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Comparing libev/ev.c (file contents):
Revision 1.15 by root, Wed Oct 31 11:56:34 2007 UTC vs.
Revision 1.234 by root, Tue May 6 23:42:16 2008 UTC

1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
132#endif
133
1#include <math.h> 134#include <math.h>
2#include <stdlib.h> 135#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h> 136#include <fcntl.h>
5#include <signal.h> 137#include <stddef.h>
6 138
7#include <stdio.h> 139#include <stdio.h>
8 140
9#include <assert.h> 141#include <assert.h>
10#include <errno.h> 142#include <errno.h>
11#include <sys/time.h> 143#include <sys/types.h>
12#include <time.h> 144#include <time.h>
13 145
14#define HAVE_EPOLL 1 146#include <signal.h>
15 147
16#ifndef HAVE_MONOTONIC 148#ifdef EV_H
17# ifdef CLOCK_MONOTONIC 149# include EV_H
18# define HAVE_MONOTONIC 1 150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
19# endif 163# endif
20#endif 164#endif
21 165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
167
168#ifndef EV_USE_MONOTONIC
169# define EV_USE_MONOTONIC 0
170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
178#endif
179
22#ifndef HAVE_SELECT 180#ifndef EV_USE_SELECT
23# define HAVE_SELECT 1 181# define EV_USE_SELECT 1
182#endif
183
184#ifndef EV_USE_POLL
185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
24#endif 189# endif
190#endif
25 191
26#ifndef HAVE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
27# define HAVE_EPOLL 0 196# define EV_USE_EPOLL 0
28#endif 197# endif
198#endif
29 199
30#ifndef HAVE_REALTIME 200#ifndef EV_USE_KQUEUE
31# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 201# define EV_USE_KQUEUE 0
202#endif
203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
32#endif 213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
241
242#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0
245#endif
246
247#ifndef CLOCK_REALTIME
248# undef EV_USE_REALTIME
249# define EV_USE_REALTIME 0
250#endif
251
252#if !EV_STAT_ENABLE
253# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0
255#endif
256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
260# endif
261#endif
262
263#if EV_USE_INOTIFY
264# include <sys/inotify.h>
265#endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
281#endif
282
283/**/
284
285/*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
33 294
34#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35#define MAX_BLOCKTIME 60. 296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
36 298
37#include "ev.h" 299#if __GNUC__ >= 4
300# define expect(expr,value) __builtin_expect ((expr),(value))
301# define noinline __attribute__ ((noinline))
302#else
303# define expect(expr,value) (expr)
304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
308#endif
38 309
310#define expect_false(expr) expect ((expr) != 0, 0)
311#define expect_true(expr) expect ((expr) != 0, 1)
312#define inline_size static inline
313
314#if EV_MINIMAL
315# define inline_speed static noinline
316#else
317# define inline_speed static inline
318#endif
319
320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
39typedef struct ev_watcher *W; 326typedef ev_watcher *W;
40typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
41typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
42 329
43static ev_tstamp now, diff; /* monotonic clock */ 330#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at
332
333#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
337#endif
338
339#ifdef _WIN32
340# include "ev_win32.c"
341#endif
342
343/*****************************************************************************/
344
345static void (*syserr_cb)(const char *msg);
346
347void
348ev_set_syserr_cb (void (*cb)(const char *msg))
349{
350 syserr_cb = cb;
351}
352
353static void noinline
354syserr (const char *msg)
355{
356 if (!msg)
357 msg = "(libev) system error";
358
359 if (syserr_cb)
360 syserr_cb (msg);
361 else
362 {
363 perror (msg);
364 abort ();
365 }
366}
367
368static void *
369ev_realloc_emul (void *ptr, long size)
370{
371 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and
373 * the single unix specification, so work around them here.
374 */
375
376 if (size)
377 return realloc (ptr, size);
378
379 free (ptr);
380 return 0;
381}
382
383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
384
385void
386ev_set_allocator (void *(*cb)(void *ptr, long size))
387{
388 alloc = cb;
389}
390
391inline_speed void *
392ev_realloc (void *ptr, long size)
393{
394 ptr = alloc (ptr, size);
395
396 if (!ptr && size)
397 {
398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
399 abort ();
400 }
401
402 return ptr;
403}
404
405#define ev_malloc(size) ev_realloc (0, (size))
406#define ev_free(ptr) ev_realloc ((ptr), 0)
407
408/*****************************************************************************/
409
410typedef struct
411{
412 WL head;
413 unsigned char events;
414 unsigned char reify;
415#if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417#endif
418} ANFD;
419
420typedef struct
421{
422 W w;
423 int events;
424} ANPENDING;
425
426#if EV_USE_INOTIFY
427typedef struct
428{
429 WL head;
430} ANFS;
431#endif
432
433#if EV_MULTIPLICITY
434
435 struct ev_loop
436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
439 #define VAR(name,decl) decl;
440 #include "ev_vars.h"
441 #undef VAR
442 };
443 #include "ev_wrap.h"
444
445 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr;
447
448#else
449
44ev_tstamp ev_now; 450 ev_tstamp ev_rt_now;
45int ev_method; 451 #define VAR(name,decl) static decl;
452 #include "ev_vars.h"
453 #undef VAR
46 454
47static int have_monotonic; /* runtime */ 455 static int ev_default_loop_ptr;
48 456
49static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 457#endif
50static void (*method_modify)(int fd, int oev, int nev);
51static void (*method_poll)(ev_tstamp timeout);
52 458
53/*****************************************************************************/ 459/*****************************************************************************/
54 460
55ev_tstamp 461ev_tstamp
56ev_time (void) 462ev_time (void)
57{ 463{
58#if HAVE_REALTIME 464#if EV_USE_REALTIME
59 struct timespec ts; 465 struct timespec ts;
60 clock_gettime (CLOCK_REALTIME, &ts); 466 clock_gettime (CLOCK_REALTIME, &ts);
61 return ts.tv_sec + ts.tv_nsec * 1e-9; 467 return ts.tv_sec + ts.tv_nsec * 1e-9;
62#else 468#else
63 struct timeval tv; 469 struct timeval tv;
64 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
65 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
66#endif 472#endif
67} 473}
68 474
69static ev_tstamp 475ev_tstamp inline_size
70get_clock (void) 476get_clock (void)
71{ 477{
72#if HAVE_MONOTONIC 478#if EV_USE_MONOTONIC
73 if (have_monotonic) 479 if (expect_true (have_monotonic))
74 { 480 {
75 struct timespec ts; 481 struct timespec ts;
76 clock_gettime (CLOCK_MONOTONIC, &ts); 482 clock_gettime (CLOCK_MONOTONIC, &ts);
77 return ts.tv_sec + ts.tv_nsec * 1e-9; 483 return ts.tv_sec + ts.tv_nsec * 1e-9;
78 } 484 }
79#endif 485#endif
80 486
81 return ev_time (); 487 return ev_time ();
82} 488}
83 489
84#define array_needsize(base,cur,cnt,init) \ 490#if EV_MULTIPLICITY
85 if ((cnt) > cur) \ 491ev_tstamp
86 { \ 492ev_now (EV_P)
87 int newcnt = cur ? cur << 1 : 16; \ 493{
88 base = realloc (base, sizeof (*base) * (newcnt)); \ 494 return ev_rt_now;
89 init (base + cur, newcnt - cur); \ 495}
90 cur = newcnt; \ 496#endif
497
498void
499ev_sleep (ev_tstamp delay)
500{
501 if (delay > 0.)
91 } 502 {
503#if EV_USE_NANOSLEEP
504 struct timespec ts;
505
506 ts.tv_sec = (time_t)delay;
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0);
510#elif defined(_WIN32)
511 Sleep ((unsigned long)(delay * 1e3));
512#else
513 struct timeval tv;
514
515 tv.tv_sec = (time_t)delay;
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
517
518 select (0, 0, 0, 0, &tv);
519#endif
520 }
521}
92 522
93/*****************************************************************************/ 523/*****************************************************************************/
94 524
525#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
526
527int inline_size
528array_nextsize (int elem, int cur, int cnt)
529{
530 int ncur = cur + 1;
531
532 do
533 ncur <<= 1;
534 while (cnt > ncur);
535
536 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
537 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
538 {
539 ncur *= elem;
540 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
541 ncur = ncur - sizeof (void *) * 4;
542 ncur /= elem;
543 }
544
545 return ncur;
546}
547
548static noinline void *
549array_realloc (int elem, void *base, int *cur, int cnt)
550{
551 *cur = array_nextsize (elem, *cur, cnt);
552 return ev_realloc (base, elem * *cur);
553}
554
555#define array_needsize(type,base,cur,cnt,init) \
556 if (expect_false ((cnt) > (cur))) \
557 { \
558 int ocur_ = (cur); \
559 (base) = (type *)array_realloc \
560 (sizeof (type), (base), &(cur), (cnt)); \
561 init ((base) + (ocur_), (cur) - ocur_); \
562 }
563
564#if 0
565#define array_slim(type,stem) \
566 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
567 { \
568 stem ## max = array_roundsize (stem ## cnt >> 1); \
569 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
570 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
571 }
572#endif
573
574#define array_free(stem, idx) \
575 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
576
577/*****************************************************************************/
578
579void noinline
580ev_feed_event (EV_P_ void *w, int revents)
581{
582 W w_ = (W)w;
583 int pri = ABSPRI (w_);
584
585 if (expect_false (w_->pending))
586 pendings [pri][w_->pending - 1].events |= revents;
587 else
588 {
589 w_->pending = ++pendingcnt [pri];
590 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
591 pendings [pri][w_->pending - 1].w = w_;
592 pendings [pri][w_->pending - 1].events = revents;
593 }
594}
595
596void inline_speed
597queue_events (EV_P_ W *events, int eventcnt, int type)
598{
599 int i;
600
601 for (i = 0; i < eventcnt; ++i)
602 ev_feed_event (EV_A_ events [i], type);
603}
604
605/*****************************************************************************/
606
607void inline_size
608anfds_init (ANFD *base, int count)
609{
610 while (count--)
611 {
612 base->head = 0;
613 base->events = EV_NONE;
614 base->reify = 0;
615
616 ++base;
617 }
618}
619
620void inline_speed
621fd_event (EV_P_ int fd, int revents)
622{
623 ANFD *anfd = anfds + fd;
624 ev_io *w;
625
626 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
627 {
628 int ev = w->events & revents;
629
630 if (ev)
631 ev_feed_event (EV_A_ (W)w, ev);
632 }
633}
634
635void
636ev_feed_fd_event (EV_P_ int fd, int revents)
637{
638 if (fd >= 0 && fd < anfdmax)
639 fd_event (EV_A_ fd, revents);
640}
641
642void inline_size
643fd_reify (EV_P)
644{
645 int i;
646
647 for (i = 0; i < fdchangecnt; ++i)
648 {
649 int fd = fdchanges [i];
650 ANFD *anfd = anfds + fd;
651 ev_io *w;
652
653 unsigned char events = 0;
654
655 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
656 events |= (unsigned char)w->events;
657
658#if EV_SELECT_IS_WINSOCKET
659 if (events)
660 {
661 unsigned long argp;
662 #ifdef EV_FD_TO_WIN32_HANDLE
663 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
664 #else
665 anfd->handle = _get_osfhandle (fd);
666 #endif
667 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
668 }
669#endif
670
671 {
672 unsigned char o_events = anfd->events;
673 unsigned char o_reify = anfd->reify;
674
675 anfd->reify = 0;
676 anfd->events = events;
677
678 if (o_events != events || o_reify & EV_IOFDSET)
679 backend_modify (EV_A_ fd, o_events, events);
680 }
681 }
682
683 fdchangecnt = 0;
684}
685
686void inline_size
687fd_change (EV_P_ int fd, int flags)
688{
689 unsigned char reify = anfds [fd].reify;
690 anfds [fd].reify |= flags;
691
692 if (expect_true (!reify))
693 {
694 ++fdchangecnt;
695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
696 fdchanges [fdchangecnt - 1] = fd;
697 }
698}
699
700void inline_speed
701fd_kill (EV_P_ int fd)
702{
703 ev_io *w;
704
705 while ((w = (ev_io *)anfds [fd].head))
706 {
707 ev_io_stop (EV_A_ w);
708 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
709 }
710}
711
712int inline_size
713fd_valid (int fd)
714{
715#ifdef _WIN32
716 return _get_osfhandle (fd) != -1;
717#else
718 return fcntl (fd, F_GETFD) != -1;
719#endif
720}
721
722/* called on EBADF to verify fds */
723static void noinline
724fd_ebadf (EV_P)
725{
726 int fd;
727
728 for (fd = 0; fd < anfdmax; ++fd)
729 if (anfds [fd].events)
730 if (!fd_valid (fd) == -1 && errno == EBADF)
731 fd_kill (EV_A_ fd);
732}
733
734/* called on ENOMEM in select/poll to kill some fds and retry */
735static void noinline
736fd_enomem (EV_P)
737{
738 int fd;
739
740 for (fd = anfdmax; fd--; )
741 if (anfds [fd].events)
742 {
743 fd_kill (EV_A_ fd);
744 return;
745 }
746}
747
748/* usually called after fork if backend needs to re-arm all fds from scratch */
749static void noinline
750fd_rearm_all (EV_P)
751{
752 int fd;
753
754 for (fd = 0; fd < anfdmax; ++fd)
755 if (anfds [fd].events)
756 {
757 anfds [fd].events = 0;
758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
759 }
760}
761
762/*****************************************************************************/
763
764/* towards the root */
765void inline_speed
766upheap (WT *heap, int k)
767{
768 WT w = heap [k];
769
770 for (;;)
771 {
772 int p = k >> 1;
773
774 /* maybe we could use a dummy element at heap [0]? */
775 if (!p || heap [p]->at <= w->at)
776 break;
777
778 heap [k] = heap [p];
779 ev_active (heap [k]) = k;
780 k = p;
781 }
782
783 heap [k] = w;
784 ev_active (heap [k]) = k;
785}
786
787/* away from the root */
788void inline_speed
789downheap (WT *heap, int N, int k)
790{
791 WT w = heap [k];
792
793 for (;;)
794 {
795 int c = k << 1;
796
797 if (c > N)
798 break;
799
800 c += c < N && heap [c]->at > heap [c + 1]->at
801 ? 1 : 0;
802
803 if (w->at <= heap [c]->at)
804 break;
805
806 heap [k] = heap [c];
807 ev_active (heap [k]) = k;
808
809 k = c;
810 }
811
812 heap [k] = w;
813 ev_active (heap [k]) = k;
814}
815
816void inline_size
817adjustheap (WT *heap, int N, int k)
818{
819 upheap (heap, k);
820 downheap (heap, N, k);
821}
822
823/*****************************************************************************/
824
95typedef struct 825typedef struct
96{ 826{
97 struct ev_io *head; 827 WL head;
98 unsigned char wev, rev; /* want, received event set */ 828 EV_ATOMIC_T gotsig;
99} ANFD;
100
101static ANFD *anfds;
102static int anfdmax;
103
104static int *fdchanges;
105static int fdchangemax, fdchangecnt;
106
107static void
108anfds_init (ANFD *base, int count)
109{
110 while (count--)
111 {
112 base->head = 0;
113 base->wev = base->rev = EV_NONE;
114 ++base;
115 }
116}
117
118typedef struct
119{
120 W w;
121 int events;
122} ANPENDING;
123
124static ANPENDING *pendings;
125static int pendingmax, pendingcnt;
126
127static void
128event (W w, int events)
129{
130 w->pending = ++pendingcnt;
131 array_needsize (pendings, pendingmax, pendingcnt, );
132 pendings [pendingcnt - 1].w = w;
133 pendings [pendingcnt - 1].events = events;
134}
135
136static void
137fd_event (int fd, int events)
138{
139 ANFD *anfd = anfds + fd;
140 struct ev_io *w;
141
142 for (w = anfd->head; w; w = w->next)
143 {
144 int ev = w->events & events;
145
146 if (ev)
147 event ((W)w, ev);
148 }
149}
150
151static void
152queue_events (W *events, int eventcnt, int type)
153{
154 int i;
155
156 for (i = 0; i < eventcnt; ++i)
157 event (events [i], type);
158}
159
160/*****************************************************************************/
161
162static struct ev_timer **timers;
163static int timermax, timercnt;
164
165static struct ev_periodic **periodics;
166static int periodicmax, periodiccnt;
167
168static void
169upheap (WT *timers, int k)
170{
171 WT w = timers [k];
172
173 while (k && timers [k >> 1]->at > w->at)
174 {
175 timers [k] = timers [k >> 1];
176 timers [k]->active = k + 1;
177 k >>= 1;
178 }
179
180 timers [k] = w;
181 timers [k]->active = k + 1;
182
183}
184
185static void
186downheap (WT *timers, int N, int k)
187{
188 WT w = timers [k];
189
190 while (k < (N >> 1))
191 {
192 int j = k << 1;
193
194 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
195 ++j;
196
197 if (w->at <= timers [j]->at)
198 break;
199
200 timers [k] = timers [j];
201 timers [k]->active = k + 1;
202 k = j;
203 }
204
205 timers [k] = w;
206 timers [k]->active = k + 1;
207}
208
209/*****************************************************************************/
210
211typedef struct
212{
213 struct ev_signal *head;
214 sig_atomic_t gotsig;
215} ANSIG; 829} ANSIG;
216 830
217static ANSIG *signals; 831static ANSIG *signals;
218static int signalmax; 832static int signalmax;
219 833
220static int sigpipe [2]; 834static EV_ATOMIC_T gotsig;
221static sig_atomic_t gotsig;
222static struct ev_io sigev;
223 835
224static void 836void inline_size
225signals_init (ANSIG *base, int count) 837signals_init (ANSIG *base, int count)
226{ 838{
227 while (count--) 839 while (count--)
228 { 840 {
229 base->head = 0; 841 base->head = 0;
230 base->gotsig = 0; 842 base->gotsig = 0;
843
231 ++base; 844 ++base;
232 } 845 }
233} 846}
234 847
848/*****************************************************************************/
849
850void inline_speed
851fd_intern (int fd)
852{
853#ifdef _WIN32
854 int arg = 1;
855 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
856#else
857 fcntl (fd, F_SETFD, FD_CLOEXEC);
858 fcntl (fd, F_SETFL, O_NONBLOCK);
859#endif
860}
861
862static void noinline
863evpipe_init (EV_P)
864{
865 if (!ev_is_active (&pipeev))
866 {
867#if EV_USE_EVENTFD
868 if ((evfd = eventfd (0, 0)) >= 0)
869 {
870 evpipe [0] = -1;
871 fd_intern (evfd);
872 ev_io_set (&pipeev, evfd, EV_READ);
873 }
874 else
875#endif
876 {
877 while (pipe (evpipe))
878 syserr ("(libev) error creating signal/async pipe");
879
880 fd_intern (evpipe [0]);
881 fd_intern (evpipe [1]);
882 ev_io_set (&pipeev, evpipe [0], EV_READ);
883 }
884
885 ev_io_start (EV_A_ &pipeev);
886 ev_unref (EV_A); /* watcher should not keep loop alive */
887 }
888}
889
890void inline_size
891evpipe_write (EV_P_ EV_ATOMIC_T *flag)
892{
893 if (!*flag)
894 {
895 int old_errno = errno; /* save errno because write might clobber it */
896
897 *flag = 1;
898
899#if EV_USE_EVENTFD
900 if (evfd >= 0)
901 {
902 uint64_t counter = 1;
903 write (evfd, &counter, sizeof (uint64_t));
904 }
905 else
906#endif
907 write (evpipe [1], &old_errno, 1);
908
909 errno = old_errno;
910 }
911}
912
235static void 913static void
914pipecb (EV_P_ ev_io *iow, int revents)
915{
916#if EV_USE_EVENTFD
917 if (evfd >= 0)
918 {
919 uint64_t counter;
920 read (evfd, &counter, sizeof (uint64_t));
921 }
922 else
923#endif
924 {
925 char dummy;
926 read (evpipe [0], &dummy, 1);
927 }
928
929 if (gotsig && ev_is_default_loop (EV_A))
930 {
931 int signum;
932 gotsig = 0;
933
934 for (signum = signalmax; signum--; )
935 if (signals [signum].gotsig)
936 ev_feed_signal_event (EV_A_ signum + 1);
937 }
938
939#if EV_ASYNC_ENABLE
940 if (gotasync)
941 {
942 int i;
943 gotasync = 0;
944
945 for (i = asynccnt; i--; )
946 if (asyncs [i]->sent)
947 {
948 asyncs [i]->sent = 0;
949 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
950 }
951 }
952#endif
953}
954
955/*****************************************************************************/
956
957static void
236sighandler (int signum) 958ev_sighandler (int signum)
237{ 959{
960#if EV_MULTIPLICITY
961 struct ev_loop *loop = &default_loop_struct;
962#endif
963
964#if _WIN32
965 signal (signum, ev_sighandler);
966#endif
967
238 signals [signum - 1].gotsig = 1; 968 signals [signum - 1].gotsig = 1;
969 evpipe_write (EV_A_ &gotsig);
970}
239 971
240 if (!gotsig) 972void noinline
973ev_feed_signal_event (EV_P_ int signum)
974{
975 WL w;
976
977#if EV_MULTIPLICITY
978 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
979#endif
980
981 --signum;
982
983 if (signum < 0 || signum >= signalmax)
984 return;
985
986 signals [signum].gotsig = 0;
987
988 for (w = signals [signum].head; w; w = w->next)
989 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
990}
991
992/*****************************************************************************/
993
994static WL childs [EV_PID_HASHSIZE];
995
996#ifndef _WIN32
997
998static ev_signal childev;
999
1000#ifndef WIFCONTINUED
1001# define WIFCONTINUED(status) 0
1002#endif
1003
1004void inline_speed
1005child_reap (EV_P_ int chain, int pid, int status)
1006{
1007 ev_child *w;
1008 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1009
1010 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1011 {
1012 if ((w->pid == pid || !w->pid)
1013 && (!traced || (w->flags & 1)))
1014 {
1015 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1016 w->rpid = pid;
1017 w->rstatus = status;
1018 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1019 }
1020 }
1021}
1022
1023#ifndef WCONTINUED
1024# define WCONTINUED 0
1025#endif
1026
1027static void
1028childcb (EV_P_ ev_signal *sw, int revents)
1029{
1030 int pid, status;
1031
1032 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1033 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1034 if (!WCONTINUED
1035 || errno != EINVAL
1036 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1037 return;
1038
1039 /* make sure we are called again until all children have been reaped */
1040 /* we need to do it this way so that the callback gets called before we continue */
1041 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1042
1043 child_reap (EV_A_ pid, pid, status);
1044 if (EV_PID_HASHSIZE > 1)
1045 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1046}
1047
1048#endif
1049
1050/*****************************************************************************/
1051
1052#if EV_USE_PORT
1053# include "ev_port.c"
1054#endif
1055#if EV_USE_KQUEUE
1056# include "ev_kqueue.c"
1057#endif
1058#if EV_USE_EPOLL
1059# include "ev_epoll.c"
1060#endif
1061#if EV_USE_POLL
1062# include "ev_poll.c"
1063#endif
1064#if EV_USE_SELECT
1065# include "ev_select.c"
1066#endif
1067
1068int
1069ev_version_major (void)
1070{
1071 return EV_VERSION_MAJOR;
1072}
1073
1074int
1075ev_version_minor (void)
1076{
1077 return EV_VERSION_MINOR;
1078}
1079
1080/* return true if we are running with elevated privileges and should ignore env variables */
1081int inline_size
1082enable_secure (void)
1083{
1084#ifdef _WIN32
1085 return 0;
1086#else
1087 return getuid () != geteuid ()
1088 || getgid () != getegid ();
1089#endif
1090}
1091
1092unsigned int
1093ev_supported_backends (void)
1094{
1095 unsigned int flags = 0;
1096
1097 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1098 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1099 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1100 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1101 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1102
1103 return flags;
1104}
1105
1106unsigned int
1107ev_recommended_backends (void)
1108{
1109 unsigned int flags = ev_supported_backends ();
1110
1111#ifndef __NetBSD__
1112 /* kqueue is borked on everything but netbsd apparently */
1113 /* it usually doesn't work correctly on anything but sockets and pipes */
1114 flags &= ~EVBACKEND_KQUEUE;
1115#endif
1116#ifdef __APPLE__
1117 // flags &= ~EVBACKEND_KQUEUE; for documentation
1118 flags &= ~EVBACKEND_POLL;
1119#endif
1120
1121 return flags;
1122}
1123
1124unsigned int
1125ev_embeddable_backends (void)
1126{
1127 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1128
1129 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1130 /* please fix it and tell me how to detect the fix */
1131 flags &= ~EVBACKEND_EPOLL;
1132
1133 return flags;
1134}
1135
1136unsigned int
1137ev_backend (EV_P)
1138{
1139 return backend;
1140}
1141
1142unsigned int
1143ev_loop_count (EV_P)
1144{
1145 return loop_count;
1146}
1147
1148void
1149ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1150{
1151 io_blocktime = interval;
1152}
1153
1154void
1155ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1156{
1157 timeout_blocktime = interval;
1158}
1159
1160static void noinline
1161loop_init (EV_P_ unsigned int flags)
1162{
1163 if (!backend)
1164 {
1165#if EV_USE_MONOTONIC
241 { 1166 {
1167 struct timespec ts;
1168 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1169 have_monotonic = 1;
1170 }
1171#endif
1172
1173 ev_rt_now = ev_time ();
1174 mn_now = get_clock ();
1175 now_floor = mn_now;
1176 rtmn_diff = ev_rt_now - mn_now;
1177
1178 io_blocktime = 0.;
1179 timeout_blocktime = 0.;
1180 backend = 0;
1181 backend_fd = -1;
1182 gotasync = 0;
1183#if EV_USE_INOTIFY
1184 fs_fd = -2;
1185#endif
1186
1187 /* pid check not overridable via env */
1188#ifndef _WIN32
1189 if (flags & EVFLAG_FORKCHECK)
1190 curpid = getpid ();
1191#endif
1192
1193 if (!(flags & EVFLAG_NOENV)
1194 && !enable_secure ()
1195 && getenv ("LIBEV_FLAGS"))
1196 flags = atoi (getenv ("LIBEV_FLAGS"));
1197
1198 if (!(flags & 0x0000ffffU))
1199 flags |= ev_recommended_backends ();
1200
1201#if EV_USE_PORT
1202 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1203#endif
1204#if EV_USE_KQUEUE
1205 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1206#endif
1207#if EV_USE_EPOLL
1208 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1209#endif
1210#if EV_USE_POLL
1211 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1212#endif
1213#if EV_USE_SELECT
1214 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1215#endif
1216
1217 ev_init (&pipeev, pipecb);
1218 ev_set_priority (&pipeev, EV_MAXPRI);
1219 }
1220}
1221
1222static void noinline
1223loop_destroy (EV_P)
1224{
1225 int i;
1226
1227 if (ev_is_active (&pipeev))
1228 {
1229 ev_ref (EV_A); /* signal watcher */
1230 ev_io_stop (EV_A_ &pipeev);
1231
1232#if EV_USE_EVENTFD
1233 if (evfd >= 0)
1234 close (evfd);
1235#endif
1236
1237 if (evpipe [0] >= 0)
1238 {
1239 close (evpipe [0]);
1240 close (evpipe [1]);
1241 }
1242 }
1243
1244#if EV_USE_INOTIFY
1245 if (fs_fd >= 0)
1246 close (fs_fd);
1247#endif
1248
1249 if (backend_fd >= 0)
1250 close (backend_fd);
1251
1252#if EV_USE_PORT
1253 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1254#endif
1255#if EV_USE_KQUEUE
1256 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1257#endif
1258#if EV_USE_EPOLL
1259 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1260#endif
1261#if EV_USE_POLL
1262 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1263#endif
1264#if EV_USE_SELECT
1265 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1266#endif
1267
1268 for (i = NUMPRI; i--; )
1269 {
1270 array_free (pending, [i]);
1271#if EV_IDLE_ENABLE
1272 array_free (idle, [i]);
1273#endif
1274 }
1275
1276 ev_free (anfds); anfdmax = 0;
1277
1278 /* have to use the microsoft-never-gets-it-right macro */
1279 array_free (fdchange, EMPTY);
1280 array_free (timer, EMPTY);
1281#if EV_PERIODIC_ENABLE
1282 array_free (periodic, EMPTY);
1283#endif
1284#if EV_FORK_ENABLE
1285 array_free (fork, EMPTY);
1286#endif
1287 array_free (prepare, EMPTY);
1288 array_free (check, EMPTY);
1289#if EV_ASYNC_ENABLE
1290 array_free (async, EMPTY);
1291#endif
1292
1293 backend = 0;
1294}
1295
1296#if EV_USE_INOTIFY
1297void inline_size infy_fork (EV_P);
1298#endif
1299
1300void inline_size
1301loop_fork (EV_P)
1302{
1303#if EV_USE_PORT
1304 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1305#endif
1306#if EV_USE_KQUEUE
1307 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1308#endif
1309#if EV_USE_EPOLL
1310 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1311#endif
1312#if EV_USE_INOTIFY
1313 infy_fork (EV_A);
1314#endif
1315
1316 if (ev_is_active (&pipeev))
1317 {
1318 /* this "locks" the handlers against writing to the pipe */
1319 /* while we modify the fd vars */
242 gotsig = 1; 1320 gotsig = 1;
243 write (sigpipe [1], &gotsig, 1); 1321#if EV_ASYNC_ENABLE
1322 gotasync = 1;
1323#endif
1324
1325 ev_ref (EV_A);
1326 ev_io_stop (EV_A_ &pipeev);
1327
1328#if EV_USE_EVENTFD
1329 if (evfd >= 0)
1330 close (evfd);
1331#endif
1332
1333 if (evpipe [0] >= 0)
1334 {
1335 close (evpipe [0]);
1336 close (evpipe [1]);
1337 }
1338
1339 evpipe_init (EV_A);
1340 /* now iterate over everything, in case we missed something */
1341 pipecb (EV_A_ &pipeev, EV_READ);
1342 }
1343
1344 postfork = 0;
1345}
1346
1347#if EV_MULTIPLICITY
1348struct ev_loop *
1349ev_loop_new (unsigned int flags)
1350{
1351 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1352
1353 memset (loop, 0, sizeof (struct ev_loop));
1354
1355 loop_init (EV_A_ flags);
1356
1357 if (ev_backend (EV_A))
1358 return loop;
1359
1360 return 0;
1361}
1362
1363void
1364ev_loop_destroy (EV_P)
1365{
1366 loop_destroy (EV_A);
1367 ev_free (loop);
1368}
1369
1370void
1371ev_loop_fork (EV_P)
1372{
1373 postfork = 1; /* must be in line with ev_default_fork */
1374}
1375#endif
1376
1377#if EV_MULTIPLICITY
1378struct ev_loop *
1379ev_default_loop_init (unsigned int flags)
1380#else
1381int
1382ev_default_loop (unsigned int flags)
1383#endif
1384{
1385 if (!ev_default_loop_ptr)
244 } 1386 {
245} 1387#if EV_MULTIPLICITY
1388 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1389#else
1390 ev_default_loop_ptr = 1;
1391#endif
246 1392
247static void 1393 loop_init (EV_A_ flags);
248sigcb (struct ev_io *iow, int revents) 1394
1395 if (ev_backend (EV_A))
1396 {
1397#ifndef _WIN32
1398 ev_signal_init (&childev, childcb, SIGCHLD);
1399 ev_set_priority (&childev, EV_MAXPRI);
1400 ev_signal_start (EV_A_ &childev);
1401 ev_unref (EV_A); /* child watcher should not keep loop alive */
1402#endif
1403 }
1404 else
1405 ev_default_loop_ptr = 0;
1406 }
1407
1408 return ev_default_loop_ptr;
1409}
1410
1411void
1412ev_default_destroy (void)
249{ 1413{
250 struct ev_signal *w; 1414#if EV_MULTIPLICITY
1415 struct ev_loop *loop = ev_default_loop_ptr;
1416#endif
1417
1418#ifndef _WIN32
1419 ev_ref (EV_A); /* child watcher */
1420 ev_signal_stop (EV_A_ &childev);
1421#endif
1422
1423 loop_destroy (EV_A);
1424}
1425
1426void
1427ev_default_fork (void)
1428{
1429#if EV_MULTIPLICITY
1430 struct ev_loop *loop = ev_default_loop_ptr;
1431#endif
1432
1433 if (backend)
1434 postfork = 1; /* must be in line with ev_loop_fork */
1435}
1436
1437/*****************************************************************************/
1438
1439void
1440ev_invoke (EV_P_ void *w, int revents)
1441{
1442 EV_CB_INVOKE ((W)w, revents);
1443}
1444
1445void inline_speed
1446call_pending (EV_P)
1447{
251 int sig; 1448 int pri;
252 1449
253 gotsig = 0; 1450 for (pri = NUMPRI; pri--; )
254 read (sigpipe [0], &revents, 1); 1451 while (pendingcnt [pri])
255
256 for (sig = signalmax; sig--; )
257 if (signals [sig].gotsig)
258 { 1452 {
259 signals [sig].gotsig = 0; 1453 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
260 1454
261 for (w = signals [sig].head; w; w = w->next) 1455 if (expect_true (p->w))
262 event ((W)w, EV_SIGNAL); 1456 {
1457 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1458
1459 p->w->pending = 0;
1460 EV_CB_INVOKE (p->w, p->events);
1461 }
263 } 1462 }
264} 1463}
265 1464
266static void 1465#if EV_IDLE_ENABLE
267siginit (void) 1466void inline_size
1467idle_reify (EV_P)
268{ 1468{
269 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 1469 if (expect_false (idleall))
270 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
271
272 /* rather than sort out wether we really need nb, set it */
273 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
274 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
275
276 evio_set (&sigev, sigpipe [0], EV_READ);
277 evio_start (&sigev);
278}
279
280/*****************************************************************************/
281
282static struct ev_idle **idles;
283static int idlemax, idlecnt;
284
285static struct ev_check **checks;
286static int checkmax, checkcnt;
287
288/*****************************************************************************/
289
290#if HAVE_EPOLL
291# include "ev_epoll.c"
292#endif
293#if HAVE_SELECT
294# include "ev_select.c"
295#endif
296
297int ev_init (int flags)
298{
299#if HAVE_MONOTONIC
300 {
301 struct timespec ts;
302 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
303 have_monotonic = 1;
304 }
305#endif
306
307 ev_now = ev_time ();
308 now = get_clock ();
309 diff = ev_now - now;
310
311 if (pipe (sigpipe))
312 return 0;
313
314 ev_method = EVMETHOD_NONE;
315#if HAVE_EPOLL
316 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
317#endif
318#if HAVE_SELECT
319 if (ev_method == EVMETHOD_NONE) select_init (flags);
320#endif
321
322 if (ev_method)
323 {
324 evw_init (&sigev, sigcb);
325 siginit ();
326 } 1470 {
1471 int pri;
327 1472
328 return ev_method; 1473 for (pri = NUMPRI; pri--; )
329}
330
331/*****************************************************************************/
332
333void ev_prefork (void)
334{
335 /* nop */
336}
337
338void ev_postfork_parent (void)
339{
340 /* nop */
341}
342
343void ev_postfork_child (void)
344{
345#if HAVE_EPOLL
346 if (ev_method == EVMETHOD_EPOLL)
347 epoll_postfork_child ();
348#endif
349
350 evio_stop (&sigev);
351 close (sigpipe [0]);
352 close (sigpipe [1]);
353 pipe (sigpipe);
354 siginit ();
355}
356
357/*****************************************************************************/
358
359static void
360fd_reify (void)
361{
362 int i;
363
364 for (i = 0; i < fdchangecnt; ++i)
365 {
366 int fd = fdchanges [i];
367 ANFD *anfd = anfds + fd;
368 struct ev_io *w;
369
370 int wev = 0;
371
372 for (w = anfd->head; w; w = w->next)
373 wev |= w->events;
374
375 if (anfd->wev != wev)
376 { 1474 {
377 method_modify (fd, anfd->wev, wev); 1475 if (pendingcnt [pri])
378 anfd->wev = wev; 1476 break;
1477
1478 if (idlecnt [pri])
1479 {
1480 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1481 break;
1482 }
379 } 1483 }
380 } 1484 }
381
382 fdchangecnt = 0;
383} 1485}
1486#endif
384 1487
385static void 1488void inline_size
386call_pending ()
387{
388 int i;
389
390 for (i = 0; i < pendingcnt; ++i)
391 {
392 ANPENDING *p = pendings + i;
393
394 if (p->w)
395 {
396 p->w->pending = 0;
397 p->w->cb (p->w, p->events);
398 }
399 }
400
401 pendingcnt = 0;
402}
403
404static void
405timers_reify () 1489timers_reify (EV_P)
406{ 1490{
407 while (timercnt && timers [0]->at <= now) 1491 while (timercnt && ev_at (timers [1]) <= mn_now)
408 { 1492 {
409 struct ev_timer *w = timers [0]; 1493 ev_timer *w = (ev_timer *)timers [1];
1494
1495 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
410 1496
411 /* first reschedule or stop timer */ 1497 /* first reschedule or stop timer */
412 if (w->repeat) 1498 if (w->repeat)
413 { 1499 {
414 w->at = now + w->repeat; 1500 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
415 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1501
1502 ev_at (w) += w->repeat;
1503 if (ev_at (w) < mn_now)
1504 ev_at (w) = mn_now;
1505
416 downheap ((WT *)timers, timercnt, 0); 1506 downheap (timers, timercnt, 1);
417 } 1507 }
418 else 1508 else
419 evtimer_stop (w); /* nonrepeating: stop timer */ 1509 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
420 1510
421 event ((W)w, EV_TIMEOUT); 1511 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
422 } 1512 }
423} 1513}
424 1514
425static void 1515#if EV_PERIODIC_ENABLE
1516void inline_size
426periodics_reify () 1517periodics_reify (EV_P)
427{ 1518{
428 while (periodiccnt && periodics [0]->at <= ev_now) 1519 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
429 { 1520 {
430 struct ev_periodic *w = periodics [0]; 1521 ev_periodic *w = (ev_periodic *)periodics [1];
1522
1523 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
431 1524
432 /* first reschedule or stop timer */ 1525 /* first reschedule or stop timer */
433 if (w->interval) 1526 if (w->reschedule_cb)
434 { 1527 {
435 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1528 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
436 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1529 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
437 downheap ((WT *)periodics, periodiccnt, 0); 1530 downheap (periodics, periodiccnt, 1);
1531 }
1532 else if (w->interval)
1533 {
1534 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1535 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1536 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1537 downheap (periodics, periodiccnt, 1);
438 } 1538 }
439 else 1539 else
440 evperiodic_stop (w); /* nonrepeating: stop timer */ 1540 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
441 1541
442 event ((W)w, EV_TIMEOUT); 1542 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
443 } 1543 }
444} 1544}
445 1545
446static void 1546static void noinline
447periodics_reschedule (ev_tstamp diff) 1547periodics_reschedule (EV_P)
448{ 1548{
449 int i; 1549 int i;
450 1550
451 /* adjust periodics after time jump */ 1551 /* adjust periodics after time jump */
452 for (i = 0; i < periodiccnt; ++i) 1552 for (i = 1; i <= periodiccnt; ++i)
453 { 1553 {
454 struct ev_periodic *w = periodics [i]; 1554 ev_periodic *w = (ev_periodic *)periodics [i];
455 1555
1556 if (w->reschedule_cb)
1557 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
456 if (w->interval) 1558 else if (w->interval)
1559 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1560 }
1561
1562 /* now rebuild the heap */
1563 for (i = periodiccnt >> 1; i--; )
1564 downheap (periodics, periodiccnt, i);
1565}
1566#endif
1567
1568void inline_speed
1569time_update (EV_P_ ev_tstamp max_block)
1570{
1571 int i;
1572
1573#if EV_USE_MONOTONIC
1574 if (expect_true (have_monotonic))
1575 {
1576 ev_tstamp odiff = rtmn_diff;
1577
1578 mn_now = get_clock ();
1579
1580 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1581 /* interpolate in the meantime */
1582 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
457 { 1583 {
458 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1584 ev_rt_now = rtmn_diff + mn_now;
459 1585 return;
460 if (fabs (diff) >= 1e-4)
461 {
462 evperiodic_stop (w);
463 evperiodic_start (w);
464
465 i = 0; /* restart loop, inefficient, but time jumps should be rare */
466 }
467 } 1586 }
468 }
469}
470 1587
471static void 1588 now_floor = mn_now;
472time_update ()
473{
474 int i;
475
476 ev_now = ev_time (); 1589 ev_rt_now = ev_time ();
477 1590
478 if (have_monotonic)
479 {
480 ev_tstamp odiff = diff;
481
482 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1591 /* loop a few times, before making important decisions.
1592 * on the choice of "4": one iteration isn't enough,
1593 * in case we get preempted during the calls to
1594 * ev_time and get_clock. a second call is almost guaranteed
1595 * to succeed in that case, though. and looping a few more times
1596 * doesn't hurt either as we only do this on time-jumps or
1597 * in the unlikely event of having been preempted here.
1598 */
1599 for (i = 4; --i; )
483 { 1600 {
484 now = get_clock ();
485 diff = ev_now - now; 1601 rtmn_diff = ev_rt_now - mn_now;
486 1602
487 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1603 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
488 return; /* all is well */ 1604 return; /* all is well */
489 1605
490 ev_now = ev_time (); 1606 ev_rt_now = ev_time ();
1607 mn_now = get_clock ();
1608 now_floor = mn_now;
491 } 1609 }
492 1610
1611# if EV_PERIODIC_ENABLE
493 periodics_reschedule (diff - odiff); 1612 periodics_reschedule (EV_A);
1613# endif
494 /* no timer adjustment, as the monotonic clock doesn't jump */ 1614 /* no timer adjustment, as the monotonic clock doesn't jump */
1615 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
495 } 1616 }
496 else 1617 else
1618#endif
497 { 1619 {
498 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1620 ev_rt_now = ev_time ();
1621
1622 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
499 { 1623 {
1624#if EV_PERIODIC_ENABLE
500 periodics_reschedule (ev_now - now); 1625 periodics_reschedule (EV_A);
501 1626#endif
502 /* adjust timers. this is easy, as the offset is the same for all */ 1627 /* adjust timers. this is easy, as the offset is the same for all of them */
503 for (i = 0; i < timercnt; ++i) 1628 for (i = 1; i <= timercnt; ++i)
504 timers [i]->at += diff; 1629 ev_at (timers [i]) += ev_rt_now - mn_now;
505 } 1630 }
506 1631
507 now = ev_now; 1632 mn_now = ev_rt_now;
508 }
509}
510
511int ev_loop_done;
512
513void ev_loop (int flags)
514{
515 double block;
516 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
517
518 if (checkcnt)
519 { 1633 }
520 queue_events ((W *)checks, checkcnt, EV_CHECK); 1634}
521 call_pending (); 1635
522 } 1636void
1637ev_ref (EV_P)
1638{
1639 ++activecnt;
1640}
1641
1642void
1643ev_unref (EV_P)
1644{
1645 --activecnt;
1646}
1647
1648static int loop_done;
1649
1650void
1651ev_loop (EV_P_ int flags)
1652{
1653 loop_done = EVUNLOOP_CANCEL;
1654
1655 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
523 1656
524 do 1657 do
525 { 1658 {
1659#ifndef _WIN32
1660 if (expect_false (curpid)) /* penalise the forking check even more */
1661 if (expect_false (getpid () != curpid))
1662 {
1663 curpid = getpid ();
1664 postfork = 1;
1665 }
1666#endif
1667
1668#if EV_FORK_ENABLE
1669 /* we might have forked, so queue fork handlers */
1670 if (expect_false (postfork))
1671 if (forkcnt)
1672 {
1673 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1674 call_pending (EV_A);
1675 }
1676#endif
1677
1678 /* queue prepare watchers (and execute them) */
1679 if (expect_false (preparecnt))
1680 {
1681 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1682 call_pending (EV_A);
1683 }
1684
1685 if (expect_false (!activecnt))
1686 break;
1687
1688 /* we might have forked, so reify kernel state if necessary */
1689 if (expect_false (postfork))
1690 loop_fork (EV_A);
1691
526 /* update fd-related kernel structures */ 1692 /* update fd-related kernel structures */
527 fd_reify (); 1693 fd_reify (EV_A);
528 1694
529 /* calculate blocking time */ 1695 /* calculate blocking time */
1696 {
1697 ev_tstamp waittime = 0.;
1698 ev_tstamp sleeptime = 0.;
530 1699
531 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1700 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
532 ev_now = ev_time ();
533
534 if (flags & EVLOOP_NONBLOCK || idlecnt)
535 block = 0.;
536 else
537 { 1701 {
1702 /* update time to cancel out callback processing overhead */
1703 time_update (EV_A_ 1e100);
1704
538 block = MAX_BLOCKTIME; 1705 waittime = MAX_BLOCKTIME;
539 1706
540 if (timercnt) 1707 if (timercnt)
541 { 1708 {
542 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1709 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
543 if (block > to) block = to; 1710 if (waittime > to) waittime = to;
544 } 1711 }
545 1712
1713#if EV_PERIODIC_ENABLE
546 if (periodiccnt) 1714 if (periodiccnt)
547 { 1715 {
548 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1716 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
549 if (block > to) block = to; 1717 if (waittime > to) waittime = to;
550 } 1718 }
1719#endif
551 1720
552 if (block < 0.) block = 0.; 1721 if (expect_false (waittime < timeout_blocktime))
1722 waittime = timeout_blocktime;
1723
1724 sleeptime = waittime - backend_fudge;
1725
1726 if (expect_true (sleeptime > io_blocktime))
1727 sleeptime = io_blocktime;
1728
1729 if (sleeptime)
1730 {
1731 ev_sleep (sleeptime);
1732 waittime -= sleeptime;
1733 }
553 } 1734 }
554 1735
555 method_poll (block); 1736 ++loop_count;
1737 backend_poll (EV_A_ waittime);
556 1738
557 /* update ev_now, do magic */ 1739 /* update ev_rt_now, do magic */
558 time_update (); 1740 time_update (EV_A_ waittime + sleeptime);
1741 }
559 1742
560 /* queue pending timers and reschedule them */ 1743 /* queue pending timers and reschedule them */
1744 timers_reify (EV_A); /* relative timers called last */
1745#if EV_PERIODIC_ENABLE
561 periodics_reify (); /* absolute timers first */ 1746 periodics_reify (EV_A); /* absolute timers called first */
562 timers_reify (); /* relative timers second */ 1747#endif
563 1748
1749#if EV_IDLE_ENABLE
564 /* queue idle watchers unless io or timers are pending */ 1750 /* queue idle watchers unless other events are pending */
565 if (!pendingcnt) 1751 idle_reify (EV_A);
566 queue_events ((W *)idles, idlecnt, EV_IDLE); 1752#endif
567 1753
568 /* queue check and possibly idle watchers */ 1754 /* queue check watchers, to be executed first */
1755 if (expect_false (checkcnt))
569 queue_events ((W *)checks, checkcnt, EV_CHECK); 1756 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
570 1757
571 call_pending (); 1758 call_pending (EV_A);
572 } 1759 }
573 while (!ev_loop_done); 1760 while (expect_true (
1761 activecnt
1762 && !loop_done
1763 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1764 ));
574 1765
575 if (ev_loop_done != 2) 1766 if (loop_done == EVUNLOOP_ONE)
1767 loop_done = EVUNLOOP_CANCEL;
1768}
1769
1770void
1771ev_unloop (EV_P_ int how)
1772{
576 ev_loop_done = 0; 1773 loop_done = how;
577} 1774}
578 1775
579/*****************************************************************************/ 1776/*****************************************************************************/
580 1777
581static void 1778void inline_size
582wlist_add (WL *head, WL elem) 1779wlist_add (WL *head, WL elem)
583{ 1780{
584 elem->next = *head; 1781 elem->next = *head;
585 *head = elem; 1782 *head = elem;
586} 1783}
587 1784
588static void 1785void inline_size
589wlist_del (WL *head, WL elem) 1786wlist_del (WL *head, WL elem)
590{ 1787{
591 while (*head) 1788 while (*head)
592 { 1789 {
593 if (*head == elem) 1790 if (*head == elem)
… …
598 1795
599 head = &(*head)->next; 1796 head = &(*head)->next;
600 } 1797 }
601} 1798}
602 1799
603static void 1800void inline_speed
1801clear_pending (EV_P_ W w)
1802{
1803 if (w->pending)
1804 {
1805 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1806 w->pending = 0;
1807 }
1808}
1809
1810int
1811ev_clear_pending (EV_P_ void *w)
1812{
1813 W w_ = (W)w;
1814 int pending = w_->pending;
1815
1816 if (expect_true (pending))
1817 {
1818 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1819 w_->pending = 0;
1820 p->w = 0;
1821 return p->events;
1822 }
1823 else
1824 return 0;
1825}
1826
1827void inline_size
1828pri_adjust (EV_P_ W w)
1829{
1830 int pri = w->priority;
1831 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1832 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1833 w->priority = pri;
1834}
1835
1836void inline_speed
604ev_start (W w, int active) 1837ev_start (EV_P_ W w, int active)
605{ 1838{
606 w->pending = 0; 1839 pri_adjust (EV_A_ w);
607 w->active = active; 1840 w->active = active;
1841 ev_ref (EV_A);
608} 1842}
609 1843
610static void 1844void inline_size
611ev_stop (W w) 1845ev_stop (EV_P_ W w)
612{ 1846{
613 if (w->pending) 1847 ev_unref (EV_A);
614 pendings [w->pending - 1].w = 0;
615
616 w->active = 0; 1848 w->active = 0;
617} 1849}
618 1850
619/*****************************************************************************/ 1851/*****************************************************************************/
620 1852
621void 1853void noinline
622evio_start (struct ev_io *w) 1854ev_io_start (EV_P_ ev_io *w)
623{ 1855{
624 if (ev_is_active (w))
625 return;
626
627 int fd = w->fd; 1856 int fd = w->fd;
628 1857
1858 if (expect_false (ev_is_active (w)))
1859 return;
1860
1861 assert (("ev_io_start called with negative fd", fd >= 0));
1862
629 ev_start ((W)w, 1); 1863 ev_start (EV_A_ (W)w, 1);
630 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1864 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
631 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1865 wlist_add (&anfds[fd].head, (WL)w);
632 1866
633 ++fdchangecnt; 1867 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
634 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1868 w->events &= ~EV_IOFDSET;
635 fdchanges [fdchangecnt - 1] = fd;
636} 1869}
637 1870
638void 1871void noinline
639evio_stop (struct ev_io *w) 1872ev_io_stop (EV_P_ ev_io *w)
640{ 1873{
1874 clear_pending (EV_A_ (W)w);
641 if (!ev_is_active (w)) 1875 if (expect_false (!ev_is_active (w)))
642 return; 1876 return;
643 1877
1878 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1879
644 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1880 wlist_del (&anfds[w->fd].head, (WL)w);
645 ev_stop ((W)w); 1881 ev_stop (EV_A_ (W)w);
646 1882
647 ++fdchangecnt; 1883 fd_change (EV_A_ w->fd, 1);
648 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
649 fdchanges [fdchangecnt - 1] = w->fd;
650} 1884}
651 1885
652 1886void noinline
653void
654evtimer_start (struct ev_timer *w) 1887ev_timer_start (EV_P_ ev_timer *w)
655{ 1888{
656 if (ev_is_active (w)) 1889 if (expect_false (ev_is_active (w)))
657 return; 1890 return;
658 1891
659 w->at += now; 1892 ev_at (w) += mn_now;
660 1893
661 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1894 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
662 1895
663 ev_start ((W)w, ++timercnt); 1896 ev_start (EV_A_ (W)w, ++timercnt);
664 array_needsize (timers, timermax, timercnt, ); 1897 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
665 timers [timercnt - 1] = w; 1898 timers [timercnt] = (WT)w;
666 upheap ((WT *)timers, timercnt - 1); 1899 upheap (timers, timercnt);
667}
668 1900
669void 1901 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1902}
1903
1904void noinline
670evtimer_stop (struct ev_timer *w) 1905ev_timer_stop (EV_P_ ev_timer *w)
671{ 1906{
1907 clear_pending (EV_A_ (W)w);
672 if (!ev_is_active (w)) 1908 if (expect_false (!ev_is_active (w)))
673 return; 1909 return;
674 1910
675 if (w->active < timercnt--) 1911 {
1912 int active = ev_active (w);
1913
1914 assert (("internal timer heap corruption", timers [active] == (WT)w));
1915
1916 if (expect_true (active < timercnt))
676 { 1917 {
677 timers [w->active - 1] = timers [timercnt]; 1918 timers [active] = timers [timercnt];
678 downheap ((WT *)timers, timercnt, w->active - 1); 1919 adjustheap (timers, timercnt, active);
679 } 1920 }
680 1921
681 w->at = w->repeat; 1922 --timercnt;
1923 }
682 1924
1925 ev_at (w) -= mn_now;
1926
683 ev_stop ((W)w); 1927 ev_stop (EV_A_ (W)w);
684} 1928}
685 1929
686void 1930void noinline
687evtimer_again (struct ev_timer *w) 1931ev_timer_again (EV_P_ ev_timer *w)
688{ 1932{
689 if (ev_is_active (w)) 1933 if (ev_is_active (w))
690 { 1934 {
691 if (w->repeat) 1935 if (w->repeat)
692 { 1936 {
693 w->at = now + w->repeat; 1937 ev_at (w) = mn_now + w->repeat;
694 downheap ((WT *)timers, timercnt, w->active - 1); 1938 adjustheap (timers, timercnt, ev_active (w));
695 } 1939 }
696 else 1940 else
697 evtimer_stop (w); 1941 ev_timer_stop (EV_A_ w);
698 } 1942 }
699 else if (w->repeat) 1943 else if (w->repeat)
1944 {
1945 ev_at (w) = w->repeat;
700 evtimer_start (w); 1946 ev_timer_start (EV_A_ w);
1947 }
701} 1948}
702 1949
703void 1950#if EV_PERIODIC_ENABLE
1951void noinline
704evperiodic_start (struct ev_periodic *w) 1952ev_periodic_start (EV_P_ ev_periodic *w)
705{ 1953{
706 if (ev_is_active (w)) 1954 if (expect_false (ev_is_active (w)))
707 return; 1955 return;
708 1956
709 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1957 if (w->reschedule_cb)
710 1958 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1959 else if (w->interval)
1960 {
1961 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
711 /* this formula differs from the one in periodic_reify because we do not always round up */ 1962 /* this formula differs from the one in periodic_reify because we do not always round up */
712 if (w->interval)
713 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1963 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1964 }
1965 else
1966 ev_at (w) = w->offset;
714 1967
715 ev_start ((W)w, ++periodiccnt); 1968 ev_start (EV_A_ (W)w, ++periodiccnt);
716 array_needsize (periodics, periodicmax, periodiccnt, ); 1969 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
717 periodics [periodiccnt - 1] = w; 1970 periodics [periodiccnt] = (WT)w;
718 upheap ((WT *)periodics, periodiccnt - 1); 1971 upheap (periodics, periodiccnt);
719}
720 1972
721void 1973 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1974}
1975
1976void noinline
722evperiodic_stop (struct ev_periodic *w) 1977ev_periodic_stop (EV_P_ ev_periodic *w)
723{ 1978{
1979 clear_pending (EV_A_ (W)w);
724 if (!ev_is_active (w)) 1980 if (expect_false (!ev_is_active (w)))
725 return; 1981 return;
726 1982
727 if (w->active < periodiccnt--) 1983 {
1984 int active = ev_active (w);
1985
1986 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1987
1988 if (expect_true (active < periodiccnt))
728 { 1989 {
729 periodics [w->active - 1] = periodics [periodiccnt]; 1990 periodics [active] = periodics [periodiccnt];
730 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1991 adjustheap (periodics, periodiccnt, active);
731 } 1992 }
732 1993
1994 --periodiccnt;
1995 }
1996
733 ev_stop ((W)w); 1997 ev_stop (EV_A_ (W)w);
734} 1998}
735 1999
736void 2000void noinline
2001ev_periodic_again (EV_P_ ev_periodic *w)
2002{
2003 /* TODO: use adjustheap and recalculation */
2004 ev_periodic_stop (EV_A_ w);
2005 ev_periodic_start (EV_A_ w);
2006}
2007#endif
2008
2009#ifndef SA_RESTART
2010# define SA_RESTART 0
2011#endif
2012
2013void noinline
737evsignal_start (struct ev_signal *w) 2014ev_signal_start (EV_P_ ev_signal *w)
738{ 2015{
2016#if EV_MULTIPLICITY
2017 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2018#endif
739 if (ev_is_active (w)) 2019 if (expect_false (ev_is_active (w)))
740 return; 2020 return;
741 2021
742 ev_start ((W)w, 1); 2022 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2023
2024 evpipe_init (EV_A);
2025
2026 {
2027#ifndef _WIN32
2028 sigset_t full, prev;
2029 sigfillset (&full);
2030 sigprocmask (SIG_SETMASK, &full, &prev);
2031#endif
2032
743 array_needsize (signals, signalmax, w->signum, signals_init); 2033 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2034
2035#ifndef _WIN32
2036 sigprocmask (SIG_SETMASK, &prev, 0);
2037#endif
2038 }
2039
2040 ev_start (EV_A_ (W)w, 1);
744 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2041 wlist_add (&signals [w->signum - 1].head, (WL)w);
745 2042
746 if (!w->next) 2043 if (!((WL)w)->next)
747 { 2044 {
2045#if _WIN32
2046 signal (w->signum, ev_sighandler);
2047#else
748 struct sigaction sa; 2048 struct sigaction sa;
749 sa.sa_handler = sighandler; 2049 sa.sa_handler = ev_sighandler;
750 sigfillset (&sa.sa_mask); 2050 sigfillset (&sa.sa_mask);
751 sa.sa_flags = 0; 2051 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
752 sigaction (w->signum, &sa, 0); 2052 sigaction (w->signum, &sa, 0);
2053#endif
753 } 2054 }
754} 2055}
755 2056
756void 2057void noinline
757evsignal_stop (struct ev_signal *w) 2058ev_signal_stop (EV_P_ ev_signal *w)
758{ 2059{
2060 clear_pending (EV_A_ (W)w);
759 if (!ev_is_active (w)) 2061 if (expect_false (!ev_is_active (w)))
760 return; 2062 return;
761 2063
762 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2064 wlist_del (&signals [w->signum - 1].head, (WL)w);
763 ev_stop ((W)w); 2065 ev_stop (EV_A_ (W)w);
764 2066
765 if (!signals [w->signum - 1].head) 2067 if (!signals [w->signum - 1].head)
766 signal (w->signum, SIG_DFL); 2068 signal (w->signum, SIG_DFL);
767} 2069}
768 2070
769void evidle_start (struct ev_idle *w) 2071void
2072ev_child_start (EV_P_ ev_child *w)
770{ 2073{
2074#if EV_MULTIPLICITY
2075 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2076#endif
771 if (ev_is_active (w)) 2077 if (expect_false (ev_is_active (w)))
772 return; 2078 return;
773 2079
774 ev_start ((W)w, ++idlecnt); 2080 ev_start (EV_A_ (W)w, 1);
775 array_needsize (idles, idlemax, idlecnt, ); 2081 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
776 idles [idlecnt - 1] = w;
777} 2082}
778 2083
779void evidle_stop (struct ev_idle *w) 2084void
2085ev_child_stop (EV_P_ ev_child *w)
780{ 2086{
781 idles [w->active - 1] = idles [--idlecnt]; 2087 clear_pending (EV_A_ (W)w);
2088 if (expect_false (!ev_is_active (w)))
2089 return;
2090
2091 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
782 ev_stop ((W)w); 2092 ev_stop (EV_A_ (W)w);
783} 2093}
784 2094
2095#if EV_STAT_ENABLE
2096
2097# ifdef _WIN32
2098# undef lstat
2099# define lstat(a,b) _stati64 (a,b)
2100# endif
2101
2102#define DEF_STAT_INTERVAL 5.0074891
2103#define MIN_STAT_INTERVAL 0.1074891
2104
2105static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2106
2107#if EV_USE_INOTIFY
2108# define EV_INOTIFY_BUFSIZE 8192
2109
2110static void noinline
2111infy_add (EV_P_ ev_stat *w)
2112{
2113 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);
2114
2115 if (w->wd < 0)
2116 {
2117 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2118
2119 /* monitor some parent directory for speedup hints */
2120 /* note that exceeding the hardcoded limit is not a correctness issue, */
2121 /* but an efficiency issue only */
2122 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2123 {
2124 char path [4096];
2125 strcpy (path, w->path);
2126
2127 do
2128 {
2129 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2130 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2131
2132 char *pend = strrchr (path, '/');
2133
2134 if (!pend)
2135 break; /* whoops, no '/', complain to your admin */
2136
2137 *pend = 0;
2138 w->wd = inotify_add_watch (fs_fd, path, mask);
2139 }
2140 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2141 }
2142 }
2143 else
2144 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2145
2146 if (w->wd >= 0)
2147 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2148}
2149
2150static void noinline
2151infy_del (EV_P_ ev_stat *w)
2152{
2153 int slot;
2154 int wd = w->wd;
2155
2156 if (wd < 0)
2157 return;
2158
2159 w->wd = -2;
2160 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2161 wlist_del (&fs_hash [slot].head, (WL)w);
2162
2163 /* remove this watcher, if others are watching it, they will rearm */
2164 inotify_rm_watch (fs_fd, wd);
2165}
2166
2167static void noinline
2168infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2169{
2170 if (slot < 0)
2171 /* overflow, need to check for all hahs slots */
2172 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2173 infy_wd (EV_A_ slot, wd, ev);
2174 else
2175 {
2176 WL w_;
2177
2178 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2179 {
2180 ev_stat *w = (ev_stat *)w_;
2181 w_ = w_->next; /* lets us remove this watcher and all before it */
2182
2183 if (w->wd == wd || wd == -1)
2184 {
2185 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2186 {
2187 w->wd = -1;
2188 infy_add (EV_A_ w); /* re-add, no matter what */
2189 }
2190
2191 stat_timer_cb (EV_A_ &w->timer, 0);
2192 }
2193 }
2194 }
2195}
2196
2197static void
2198infy_cb (EV_P_ ev_io *w, int revents)
2199{
2200 char buf [EV_INOTIFY_BUFSIZE];
2201 struct inotify_event *ev = (struct inotify_event *)buf;
2202 int ofs;
2203 int len = read (fs_fd, buf, sizeof (buf));
2204
2205 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2206 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2207}
2208
2209void inline_size
2210infy_init (EV_P)
2211{
2212 if (fs_fd != -2)
2213 return;
2214
2215 fs_fd = inotify_init ();
2216
2217 if (fs_fd >= 0)
2218 {
2219 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2220 ev_set_priority (&fs_w, EV_MAXPRI);
2221 ev_io_start (EV_A_ &fs_w);
2222 }
2223}
2224
2225void inline_size
2226infy_fork (EV_P)
2227{
2228 int slot;
2229
2230 if (fs_fd < 0)
2231 return;
2232
2233 close (fs_fd);
2234 fs_fd = inotify_init ();
2235
2236 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2237 {
2238 WL w_ = fs_hash [slot].head;
2239 fs_hash [slot].head = 0;
2240
2241 while (w_)
2242 {
2243 ev_stat *w = (ev_stat *)w_;
2244 w_ = w_->next; /* lets us add this watcher */
2245
2246 w->wd = -1;
2247
2248 if (fs_fd >= 0)
2249 infy_add (EV_A_ w); /* re-add, no matter what */
2250 else
2251 ev_timer_start (EV_A_ &w->timer);
2252 }
2253
2254 }
2255}
2256
2257#endif
2258
2259void
2260ev_stat_stat (EV_P_ ev_stat *w)
2261{
2262 if (lstat (w->path, &w->attr) < 0)
2263 w->attr.st_nlink = 0;
2264 else if (!w->attr.st_nlink)
2265 w->attr.st_nlink = 1;
2266}
2267
2268static void noinline
2269stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2270{
2271 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2272
2273 /* we copy this here each the time so that */
2274 /* prev has the old value when the callback gets invoked */
2275 w->prev = w->attr;
2276 ev_stat_stat (EV_A_ w);
2277
2278 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2279 if (
2280 w->prev.st_dev != w->attr.st_dev
2281 || w->prev.st_ino != w->attr.st_ino
2282 || w->prev.st_mode != w->attr.st_mode
2283 || w->prev.st_nlink != w->attr.st_nlink
2284 || w->prev.st_uid != w->attr.st_uid
2285 || w->prev.st_gid != w->attr.st_gid
2286 || w->prev.st_rdev != w->attr.st_rdev
2287 || w->prev.st_size != w->attr.st_size
2288 || w->prev.st_atime != w->attr.st_atime
2289 || w->prev.st_mtime != w->attr.st_mtime
2290 || w->prev.st_ctime != w->attr.st_ctime
2291 ) {
2292 #if EV_USE_INOTIFY
2293 infy_del (EV_A_ w);
2294 infy_add (EV_A_ w);
2295 ev_stat_stat (EV_A_ w); /* avoid race... */
2296 #endif
2297
2298 ev_feed_event (EV_A_ w, EV_STAT);
2299 }
2300}
2301
2302void
2303ev_stat_start (EV_P_ ev_stat *w)
2304{
2305 if (expect_false (ev_is_active (w)))
2306 return;
2307
2308 /* since we use memcmp, we need to clear any padding data etc. */
2309 memset (&w->prev, 0, sizeof (ev_statdata));
2310 memset (&w->attr, 0, sizeof (ev_statdata));
2311
2312 ev_stat_stat (EV_A_ w);
2313
2314 if (w->interval < MIN_STAT_INTERVAL)
2315 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2316
2317 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2318 ev_set_priority (&w->timer, ev_priority (w));
2319
2320#if EV_USE_INOTIFY
2321 infy_init (EV_A);
2322
2323 if (fs_fd >= 0)
2324 infy_add (EV_A_ w);
2325 else
2326#endif
2327 ev_timer_start (EV_A_ &w->timer);
2328
2329 ev_start (EV_A_ (W)w, 1);
2330}
2331
2332void
2333ev_stat_stop (EV_P_ ev_stat *w)
2334{
2335 clear_pending (EV_A_ (W)w);
2336 if (expect_false (!ev_is_active (w)))
2337 return;
2338
2339#if EV_USE_INOTIFY
2340 infy_del (EV_A_ w);
2341#endif
2342 ev_timer_stop (EV_A_ &w->timer);
2343
2344 ev_stop (EV_A_ (W)w);
2345}
2346#endif
2347
2348#if EV_IDLE_ENABLE
2349void
2350ev_idle_start (EV_P_ ev_idle *w)
2351{
2352 if (expect_false (ev_is_active (w)))
2353 return;
2354
2355 pri_adjust (EV_A_ (W)w);
2356
2357 {
2358 int active = ++idlecnt [ABSPRI (w)];
2359
2360 ++idleall;
2361 ev_start (EV_A_ (W)w, active);
2362
2363 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2364 idles [ABSPRI (w)][active - 1] = w;
2365 }
2366}
2367
2368void
2369ev_idle_stop (EV_P_ ev_idle *w)
2370{
2371 clear_pending (EV_A_ (W)w);
2372 if (expect_false (!ev_is_active (w)))
2373 return;
2374
2375 {
2376 int active = ev_active (w);
2377
2378 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2379 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2380
2381 ev_stop (EV_A_ (W)w);
2382 --idleall;
2383 }
2384}
2385#endif
2386
2387void
2388ev_prepare_start (EV_P_ ev_prepare *w)
2389{
2390 if (expect_false (ev_is_active (w)))
2391 return;
2392
2393 ev_start (EV_A_ (W)w, ++preparecnt);
2394 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2395 prepares [preparecnt - 1] = w;
2396}
2397
2398void
2399ev_prepare_stop (EV_P_ ev_prepare *w)
2400{
2401 clear_pending (EV_A_ (W)w);
2402 if (expect_false (!ev_is_active (w)))
2403 return;
2404
2405 {
2406 int active = ev_active (w);
2407
2408 prepares [active - 1] = prepares [--preparecnt];
2409 ev_active (prepares [active - 1]) = active;
2410 }
2411
2412 ev_stop (EV_A_ (W)w);
2413}
2414
2415void
785void evcheck_start (struct ev_check *w) 2416ev_check_start (EV_P_ ev_check *w)
786{ 2417{
787 if (ev_is_active (w)) 2418 if (expect_false (ev_is_active (w)))
788 return; 2419 return;
789 2420
790 ev_start ((W)w, ++checkcnt); 2421 ev_start (EV_A_ (W)w, ++checkcnt);
791 array_needsize (checks, checkmax, checkcnt, ); 2422 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
792 checks [checkcnt - 1] = w; 2423 checks [checkcnt - 1] = w;
793} 2424}
794 2425
2426void
795void evcheck_stop (struct ev_check *w) 2427ev_check_stop (EV_P_ ev_check *w)
796{ 2428{
2429 clear_pending (EV_A_ (W)w);
2430 if (expect_false (!ev_is_active (w)))
2431 return;
2432
2433 {
2434 int active = ev_active (w);
2435
797 checks [w->active - 1] = checks [--checkcnt]; 2436 checks [active - 1] = checks [--checkcnt];
2437 ev_active (checks [active - 1]) = active;
2438 }
2439
798 ev_stop ((W)w); 2440 ev_stop (EV_A_ (W)w);
799} 2441}
2442
2443#if EV_EMBED_ENABLE
2444void noinline
2445ev_embed_sweep (EV_P_ ev_embed *w)
2446{
2447 ev_loop (w->other, EVLOOP_NONBLOCK);
2448}
2449
2450static void
2451embed_io_cb (EV_P_ ev_io *io, int revents)
2452{
2453 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2454
2455 if (ev_cb (w))
2456 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2457 else
2458 ev_loop (w->other, EVLOOP_NONBLOCK);
2459}
2460
2461static void
2462embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2463{
2464 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2465
2466 {
2467 struct ev_loop *loop = w->other;
2468
2469 while (fdchangecnt)
2470 {
2471 fd_reify (EV_A);
2472 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2473 }
2474 }
2475}
2476
2477#if 0
2478static void
2479embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2480{
2481 ev_idle_stop (EV_A_ idle);
2482}
2483#endif
2484
2485void
2486ev_embed_start (EV_P_ ev_embed *w)
2487{
2488 if (expect_false (ev_is_active (w)))
2489 return;
2490
2491 {
2492 struct ev_loop *loop = w->other;
2493 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2494 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2495 }
2496
2497 ev_set_priority (&w->io, ev_priority (w));
2498 ev_io_start (EV_A_ &w->io);
2499
2500 ev_prepare_init (&w->prepare, embed_prepare_cb);
2501 ev_set_priority (&w->prepare, EV_MINPRI);
2502 ev_prepare_start (EV_A_ &w->prepare);
2503
2504 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2505
2506 ev_start (EV_A_ (W)w, 1);
2507}
2508
2509void
2510ev_embed_stop (EV_P_ ev_embed *w)
2511{
2512 clear_pending (EV_A_ (W)w);
2513 if (expect_false (!ev_is_active (w)))
2514 return;
2515
2516 ev_io_stop (EV_A_ &w->io);
2517 ev_prepare_stop (EV_A_ &w->prepare);
2518
2519 ev_stop (EV_A_ (W)w);
2520}
2521#endif
2522
2523#if EV_FORK_ENABLE
2524void
2525ev_fork_start (EV_P_ ev_fork *w)
2526{
2527 if (expect_false (ev_is_active (w)))
2528 return;
2529
2530 ev_start (EV_A_ (W)w, ++forkcnt);
2531 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2532 forks [forkcnt - 1] = w;
2533}
2534
2535void
2536ev_fork_stop (EV_P_ ev_fork *w)
2537{
2538 clear_pending (EV_A_ (W)w);
2539 if (expect_false (!ev_is_active (w)))
2540 return;
2541
2542 {
2543 int active = ev_active (w);
2544
2545 forks [active - 1] = forks [--forkcnt];
2546 ev_active (forks [active - 1]) = active;
2547 }
2548
2549 ev_stop (EV_A_ (W)w);
2550}
2551#endif
2552
2553#if EV_ASYNC_ENABLE
2554void
2555ev_async_start (EV_P_ ev_async *w)
2556{
2557 if (expect_false (ev_is_active (w)))
2558 return;
2559
2560 evpipe_init (EV_A);
2561
2562 ev_start (EV_A_ (W)w, ++asynccnt);
2563 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2564 asyncs [asynccnt - 1] = w;
2565}
2566
2567void
2568ev_async_stop (EV_P_ ev_async *w)
2569{
2570 clear_pending (EV_A_ (W)w);
2571 if (expect_false (!ev_is_active (w)))
2572 return;
2573
2574 {
2575 int active = ev_active (w);
2576
2577 asyncs [active - 1] = asyncs [--asynccnt];
2578 ev_active (asyncs [active - 1]) = active;
2579 }
2580
2581 ev_stop (EV_A_ (W)w);
2582}
2583
2584void
2585ev_async_send (EV_P_ ev_async *w)
2586{
2587 w->sent = 1;
2588 evpipe_write (EV_A_ &gotasync);
2589}
2590#endif
800 2591
801/*****************************************************************************/ 2592/*****************************************************************************/
802 2593
803#if 0 2594struct ev_once
804 2595{
805struct ev_io wio; 2596 ev_io io;
2597 ev_timer to;
2598 void (*cb)(int revents, void *arg);
2599 void *arg;
2600};
806 2601
807static void 2602static void
808sin_cb (struct ev_io *w, int revents) 2603once_cb (EV_P_ struct ev_once *once, int revents)
809{ 2604{
810 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 2605 void (*cb)(int revents, void *arg) = once->cb;
2606 void *arg = once->arg;
2607
2608 ev_io_stop (EV_A_ &once->io);
2609 ev_timer_stop (EV_A_ &once->to);
2610 ev_free (once);
2611
2612 cb (revents, arg);
811} 2613}
812 2614
813static void 2615static void
814ocb (struct ev_timer *w, int revents) 2616once_cb_io (EV_P_ ev_io *w, int revents)
815{ 2617{
816 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 2618 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
817 evtimer_stop (w);
818 evtimer_start (w);
819} 2619}
820 2620
821static void 2621static void
822scb (struct ev_signal *w, int revents) 2622once_cb_to (EV_P_ ev_timer *w, int revents)
823{ 2623{
824 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 2624 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
825 evio_stop (&wio);
826 evio_start (&wio);
827} 2625}
828 2626
829static void 2627void
830gcb (struct ev_signal *w, int revents) 2628ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
831{ 2629{
832 fprintf (stderr, "generic %x\n", revents); 2630 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
833 2631
834} 2632 if (expect_false (!once))
835
836int main (void)
837{
838 ev_init (0);
839
840 evio_init (&wio, sin_cb, 0, EV_READ);
841 evio_start (&wio);
842
843 struct ev_timer t[10000];
844
845#if 0
846 int i;
847 for (i = 0; i < 10000; ++i)
848 {
849 struct ev_timer *w = t + i;
850 evw_init (w, ocb, i);
851 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
852 evtimer_start (w);
853 if (drand48 () < 0.5)
854 evtimer_stop (w);
855 } 2633 {
856#endif 2634 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
857
858 struct ev_timer t1;
859 evtimer_init (&t1, ocb, 5, 10);
860 evtimer_start (&t1);
861
862 struct ev_signal sig;
863 evsignal_init (&sig, scb, SIGQUIT);
864 evsignal_start (&sig);
865
866 struct ev_check cw;
867 evcheck_init (&cw, gcb);
868 evcheck_start (&cw);
869
870 struct ev_idle iw;
871 evidle_init (&iw, gcb);
872 evidle_start (&iw);
873
874 ev_loop (0);
875
876 return 0; 2635 return;
877} 2636 }
878 2637
879#endif 2638 once->cb = cb;
2639 once->arg = arg;
880 2640
2641 ev_init (&once->io, once_cb_io);
2642 if (fd >= 0)
2643 {
2644 ev_io_set (&once->io, fd, events);
2645 ev_io_start (EV_A_ &once->io);
2646 }
881 2647
2648 ev_init (&once->to, once_cb_to);
2649 if (timeout >= 0.)
2650 {
2651 ev_timer_set (&once->to, timeout, 0.);
2652 ev_timer_start (EV_A_ &once->to);
2653 }
2654}
882 2655
2656#if EV_MULTIPLICITY
2657 #include "ev_wrap.h"
2658#endif
883 2659
2660#ifdef __cplusplus
2661}
2662#endif
2663

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