjustheap (WT *heap, int N, int k)
744 downheap (heap, N, k);
747 /*****************************************************************************/
752 sig_atomic_t volatile gotsig;
755 static ANSIG *signals;
756 static int signalmax;
758 static int sigpipe [2];
759 static sig_atomic_t volatile gotsig;
763 signals_init (ANSIG *base, int count)
775 sighandler (int signum)
778 signal (signum, sighandler);
781 signals [signum - 1].gotsig = 1;
785 int old_errno = errno;
787 write (sigpipe [1], &signum, 1);
793 ev_feed_signal_event (EV_P_ int signum)
798 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
803 if (signum < 0 || signum >= signalmax)
806 signals [signum].gotsig = 0;
808 for (w = signals [signum].head; w; w = w->next)
809 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
813 sigcb (EV_P_ ev_io *iow, int revents)
817 read (sigpipe [0], &revents, 1);
820 for (signum = signalmax; signum--; )
821 if (signals [signum].gotsig)
822 ev_feed_signal_event (EV_A_ signum + 1);
830 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
832 fcntl (fd, F_SETFD, FD_CLOEXEC);
833 fcntl (fd, F_SETFL, O_NONBLOCK);
840 fd_intern (sigpipe [0]);
841 fd_intern (sigpipe [1]);
843 ev_io_set (&sigev, sigpipe [0], EV_READ);
844 ev_io_start (EV_A_ &sigev);
845 ev_unref (EV_A); /* child watcher should not keep loop alive */
848 /*****************************************************************************/
850 static WL childs [EV_PID_HASHSIZE];
854 static ev_signal childev;
857 child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
861 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
862 if (w->pid == pid || !w->pid)
864 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
867 ev_feed_event (EV_A_ (W)w, EV_CHILD);
872 # define WCONTINUED 0
876 childcb (EV_P_ ev_signal *sw, int revents)
880 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
881 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
884 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
887 /* make sure we are called again until all childs have been reaped */
888 /* we need to do it this way so that the callback gets called before we continue */
889 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
891 child_reap (EV_A_ sw, pid, pid, status);
892 if (EV_PID_HASHSIZE > 1)
893 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
898 /*****************************************************************************/
901 # include "ev_port.c"
904 # include "ev_kqueue.c"
907 # include "ev_epoll.c"
910 # include "ev_poll.c"
913 # include "ev_select.c"
917 ev_version_major (void)
919 return EV_VERSION_MAJOR;
923 ev_version_minor (void)
925 return EV_VERSION_MINOR;
928 /* return true if we are running with elevated privileges and should ignore env variables */
935 return getuid () != geteuid ()
936 || getgid () != getegid ();
941 ev_supported_backends (void)
943 unsigned int flags = 0;
945 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
946 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
947 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
948 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
949 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
955 ev_recommended_backends (void)
957 unsigned int flags = ev_supported_backends ();
960 /* kqueue is borked on everything but netbsd apparently */
961 /* it usually doesn't work correctly on anything but sockets and pipes */
962 flags &= ~EVBACKEND_KQUEUE;
965 // flags &= ~EVBACKEND_KQUEUE; for documentation
966 flags &= ~EVBACKEND_POLL;
973 ev_embeddable_backends (void)
975 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
976 return EVBACKEND_KQUEUE
993 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
995 io_blocktime = interval;
999 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1001 timeout_blocktime = interval;
1004 static void noinline
1005 loop_init (EV_P_ unsigned int flags)
1009 #if EV_USE_MONOTONIC
1012 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1017 ev_rt_now = ev_time ();
1018 mn_now = get_clock ();
1020 rtmn_diff = ev_rt_now - mn_now;
1023 timeout_blocktime = 0.;
1025 /* pid check not overridable via env */
1027 if (flags & EVFLAG_FORKCHECK)
1031 if (!(flags & EVFLAG_NOENV)
1032 && !enable_secure ()
1033 && getenv ("LIBEV_FLAGS"))
1034 flags = atoi (getenv ("LIBEV_FLAGS"));
1036 if (!(flags & 0x0000ffffUL))
1037 flags |= ev_recommended_backends ();
1046 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1049 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1052 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1055 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1058 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1061 ev_init (&sigev, sigcb);
1062 ev_set_priority (&sigev, EV_MAXPRI);
1066 static void noinline
1076 if (backend_fd >= 0)
1080 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1083 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1086 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1089 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1092 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1095 for (i = NUMPRI; i--; )
1097 array_free (pending, [i]);
1099 array_free (idle, [i]);
1103 ev_free (anfds); anfdmax = 0;
1105 /* have to use the microsoft-never-gets-it-right macro */
1106 array_free (fdchange, EMPTY);
1107 array_free (timer, EMPTY);
1108 #if EV_PERIODIC_ENABLE
1109 array_free (periodic, EMPTY);
1112 array_free (fork, EMPTY);
1114 array_free (prepare, EMPTY);
1115 array_free (check, EMPTY);
1120 void inline_size infy_fork (EV_P);
1126 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1129 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1132 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1138 if (ev_is_active (&sigev))
1143 ev_io_stop (EV_A_ &sigev);
1144 close (sigpipe [0]);
1145 close (sigpipe [1]);
1147 while (pipe (sigpipe))
1148 syserr ("(libev) error creating pipe");
1158 ev_loop_new (unsigned int flags)
1160 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1162 memset (loop, 0, sizeof (struct ev_loop));
1164 loop_init (EV_A_ flags);
1166 if (ev_backend (EV_A))
1173 ev_loop_destroy (EV_P)
1175 loop_destroy (EV_A);
1189 ev_default_loop_init (unsigned int flags)
1192 ev_default_loop (unsigned int flags)
1195 if (sigpipe [0] == sigpipe [1])
1199 if (!ev_default_loop_ptr)
1202 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1204 ev_default_loop_ptr = 1;
1207 loop_init (EV_A_ flags);
1209 if (ev_backend (EV_A))
1214 ev_signal_init (&childev, childcb, SIGCHLD);
1215 ev_set_priority (&childev, EV_MAXPRI);
1216 ev_signal_start (EV_A_ &childev);
1217 ev_unref (EV_A); /* child watcher should not keep loop alive */
1221 ev_default_loop_ptr = 0;
1224 return ev_default_loop_ptr;
1228 ev_default_destroy (void)
1231 struct ev_loop *loop = ev_default_loop_ptr;
1235 ev_ref (EV_A); /* child watcher */
1236 ev_signal_stop (EV_A_ &childev);
1239 ev_ref (EV_A); /* signal watcher */
1240 ev_io_stop (EV_A_ &sigev);
1242 close (sigpipe [0]); sigpipe [0] = 0;
1243 close (sigpipe [1]); sigpipe [1] = 0;
1245 loop_destroy (EV_A);
1249 ev_default_fork (void)
1252 struct ev_loop *loop = ev_default_loop_ptr;
1259 /*****************************************************************************/
1262 ev_invoke (EV_P_ void *w, int revents)
1264 EV_CB_INVOKE ((W)w, revents);
1272 for (pri = NUMPRI; pri--; )
1273 while (pendingcnt [pri])
1275 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1277 if (expect_true (p->w))
1279 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1282 EV_CB_INVOKE (p->w, p->events);
1290 while (timercnt && ((WT)timers [0])->at <= mn_now)
1292 ev_timer *w = (ev_timer *)timers [0];
1294 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1296 /* first reschedule or stop timer */
1299 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1301 ((WT)w)->at += w->repeat;
1302 if (((WT)w)->at < mn_now)
1303 ((WT)w)->at = mn_now;
1305 downheap (timers, timercnt, 0);
1308 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1310 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1314 #if EV_PERIODIC_ENABLE
1316 periodics_reify (EV_P)
1318 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1320 ev_periodic *w = (ev_periodic *)periodics [0];
1322 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1324 /* first reschedule or stop timer */
1325 if (w->reschedule_cb)
1327 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1328 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1329 downheap (periodics, periodiccnt, 0);
1331 else if (w->interval)
1333 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1334 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1335 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1336 downheap (periodics, periodiccnt, 0);
1339 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1341 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1345 static void noinline
1346 periodics_reschedule (EV_P)
1350 /* adjust periodics after time jump */
1351 for (i = 0; i < periodiccnt; ++i)
1353 ev_periodic *w = (ev_periodic *)periodics [i];
1355 if (w->reschedule_cb)
1356 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1357 else if (w->interval)
1358 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1361 /* now rebuild the heap */
1362 for (i = periodiccnt >> 1; i--; )
1363 downheap (periodics, periodiccnt, i);
1371 if (expect_false (idleall))
1375 for (pri = NUMPRI; pri--; )
1377 if (pendingcnt [pri])
1382 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1391 time_update (EV_P_ ev_tstamp max_block)
1395 #if EV_USE_MONOTONIC
1396 if (expect_true (have_monotonic))
1398 ev_tstamp odiff = rtmn_diff;
1400 mn_now = get_clock ();
1402 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1403 /* interpolate in the meantime */
1404 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1406 ev_rt_now = rtmn_diff + mn_now;
1411 ev_rt_now = ev_time ();
1413 /* loop a few times, before making important decisions.
1414 * on the choice of "4": one iteration isn't enough,
1415 * in case we get preempted during the calls to
1416 * ev_time and get_clock. a second call is almost guaranteed
1417 * to succeed in that case, though. and looping a few more times
1418 * doesn't hurt either as we only do this on time-jumps or
1419 * in the unlikely event of having been preempted here.
1423 rtmn_diff = ev_rt_now - mn_now;
1425 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1426 return; /* all is well */
1428 ev_rt_now = ev_time ();
1429 mn_now = get_clock ();
1433 # if EV_PERIODIC_ENABLE
1434 periodics_reschedule (EV_A);
1436 /* no timer adjustment, as the monotonic clock doesn't jump */
1437 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1442 ev_rt_now = ev_time ();
1444 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1446 #if EV_PERIODIC_ENABLE
1447 periodics_reschedule (EV_A);
1449 /* adjust timers. this is easy, as the offset is the same for all of them */
1450 for (i = 0; i < timercnt; ++i)
1451 ((WT)timers [i])->at += ev_rt_now - mn_now;
1470 static int loop_done;
1473 ev_loop (EV_P_ int flags)
1475 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1479 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1484 if (expect_false (curpid)) /* penalise the forking check even more */
1485 if (expect_false (getpid () != curpid))
1493 /* we might have forked, so queue fork handlers */
1494 if (expect_false (postfork))
1497 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1498 call_pending (EV_A);
1502 /* queue prepare watchers (and execute them) */
1503 if (expect_false (preparecnt))
1505 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1506 call_pending (EV_A);
1509 if (expect_false (!activecnt))
1512 /* we might have forked, so reify kernel state if necessary */
1513 if (expect_false (postfork))
1516 /* update fd-related kernel structures */
1519 /* calculate blocking time */
1521 ev_tstamp waittime = 0.;
1522 ev_tstamp sleeptime = 0.;
1524 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1526 /* update time to cancel out callback processing overhead */
1527 time_update (EV_A_ 1e100);
1529 waittime = MAX_BLOCKTIME;
1533 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1534 if (waittime > to) waittime = to;
1537 #if EV_PERIODIC_ENABLE
1540 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1541 if (waittime > to) waittime = to;
1545 if (expect_false (waittime < timeout_blocktime))
1546 waittime = timeout_blocktime;
1548 sleeptime = waittime - backend_fudge;
1550 if (expect_true (sleeptime > io_blocktime))
1551 sleeptime = io_blocktime;
1555 ev_sleep (sleeptime);
1556 waittime -= sleeptime;
1561 backend_poll (EV_A_ waittime);
1563 /* update ev_rt_now, do magic */
1564 time_update (EV_A_ waittime + sleeptime);
1567 /* queue pending timers and reschedule them */
1568 timers_reify (EV_A); /* relative timers called last */
1569 #if EV_PERIODIC_ENABLE
1570 periodics_reify (EV_A); /* absolute timers called first */
1574 /* queue idle watchers unless other events are pending */
1578 /* queue check watchers, to be executed first */
1579 if (expect_false (checkcnt))
1580 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1582 call_pending (EV_A);
1585 while (expect_true (activecnt && !loop_done));
1587 if (loop_done == EVUNLOOP_ONE)
1588 loop_done = EVUNLOOP_CANCEL;
1592 ev_unloop (EV_P_ int how)
1597 /*****************************************************************************/
1600 wlist_add (WL *head, WL elem)
1607 wlist_del (WL *head, WL elem)
1617 head = &(*head)->next;
1622 clear_pending (EV_P_ W w)
1626 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1632 ev_clear_pending (EV_P_ void *w)
1635 int pending = w_->pending;
1637 if (expect_true (pending))
1639 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1649 pri_adjust (EV_P_ W w)
1651 int pri = w->priority;
1652 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1653 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1658 ev_start (EV_P_ W w, int active)
1660 pri_adjust (EV_A_ w);
1672 /*****************************************************************************/
1675 ev_io_start (EV_P_ ev_io *w)
1679 if (expect_false (ev_is_active (w)))
1682 assert (("ev_io_start called with negative fd", fd >= 0));
1684 ev_start (EV_A_ (W)w, 1);
1685 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1686 wlist_add (&anfds[fd].head, (WL)w);
1688 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1689 w->events &= ~EV_IOFDSET;
1693 ev_io_stop (EV_P_ ev_io *w)
1695 clear_pending (EV_A_ (W)w);
1696 if (expect_false (!ev_is_active (w)))
1699 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1701 wlist_del (&anfds[w->fd].head, (WL)w);
1702 ev_stop (EV_A_ (W)w);
1704 fd_change (EV_A_ w->fd, 1);
1708 ev_timer_start (EV_P_ ev_timer *w)
1710 if (expect_false (ev_is_active (w)))
1713 ((WT)w)->at += mn_now;
1715 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1717 ev_start (EV_A_ (W)w, ++timercnt);
1718 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1719 timers [timercnt - 1] = (WT)w;
1720 upheap (timers, timercnt - 1);
1722 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1726 ev_timer_stop (EV_P_ ev_timer *w)
1728 clear_pending (EV_A_ (W)w);
1729 if (expect_false (!ev_is_active (w)))
1732 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1735 int active = ((W)w)->active;
1737 if (expect_true (--active < --timercnt))
1739 timers [active] = timers [timercnt];
1740 adjustheap (timers, timercnt, active);
1744 ((WT)w)->at -= mn_now;
1746 ev_stop (EV_A_ (W)w);
1750 ev_timer_again (EV_P_ ev_timer *w)
1752 if (ev_is_active (w))
1756 ((WT)w)->at = mn_now + w->repeat;
1757 adjustheap (timers, timercnt, ((W)w)->active - 1);
1760 ev_timer_stop (EV_A_ w);
1765 ev_timer_start (EV_A_ w);
1769 #if EV_PERIODIC_ENABLE
1771 ev_periodic_start (EV_P_ ev_periodic *w)
1773 if (expect_false (ev_is_active (w)))
1776 if (w->reschedule_cb)
1777 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1778 else if (w->interval)
1780 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1781 /* this formula differs from the one in periodic_reify because we do not always round up */
1782 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1785 ((WT)w)->at = w->offset;
1787 ev_start (EV_A_ (W)w, ++periodiccnt);
1788 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1789 periodics [periodiccnt - 1] = (WT)w;
1790 upheap (periodics, periodiccnt - 1);
1792 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1796 ev_periodic_stop (EV_P_ ev_periodic *w)
1798 clear_pending (EV_A_ (W)w);
1799 if (expect_false (!ev_is_active (w)))
1802 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1805 int active = ((W)w)->active;
1807 if (expect_true (--active < --periodiccnt))
1809 periodics [active] = periodics [periodiccnt];
1810 adjustheap (periodics, periodiccnt, active);
1814 ev_stop (EV_A_ (W)w);
1818 ev_periodic_again (EV_P_ ev_periodic *w)
1820 /* TODO: use adjustheap and recalculation */
1821 ev_periodic_stop (EV_A_ w);
1822 ev_periodic_start (EV_A_ w);
1827 # define SA_RESTART 0
1831 ev_signal_start (EV_P_ ev_signal *w)
1834 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1836 if (expect_false (ev_is_active (w)))
1839 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1843 sigset_t full, prev;
1845 sigprocmask (SIG_SETMASK, &full, &prev);
1848 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1851 sigprocmask (SIG_SETMASK, &prev, 0);
1855 ev_start (EV_A_ (W)w, 1);
1856 wlist_add (&signals [w->signum - 1].head, (WL)w);
1861 signal (w->signum, sighandler);
1863 struct sigaction sa;
1864 sa.sa_handler = sighandler;
1865 sigfillset (&sa.sa_mask);
1866 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1867 sigaction (w->signum, &sa, 0);
1873 ev_signal_stop (EV_P_ ev_signal *w)
1875 clear_pending (EV_A_ (W)w);
1876 if (expect_false (!ev_is_active (w)))
1879 wlist_del (&signals [w->signum - 1].head, (WL)w);
1880 ev_stop (EV_A_ (W)w);
1882 if (!signals [w->signum - 1].head)
1883 signal (w->signum, SIG_DFL);
1887 ev_child_start (EV_P_ ev_child *w)
1890 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1892 if (expect_false (ev_is_active (w)))
1895 ev_start (EV_A_ (W)w, 1);
1896 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1900 ev_child_stop (EV_P_ ev_child *w)
1902 clear_pending (EV_A_ (W)w);
1903 if (expect_false (!ev_is_active (w)))
1906 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1907 ev_stop (EV_A_ (W)w);
1914 # define lstat(a,b) _stati64 (a,b)
1917 #define DEF_STAT_INTERVAL 5.0074891
1918 #define MIN_STAT_INTERVAL 0.1074891
1920 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1923 # define EV_INOTIFY_BUFSIZE 8192
1925 static void noinline
1926 infy_add (EV_P_ ev_stat *w)
1928 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
1932 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1934 /* monitor some parent directory for speedup hints */
1935 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1938 strcpy (path, w->path);
1942 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1943 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1945 char *pend = strrchr (path, '/');
1948 break; /* whoops, no '/', complain to your admin */
1951 w->wd = inotify_add_watch (fs_fd, path, mask);
1953 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1957 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1960 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1963 static void noinline
1964 infy_del (EV_P_ ev_stat *w)
1973 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
1974 wlist_del (&fs_hash [slot].head, (WL)w);
1976 /* remove this watcher, if others are watching it, they will rearm */
1977 inotify_rm_watch (fs_fd, wd);
1980 static void noinline
1981 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1984 /* overflow, need to check for all hahs slots */
1985 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1986 infy_wd (EV_A_ slot, wd, ev);
1991 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
1993 ev_stat *w = (ev_stat *)w_;
1994 w_ = w_->next; /* lets us remove this watcher and all before it */
1996 if (w->wd == wd || wd == -1)
1998 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2001 infy_add (EV_A_ w); /* re-add, no matter what */
2004 stat_timer_cb (EV_A_ &w->timer, 0);
2011 infy_cb (EV_P_ ev_io *w, int revents)
2013 char buf [EV_INOTIFY_BUFSIZE];
2014 struct inotify_event *ev = (struct inotify_event *)buf;
2016 int len = read (fs_fd, buf, sizeof (buf));
2018 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2019 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2028 fs_fd = inotify_init ();
2032 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2033 ev_set_priority (&fs_w, EV_MAXPRI);
2034 ev_io_start (EV_A_ &fs_w);
2047 fs_fd = inotify_init ();
2049 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2051 WL w_ = fs_hash [slot].head;
2052 fs_hash [slot].head = 0;
2056 ev_stat *w = (ev_stat *)w_;
2057 w_ = w_->next; /* lets us add this watcher */
2062 infy_add (EV_A_ w); /* re-add, no matter what */
2064 ev_timer_start (EV_A_ &w->timer);
2073 ev_stat_stat (EV_P_ ev_stat *w)
2075 if (lstat (w->path, &w->attr) < 0)
2076 w->attr.st_nlink = 0;
2077 else if (!w->attr.st_nlink)
2078 w->attr.st_nlink = 1;
2081 static void noinline
2082 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2084 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2086 /* we copy this here each the time so that */
2087 /* prev has the old value when the callback gets invoked */
2089 ev_stat_stat (EV_A_ w);
2091 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2093 w->prev.st_dev != w->attr.st_dev
2094 || w->prev.st_ino != w->attr.st_ino
2095 || w->prev.st_mode != w->attr.st_mode
2096 || w->prev.st_nlink != w->attr.st_nlink
2097 || w->prev.st_uid != w->attr.st_uid
2098 || w->prev.st_gid != w->attr.st_gid
2099 || w->prev.st_rdev != w->attr.st_rdev
2100 || w->prev.st_size != w->attr.st_size
2101 || w->prev.st_atime != w->attr.st_atime
2102 || w->prev.st_mtime != w->attr.st_mtime
2103 || w->prev.st_ctime != w->attr.st_ctime
2108 ev_stat_stat (EV_A_ w); /* avoid race... */
2111 ev_feed_event (EV_A_ w, EV_STAT);
2116 ev_stat_start (EV_P_ ev_stat *w)
2118 if (expect_false (ev_is_active (w)))
2121 /* since we use memcmp, we need to clear any padding data etc. */
2122 memset (&w->prev, 0, sizeof (ev_statdata));
2123 memset (&w->attr, 0, sizeof (ev_statdata));
2125 ev_stat_stat (EV_A_ w);
2127 if (w->interval < MIN_STAT_INTERVAL)
2128 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2130 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2131 ev_set_priority (&w->timer, ev_priority (w));
2140 ev_timer_start (EV_A_ &w->timer);
2142 ev_start (EV_A_ (W)w, 1);
2146 ev_stat_stop (EV_P_ ev_stat *w)
2148 clear_pending (EV_A_ (W)w);
2149 if (expect_false (!ev_is_active (w)))
2155 ev_timer_stop (EV_A_ &w->timer);
2157 ev_stop (EV_A_ (W)w);
2163 ev_idle_start (EV_P_ ev_idle *w)
2165 if (expect_false (ev_is_active (w)))
2168 pri_adjust (EV_A_ (W)w);
2171 int active = ++idlecnt [ABSPRI (w)];
2174 ev_start (EV_A_ (W)w, active);
2176 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2177 idles [ABSPRI (w)][active - 1] = w;
2182 ev_idle_stop (EV_P_ ev_idle *w)
2184 clear_pending (EV_A_ (W)w);
2185 if (expect_false (!ev_is_active (w)))
2189 int active = ((W)w)->active;
2191 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2192 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2194 ev_stop (EV_A_ (W)w);
2201 ev_prepare_start (EV_P_ ev_prepare *w)
2203 if (expect_false (ev_is_active (w)))
2206 ev_start (EV_A_ (W)w, ++preparecnt);
2207 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2208 prepares [preparecnt - 1] = w;
2212 ev_prepare_stop (EV_P_ ev_prepare *w)
2214 clear_pending (EV_A_ (W)w);
2215 if (expect_false (!ev_is_active (w)))
2219 int active = ((W)w)->active;
2220 prepares [active - 1] = prepares [--preparecnt];
2221 ((W)prepares [active - 1])->active = active;
2224 ev_stop (EV_A_ (W)w);
2228 ev_check_start (EV_P_ ev_check *w)
2230 if (expect_false (ev_is_active (w)))
2233 ev_start (EV_A_ (W)w, ++checkcnt);
2234 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2235 checks [checkcnt - 1] = w;
2239 ev_check_stop (EV_P_ ev_check *w)
2241 clear_pending (EV_A_ (W)w);
2242 if (expect_false (!ev_is_active (w)))
2246 int active = ((W)w)->active;
2247 checks [active - 1] = checks [--checkcnt];
2248 ((W)checks [active - 1])->active = active;
2251 ev_stop (EV_A_ (W)w);
2256 ev_embed_sweep (EV_P_ ev_embed *w)
2258 ev_loop (w->other, EVLOOP_NONBLOCK);
2262 embed_io_cb (EV_P_ ev_io *io, int revents)
2264 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2267 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2269 ev_embed_sweep (loop, w);
2273 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2275 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2277 fd_reify (w->other);
2281 ev_embed_start (EV_P_ ev_embed *w)
2283 if (expect_false (ev_is_active (w)))
2287 struct ev_loop *loop = w->other;
2288 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2289 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2292 ev_set_priority (&w->io, ev_priority (w));
2293 ev_io_start (EV_A_ &w->io);
2295 ev_prepare_init (&w->prepare, embed_prepare_cb);
2296 ev_set_priority (&w->prepare, EV_MINPRI);
2297 ev_prepare_start (EV_A_ &w->prepare);
2299 ev_start (EV_A_ (W)w, 1);
2303 ev_embed_stop (EV_P_ ev_embed *w)
2305 clear_pending (EV_A_ (W)w);
2306 if (expect_false (!ev_is_active (w)))
2309 ev_io_stop (EV_A_ &w->io);
2310 ev_prepare_stop (EV_A_ &w->prepare);
2312 ev_stop (EV_A_ (W)w);
2318 ev_fork_start (EV_P_ ev_fork *w)
2320 if (expect_false (ev_is_active (w)))
2323 ev_start (EV_A_ (W)w, ++forkcnt);
2324 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2325 forks [forkcnt - 1] = w;
2329 ev_fork_stop (EV_P_ ev_fork *w)
2331 clear_pending (EV_A_ (W)w);
2332 if (expect_false (!ev_is_active (w)))
2336 int active = ((W)w)->active;
2337 forks [active - 1] = forks [--forkcnt];
2338 ((W)forks [active - 1])->active = active;
2341 ev_stop (EV_A_ (W)w);
2345 /*****************************************************************************/
2351 void (*cb)(int revents, void *arg);
2356 once_cb (EV_P_ struct ev_once *once, int revents)
2358 void (*cb)(int revents, void *arg) = once->cb;
2359 void *arg = once->arg;
2361 ev_io_stop (EV_A_ &once->io);
2362 ev_timer_stop (EV_A_ &once->to);
2369 once_cb_io (EV_P_ ev_io *w, int revents)
2371 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
2375 once_cb_to (EV_P_ ev_timer *w, int revents)
2377 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
2381 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2383 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2385 if (expect_false (!once))
2387 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2394 ev_init (&once->io, once_cb_io);
2397 ev_io_set (&once->io, fd, events);
2398 ev_io_start (EV_A_ &once->io);
2401 ev_init (&once->to, once_cb_to);
2404 ev_timer_set (&once->to, timeout, 0.);
2405 ev_timer_start (EV_A_ &once->to);
2410 #include "ev_wrap.h"