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;
286 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
287 /* giving it a reasonably high chance of working on typical architetcures */
288 static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
292 # include "ev_win32.c"
295 /*****************************************************************************/
297 static void (*syserr_cb)(const char *msg);
300 ev_set_syserr_cb (void (*cb)(const char *msg))
306 syserr (const char *msg)
309 msg = "(libev) system error";
320 static void *(*alloc)(void *ptr, long size);
323 ev_set_allocator (void *(*cb)(void *ptr, long size))
329 ev_realloc (void *ptr, long size)
331 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
335 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
342 #define ev_malloc(size) ev_realloc (0, (size))
343 #define ev_free(ptr) ev_realloc ((ptr), 0)
345 /*****************************************************************************/
350 unsigned char events;
352 #if EV_SELECT_IS_WINSOCKET
375 #define ev_rt_now ((loop)->ev_rt_now)
376 #define VAR(name,decl) decl;
382 static struct ev_loop default_loop_struct;
383 struct ev_loop *ev_default_loop_ptr;
388 #define VAR(name,decl) static decl;
392 static int ev_default_loop_ptr;
396 /*****************************************************************************/
403 clock_gettime (CLOCK_REALTIME, &ts);
404 return ts.tv_sec + ts.tv_nsec * 1e-9;
407 gettimeofday (&tv, 0);
408 return tv.tv_sec + tv.tv_usec * 1e-6;
412 ev_tstamp inline_size
416 if (expect_true (have_monotonic))
419 clock_gettime (CLOCK_MONOTONIC, &ts);
420 return ts.tv_sec + ts.tv_nsec * 1e-9;
436 ev_sleep (ev_tstamp delay)
443 ts.tv_sec = (time_t)delay;
444 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
447 #elif defined(_WIN32)
452 tv.tv_sec = (time_t)delay;
453 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
455 select (0, 0, 0, 0, &tv);
460 /*****************************************************************************/
463 array_nextsize (int elem, int cur, int cnt)
471 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
472 if (elem * ncur > 4096)
475 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
476 ncur = ncur - sizeof (void *) * 4;
483 static noinline void *
484 array_realloc (int elem, void *base, int *cur, int cnt)
486 *cur = array_nextsize (elem, *cur, cnt);
487 return ev_realloc (base, elem * *cur);
490 #define array_needsize(type,base,cur,cnt,init) \
491 if (expect_false ((cnt) > (cur))) \
494 (base) = (type *)array_realloc \
495 (sizeof (type), (base), &(cur), (cnt)); \
496 init ((base) + (ocur_), (cur) - ocur_); \
500 #define array_slim(type,stem) \
501 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
503 stem ## max = array_roundsize (stem ## cnt >> 1); \
504 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
505 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
509 #define array_free(stem, idx) \
510 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
512 /*****************************************************************************/
515 ev_feed_event (EV_P_ void *w, int revents)
518 int pri = ABSPRI (w_);
520 if (expect_false (w_->pending))
521 pendings [pri][w_->pending - 1].events |= revents;
524 w_->pending = ++pendingcnt [pri];
525 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
526 pendings [pri][w_->pending - 1].w = w_;
527 pendings [pri][w_->pending - 1].events = revents;
532 queue_events (EV_P_ W *events, int eventcnt, int type)
536 for (i = 0; i < eventcnt; ++i)
537 ev_feed_event (EV_A_ events [i], type);
540 /*****************************************************************************/
543 anfds_init (ANFD *base, int count)
548 base->events = EV_NONE;
556 fd_event (EV_P_ int fd, int revents)
558 ANFD *anfd = anfds + fd;
561 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
563 int ev = w->events & revents;
566 ev_feed_event (EV_A_ (W)w, ev);
571 ev_feed_fd_event (EV_P_ int fd, int revents)
573 if (fd >= 0 && fd < anfdmax)
574 fd_event (EV_A_ fd, revents);
582 for (i = 0; i < fdchangecnt; ++i)
584 int fd = fdchanges [i];
585 ANFD *anfd = anfds + fd;
588 unsigned char events = 0;
590 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
591 events |= (unsigned char)w->events;
593 #if EV_SELECT_IS_WINSOCKET
597 anfd->handle = _get_osfhandle (fd);
598 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
603 unsigned char o_events = anfd->events;
604 unsigned char o_reify = anfd->reify;
607 anfd->events = events;
609 if (o_events != events || o_reify & EV_IOFDSET)
610 backend_modify (EV_A_ fd, o_events, events);
618 fd_change (EV_P_ int fd, int flags)
620 unsigned char reify = anfds [fd].reify;
621 anfds [fd].reify |= flags;
623 if (expect_true (!reify))
626 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
627 fdchanges [fdchangecnt - 1] = fd;
632 fd_kill (EV_P_ int fd)
636 while ((w = (ev_io *)anfds [fd].head))
638 ev_io_stop (EV_A_ w);
639 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
647 return _get_osfhandle (fd) != -1;
649 return fcntl (fd, F_GETFD) != -1;
653 /* called on EBADF to verify fds */
659 for (fd = 0; fd < anfdmax; ++fd)
660 if (anfds [fd].events)
661 if (!fd_valid (fd) == -1 && errno == EBADF)
665 /* called on ENOMEM in select/poll to kill some fds and retry */
671 for (fd = anfdmax; fd--; )
672 if (anfds [fd].events)
679 /* usually called after fork if backend needs to re-arm all fds from scratch */
685 for (fd = 0; fd < anfdmax; ++fd)
686 if (anfds [fd].events)
688 anfds [fd].events = 0;
689 fd_change (EV_A_ fd, EV_IOFDSET | 1);
693 /*****************************************************************************/
696 upheap (WT *heap, int k)
702 int p = (k - 1) >> 1;
704 if (heap [p]->at <= w->at)
708 ((W)heap [k])->active = k + 1;
713 ((W)heap [k])->active = k + 1;
717 downheap (WT *heap, int N, int k)
723 int c = (k << 1) + 1;
728 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
731 if (w->at <= heap [c]->at)
735 ((W)heap [k])->active = k + 1;
741 ((W)heap [k])->active = k + 1;
745 adjustheap (WT *heap, int N, int k)
748 downheap (heap, N, k);
751 /*****************************************************************************/
756 sig_atomic_t volatile gotsig;
759 static ANSIG *signals;
760 static int signalmax;
762 static int sigpipe [2];
763 static sig_atomic_t volatile gotsig;
767 signals_init (ANSIG *base, int count)
779 sighandler (int signum)
782 signal (signum, sighandler);
785 signals [signum - 1].gotsig = 1;
789 int old_errno = errno;
791 write (sigpipe [1], &signum, 1);
797 ev_feed_signal_event (EV_P_ int signum)
802 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
807 if (signum < 0 || signum >= signalmax)
810 signals [signum].gotsig = 0;
812 for (w = signals [signum].head; w; w = w->next)
813 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
817 sigcb (EV_P_ ev_io *iow, int revents)
821 read (sigpipe [0], &revents, 1);
824 for (signum = signalmax; signum--; )
825 if (signals [signum].gotsig)
826 ev_feed_signal_event (EV_A_ signum + 1);
834 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
836 fcntl (fd, F_SETFD, FD_CLOEXEC);
837 fcntl (fd, F_SETFL, O_NONBLOCK);
844 fd_intern (sigpipe [0]);
845 fd_intern (sigpipe [1]);
847 ev_io_set (&sigev, sigpipe [0], EV_READ);
848 ev_io_start (EV_A_ &sigev);
849 ev_unref (EV_A); /* child watcher should not keep loop alive */
852 /*****************************************************************************/
854 static WL childs [EV_PID_HASHSIZE];
858 static ev_signal childev;
861 child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
865 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
866 if (w->pid == pid || !w->pid)
868 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
871 ev_feed_event (EV_A_ (W)w, EV_CHILD);
876 # define WCONTINUED 0
880 childcb (EV_P_ ev_signal *sw, int revents)
884 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
885 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
888 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
891 /* make sure we are called again until all childs have been reaped */
892 /* we need to do it this way so that the callback gets called before we continue */
893 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
895 child_reap (EV_A_ sw, pid, pid, status);
896 if (EV_PID_HASHSIZE > 1)
897 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
902 /*****************************************************************************/
905 # include "ev_port.c"
908 # include "ev_kqueue.c"
911 # include "ev_epoll.c"
914 # include "ev_poll.c"
917 # include "ev_select.c"
921 ev_version_major (void)
923 return EV_VERSION_MAJOR;
927 ev_version_minor (void)
929 return EV_VERSION_MINOR;
932 /* return true if we are running with elevated privileges and should ignore env variables */
939 return getuid () != geteuid ()
940 || getgid () != getegid ();
945 ev_supported_backends (void)
947 unsigned int flags = 0;
949 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
950 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
951 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
952 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
953 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
959 ev_recommended_backends (void)
961 unsigned int flags = ev_supported_backends ();
964 /* kqueue is borked on everything but netbsd apparently */
965 /* it usually doesn't work correctly on anything but sockets and pipes */
966 flags &= ~EVBACKEND_KQUEUE;
969 // flags &= ~EVBACKEND_KQUEUE; for documentation
970 flags &= ~EVBACKEND_POLL;
977 ev_embeddable_backends (void)
979 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
981 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
982 /* please fix it and tell me how to detect the fix */
983 flags &= ~EVBACKEND_EPOLL;
1001 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1003 io_blocktime = interval;
1007 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1009 timeout_blocktime = interval;
1012 static void noinline
1013 loop_init (EV_P_ unsigned int flags)
1017 #if EV_USE_MONOTONIC
1020 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1025 ev_rt_now = ev_time ();
1026 mn_now = get_clock ();
1028 rtmn_diff = ev_rt_now - mn_now;
1031 timeout_blocktime = 0.;
1033 /* pid check not overridable via env */
1035 if (flags & EVFLAG_FORKCHECK)
1039 if (!(flags & EVFLAG_NOENV)
1040 && !enable_secure ()
1041 && getenv ("LIBEV_FLAGS"))
1042 flags = atoi (getenv ("LIBEV_FLAGS"));
1044 if (!(flags & 0x0000ffffUL))
1045 flags |= ev_recommended_backends ();
1054 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1057 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1060 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1063 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1066 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1069 ev_init (&sigev, sigcb);
1070 ev_set_priority (&sigev, EV_MAXPRI);
1074 static void noinline
1084 if (backend_fd >= 0)
1088 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1091 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1094 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1097 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1100 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1103 for (i = NUMPRI; i--; )
1105 array_free (pending, [i]);
1107 array_free (idle, [i]);
1111 ev_free (anfds); anfdmax = 0;
1113 /* have to use the microsoft-never-gets-it-right macro */
1114 array_free (fdchange, EMPTY);
1115 array_free (timer, EMPTY);
1116 #if EV_PERIODIC_ENABLE
1117 array_free (periodic, EMPTY);
1120 array_free (fork, EMPTY);
1122 array_free (prepare, EMPTY);
1123 array_free (check, EMPTY);
1128 void inline_size infy_fork (EV_P);
1134 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1137 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1140 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1146 if (ev_is_active (&sigev))
1151 ev_io_stop (EV_A_ &sigev);
1152 close (sigpipe [0]);
1153 close (sigpipe [1]);
1155 while (pipe (sigpipe))
1156 syserr ("(libev) error creating pipe");
1166 ev_loop_new (unsigned int flags)
1168 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1170 memset (loop, 0, sizeof (struct ev_loop));
1172 loop_init (EV_A_ flags);
1174 if (ev_backend (EV_A))
1181 ev_loop_destroy (EV_P)
1183 loop_destroy (EV_A);
1197 ev_default_loop_init (unsigned int flags)
1200 ev_default_loop (unsigned int flags)
1203 if (sigpipe [0] == sigpipe [1])
1207 if (!ev_default_loop_ptr)
1210 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1212 ev_default_loop_ptr = 1;
1215 loop_init (EV_A_ flags);
1217 if (ev_backend (EV_A))
1222 ev_signal_init (&childev, childcb, SIGCHLD);
1223 ev_set_priority (&childev, EV_MAXPRI);
1224 ev_signal_start (EV_A_ &childev);
1225 ev_unref (EV_A); /* child watcher should not keep loop alive */
1229 ev_default_loop_ptr = 0;
1232 return ev_default_loop_ptr;
1236 ev_default_destroy (void)
1239 struct ev_loop *loop = ev_default_loop_ptr;
1243 ev_ref (EV_A); /* child watcher */
1244 ev_signal_stop (EV_A_ &childev);
1247 ev_ref (EV_A); /* signal watcher */
1248 ev_io_stop (EV_A_ &sigev);
1250 close (sigpipe [0]); sigpipe [0] = 0;
1251 close (sigpipe [1]); sigpipe [1] = 0;
1253 loop_destroy (EV_A);
1257 ev_default_fork (void)
1260 struct ev_loop *loop = ev_default_loop_ptr;
1267 /*****************************************************************************/
1270 ev_invoke (EV_P_ void *w, int revents)
1272 EV_CB_INVOKE ((W)w, revents);
1280 for (pri = NUMPRI; pri--; )
1281 while (pendingcnt [pri])
1283 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1285 if (expect_true (p->w))
1287 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1290 EV_CB_INVOKE (p->w, p->events);
1298 while (timercnt && ((WT)timers [0])->at <= mn_now)
1300 ev_timer *w = (ev_timer *)timers [0];
1302 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1304 /* first reschedule or stop timer */
1307 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1309 ((WT)w)->at += w->repeat;
1310 if (((WT)w)->at < mn_now)
1311 ((WT)w)->at = mn_now;
1313 downheap (timers, timercnt, 0);
1316 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1318 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1322 #if EV_PERIODIC_ENABLE
1324 periodics_reify (EV_P)
1326 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1328 ev_periodic *w = (ev_periodic *)periodics [0];
1330 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1332 /* first reschedule or stop timer */
1333 if (w->reschedule_cb)
1335 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1336 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1337 downheap (periodics, periodiccnt, 0);
1339 else if (w->interval)
1341 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1342 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1343 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1344 downheap (periodics, periodiccnt, 0);
1347 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1349 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1353 static void noinline
1354 periodics_reschedule (EV_P)
1358 /* adjust periodics after time jump */
1359 for (i = 0; i < periodiccnt; ++i)
1361 ev_periodic *w = (ev_periodic *)periodics [i];
1363 if (w->reschedule_cb)
1364 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1365 else if (w->interval)
1366 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1369 /* now rebuild the heap */
1370 for (i = periodiccnt >> 1; i--; )
1371 downheap (periodics, periodiccnt, i);
1379 if (expect_false (idleall))
1383 for (pri = NUMPRI; pri--; )
1385 if (pendingcnt [pri])
1390 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1399 time_update (EV_P_ ev_tstamp max_block)
1403 #if EV_USE_MONOTONIC
1404 if (expect_true (have_monotonic))
1406 ev_tstamp odiff = rtmn_diff;
1408 mn_now = get_clock ();
1410 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1411 /* interpolate in the meantime */
1412 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1414 ev_rt_now = rtmn_diff + mn_now;
1419 ev_rt_now = ev_time ();
1421 /* loop a few times, before making important decisions.
1422 * on the choice of "4": one iteration isn't enough,
1423 * in case we get preempted during the calls to
1424 * ev_time and get_clock. a second call is almost guaranteed
1425 * to succeed in that case, though. and looping a few more times
1426 * doesn't hurt either as we only do this on time-jumps or
1427 * in the unlikely event of having been preempted here.
1431 rtmn_diff = ev_rt_now - mn_now;
1433 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1434 return; /* all is well */
1436 ev_rt_now = ev_time ();
1437 mn_now = get_clock ();
1441 # if EV_PERIODIC_ENABLE
1442 periodics_reschedule (EV_A);
1444 /* no timer adjustment, as the monotonic clock doesn't jump */
1445 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1450 ev_rt_now = ev_time ();
1452 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1454 #if EV_PERIODIC_ENABLE
1455 periodics_reschedule (EV_A);
1457 /* adjust timers. this is easy, as the offset is the same for all of them */
1458 for (i = 0; i < timercnt; ++i)
1459 ((WT)timers [i])->at += ev_rt_now - mn_now;
1478 static int loop_done;
1481 ev_loop (EV_P_ int flags)
1483 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1487 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1492 if (expect_false (curpid)) /* penalise the forking check even more */
1493 if (expect_false (getpid () != curpid))
1501 /* we might have forked, so queue fork handlers */
1502 if (expect_false (postfork))
1505 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1506 call_pending (EV_A);
1510 /* queue prepare watchers (and execute them) */
1511 if (expect_false (preparecnt))
1513 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1514 call_pending (EV_A);
1517 if (expect_false (!activecnt))
1520 /* we might have forked, so reify kernel state if necessary */
1521 if (expect_false (postfork))
1524 /* update fd-related kernel structures */
1527 /* calculate blocking time */
1529 ev_tstamp waittime = 0.;
1530 ev_tstamp sleeptime = 0.;
1532 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1534 /* update time to cancel out callback processing overhead */
1535 time_update (EV_A_ 1e100);
1537 waittime = MAX_BLOCKTIME;
1541 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1542 if (waittime > to) waittime = to;
1545 #if EV_PERIODIC_ENABLE
1548 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1549 if (waittime > to) waittime = to;
1553 if (expect_false (waittime < timeout_blocktime))
1554 waittime = timeout_blocktime;
1556 sleeptime = waittime - backend_fudge;
1558 if (expect_true (sleeptime > io_blocktime))
1559 sleeptime = io_blocktime;
1563 ev_sleep (sleeptime);
1564 waittime -= sleeptime;
1569 backend_poll (EV_A_ waittime);
1571 /* update ev_rt_now, do magic */
1572 time_update (EV_A_ waittime + sleeptime);
1575 /* queue pending timers and reschedule them */
1576 timers_reify (EV_A); /* relative timers called last */
1577 #if EV_PERIODIC_ENABLE
1578 periodics_reify (EV_A); /* absolute timers called first */
1582 /* queue idle watchers unless other events are pending */
1586 /* queue check watchers, to be executed first */
1587 if (expect_false (checkcnt))
1588 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1590 call_pending (EV_A);
1593 while (expect_true (activecnt && !loop_done));
1595 if (loop_done == EVUNLOOP_ONE)
1596 loop_done = EVUNLOOP_CANCEL;
1600 ev_unloop (EV_P_ int how)
1605 /*****************************************************************************/
1608 wlist_add (WL *head, WL elem)
1615 wlist_del (WL *head, WL elem)
1625 head = &(*head)->next;
1630 clear_pending (EV_P_ W w)
1634 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1640 ev_clear_pending (EV_P_ void *w)
1643 int pending = w_->pending;
1645 if (expect_true (pending))
1647 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1657 pri_adjust (EV_P_ W w)
1659 int pri = w->priority;
1660 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1661 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1666 ev_start (EV_P_ W w, int active)
1668 pri_adjust (EV_A_ w);
1680 /*****************************************************************************/
1683 ev_io_start (EV_P_ ev_io *w)
1687 if (expect_false (ev_is_active (w)))
1690 assert (("ev_io_start called with negative fd", fd >= 0));
1692 ev_start (EV_A_ (W)w, 1);
1693 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1694 wlist_add (&anfds[fd].head, (WL)w);
1696 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1697 w->events &= ~EV_IOFDSET;
1701 ev_io_stop (EV_P_ ev_io *w)
1703 clear_pending (EV_A_ (W)w);
1704 if (expect_false (!ev_is_active (w)))
1707 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1709 wlist_del (&anfds[w->fd].head, (WL)w);
1710 ev_stop (EV_A_ (W)w);
1712 fd_change (EV_A_ w->fd, 1);
1716 ev_timer_start (EV_P_ ev_timer *w)
1718 if (expect_false (ev_is_active (w)))
1721 ((WT)w)->at += mn_now;
1723 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1725 ev_start (EV_A_ (W)w, ++timercnt);
1726 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1727 timers [timercnt - 1] = (WT)w;
1728 upheap (timers, timercnt - 1);
1730 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1734 ev_timer_stop (EV_P_ ev_timer *w)
1736 clear_pending (EV_A_ (W)w);
1737 if (expect_false (!ev_is_active (w)))
1740 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1743 int active = ((W)w)->active;
1745 if (expect_true (--active < --timercnt))
1747 timers [active] = timers [timercnt];
1748 adjustheap (timers, timercnt, active);
1752 ((WT)w)->at -= mn_now;
1754 ev_stop (EV_A_ (W)w);
1758 ev_timer_again (EV_P_ ev_timer *w)
1760 if (ev_is_active (w))
1764 ((WT)w)->at = mn_now + w->repeat;
1765 adjustheap (timers, timercnt, ((W)w)->active - 1);
1768 ev_timer_stop (EV_A_ w);
1773 ev_timer_start (EV_A_ w);
1777 #if EV_PERIODIC_ENABLE
1779 ev_periodic_start (EV_P_ ev_periodic *w)
1781 if (expect_false (ev_is_active (w)))
1784 if (w->reschedule_cb)
1785 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1786 else if (w->interval)
1788 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1789 /* this formula differs from the one in periodic_reify because we do not always round up */
1790 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1793 ((WT)w)->at = w->offset;
1795 ev_start (EV_A_ (W)w, ++periodiccnt);
1796 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1797 periodics [periodiccnt - 1] = (WT)w;
1798 upheap (periodics, periodiccnt - 1);
1800 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1804 ev_periodic_stop (EV_P_ ev_periodic *w)
1806 clear_pending (EV_A_ (W)w);
1807 if (expect_false (!ev_is_active (w)))
1810 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1813 int active = ((W)w)->active;
1815 if (expect_true (--active < --periodiccnt))
1817 periodics [active] = periodics [periodiccnt];
1818 adjustheap (periodics, periodiccnt, active);
1822 ev_stop (EV_A_ (W)w);
1826 ev_periodic_again (EV_P_ ev_periodic *w)
1828 /* TODO: use adjustheap and recalculation */
1829 ev_periodic_stop (EV_A_ w);
1830 ev_periodic_start (EV_A_ w);
1835 # define SA_RESTART 0
1839 ev_signal_start (EV_P_ ev_signal *w)
1842 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1844 if (expect_false (ev_is_active (w)))
1847 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1851 sigset_t full, prev;
1853 sigprocmask (SIG_SETMASK, &full, &prev);
1856 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1859 sigprocmask (SIG_SETMASK, &prev, 0);
1863 ev_start (EV_A_ (W)w, 1);
1864 wlist_add (&signals [w->signum - 1].head, (WL)w);
1869 signal (w->signum, sighandler);
1871 struct sigaction sa;
1872 sa.sa_handler = sighandler;
1873 sigfillset (&sa.sa_mask);
1874 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1875 sigaction (w->signum, &sa, 0);
1881 ev_signal_stop (EV_P_ ev_signal *w)
1883 clear_pending (EV_A_ (W)w);
1884 if (expect_false (!ev_is_active (w)))
1887 wlist_del (&signals [w->signum - 1].head, (WL)w);
1888 ev_stop (EV_A_ (W)w);
1890 if (!signals [w->signum - 1].head)
1891 signal (w->signum, SIG_DFL);
1895 ev_child_start (EV_P_ ev_child *w)
1898 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1900 if (expect_false (ev_is_active (w)))
1903 ev_start (EV_A_ (W)w, 1);
1904 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1908 ev_child_stop (EV_P_ ev_child *w)
1910 clear_pending (EV_A_ (W)w);
1911 if (expect_false (!ev_is_active (w)))
1914 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1915 ev_stop (EV_A_ (W)w);
1922 # define lstat(a,b) _stati64 (a,b)
1925 #define DEF_STAT_INTERVAL 5.0074891
1926 #define MIN_STAT_INTERVAL 0.1074891
1928 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1931 # define EV_INOTIFY_BUFSIZE 8192
1933 static void noinline
1934 infy_add (EV_P_ ev_stat *w)
1936 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);
1940 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1942 /* monitor some parent directory for speedup hints */
1943 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1946 strcpy (path, w->path);
1950 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1951 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1953 char *pend = strrchr (path, '/');
1956 break; /* whoops, no '/', complain to your admin */
1959 w->wd = inotify_add_watch (fs_fd, path, mask);
1961 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1965 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1968 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1971 static void noinline
1972 infy_del (EV_P_ ev_stat *w)
1981 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
1982 wlist_del (&fs_hash [slot].head, (WL)w);
1984 /* remove this watcher, if others are watching it, they will rearm */
1985 inotify_rm_watch (fs_fd, wd);
1988 static void noinline
1989 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1992 /* overflow, need to check for all hahs slots */
1993 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1994 infy_wd (EV_A_ slot, wd, ev);
1999 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2001 ev_stat *w = (ev_stat *)w_;
2002 w_ = w_->next; /* lets us remove this watcher and all before it */
2004 if (w->wd == wd || wd == -1)
2006 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2009 infy_add (EV_A_ w); /* re-add, no matter what */
2012 stat_timer_cb (EV_A_ &w->timer, 0);
2019 infy_cb (EV_P_ ev_io *w, int revents)
2021 char buf [EV_INOTIFY_BUFSIZE];
2022 struct inotify_event *ev = (struct inotify_event *)buf;
2024 int len = read (fs_fd, buf, sizeof (buf));
2026 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2027 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2036 fs_fd = inotify_init ();
2040 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2041 ev_set_priority (&fs_w, EV_MAXPRI);
2042 ev_io_start (EV_A_ &fs_w);
2055 fs_fd = inotify_init ();
2057 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2059 WL w_ = fs_hash [slot].head;
2060 fs_hash [slot].head = 0;
2064 ev_stat *w = (ev_stat *)w_;
2065 w_ = w_->next; /* lets us add this watcher */
2070 infy_add (EV_A_ w); /* re-add, no matter what */
2072 ev_timer_start (EV_A_ &w->timer);
2081 ev_stat_stat (EV_P_ ev_stat *w)
2083 if (lstat (w->path, &w->attr) < 0)
2084 w->attr.st_nlink = 0;
2085 else if (!w->attr.st_nlink)
2086 w->attr.st_nlink = 1;
2089 static void noinline
2090 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2092 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2094 /* we copy this here each the time so that */
2095 /* prev has the old value when the callback gets invoked */
2097 ev_stat_stat (EV_A_ w);
2099 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2101 w->prev.st_dev != w->attr.st_dev
2102 || w->prev.st_ino != w->attr.st_ino
2103 || w->prev.st_mode != w->attr.st_mode
2104 || w->prev.st_nlink != w->attr.st_nlink
2105 || w->prev.st_uid != w->attr.st_uid
2106 || w->prev.st_gid != w->attr.st_gid
2107 || w->prev.st_rdev != w->attr.st_rdev
2108 || w->prev.st_size != w->attr.st_size
2109 || w->prev.st_atime != w->attr.st_atime
2110 || w->prev.st_mtime != w->attr.st_mtime
2111 || w->prev.st_ctime != w->attr.st_ctime
2116 ev_stat_stat (EV_A_ w); /* avoid race... */
2119 ev_feed_event (EV_A_ w, EV_STAT);
2124 ev_stat_start (EV_P_ ev_stat *w)
2126 if (expect_false (ev_is_active (w)))
2129 /* since we use memcmp, we need to clear any padding data etc. */
2130 memset (&w->prev, 0, sizeof (ev_statdata));
2131 memset (&w->attr, 0, sizeof (ev_statdata));
2133 ev_stat_stat (EV_A_ w);
2135 if (w->interval < MIN_STAT_INTERVAL)
2136 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2138 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2139 ev_set_priority (&w->timer, ev_priority (w));
2148 ev_timer_start (EV_A_ &w->timer);
2150 ev_start (EV_A_ (W)w, 1);
2154 ev_stat_stop (EV_P_ ev_stat *w)
2156 clear_pending (EV_A_ (W)w);
2157 if (expect_false (!ev_is_active (w)))
2163 ev_timer_stop (EV_A_ &w->timer);
2165 ev_stop (EV_A_ (W)w);
2171 ev_idle_start (EV_P_ ev_idle *w)
2173 if (expect_false (ev_is_active (w)))
2176 pri_adjust (EV_A_ (W)w);
2179 int active = ++idlecnt [ABSPRI (w)];
2182 ev_start (EV_A_ (W)w, active);
2184 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2185 idles [ABSPRI (w)][active - 1] = w;
2190 ev_idle_stop (EV_P_ ev_idle *w)
2192 clear_pending (EV_A_ (W)w);
2193 if (expect_false (!ev_is_active (w)))
2197 int active = ((W)w)->active;
2199 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2200 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2202 ev_stop (EV_A_ (W)w);
2209 ev_prepare_start (EV_P_ ev_prepare *w)
2211 if (expect_false (ev_is_active (w)))
2214 ev_start (EV_A_ (W)w, ++preparecnt);
2215 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2216 prepares [preparecnt - 1] = w;
2220 ev_prepare_stop (EV_P_ ev_prepare *w)
2222 clear_pending (EV_A_ (W)w);
2223 if (expect_false (!ev_is_active (w)))
2227 int active = ((W)w)->active;
2228 prepares [active - 1] = prepares [--preparecnt];
2229 ((W)prepares [active - 1])->active = active;
2232 ev_stop (EV_A_ (W)w);
2236 ev_check_start (EV_P_ ev_check *w)
2238 if (expect_false (ev_is_active (w)))
2241 ev_start (EV_A_ (W)w, ++checkcnt);
2242 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2243 checks [checkcnt - 1] = w;
2247 ev_check_stop (EV_P_ ev_check *w)
2249 clear_pending (EV_A_ (W)w);
2250 if (expect_false (!ev_is_active (w)))
2254 int active = ((W)w)->active;
2255 checks [active - 1] = checks [--checkcnt];
2256 ((W)checks [active - 1])->active = active;
2259 ev_stop (EV_A_ (W)w);
2264 ev_embed_sweep (EV_P_ ev_embed *w)
2266 ev_loop (w->other, EVLOOP_NONBLOCK);
2270 embed_io_cb (EV_P_ ev_io *io, int revents)
2272 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2275 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2277 ev_loop (w->other, EVLOOP_NONBLOCK);
2281 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2283 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2286 struct ev_loop *loop = w->other;
2291 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2298 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2300 ev_idle_stop (EV_A_ idle);
2305 ev_embed_start (EV_P_ ev_embed *w)
2307 if (expect_false (ev_is_active (w)))
2311 struct ev_loop *loop = w->other;
2312 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2313 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2316 ev_set_priority (&w->io, ev_priority (w));
2317 ev_io_start (EV_A_ &w->io);
2319 ev_prepare_init (&w->prepare, embed_prepare_cb);
2320 ev_set_priority (&w->prepare, EV_MINPRI);
2321 ev_prepare_start (EV_A_ &w->prepare);
2323 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2325 ev_start (EV_A_ (W)w, 1);
2329 ev_embed_stop (EV_P_ ev_embed *w)
2331 clear_pending (EV_A_ (W)w);
2332 if (expect_false (!ev_is_active (w)))
2335 ev_io_stop (EV_A_ &w->io);
2336 ev_prepare_stop (EV_A_ &w->prepare);
2338 ev_stop (EV_A_ (W)w);
2344 ev_fork_start (EV_P_ ev_fork *w)
2346 if (expect_false (ev_is_active (w)))
2349 ev_start (EV_A_ (W)w, ++forkcnt);
2350 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2351 forks [forkcnt - 1] = w;
2355 ev_fork_stop (EV_P_ ev_fork *w)
2357 clear_pending (EV_A_ (W)w);
2358 if (expect_false (!ev_is_active (w)))
2362 int active = ((W)w)->active;
2363 forks [active - 1] = forks [--forkcnt];
2364 ((W)forks [active - 1])->active = active;
2367 ev_stop (EV_A_ (W)w);
2371 /*****************************************************************************/
2377 void (*cb)(int revents, void *arg);
2382 once_cb (EV_P_ struct ev_once *once, int revents)
2384 void (*cb)(int revents, void *arg) = once->cb;
2385 void *arg = once->arg;
2387 ev_io_stop (EV_A_ &once->io);
2388 ev_timer_stop (EV_A_ &once->to);
2395 once_cb_io (EV_P_ ev_io *w, int revents)
2397 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
2401 once_cb_to (EV_P_ ev_timer *w, int revents)
2403 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
2407 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2409 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2411 if (expect_false (!once))
2413 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2420 ev_init (&once->io, once_cb_io);
2423 ev_io_set (&once->io, fd, events);
2424 ev_io_start (EV_A_ &once->io);
2427 ev_init (&once->to, once_cb_to);
2430 ev_timer_set (&once->to, timeout, 0.);
2431 ev_timer_start (EV_A_ &once->to);
2436 #include "ev_wrap.h"