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Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.56 by root, Sun Nov 4 15:58:49 2007 UTC

1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
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.
18 *
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.
30 */
31#ifndef EV_STANDALONE
32# include "config.h"
33#endif
34
1#include <math.h> 35#include <math.h>
2#include <stdlib.h> 36#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h>
3 41
4#include <stdio.h> 42#include <stdio.h>
5 43
44#include <assert.h>
6#include <errno.h> 45#include <errno.h>
46#include <sys/types.h>
47#ifndef WIN32
48# include <sys/wait.h>
49#endif
7#include <sys/time.h> 50#include <sys/time.h>
8#include <time.h> 51#include <time.h>
9 52
53/**/
54
55#ifndef EV_USE_MONOTONIC
56# define EV_USE_MONOTONIC 1
57#endif
58
59#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1
61#endif
62
63#ifndef EV_USEV_POLL
64# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
65#endif
66
67#ifndef EV_USE_EPOLL
68# define EV_USE_EPOLL 0
69#endif
70
71#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0
73#endif
74
75#ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 1
77#endif
78
79/**/
80
10#ifdef CLOCK_MONOTONIC 81#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC
11# define HAVE_MONOTONIC 1 83# define EV_USE_MONOTONIC 0
12#endif 84#endif
13 85
14#define HAVE_EPOLL 1 86#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME
15#define HAVE_REALTIME 1 88# define EV_USE_REALTIME 0
16#define HAVE_SELECT 0 89#endif
17 90
18#define MAX_BLOCKTIME 60. 91/**/
92
93#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
19 97
20#include "ev.h" 98#include "ev.h"
21 99
100#if __GNUC__ >= 3
101# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline
103#else
104# define expect(expr,value) (expr)
105# define inline static
106#endif
107
108#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1)
110
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI)
113
22struct ev_watcher { 114typedef struct ev_watcher *W;
23 EV_WATCHER (ev_watcher); 115typedef struct ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT;
117
118static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
119
120/*****************************************************************************/
121
122typedef struct
123{
124 struct ev_watcher_list *head;
125 unsigned char events;
126 unsigned char reify;
127} ANFD;
128
129typedef struct
130{
131 W w;
132 int events;
133} ANPENDING;
134
135#if EV_MULTIPLICITY
136
137struct ev_loop
138{
139# define VAR(name,decl) decl;
140# include "ev_vars.h"
24}; 141};
142# undef VAR
143# include "ev_wrap.h"
25 144
26struct ev_watcher_list { 145#else
27 EV_WATCHER_LIST (ev_watcher_list);
28};
29 146
30ev_tstamp ev_now; 147# define VAR(name,decl) static decl;
31int ev_method; 148# include "ev_vars.h"
149# undef VAR
32 150
33static int have_monotonic; /* runtime */ 151#endif
34 152
35static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 153/*****************************************************************************/
36static void (*method_reify)(void);
37static void (*method_poll)(ev_tstamp timeout);
38 154
39ev_tstamp 155inline ev_tstamp
40ev_time (void) 156ev_time (void)
41{ 157{
42#if HAVE_REALTIME 158#if EV_USE_REALTIME
43 struct timespec ts; 159 struct timespec ts;
44 clock_gettime (CLOCK_REALTIME, &ts); 160 clock_gettime (CLOCK_REALTIME, &ts);
45 return ts.tv_sec + ts.tv_nsec * 1e-9; 161 return ts.tv_sec + ts.tv_nsec * 1e-9;
46#else 162#else
47 struct timeval tv; 163 struct timeval tv;
48 gettimeofday (&tv, 0); 164 gettimeofday (&tv, 0);
49 return tv.tv_sec + tv.tv_usec * 1e-6; 165 return tv.tv_sec + tv.tv_usec * 1e-6;
50#endif 166#endif
51} 167}
52 168
53static ev_tstamp 169inline ev_tstamp
54get_clock (void) 170get_clock (void)
55{ 171{
56#if HAVE_MONOTONIC 172#if EV_USE_MONOTONIC
57 if (have_monotonic) 173 if (expect_true (have_monotonic))
58 { 174 {
59 struct timespec ts; 175 struct timespec ts;
60 clock_gettime (CLOCK_MONOTONIC, &ts); 176 clock_gettime (CLOCK_MONOTONIC, &ts);
61 return ts.tv_sec + ts.tv_nsec * 1e-9; 177 return ts.tv_sec + ts.tv_nsec * 1e-9;
62 } 178 }
63#endif 179#endif
64 180
65 return ev_time (); 181 return ev_time ();
66} 182}
67 183
184ev_tstamp
185ev_now (EV_P)
186{
187 return rt_now;
188}
189
190#define array_roundsize(base,n) ((n) | 4 & ~3)
191
68#define array_needsize(base,cur,cnt,init) \ 192#define array_needsize(base,cur,cnt,init) \
69 if ((cnt) > cur) \ 193 if (expect_false ((cnt) > cur)) \
70 { \ 194 { \
71 int newcnt = cur ? cur << 1 : 16; \ 195 int newcnt = cur; \
72 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 196 do \
197 { \
198 newcnt = array_roundsize (base, newcnt << 1); \
199 } \
200 while ((cnt) > newcnt); \
201 \
73 base = realloc (base, sizeof (*base) * (newcnt)); \ 202 base = realloc (base, sizeof (*base) * (newcnt)); \
74 init (base + cur, newcnt - cur); \ 203 init (base + cur, newcnt - cur); \
75 cur = newcnt; \ 204 cur = newcnt; \
76 } 205 }
77 206
78typedef struct 207/*****************************************************************************/
79{
80 struct ev_io *head;
81 unsigned char wev, rev; /* want, received event set */
82} ANFD;
83
84static ANFD *anfds;
85static int anfdmax;
86
87static int *fdchanges;
88static int fdchangemax, fdchangecnt;
89 208
90static void 209static void
91anfds_init (ANFD *base, int count) 210anfds_init (ANFD *base, int count)
92{ 211{
93 while (count--) 212 while (count--)
94 { 213 {
95 base->head = 0; 214 base->head = 0;
96 base->wev = base->rev = EV_NONE; 215 base->events = EV_NONE;
216 base->reify = 0;
217
97 ++base; 218 ++base;
98 } 219 }
99} 220}
100 221
101typedef struct
102{
103 struct ev_watcher *w;
104 int events;
105} ANPENDING;
106
107static ANPENDING *pendings;
108static int pendingmax, pendingcnt;
109
110static void 222static void
111event (struct ev_watcher *w, int events) 223event (EV_P_ W w, int events)
112{ 224{
225 if (w->pending)
226 {
227 pendings [ABSPRI (w)][w->pending - 1].events |= events;
228 return;
229 }
230
113 w->pending = ++pendingcnt; 231 w->pending = ++pendingcnt [ABSPRI (w)];
114 array_needsize (pendings, pendingmax, pendingcnt, ); 232 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
115 pendings [pendingcnt - 1].w = w; 233 pendings [ABSPRI (w)][w->pending - 1].w = w;
116 pendings [pendingcnt - 1].events = events; 234 pendings [ABSPRI (w)][w->pending - 1].events = events;
117} 235}
118 236
119static void 237static void
238queue_events (EV_P_ W *events, int eventcnt, int type)
239{
240 int i;
241
242 for (i = 0; i < eventcnt; ++i)
243 event (EV_A_ events [i], type);
244}
245
246static void
120fd_event (int fd, int events) 247fd_event (EV_P_ int fd, int events)
121{ 248{
122 ANFD *anfd = anfds + fd; 249 ANFD *anfd = anfds + fd;
123 struct ev_io *w; 250 struct ev_io *w;
124 251
125 for (w = anfd->head; w; w = w->next) 252 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
126 { 253 {
127 int ev = w->events & events; 254 int ev = w->events & events;
128 255
129 if (ev) 256 if (ev)
130 event ((struct ev_watcher *)w, ev); 257 event (EV_A_ (W)w, ev);
258 }
259}
260
261/*****************************************************************************/
262
263static void
264fd_reify (EV_P)
265{
266 int i;
267
268 for (i = 0; i < fdchangecnt; ++i)
269 {
270 int fd = fdchanges [i];
271 ANFD *anfd = anfds + fd;
272 struct ev_io *w;
273
274 int events = 0;
275
276 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
277 events |= w->events;
278
279 anfd->reify = 0;
280
281 if (anfd->events != events)
282 {
283 method_modify (EV_A_ fd, anfd->events, events);
284 anfd->events = events;
285 }
286 }
287
288 fdchangecnt = 0;
289}
290
291static void
292fd_change (EV_P_ int fd)
293{
294 if (anfds [fd].reify || fdchangecnt < 0)
295 return;
296
297 anfds [fd].reify = 1;
298
299 ++fdchangecnt;
300 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
301 fdchanges [fdchangecnt - 1] = fd;
302}
303
304static void
305fd_kill (EV_P_ int fd)
306{
307 struct ev_io *w;
308
309 while ((w = (struct ev_io *)anfds [fd].head))
310 {
311 ev_io_stop (EV_A_ w);
312 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
313 }
314}
315
316/* called on EBADF to verify fds */
317static void
318fd_ebadf (EV_P)
319{
320 int fd;
321
322 for (fd = 0; fd < anfdmax; ++fd)
323 if (anfds [fd].events)
324 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
325 fd_kill (EV_A_ fd);
326}
327
328/* called on ENOMEM in select/poll to kill some fds and retry */
329static void
330fd_enomem (EV_P)
331{
332 int fd = anfdmax;
333
334 while (fd--)
335 if (anfds [fd].events)
336 {
337 close (fd);
338 fd_kill (EV_A_ fd);
339 return;
131 } 340 }
132} 341}
133 342
134static struct ev_timer **timers; 343/* susually called after fork if method needs to re-arm all fds from scratch */
135static int timermax, timercnt;
136
137static void 344static void
138upheap (int k) 345fd_rearm_all (EV_P)
139{ 346{
140 struct ev_timer *w = timers [k]; 347 int fd;
141 348
349 /* this should be highly optimised to not do anything but set a flag */
350 for (fd = 0; fd < anfdmax; ++fd)
351 if (anfds [fd].events)
352 {
353 anfds [fd].events = 0;
354 fd_change (fd);
355 }
356}
357
358/*****************************************************************************/
359
360static void
361upheap (WT *heap, int k)
362{
363 WT w = heap [k];
364
142 while (k && timers [k >> 1]->at > w->at) 365 while (k && heap [k >> 1]->at > w->at)
143 { 366 {
144 timers [k] = timers [k >> 1]; 367 heap [k] = heap [k >> 1];
145 timers [k]->active = k + 1; 368 heap [k]->active = k + 1;
146 k >>= 1; 369 k >>= 1;
147 } 370 }
148 371
149 timers [k] = w; 372 heap [k] = w;
150 timers [k]->active = k + 1; 373 heap [k]->active = k + 1;
151 374
152} 375}
153 376
154static void 377static void
155downheap (int k) 378downheap (WT *heap, int N, int k)
156{ 379{
157 struct ev_timer *w = timers [k]; 380 WT w = heap [k];
158 381
159 while (k < (timercnt >> 1)) 382 while (k < (N >> 1))
160 { 383 {
161 int j = k << 1; 384 int j = k << 1;
162 385
163 if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at) 386 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
164 ++j; 387 ++j;
165 388
166 if (w->at <= timers [j]->at) 389 if (w->at <= heap [j]->at)
167 break; 390 break;
168 391
169 timers [k] = timers [j]; 392 heap [k] = heap [j];
170 timers [k]->active = k + 1; 393 heap [k]->active = k + 1;
171 k = j; 394 k = j;
172 } 395 }
173 396
174 timers [k] = w; 397 heap [k] = w;
175 timers [k]->active = k + 1; 398 heap [k]->active = k + 1;
176} 399}
177 400
178static struct ev_signal **signals; 401/*****************************************************************************/
402
403typedef struct
404{
405 struct ev_watcher_list *head;
406 sig_atomic_t volatile gotsig;
407} ANSIG;
408
409static ANSIG *signals;
179static int signalmax, signalcnt; 410static int signalmax;
180 411
412static int sigpipe [2];
413static sig_atomic_t volatile gotsig;
414
181static void 415static void
182signals_init (struct ev_signal **base, int count) 416signals_init (ANSIG *base, int count)
183{ 417{
184 while (count--) 418 while (count--)
185 *base++ = 0; 419 {
186} 420 base->head = 0;
421 base->gotsig = 0;
187 422
423 ++base;
424 }
425}
426
427static void
428sighandler (int signum)
429{
430 signals [signum - 1].gotsig = 1;
431
432 if (!gotsig)
433 {
434 int old_errno = errno;
435 gotsig = 1;
436 write (sigpipe [1], &signum, 1);
437 errno = old_errno;
438 }
439}
440
441static void
442sigcb (EV_P_ struct ev_io *iow, int revents)
443{
444 struct ev_watcher_list *w;
445 int signum;
446
447 read (sigpipe [0], &revents, 1);
448 gotsig = 0;
449
450 for (signum = signalmax; signum--; )
451 if (signals [signum].gotsig)
452 {
453 signals [signum].gotsig = 0;
454
455 for (w = signals [signum].head; w; w = w->next)
456 event (EV_A_ (W)w, EV_SIGNAL);
457 }
458}
459
460static void
461siginit (EV_P)
462{
463#ifndef WIN32
464 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
465 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
466
467 /* rather than sort out wether we really need nb, set it */
468 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
469 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
470#endif
471
472 ev_io_set (&sigev, sigpipe [0], EV_READ);
473 ev_io_start (EV_A_ &sigev);
474 ev_unref (EV_A); /* child watcher should not keep loop alive */
475}
476
477/*****************************************************************************/
478
479#ifndef WIN32
480
481#ifndef WCONTINUED
482# define WCONTINUED 0
483#endif
484
485static void
486child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
487{
488 struct ev_child *w;
489
490 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
491 if (w->pid == pid || !w->pid)
492 {
493 w->priority = sw->priority; /* need to do it *now* */
494 w->rpid = pid;
495 w->rstatus = status;
496 event (EV_A_ (W)w, EV_CHILD);
497 }
498}
499
500static void
501childcb (EV_P_ struct ev_signal *sw, int revents)
502{
503 int pid, status;
504
505 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
506 {
507 /* make sure we are called again until all childs have been reaped */
508 event (EV_A_ (W)sw, EV_SIGNAL);
509
510 child_reap (EV_A_ sw, pid, pid, status);
511 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
512 }
513}
514
515#endif
516
517/*****************************************************************************/
518
519#if EV_USE_KQUEUE
520# include "ev_kqueue.c"
521#endif
188#if HAVE_EPOLL 522#if EV_USE_EPOLL
189# include "ev_epoll.c" 523# include "ev_epoll.c"
190#endif 524#endif
525#if EV_USEV_POLL
526# include "ev_poll.c"
527#endif
191#if HAVE_SELECT 528#if EV_USE_SELECT
192# include "ev_select.c" 529# include "ev_select.c"
193#endif 530#endif
194 531
195int ev_init (int flags) 532int
533ev_version_major (void)
196{ 534{
535 return EV_VERSION_MAJOR;
536}
537
538int
539ev_version_minor (void)
540{
541 return EV_VERSION_MINOR;
542}
543
544/* return true if we are running with elevated privileges and should ignore env variables */
545static int
546enable_secure (void)
547{
548#ifdef WIN32
549 return 0;
550#else
551 return getuid () != geteuid ()
552 || getgid () != getegid ();
553#endif
554}
555
556int
557ev_method (EV_P)
558{
559 return method;
560}
561
562static void
563loop_init (EV_P_ int methods)
564{
565 if (!method)
566 {
197#if HAVE_MONOTONIC 567#if EV_USE_MONOTONIC
198 { 568 {
199 struct timespec ts; 569 struct timespec ts;
200 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 570 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201 have_monotonic = 1; 571 have_monotonic = 1;
202 } 572 }
203#endif 573#endif
204 574
205 ev_now = ev_time (); 575 rt_now = ev_time ();
576 mn_now = get_clock ();
577 now_floor = mn_now;
578 rtmn_diff = rt_now - mn_now;
206 579
580 if (methods == EVMETHOD_AUTO)
581 if (!enable_secure () && getenv ("LIBEV_METHODS"))
582 methods = atoi (getenv ("LIBEV_METHODS"));
583 else
584 methods = EVMETHOD_ANY;
585
586 method = 0;
587#if EV_USE_KQUEUE
588 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
589#endif
207#if HAVE_EPOLL 590#if EV_USE_EPOLL
208 if (epoll_init (flags)) 591 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
209 return ev_method;
210#endif 592#endif
593#if EV_USEV_POLL
594 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
595#endif
211#if HAVE_SELECT 596#if EV_USE_SELECT
212 if (select_init (flags)) 597 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
213 return ev_method;
214#endif 598#endif
215
216 ev_method = EVMETHOD_NONE;
217 return ev_method;
218}
219
220void ev_prefork (void)
221{
222}
223
224void ev_postfork_parent (void)
225{
226}
227
228void ev_postfork_child (void)
229{
230#if HAVE_EPOLL
231 epoll_postfork_child ();
232#endif
233}
234
235static void
236call_pending ()
237{
238 int i;
239
240 for (i = 0; i < pendingcnt; ++i)
241 { 599 }
242 ANPENDING *p = pendings + i; 600}
243 601
244 if (p->w) 602void
603loop_destroy (EV_P)
604{
605#if EV_USE_KQUEUE
606 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
607#endif
608#if EV_USE_EPOLL
609 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
610#endif
611#if EV_USEV_POLL
612 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
613#endif
614#if EV_USE_SELECT
615 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
616#endif
617
618 method = 0;
619 /*TODO*/
620}
621
622void
623loop_fork (EV_P)
624{
625 /*TODO*/
626#if EV_USE_EPOLL
627 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
628#endif
629#if EV_USE_KQUEUE
630 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
631#endif
632}
633
634#if EV_MULTIPLICITY
635struct ev_loop *
636ev_loop_new (int methods)
637{
638 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
639
640 loop_init (EV_A_ methods);
641
642 if (ev_methods (EV_A))
643 return loop;
644
645 return 0;
646}
647
648void
649ev_loop_destroy (EV_P)
650{
651 loop_destroy (EV_A);
652 free (loop);
653}
654
655void
656ev_loop_fork (EV_P)
657{
658 loop_fork (EV_A);
659}
660
661#endif
662
663#if EV_MULTIPLICITY
664struct ev_loop default_loop_struct;
665static struct ev_loop *default_loop;
666
667struct ev_loop *
668#else
669static int default_loop;
670
671int
672#endif
673ev_default_loop (int methods)
674{
675 if (sigpipe [0] == sigpipe [1])
676 if (pipe (sigpipe))
677 return 0;
678
679 if (!default_loop)
680 {
681#if EV_MULTIPLICITY
682 struct ev_loop *loop = default_loop = &default_loop_struct;
683#else
684 default_loop = 1;
685#endif
686
687 loop_init (EV_A_ methods);
688
689 if (ev_method (EV_A))
245 { 690 {
246 p->w->pending = 0; 691 ev_watcher_init (&sigev, sigcb);
247 p->w->cb (p->w, p->events); 692 ev_set_priority (&sigev, EV_MAXPRI);
693 siginit (EV_A);
694
695#ifndef WIN32
696 ev_signal_init (&childev, childcb, SIGCHLD);
697 ev_set_priority (&childev, EV_MAXPRI);
698 ev_signal_start (EV_A_ &childev);
699 ev_unref (EV_A); /* child watcher should not keep loop alive */
700#endif
248 } 701 }
702 else
703 default_loop = 0;
704 }
705
706 return default_loop;
707}
708
709void
710ev_default_destroy (void)
711{
712 struct ev_loop *loop = default_loop;
713
714 ev_ref (EV_A); /* child watcher */
715 ev_signal_stop (EV_A_ &childev);
716
717 ev_ref (EV_A); /* signal watcher */
718 ev_io_stop (EV_A_ &sigev);
719
720 close (sigpipe [0]); sigpipe [0] = 0;
721 close (sigpipe [1]); sigpipe [1] = 0;
722
723 loop_destroy (EV_A);
724}
725
726void
727ev_default_fork (EV_P)
728{
729 loop_fork (EV_A);
730
731 ev_io_stop (EV_A_ &sigev);
732 close (sigpipe [0]);
733 close (sigpipe [1]);
734 pipe (sigpipe);
735
736 ev_ref (EV_A); /* signal watcher */
737 siginit (EV_A);
738}
739
740/*****************************************************************************/
741
742static void
743call_pending (EV_P)
744{
745 int pri;
746
747 for (pri = NUMPRI; pri--; )
748 while (pendingcnt [pri])
749 {
750 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
751
752 if (p->w)
753 {
754 p->w->pending = 0;
755 p->w->cb (EV_A_ p->w, p->events);
756 }
249 } 757 }
250
251 pendingcnt = 0;
252} 758}
253 759
254static void 760static void
255timer_reify (void) 761timers_reify (EV_P)
256{ 762{
257 while (timercnt && timers [0]->at <= ev_now) 763 while (timercnt && timers [0]->at <= mn_now)
258 { 764 {
259 struct ev_timer *w = timers [0]; 765 struct ev_timer *w = timers [0];
260 766
261 /* first reschedule timer */ 767 /* first reschedule or stop timer */
262 if (w->repeat) 768 if (w->repeat)
263 { 769 {
264 if (w->is_abs) 770 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
265 w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
266 else
267 w->at = ev_now + w->repeat; 771 w->at = mn_now + w->repeat;
268 772 downheap ((WT *)timers, timercnt, 0);
269 downheap (0);
270 } 773 }
271 else 774 else
272 evtimer_stop (w); /* nonrepeating: stop timer */ 775 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
273 776
274 event ((struct ev_watcher *)w, EV_TIMEOUT); 777 event (EV_A_ (W)w, EV_TIMEOUT);
778 }
779}
780
781static void
782periodics_reify (EV_P)
783{
784 while (periodiccnt && periodics [0]->at <= rt_now)
275 } 785 {
276} 786 struct ev_periodic *w = periodics [0];
277 787
278int ev_loop_done; 788 /* first reschedule or stop timer */
789 if (w->interval)
790 {
791 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
792 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
793 downheap ((WT *)periodics, periodiccnt, 0);
794 }
795 else
796 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
279 797
798 event (EV_A_ (W)w, EV_PERIODIC);
799 }
800}
801
802static void
803periodics_reschedule (EV_P)
804{
805 int i;
806
807 /* adjust periodics after time jump */
808 for (i = 0; i < periodiccnt; ++i)
809 {
810 struct ev_periodic *w = periodics [i];
811
812 if (w->interval)
813 {
814 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
815
816 if (fabs (diff) >= 1e-4)
817 {
818 ev_periodic_stop (EV_A_ w);
819 ev_periodic_start (EV_A_ w);
820
821 i = 0; /* restart loop, inefficient, but time jumps should be rare */
822 }
823 }
824 }
825}
826
827inline int
828time_update_monotonic (EV_P)
829{
830 mn_now = get_clock ();
831
832 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
833 {
834 rt_now = rtmn_diff + mn_now;
835 return 0;
836 }
837 else
838 {
839 now_floor = mn_now;
840 rt_now = ev_time ();
841 return 1;
842 }
843}
844
845static void
846time_update (EV_P)
847{
848 int i;
849
850#if EV_USE_MONOTONIC
851 if (expect_true (have_monotonic))
852 {
853 if (time_update_monotonic (EV_A))
854 {
855 ev_tstamp odiff = rtmn_diff;
856
857 for (i = 4; --i; ) /* loop a few times, before making important decisions */
858 {
859 rtmn_diff = rt_now - mn_now;
860
861 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
862 return; /* all is well */
863
864 rt_now = ev_time ();
865 mn_now = get_clock ();
866 now_floor = mn_now;
867 }
868
869 periodics_reschedule (EV_A);
870 /* no timer adjustment, as the monotonic clock doesn't jump */
871 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
872 }
873 }
874 else
875#endif
876 {
877 rt_now = ev_time ();
878
879 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
880 {
881 periodics_reschedule (EV_A);
882
883 /* adjust timers. this is easy, as the offset is the same for all */
884 for (i = 0; i < timercnt; ++i)
885 timers [i]->at += rt_now - mn_now;
886 }
887
888 mn_now = rt_now;
889 }
890}
891
892void
893ev_ref (EV_P)
894{
895 ++activecnt;
896}
897
898void
899ev_unref (EV_P)
900{
901 --activecnt;
902}
903
904static int loop_done;
905
906void
280int ev_loop (int flags) 907ev_loop (EV_P_ int flags)
281{ 908{
282 double block; 909 double block;
283 ev_loop_done = flags & EVLOOP_ONESHOT; 910 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
284 911
285 do 912 do
286 { 913 {
914 /* queue check watchers (and execute them) */
915 if (expect_false (preparecnt))
916 {
917 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
918 call_pending (EV_A);
919 }
920
287 /* update fd-related kernel structures */ 921 /* update fd-related kernel structures */
288 method_reify (); fdchangecnt = 0; 922 fd_reify (EV_A);
289 923
290 /* calculate blocking time */ 924 /* calculate blocking time */
925
926 /* we only need this for !monotonic clockor timers, but as we basically
927 always have timers, we just calculate it always */
928#if EV_USE_MONOTONIC
929 if (expect_true (have_monotonic))
930 time_update_monotonic (EV_A);
931 else
932#endif
933 {
291 ev_now = ev_time (); 934 rt_now = ev_time ();
935 mn_now = rt_now;
936 }
292 937
293 if (flags & EVLOOP_NONBLOCK) 938 if (flags & EVLOOP_NONBLOCK || idlecnt)
294 block = 0.; 939 block = 0.;
295 else if (!timercnt)
296 block = MAX_BLOCKTIME;
297 else 940 else
298 { 941 {
942 block = MAX_BLOCKTIME;
943
944 if (timercnt)
945 {
299 block = timers [0]->at - ev_now + method_fudge; 946 ev_tstamp to = timers [0]->at - mn_now + method_fudge;
947 if (block > to) block = to;
948 }
949
950 if (periodiccnt)
951 {
952 ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
953 if (block > to) block = to;
954 }
955
300 if (block < 0.) block = 0.; 956 if (block < 0.) block = 0.;
301 else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
302 } 957 }
303 958
304 method_poll (block); 959 method_poll (EV_A_ block);
305 960
961 /* update rt_now, do magic */
962 time_update (EV_A);
963
306 /* put pending timers into pendign queue and reschedule them */ 964 /* queue pending timers and reschedule them */
307 timer_reify (); 965 timers_reify (EV_A); /* relative timers called last */
966 periodics_reify (EV_A); /* absolute timers called first */
308 967
309 ev_now = ev_time (); 968 /* queue idle watchers unless io or timers are pending */
969 if (!pendingcnt)
970 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
971
972 /* queue check watchers, to be executed first */
973 if (checkcnt)
974 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
975
310 call_pending (); 976 call_pending (EV_A);
311 } 977 }
312 while (!ev_loop_done); 978 while (activecnt && !loop_done);
313}
314 979
315static void 980 if (loop_done != 2)
316wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) 981 loop_done = 0;
982}
983
984void
985ev_unloop (EV_P_ int how)
986{
987 loop_done = how;
988}
989
990/*****************************************************************************/
991
992inline void
993wlist_add (WL *head, WL elem)
317{ 994{
318 elem->next = *head; 995 elem->next = *head;
319 *head = elem; 996 *head = elem;
320} 997}
321 998
322static void 999inline void
323wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) 1000wlist_del (WL *head, WL elem)
324{ 1001{
325 while (*head) 1002 while (*head)
326 { 1003 {
327 if (*head == elem) 1004 if (*head == elem)
328 { 1005 {
332 1009
333 head = &(*head)->next; 1010 head = &(*head)->next;
334 } 1011 }
335} 1012}
336 1013
337static void 1014inline void
338ev_start (struct ev_watcher *w, int active) 1015ev_clear_pending (EV_P_ W w)
339{ 1016{
1017 if (w->pending)
1018 {
1019 pendings [ABSPRI (w)][w->pending - 1].w = 0;
340 w->pending = 0; 1020 w->pending = 0;
1021 }
1022}
1023
1024inline void
1025ev_start (EV_P_ W w, int active)
1026{
1027 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
1028 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1029
341 w->active = active; 1030 w->active = active;
1031 ev_ref (EV_A);
342} 1032}
343 1033
344static void 1034inline void
345ev_stop (struct ev_watcher *w) 1035ev_stop (EV_P_ W w)
346{ 1036{
347 if (w->pending) 1037 ev_unref (EV_A);
348 pendings [w->pending - 1].w = 0;
349
350 w->active = 0; 1038 w->active = 0;
351 /* nop */
352} 1039}
353 1040
1041/*****************************************************************************/
1042
354void 1043void
355evio_start (struct ev_io *w) 1044ev_io_start (EV_P_ struct ev_io *w)
356{ 1045{
1046 int fd = w->fd;
1047
357 if (ev_is_active (w)) 1048 if (ev_is_active (w))
358 return; 1049 return;
359 1050
360 int fd = w->fd; 1051 assert (("ev_io_start called with negative fd", fd >= 0));
361 1052
362 ev_start ((struct ev_watcher *)w, 1); 1053 ev_start (EV_A_ (W)w, 1);
363 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1054 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364 wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w); 1055 wlist_add ((WL *)&anfds[fd].head, (WL)w);
365 1056
366 ++fdchangecnt; 1057 fd_change (EV_A_ fd);
367 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
368 fdchanges [fdchangecnt - 1] = fd;
369} 1058}
370 1059
371void 1060void
372evio_stop (struct ev_io *w) 1061ev_io_stop (EV_P_ struct ev_io *w)
373{ 1062{
1063 ev_clear_pending (EV_A_ (W)w);
374 if (!ev_is_active (w)) 1064 if (!ev_is_active (w))
375 return; 1065 return;
376 1066
377 wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); 1067 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
378 ev_stop ((struct ev_watcher *)w); 1068 ev_stop (EV_A_ (W)w);
379 1069
380 ++fdchangecnt; 1070 fd_change (EV_A_ w->fd);
381 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382 fdchanges [fdchangecnt - 1] = w->fd;
383} 1071}
384 1072
385void 1073void
386evtimer_start (struct ev_timer *w) 1074ev_timer_start (EV_P_ struct ev_timer *w)
387{ 1075{
388 if (ev_is_active (w)) 1076 if (ev_is_active (w))
389 return; 1077 return;
390 1078
391 if (w->is_abs)
392 {
393 /* this formula differs from the one in timer_reify becuse we do not round up */
394 if (w->repeat)
395 w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
396 }
397 else
398 w->at += ev_now; 1079 w->at += mn_now;
399 1080
400 ev_start ((struct ev_watcher *)w, ++timercnt); 1081 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1082
1083 ev_start (EV_A_ (W)w, ++timercnt);
401 array_needsize (timers, timermax, timercnt, ); 1084 array_needsize (timers, timermax, timercnt, );
402 timers [timercnt - 1] = w; 1085 timers [timercnt - 1] = w;
403 upheap (timercnt - 1); 1086 upheap ((WT *)timers, timercnt - 1);
404} 1087}
405 1088
406void 1089void
407evtimer_stop (struct ev_timer *w) 1090ev_timer_stop (EV_P_ struct ev_timer *w)
408{ 1091{
1092 ev_clear_pending (EV_A_ (W)w);
409 if (!ev_is_active (w)) 1093 if (!ev_is_active (w))
410 return; 1094 return;
411 1095
412 if (w->active < timercnt--) 1096 if (w->active < timercnt--)
413 { 1097 {
414 timers [w->active - 1] = timers [timercnt]; 1098 timers [w->active - 1] = timers [timercnt];
415 downheap (w->active - 1); 1099 downheap ((WT *)timers, timercnt, w->active - 1);
416 } 1100 }
417 1101
418 ev_stop ((struct ev_watcher *)w); 1102 w->at = w->repeat;
419}
420 1103
1104 ev_stop (EV_A_ (W)w);
1105}
1106
421void 1107void
422evsignal_start (struct ev_signal *w) 1108ev_timer_again (EV_P_ struct ev_timer *w)
423{ 1109{
424 if (ev_is_active (w)) 1110 if (ev_is_active (w))
425 return; 1111 {
1112 if (w->repeat)
1113 {
1114 w->at = mn_now + w->repeat;
1115 downheap ((WT *)timers, timercnt, w->active - 1);
1116 }
1117 else
1118 ev_timer_stop (EV_A_ w);
1119 }
1120 else if (w->repeat)
1121 ev_timer_start (EV_A_ w);
1122}
426 1123
427 ev_start ((struct ev_watcher *)w, 1); 1124void
1125ev_periodic_start (EV_P_ struct ev_periodic *w)
1126{
1127 if (ev_is_active (w))
1128 return;
1129
1130 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1131
1132 /* this formula differs from the one in periodic_reify because we do not always round up */
1133 if (w->interval)
1134 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
1135
1136 ev_start (EV_A_ (W)w, ++periodiccnt);
1137 array_needsize (periodics, periodicmax, periodiccnt, );
1138 periodics [periodiccnt - 1] = w;
1139 upheap ((WT *)periodics, periodiccnt - 1);
1140}
1141
1142void
1143ev_periodic_stop (EV_P_ struct ev_periodic *w)
1144{
1145 ev_clear_pending (EV_A_ (W)w);
1146 if (!ev_is_active (w))
1147 return;
1148
1149 if (w->active < periodiccnt--)
1150 {
1151 periodics [w->active - 1] = periodics [periodiccnt];
1152 downheap ((WT *)periodics, periodiccnt, w->active - 1);
1153 }
1154
1155 ev_stop (EV_A_ (W)w);
1156}
1157
1158void
1159ev_idle_start (EV_P_ struct ev_idle *w)
1160{
1161 if (ev_is_active (w))
1162 return;
1163
1164 ev_start (EV_A_ (W)w, ++idlecnt);
1165 array_needsize (idles, idlemax, idlecnt, );
1166 idles [idlecnt - 1] = w;
1167}
1168
1169void
1170ev_idle_stop (EV_P_ struct ev_idle *w)
1171{
1172 ev_clear_pending (EV_A_ (W)w);
1173 if (ev_is_active (w))
1174 return;
1175
1176 idles [w->active - 1] = idles [--idlecnt];
1177 ev_stop (EV_A_ (W)w);
1178}
1179
1180void
1181ev_prepare_start (EV_P_ struct ev_prepare *w)
1182{
1183 if (ev_is_active (w))
1184 return;
1185
1186 ev_start (EV_A_ (W)w, ++preparecnt);
1187 array_needsize (prepares, preparemax, preparecnt, );
1188 prepares [preparecnt - 1] = w;
1189}
1190
1191void
1192ev_prepare_stop (EV_P_ struct ev_prepare *w)
1193{
1194 ev_clear_pending (EV_A_ (W)w);
1195 if (ev_is_active (w))
1196 return;
1197
1198 prepares [w->active - 1] = prepares [--preparecnt];
1199 ev_stop (EV_A_ (W)w);
1200}
1201
1202void
1203ev_check_start (EV_P_ struct ev_check *w)
1204{
1205 if (ev_is_active (w))
1206 return;
1207
1208 ev_start (EV_A_ (W)w, ++checkcnt);
1209 array_needsize (checks, checkmax, checkcnt, );
1210 checks [checkcnt - 1] = w;
1211}
1212
1213void
1214ev_check_stop (EV_P_ struct ev_check *w)
1215{
1216 ev_clear_pending (EV_A_ (W)w);
1217 if (ev_is_active (w))
1218 return;
1219
1220 checks [w->active - 1] = checks [--checkcnt];
1221 ev_stop (EV_A_ (W)w);
1222}
1223
1224#ifndef SA_RESTART
1225# define SA_RESTART 0
1226#endif
1227
1228void
1229ev_signal_start (EV_P_ struct ev_signal *w)
1230{
1231#if EV_MULTIPLICITY
1232 assert (("signal watchers are only supported in the default loop", loop == default_loop));
1233#endif
1234 if (ev_is_active (w))
1235 return;
1236
1237 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1238
1239 ev_start (EV_A_ (W)w, 1);
428 array_needsize (signals, signalmax, w->signum, signals_init); 1240 array_needsize (signals, signalmax, w->signum, signals_init);
429 wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w); 1241 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
430}
431 1242
1243 if (!w->next)
1244 {
1245 struct sigaction sa;
1246 sa.sa_handler = sighandler;
1247 sigfillset (&sa.sa_mask);
1248 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1249 sigaction (w->signum, &sa, 0);
1250 }
1251}
1252
432void 1253void
433evsignal_stop (struct ev_signal *w) 1254ev_signal_stop (EV_P_ struct ev_signal *w)
434{ 1255{
1256 ev_clear_pending (EV_A_ (W)w);
435 if (!ev_is_active (w)) 1257 if (!ev_is_active (w))
436 return; 1258 return;
437 1259
438 wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w); 1260 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
439 ev_stop ((struct ev_watcher *)w); 1261 ev_stop (EV_A_ (W)w);
1262
1263 if (!signals [w->signum - 1].head)
1264 signal (w->signum, SIG_DFL);
1265}
1266
1267void
1268ev_child_start (EV_P_ struct ev_child *w)
1269{
1270#if EV_MULTIPLICITY
1271 assert (("child watchers are only supported in the default loop", loop == default_loop));
1272#endif
1273 if (ev_is_active (w))
1274 return;
1275
1276 ev_start (EV_A_ (W)w, 1);
1277 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1278}
1279
1280void
1281ev_child_stop (EV_P_ struct ev_child *w)
1282{
1283 ev_clear_pending (EV_A_ (W)w);
1284 if (ev_is_active (w))
1285 return;
1286
1287 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1288 ev_stop (EV_A_ (W)w);
440} 1289}
441 1290
442/*****************************************************************************/ 1291/*****************************************************************************/
443#if 1
444 1292
445static void 1293struct ev_once
446sin_cb (struct ev_io *w, int revents)
447{ 1294{
448 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
449}
450
451static void
452ocb (struct ev_timer *w, int revents)
453{
454 fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
455}
456
457int main (void)
458{
459 struct ev_io sin; 1295 struct ev_io io;
460
461 ev_init (0);
462
463 evw_init (&sin, sin_cb, 55);
464 evio_set (&sin, 0, EV_READ);
465 evio_start (&sin);
466
467 struct ev_timer t[1000]; 1296 struct ev_timer to;
1297 void (*cb)(int revents, void *arg);
1298 void *arg;
1299};
468 1300
469 int i; 1301static void
470 for (i = 0; i < 1000; ++i) 1302once_cb (EV_P_ struct ev_once *once, int revents)
471 { 1303{
472 struct ev_timer *w = t + i; 1304 void (*cb)(int revents, void *arg) = once->cb;
473 evw_init (w, ocb, i); 1305 void *arg = once->arg;
474 evtimer_set_rel (w, drand48 (), 0); 1306
475 evtimer_start (w); 1307 ev_io_stop (EV_A_ &once->io);
476 if (drand48 () < 0.5) 1308 ev_timer_stop (EV_A_ &once->to);
477 evtimer_stop (w); 1309 free (once);
1310
1311 cb (revents, arg);
1312}
1313
1314static void
1315once_cb_io (EV_P_ struct ev_io *w, int revents)
1316{
1317 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1318}
1319
1320static void
1321once_cb_to (EV_P_ struct ev_timer *w, int revents)
1322{
1323 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1324}
1325
1326void
1327ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1328{
1329 struct ev_once *once = malloc (sizeof (struct ev_once));
1330
1331 if (!once)
1332 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1333 else
478 } 1334 {
1335 once->cb = cb;
1336 once->arg = arg;
479 1337
480 ev_loop (0); 1338 ev_watcher_init (&once->io, once_cb_io);
1339 if (fd >= 0)
1340 {
1341 ev_io_set (&once->io, fd, events);
1342 ev_io_start (EV_A_ &once->io);
1343 }
481 1344
482 return 0; 1345 ev_watcher_init (&once->to, once_cb_to);
1346 if (timeout >= 0.)
1347 {
1348 ev_timer_set (&once->to, timeout, 0.);
1349 ev_timer_start (EV_A_ &once->to);
1350 }
1351 }
483} 1352}
484 1353
485#endif
486
487
488
489

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