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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 1.237 by root, Wed May 7 15:16:56 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/*
765 * at the moment we allow libev the luxury of two heaps,
766 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
767 * which is more cache-efficient.
768 * the difference is about 5% with 50000+ watchers.
769 */
770#define USE_4HEAP !EV_MINIMAL
771#if USE_4HEAP
772
773#define DHEAP 4
774#define HEAP0 (DHEAP - 1) /* index of first element in heap */
775
776/* towards the root */
777void inline_speed
778upheap (WT *heap, int k)
779{
780 WT w = heap [k];
781
782 for (;;)
783 {
784 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
785
786 if (p >= HEAP0 || heap [p]->at <= w->at)
787 break;
788
789 heap [k] = heap [p];
790 ev_active (heap [k]) = k;
791 k = p;
792 }
793
794 heap [k] = w;
795 ev_active (heap [k]) = k;
796}
797
798/* away from the root */
799void inline_speed
800downheap (WT *heap, int N, int k)
801{
802 WT w = heap [k];
803 WT *E = heap + N + HEAP0;
804
805 for (;;)
806 {
807 ev_tstamp minat;
808 WT *minpos;
809 WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
810
811 // find minimum child
812 if (expect_true (pos + DHEAP - 1 < E))
813 {
814 /* fast path */
815 (minpos = pos + 0), (minat = (*minpos)->at);
816 if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
817 if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
818 if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
819 }
820 else
821 {
822 /* slow path */
823 if (pos >= E)
824 break;
825 (minpos = pos + 0), (minat = (*minpos)->at);
826 if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
827 if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
828 if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
829 }
830
831 if (w->at <= minat)
832 break;
833
834 ev_active (*minpos) = k;
835 heap [k] = *minpos;
836
837 k = minpos - heap;
838 }
839
840 heap [k] = w;
841 ev_active (heap [k]) = k;
842}
843
844#else // 4HEAP
845
846#define HEAP0 1
847
848/* towards the root */
849void inline_speed
850upheap (WT *heap, int k)
851{
852 WT w = heap [k];
853
854 for (;;)
855 {
856 int p = k >> 1;
857
858 /* maybe we could use a dummy element at heap [0]? */
859 if (!p || heap [p]->at <= w->at)
860 break;
861
862 heap [k] = heap [p];
863 ev_active (heap [k]) = k;
864 k = p;
865 }
866
867 heap [k] = w;
868 ev_active (heap [k]) = k;
869}
870
871/* away from the root */
872void inline_speed
873downheap (WT *heap, int N, int k)
874{
875 WT w = heap [k];
876
877 for (;;)
878 {
879 int c = k << 1;
880
881 if (c > N)
882 break;
883
884 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
885 ? 1 : 0;
886
887 if (w->at <= heap [c]->at)
888 break;
889
890 heap [k] = heap [c];
891 ((W)heap [k])->active = k;
892
893 k = c;
894 }
895
896 heap [k] = w;
897 ev_active (heap [k]) = k;
898}
899#endif
900
901void inline_size
902adjustheap (WT *heap, int N, int k)
903{
904 upheap (heap, k);
905 downheap (heap, N, k);
906}
907
908/*****************************************************************************/
909
95typedef struct 910typedef struct
96{ 911{
97 struct ev_io *head; 912 WL head;
98 unsigned char wev, rev; /* want, received event set */ 913 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; 914} ANSIG;
216 915
217static ANSIG *signals; 916static ANSIG *signals;
218static int signalmax; 917static int signalmax;
219 918
220static int sigpipe [2]; 919static EV_ATOMIC_T gotsig;
221static sig_atomic_t gotsig;
222static struct ev_io sigev;
223 920
224static void 921void inline_size
225signals_init (ANSIG *base, int count) 922signals_init (ANSIG *base, int count)
226{ 923{
227 while (count--) 924 while (count--)
228 { 925 {
229 base->head = 0; 926 base->head = 0;
230 base->gotsig = 0; 927 base->gotsig = 0;
928
231 ++base; 929 ++base;
232 } 930 }
233} 931}
234 932
933/*****************************************************************************/
934
935void inline_speed
936fd_intern (int fd)
937{
938#ifdef _WIN32
939 int arg = 1;
940 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
941#else
942 fcntl (fd, F_SETFD, FD_CLOEXEC);
943 fcntl (fd, F_SETFL, O_NONBLOCK);
944#endif
945}
946
947static void noinline
948evpipe_init (EV_P)
949{
950 if (!ev_is_active (&pipeev))
951 {
952#if EV_USE_EVENTFD
953 if ((evfd = eventfd (0, 0)) >= 0)
954 {
955 evpipe [0] = -1;
956 fd_intern (evfd);
957 ev_io_set (&pipeev, evfd, EV_READ);
958 }
959 else
960#endif
961 {
962 while (pipe (evpipe))
963 syserr ("(libev) error creating signal/async pipe");
964
965 fd_intern (evpipe [0]);
966 fd_intern (evpipe [1]);
967 ev_io_set (&pipeev, evpipe [0], EV_READ);
968 }
969
970 ev_io_start (EV_A_ &pipeev);
971 ev_unref (EV_A); /* watcher should not keep loop alive */
972 }
973}
974
975void inline_size
976evpipe_write (EV_P_ EV_ATOMIC_T *flag)
977{
978 if (!*flag)
979 {
980 int old_errno = errno; /* save errno because write might clobber it */
981
982 *flag = 1;
983
984#if EV_USE_EVENTFD
985 if (evfd >= 0)
986 {
987 uint64_t counter = 1;
988 write (evfd, &counter, sizeof (uint64_t));
989 }
990 else
991#endif
992 write (evpipe [1], &old_errno, 1);
993
994 errno = old_errno;
995 }
996}
997
235static void 998static void
999pipecb (EV_P_ ev_io *iow, int revents)
1000{
1001#if EV_USE_EVENTFD
1002 if (evfd >= 0)
1003 {
1004 uint64_t counter;
1005 read (evfd, &counter, sizeof (uint64_t));
1006 }
1007 else
1008#endif
1009 {
1010 char dummy;
1011 read (evpipe [0], &dummy, 1);
1012 }
1013
1014 if (gotsig && ev_is_default_loop (EV_A))
1015 {
1016 int signum;
1017 gotsig = 0;
1018
1019 for (signum = signalmax; signum--; )
1020 if (signals [signum].gotsig)
1021 ev_feed_signal_event (EV_A_ signum + 1);
1022 }
1023
1024#if EV_ASYNC_ENABLE
1025 if (gotasync)
1026 {
1027 int i;
1028 gotasync = 0;
1029
1030 for (i = asynccnt; i--; )
1031 if (asyncs [i]->sent)
1032 {
1033 asyncs [i]->sent = 0;
1034 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1035 }
1036 }
1037#endif
1038}
1039
1040/*****************************************************************************/
1041
1042static void
236sighandler (int signum) 1043ev_sighandler (int signum)
237{ 1044{
1045#if EV_MULTIPLICITY
1046 struct ev_loop *loop = &default_loop_struct;
1047#endif
1048
1049#if _WIN32
1050 signal (signum, ev_sighandler);
1051#endif
1052
238 signals [signum - 1].gotsig = 1; 1053 signals [signum - 1].gotsig = 1;
1054 evpipe_write (EV_A_ &gotsig);
1055}
239 1056
240 if (!gotsig) 1057void noinline
1058ev_feed_signal_event (EV_P_ int signum)
1059{
1060 WL w;
1061
1062#if EV_MULTIPLICITY
1063 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1064#endif
1065
1066 --signum;
1067
1068 if (signum < 0 || signum >= signalmax)
1069 return;
1070
1071 signals [signum].gotsig = 0;
1072
1073 for (w = signals [signum].head; w; w = w->next)
1074 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1075}
1076
1077/*****************************************************************************/
1078
1079static WL childs [EV_PID_HASHSIZE];
1080
1081#ifndef _WIN32
1082
1083static ev_signal childev;
1084
1085#ifndef WIFCONTINUED
1086# define WIFCONTINUED(status) 0
1087#endif
1088
1089void inline_speed
1090child_reap (EV_P_ int chain, int pid, int status)
1091{
1092 ev_child *w;
1093 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1094
1095 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1096 {
1097 if ((w->pid == pid || !w->pid)
1098 && (!traced || (w->flags & 1)))
1099 {
1100 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1101 w->rpid = pid;
1102 w->rstatus = status;
1103 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1104 }
1105 }
1106}
1107
1108#ifndef WCONTINUED
1109# define WCONTINUED 0
1110#endif
1111
1112static void
1113childcb (EV_P_ ev_signal *sw, int revents)
1114{
1115 int pid, status;
1116
1117 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1118 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1119 if (!WCONTINUED
1120 || errno != EINVAL
1121 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1122 return;
1123
1124 /* make sure we are called again until all children have been reaped */
1125 /* we need to do it this way so that the callback gets called before we continue */
1126 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1127
1128 child_reap (EV_A_ pid, pid, status);
1129 if (EV_PID_HASHSIZE > 1)
1130 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1131}
1132
1133#endif
1134
1135/*****************************************************************************/
1136
1137#if EV_USE_PORT
1138# include "ev_port.c"
1139#endif
1140#if EV_USE_KQUEUE
1141# include "ev_kqueue.c"
1142#endif
1143#if EV_USE_EPOLL
1144# include "ev_epoll.c"
1145#endif
1146#if EV_USE_POLL
1147# include "ev_poll.c"
1148#endif
1149#if EV_USE_SELECT
1150# include "ev_select.c"
1151#endif
1152
1153int
1154ev_version_major (void)
1155{
1156 return EV_VERSION_MAJOR;
1157}
1158
1159int
1160ev_version_minor (void)
1161{
1162 return EV_VERSION_MINOR;
1163}
1164
1165/* return true if we are running with elevated privileges and should ignore env variables */
1166int inline_size
1167enable_secure (void)
1168{
1169#ifdef _WIN32
1170 return 0;
1171#else
1172 return getuid () != geteuid ()
1173 || getgid () != getegid ();
1174#endif
1175}
1176
1177unsigned int
1178ev_supported_backends (void)
1179{
1180 unsigned int flags = 0;
1181
1182 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1183 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1184 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1185 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1186 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1187
1188 return flags;
1189}
1190
1191unsigned int
1192ev_recommended_backends (void)
1193{
1194 unsigned int flags = ev_supported_backends ();
1195
1196#ifndef __NetBSD__
1197 /* kqueue is borked on everything but netbsd apparently */
1198 /* it usually doesn't work correctly on anything but sockets and pipes */
1199 flags &= ~EVBACKEND_KQUEUE;
1200#endif
1201#ifdef __APPLE__
1202 // flags &= ~EVBACKEND_KQUEUE; for documentation
1203 flags &= ~EVBACKEND_POLL;
1204#endif
1205
1206 return flags;
1207}
1208
1209unsigned int
1210ev_embeddable_backends (void)
1211{
1212 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1213
1214 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1215 /* please fix it and tell me how to detect the fix */
1216 flags &= ~EVBACKEND_EPOLL;
1217
1218 return flags;
1219}
1220
1221unsigned int
1222ev_backend (EV_P)
1223{
1224 return backend;
1225}
1226
1227unsigned int
1228ev_loop_count (EV_P)
1229{
1230 return loop_count;
1231}
1232
1233void
1234ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1235{
1236 io_blocktime = interval;
1237}
1238
1239void
1240ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1241{
1242 timeout_blocktime = interval;
1243}
1244
1245static void noinline
1246loop_init (EV_P_ unsigned int flags)
1247{
1248 if (!backend)
1249 {
1250#if EV_USE_MONOTONIC
241 { 1251 {
1252 struct timespec ts;
1253 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1254 have_monotonic = 1;
1255 }
1256#endif
1257
1258 ev_rt_now = ev_time ();
1259 mn_now = get_clock ();
1260 now_floor = mn_now;
1261 rtmn_diff = ev_rt_now - mn_now;
1262
1263 io_blocktime = 0.;
1264 timeout_blocktime = 0.;
1265 backend = 0;
1266 backend_fd = -1;
1267 gotasync = 0;
1268#if EV_USE_INOTIFY
1269 fs_fd = -2;
1270#endif
1271
1272 /* pid check not overridable via env */
1273#ifndef _WIN32
1274 if (flags & EVFLAG_FORKCHECK)
1275 curpid = getpid ();
1276#endif
1277
1278 if (!(flags & EVFLAG_NOENV)
1279 && !enable_secure ()
1280 && getenv ("LIBEV_FLAGS"))
1281 flags = atoi (getenv ("LIBEV_FLAGS"));
1282
1283 if (!(flags & 0x0000ffffU))
1284 flags |= ev_recommended_backends ();
1285
1286#if EV_USE_PORT
1287 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1288#endif
1289#if EV_USE_KQUEUE
1290 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1291#endif
1292#if EV_USE_EPOLL
1293 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1294#endif
1295#if EV_USE_POLL
1296 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1297#endif
1298#if EV_USE_SELECT
1299 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1300#endif
1301
1302 ev_init (&pipeev, pipecb);
1303 ev_set_priority (&pipeev, EV_MAXPRI);
1304 }
1305}
1306
1307static void noinline
1308loop_destroy (EV_P)
1309{
1310 int i;
1311
1312 if (ev_is_active (&pipeev))
1313 {
1314 ev_ref (EV_A); /* signal watcher */
1315 ev_io_stop (EV_A_ &pipeev);
1316
1317#if EV_USE_EVENTFD
1318 if (evfd >= 0)
1319 close (evfd);
1320#endif
1321
1322 if (evpipe [0] >= 0)
1323 {
1324 close (evpipe [0]);
1325 close (evpipe [1]);
1326 }
1327 }
1328
1329#if EV_USE_INOTIFY
1330 if (fs_fd >= 0)
1331 close (fs_fd);
1332#endif
1333
1334 if (backend_fd >= 0)
1335 close (backend_fd);
1336
1337#if EV_USE_PORT
1338 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1339#endif
1340#if EV_USE_KQUEUE
1341 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1342#endif
1343#if EV_USE_EPOLL
1344 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1345#endif
1346#if EV_USE_POLL
1347 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1348#endif
1349#if EV_USE_SELECT
1350 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1351#endif
1352
1353 for (i = NUMPRI; i--; )
1354 {
1355 array_free (pending, [i]);
1356#if EV_IDLE_ENABLE
1357 array_free (idle, [i]);
1358#endif
1359 }
1360
1361 ev_free (anfds); anfdmax = 0;
1362
1363 /* have to use the microsoft-never-gets-it-right macro */
1364 array_free (fdchange, EMPTY);
1365 array_free (timer, EMPTY);
1366#if EV_PERIODIC_ENABLE
1367 array_free (periodic, EMPTY);
1368#endif
1369#if EV_FORK_ENABLE
1370 array_free (fork, EMPTY);
1371#endif
1372 array_free (prepare, EMPTY);
1373 array_free (check, EMPTY);
1374#if EV_ASYNC_ENABLE
1375 array_free (async, EMPTY);
1376#endif
1377
1378 backend = 0;
1379}
1380
1381#if EV_USE_INOTIFY
1382void inline_size infy_fork (EV_P);
1383#endif
1384
1385void inline_size
1386loop_fork (EV_P)
1387{
1388#if EV_USE_PORT
1389 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1390#endif
1391#if EV_USE_KQUEUE
1392 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1393#endif
1394#if EV_USE_EPOLL
1395 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1396#endif
1397#if EV_USE_INOTIFY
1398 infy_fork (EV_A);
1399#endif
1400
1401 if (ev_is_active (&pipeev))
1402 {
1403 /* this "locks" the handlers against writing to the pipe */
1404 /* while we modify the fd vars */
242 gotsig = 1; 1405 gotsig = 1;
243 write (sigpipe [1], &gotsig, 1); 1406#if EV_ASYNC_ENABLE
1407 gotasync = 1;
1408#endif
1409
1410 ev_ref (EV_A);
1411 ev_io_stop (EV_A_ &pipeev);
1412
1413#if EV_USE_EVENTFD
1414 if (evfd >= 0)
1415 close (evfd);
1416#endif
1417
1418 if (evpipe [0] >= 0)
1419 {
1420 close (evpipe [0]);
1421 close (evpipe [1]);
1422 }
1423
1424 evpipe_init (EV_A);
1425 /* now iterate over everything, in case we missed something */
1426 pipecb (EV_A_ &pipeev, EV_READ);
1427 }
1428
1429 postfork = 0;
1430}
1431
1432#if EV_MULTIPLICITY
1433struct ev_loop *
1434ev_loop_new (unsigned int flags)
1435{
1436 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1437
1438 memset (loop, 0, sizeof (struct ev_loop));
1439
1440 loop_init (EV_A_ flags);
1441
1442 if (ev_backend (EV_A))
1443 return loop;
1444
1445 return 0;
1446}
1447
1448void
1449ev_loop_destroy (EV_P)
1450{
1451 loop_destroy (EV_A);
1452 ev_free (loop);
1453}
1454
1455void
1456ev_loop_fork (EV_P)
1457{
1458 postfork = 1; /* must be in line with ev_default_fork */
1459}
1460#endif
1461
1462#if EV_MULTIPLICITY
1463struct ev_loop *
1464ev_default_loop_init (unsigned int flags)
1465#else
1466int
1467ev_default_loop (unsigned int flags)
1468#endif
1469{
1470 if (!ev_default_loop_ptr)
244 } 1471 {
245} 1472#if EV_MULTIPLICITY
1473 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1474#else
1475 ev_default_loop_ptr = 1;
1476#endif
246 1477
247static void 1478 loop_init (EV_A_ flags);
248sigcb (struct ev_io *iow, int revents) 1479
1480 if (ev_backend (EV_A))
1481 {
1482#ifndef _WIN32
1483 ev_signal_init (&childev, childcb, SIGCHLD);
1484 ev_set_priority (&childev, EV_MAXPRI);
1485 ev_signal_start (EV_A_ &childev);
1486 ev_unref (EV_A); /* child watcher should not keep loop alive */
1487#endif
1488 }
1489 else
1490 ev_default_loop_ptr = 0;
1491 }
1492
1493 return ev_default_loop_ptr;
1494}
1495
1496void
1497ev_default_destroy (void)
249{ 1498{
250 struct ev_signal *w; 1499#if EV_MULTIPLICITY
1500 struct ev_loop *loop = ev_default_loop_ptr;
1501#endif
1502
1503#ifndef _WIN32
1504 ev_ref (EV_A); /* child watcher */
1505 ev_signal_stop (EV_A_ &childev);
1506#endif
1507
1508 loop_destroy (EV_A);
1509}
1510
1511void
1512ev_default_fork (void)
1513{
1514#if EV_MULTIPLICITY
1515 struct ev_loop *loop = ev_default_loop_ptr;
1516#endif
1517
1518 if (backend)
1519 postfork = 1; /* must be in line with ev_loop_fork */
1520}
1521
1522/*****************************************************************************/
1523
1524void
1525ev_invoke (EV_P_ void *w, int revents)
1526{
1527 EV_CB_INVOKE ((W)w, revents);
1528}
1529
1530void inline_speed
1531call_pending (EV_P)
1532{
251 int sig; 1533 int pri;
252 1534
253 gotsig = 0; 1535 for (pri = NUMPRI; pri--; )
254 read (sigpipe [0], &revents, 1); 1536 while (pendingcnt [pri])
255
256 for (sig = signalmax; sig--; )
257 if (signals [sig].gotsig)
258 { 1537 {
259 signals [sig].gotsig = 0; 1538 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
260 1539
261 for (w = signals [sig].head; w; w = w->next) 1540 if (expect_true (p->w))
262 event ((W)w, EV_SIGNAL); 1541 {
1542 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1543
1544 p->w->pending = 0;
1545 EV_CB_INVOKE (p->w, p->events);
1546 }
263 } 1547 }
264} 1548}
265 1549
266static void 1550#if EV_IDLE_ENABLE
267siginit (void) 1551void inline_size
1552idle_reify (EV_P)
268{ 1553{
269 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 1554 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 } 1555 {
1556 int pri;
327 1557
328 return ev_method; 1558 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 { 1559 {
377 method_modify (fd, anfd->wev, wev); 1560 if (pendingcnt [pri])
378 anfd->wev = wev; 1561 break;
1562
1563 if (idlecnt [pri])
1564 {
1565 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1566 break;
1567 }
379 } 1568 }
380 } 1569 }
381
382 fdchangecnt = 0;
383} 1570}
1571#endif
384 1572
385static void 1573void 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 () 1574timers_reify (EV_P)
406{ 1575{
407 while (timercnt && timers [0]->at <= now) 1576 while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
408 { 1577 {
409 struct ev_timer *w = timers [0]; 1578 ev_timer *w = (ev_timer *)timers [HEAP0];
1579
1580 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
410 1581
411 /* first reschedule or stop timer */ 1582 /* first reschedule or stop timer */
412 if (w->repeat) 1583 if (w->repeat)
413 { 1584 {
414 w->at = now + w->repeat; 1585 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)); 1586
1587 ev_at (w) += w->repeat;
1588 if (ev_at (w) < mn_now)
1589 ev_at (w) = mn_now;
1590
416 downheap ((WT *)timers, timercnt, 0); 1591 downheap (timers, timercnt, HEAP0);
417 } 1592 }
418 else 1593 else
419 evtimer_stop (w); /* nonrepeating: stop timer */ 1594 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
420 1595
421 event ((W)w, EV_TIMEOUT); 1596 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
422 } 1597 }
423} 1598}
424 1599
425static void 1600#if EV_PERIODIC_ENABLE
1601void inline_size
426periodics_reify () 1602periodics_reify (EV_P)
427{ 1603{
428 while (periodiccnt && periodics [0]->at <= ev_now) 1604 while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
429 { 1605 {
430 struct ev_periodic *w = periodics [0]; 1606 ev_periodic *w = (ev_periodic *)periodics [HEAP0];
1607
1608 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
431 1609
432 /* first reschedule or stop timer */ 1610 /* first reschedule or stop timer */
433 if (w->interval) 1611 if (w->reschedule_cb)
434 { 1612 {
435 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1613 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)); 1614 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
437 downheap ((WT *)periodics, periodiccnt, 0); 1615 downheap (periodics, periodiccnt, 1);
1616 }
1617 else if (w->interval)
1618 {
1619 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1620 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1621 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1622 downheap (periodics, periodiccnt, HEAP0);
438 } 1623 }
439 else 1624 else
440 evperiodic_stop (w); /* nonrepeating: stop timer */ 1625 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
441 1626
442 event ((W)w, EV_TIMEOUT); 1627 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
443 } 1628 }
444} 1629}
445 1630
446static void 1631static void noinline
447periodics_reschedule (ev_tstamp diff) 1632periodics_reschedule (EV_P)
448{ 1633{
449 int i; 1634 int i;
450 1635
451 /* adjust periodics after time jump */ 1636 /* adjust periodics after time jump */
452 for (i = 0; i < periodiccnt; ++i) 1637 for (i = 1; i <= periodiccnt; ++i)
453 { 1638 {
454 struct ev_periodic *w = periodics [i]; 1639 ev_periodic *w = (ev_periodic *)periodics [i];
455 1640
1641 if (w->reschedule_cb)
1642 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
456 if (w->interval) 1643 else if (w->interval)
1644 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1645 }
1646
1647 /* now rebuild the heap */
1648 for (i = periodiccnt >> 1; --i; )
1649 downheap (periodics, periodiccnt, i + HEAP0);
1650}
1651#endif
1652
1653void inline_speed
1654time_update (EV_P_ ev_tstamp max_block)
1655{
1656 int i;
1657
1658#if EV_USE_MONOTONIC
1659 if (expect_true (have_monotonic))
1660 {
1661 ev_tstamp odiff = rtmn_diff;
1662
1663 mn_now = get_clock ();
1664
1665 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1666 /* interpolate in the meantime */
1667 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
457 { 1668 {
458 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1669 ev_rt_now = rtmn_diff + mn_now;
459 1670 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 } 1671 }
468 }
469}
470 1672
471static void 1673 now_floor = mn_now;
472time_update ()
473{
474 int i;
475
476 ev_now = ev_time (); 1674 ev_rt_now = ev_time ();
477 1675
478 if (have_monotonic)
479 {
480 ev_tstamp odiff = diff;
481
482 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1676 /* loop a few times, before making important decisions.
1677 * on the choice of "4": one iteration isn't enough,
1678 * in case we get preempted during the calls to
1679 * ev_time and get_clock. a second call is almost guaranteed
1680 * to succeed in that case, though. and looping a few more times
1681 * doesn't hurt either as we only do this on time-jumps or
1682 * in the unlikely event of having been preempted here.
1683 */
1684 for (i = 4; --i; )
483 { 1685 {
484 now = get_clock ();
485 diff = ev_now - now; 1686 rtmn_diff = ev_rt_now - mn_now;
486 1687
487 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1688 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
488 return; /* all is well */ 1689 return; /* all is well */
489 1690
490 ev_now = ev_time (); 1691 ev_rt_now = ev_time ();
1692 mn_now = get_clock ();
1693 now_floor = mn_now;
491 } 1694 }
492 1695
1696# if EV_PERIODIC_ENABLE
493 periodics_reschedule (diff - odiff); 1697 periodics_reschedule (EV_A);
1698# endif
494 /* no timer adjustment, as the monotonic clock doesn't jump */ 1699 /* no timer adjustment, as the monotonic clock doesn't jump */
1700 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
495 } 1701 }
496 else 1702 else
1703#endif
497 { 1704 {
498 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1705 ev_rt_now = ev_time ();
1706
1707 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
499 { 1708 {
1709#if EV_PERIODIC_ENABLE
500 periodics_reschedule (ev_now - now); 1710 periodics_reschedule (EV_A);
501 1711#endif
502 /* adjust timers. this is easy, as the offset is the same for all */ 1712 /* adjust timers. this is easy, as the offset is the same for all of them */
503 for (i = 0; i < timercnt; ++i) 1713 for (i = 1; i <= timercnt; ++i)
504 timers [i]->at += diff; 1714 ev_at (timers [i]) += ev_rt_now - mn_now;
505 } 1715 }
506 1716
507 now = ev_now; 1717 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 { 1718 }
520 queue_events ((W *)checks, checkcnt, EV_CHECK); 1719}
521 call_pending (); 1720
522 } 1721void
1722ev_ref (EV_P)
1723{
1724 ++activecnt;
1725}
1726
1727void
1728ev_unref (EV_P)
1729{
1730 --activecnt;
1731}
1732
1733static int loop_done;
1734
1735void
1736ev_loop (EV_P_ int flags)
1737{
1738 loop_done = EVUNLOOP_CANCEL;
1739
1740 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
523 1741
524 do 1742 do
525 { 1743 {
1744#ifndef _WIN32
1745 if (expect_false (curpid)) /* penalise the forking check even more */
1746 if (expect_false (getpid () != curpid))
1747 {
1748 curpid = getpid ();
1749 postfork = 1;
1750 }
1751#endif
1752
1753#if EV_FORK_ENABLE
1754 /* we might have forked, so queue fork handlers */
1755 if (expect_false (postfork))
1756 if (forkcnt)
1757 {
1758 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1759 call_pending (EV_A);
1760 }
1761#endif
1762
1763 /* queue prepare watchers (and execute them) */
1764 if (expect_false (preparecnt))
1765 {
1766 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1767 call_pending (EV_A);
1768 }
1769
1770 if (expect_false (!activecnt))
1771 break;
1772
1773 /* we might have forked, so reify kernel state if necessary */
1774 if (expect_false (postfork))
1775 loop_fork (EV_A);
1776
526 /* update fd-related kernel structures */ 1777 /* update fd-related kernel structures */
527 fd_reify (); 1778 fd_reify (EV_A);
528 1779
529 /* calculate blocking time */ 1780 /* calculate blocking time */
1781 {
1782 ev_tstamp waittime = 0.;
1783 ev_tstamp sleeptime = 0.;
530 1784
531 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1785 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 { 1786 {
1787 /* update time to cancel out callback processing overhead */
1788 time_update (EV_A_ 1e100);
1789
538 block = MAX_BLOCKTIME; 1790 waittime = MAX_BLOCKTIME;
539 1791
540 if (timercnt) 1792 if (timercnt)
541 { 1793 {
542 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1794 ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
543 if (block > to) block = to; 1795 if (waittime > to) waittime = to;
544 } 1796 }
545 1797
1798#if EV_PERIODIC_ENABLE
546 if (periodiccnt) 1799 if (periodiccnt)
547 { 1800 {
548 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1801 ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
549 if (block > to) block = to; 1802 if (waittime > to) waittime = to;
550 } 1803 }
1804#endif
551 1805
552 if (block < 0.) block = 0.; 1806 if (expect_false (waittime < timeout_blocktime))
1807 waittime = timeout_blocktime;
1808
1809 sleeptime = waittime - backend_fudge;
1810
1811 if (expect_true (sleeptime > io_blocktime))
1812 sleeptime = io_blocktime;
1813
1814 if (sleeptime)
1815 {
1816 ev_sleep (sleeptime);
1817 waittime -= sleeptime;
1818 }
553 } 1819 }
554 1820
555 method_poll (block); 1821 ++loop_count;
1822 backend_poll (EV_A_ waittime);
556 1823
557 /* update ev_now, do magic */ 1824 /* update ev_rt_now, do magic */
558 time_update (); 1825 time_update (EV_A_ waittime + sleeptime);
1826 }
559 1827
560 /* queue pending timers and reschedule them */ 1828 /* queue pending timers and reschedule them */
1829 timers_reify (EV_A); /* relative timers called last */
1830#if EV_PERIODIC_ENABLE
561 periodics_reify (); /* absolute timers first */ 1831 periodics_reify (EV_A); /* absolute timers called first */
562 timers_reify (); /* relative timers second */ 1832#endif
563 1833
1834#if EV_IDLE_ENABLE
564 /* queue idle watchers unless io or timers are pending */ 1835 /* queue idle watchers unless other events are pending */
565 if (!pendingcnt) 1836 idle_reify (EV_A);
566 queue_events ((W *)idles, idlecnt, EV_IDLE); 1837#endif
567 1838
568 /* queue check and possibly idle watchers */ 1839 /* queue check watchers, to be executed first */
1840 if (expect_false (checkcnt))
569 queue_events ((W *)checks, checkcnt, EV_CHECK); 1841 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
570 1842
571 call_pending (); 1843 call_pending (EV_A);
572 } 1844 }
573 while (!ev_loop_done); 1845 while (expect_true (
1846 activecnt
1847 && !loop_done
1848 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1849 ));
574 1850
575 if (ev_loop_done != 2) 1851 if (loop_done == EVUNLOOP_ONE)
1852 loop_done = EVUNLOOP_CANCEL;
1853}
1854
1855void
1856ev_unloop (EV_P_ int how)
1857{
576 ev_loop_done = 0; 1858 loop_done = how;
577} 1859}
578 1860
579/*****************************************************************************/ 1861/*****************************************************************************/
580 1862
581static void 1863void inline_size
582wlist_add (WL *head, WL elem) 1864wlist_add (WL *head, WL elem)
583{ 1865{
584 elem->next = *head; 1866 elem->next = *head;
585 *head = elem; 1867 *head = elem;
586} 1868}
587 1869
588static void 1870void inline_size
589wlist_del (WL *head, WL elem) 1871wlist_del (WL *head, WL elem)
590{ 1872{
591 while (*head) 1873 while (*head)
592 { 1874 {
593 if (*head == elem) 1875 if (*head == elem)
… …
598 1880
599 head = &(*head)->next; 1881 head = &(*head)->next;
600 } 1882 }
601} 1883}
602 1884
603static void 1885void inline_speed
1886clear_pending (EV_P_ W w)
1887{
1888 if (w->pending)
1889 {
1890 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1891 w->pending = 0;
1892 }
1893}
1894
1895int
1896ev_clear_pending (EV_P_ void *w)
1897{
1898 W w_ = (W)w;
1899 int pending = w_->pending;
1900
1901 if (expect_true (pending))
1902 {
1903 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1904 w_->pending = 0;
1905 p->w = 0;
1906 return p->events;
1907 }
1908 else
1909 return 0;
1910}
1911
1912void inline_size
1913pri_adjust (EV_P_ W w)
1914{
1915 int pri = w->priority;
1916 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1917 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1918 w->priority = pri;
1919}
1920
1921void inline_speed
604ev_start (W w, int active) 1922ev_start (EV_P_ W w, int active)
605{ 1923{
606 w->pending = 0; 1924 pri_adjust (EV_A_ w);
607 w->active = active; 1925 w->active = active;
1926 ev_ref (EV_A);
608} 1927}
609 1928
610static void 1929void inline_size
611ev_stop (W w) 1930ev_stop (EV_P_ W w)
612{ 1931{
613 if (w->pending) 1932 ev_unref (EV_A);
614 pendings [w->pending - 1].w = 0;
615
616 w->active = 0; 1933 w->active = 0;
617} 1934}
618 1935
619/*****************************************************************************/ 1936/*****************************************************************************/
620 1937
621void 1938void noinline
622evio_start (struct ev_io *w) 1939ev_io_start (EV_P_ ev_io *w)
623{ 1940{
1941 int fd = w->fd;
1942
624 if (ev_is_active (w)) 1943 if (expect_false (ev_is_active (w)))
625 return; 1944 return;
626 1945
627 int fd = w->fd; 1946 assert (("ev_io_start called with negative fd", fd >= 0));
628 1947
629 ev_start ((W)w, 1); 1948 ev_start (EV_A_ (W)w, 1);
630 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1949 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
631 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1950 wlist_add (&anfds[fd].head, (WL)w);
632 1951
633 ++fdchangecnt; 1952 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
634 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1953 w->events &= ~EV_IOFDSET;
635 fdchanges [fdchangecnt - 1] = fd;
636} 1954}
637 1955
638void 1956void noinline
639evio_stop (struct ev_io *w) 1957ev_io_stop (EV_P_ ev_io *w)
640{ 1958{
1959 clear_pending (EV_A_ (W)w);
641 if (!ev_is_active (w)) 1960 if (expect_false (!ev_is_active (w)))
642 return; 1961 return;
643 1962
1963 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1964
644 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1965 wlist_del (&anfds[w->fd].head, (WL)w);
645 ev_stop ((W)w); 1966 ev_stop (EV_A_ (W)w);
646 1967
647 ++fdchangecnt; 1968 fd_change (EV_A_ w->fd, 1);
648 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
649 fdchanges [fdchangecnt - 1] = w->fd;
650} 1969}
651 1970
652 1971void noinline
653void
654evtimer_start (struct ev_timer *w) 1972ev_timer_start (EV_P_ ev_timer *w)
655{ 1973{
656 if (ev_is_active (w)) 1974 if (expect_false (ev_is_active (w)))
657 return; 1975 return;
658 1976
659 w->at += now; 1977 ev_at (w) += mn_now;
660 1978
661 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1979 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
662 1980
663 ev_start ((W)w, ++timercnt); 1981 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
664 array_needsize (timers, timermax, timercnt, ); 1982 array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
665 timers [timercnt - 1] = w; 1983 timers [ev_active (w)] = (WT)w;
666 upheap ((WT *)timers, timercnt - 1); 1984 upheap (timers, ev_active (w));
667}
668 1985
669void 1986 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1987}
1988
1989void noinline
670evtimer_stop (struct ev_timer *w) 1990ev_timer_stop (EV_P_ ev_timer *w)
671{ 1991{
1992 clear_pending (EV_A_ (W)w);
672 if (!ev_is_active (w)) 1993 if (expect_false (!ev_is_active (w)))
673 return; 1994 return;
674 1995
675 if (w->active < timercnt--) 1996 {
1997 int active = ev_active (w);
1998
1999 assert (("internal timer heap corruption", timers [active] == (WT)w));
2000
2001 if (expect_true (active < timercnt + HEAP0 - 1))
676 { 2002 {
677 timers [w->active - 1] = timers [timercnt]; 2003 timers [active] = timers [timercnt + HEAP0 - 1];
678 downheap ((WT *)timers, timercnt, w->active - 1); 2004 adjustheap (timers, timercnt, active);
679 } 2005 }
680 2006
681 w->at = w->repeat; 2007 --timercnt;
2008 }
682 2009
2010 ev_at (w) -= mn_now;
2011
683 ev_stop ((W)w); 2012 ev_stop (EV_A_ (W)w);
684} 2013}
685 2014
686void 2015void noinline
687evtimer_again (struct ev_timer *w) 2016ev_timer_again (EV_P_ ev_timer *w)
688{ 2017{
689 if (ev_is_active (w)) 2018 if (ev_is_active (w))
690 { 2019 {
691 if (w->repeat) 2020 if (w->repeat)
692 { 2021 {
693 w->at = now + w->repeat; 2022 ev_at (w) = mn_now + w->repeat;
694 downheap ((WT *)timers, timercnt, w->active - 1); 2023 adjustheap (timers, timercnt, ev_active (w));
695 } 2024 }
696 else 2025 else
697 evtimer_stop (w); 2026 ev_timer_stop (EV_A_ w);
698 } 2027 }
699 else if (w->repeat) 2028 else if (w->repeat)
2029 {
2030 ev_at (w) = w->repeat;
700 evtimer_start (w); 2031 ev_timer_start (EV_A_ w);
2032 }
701} 2033}
702 2034
703void 2035#if EV_PERIODIC_ENABLE
2036void noinline
704evperiodic_start (struct ev_periodic *w) 2037ev_periodic_start (EV_P_ ev_periodic *w)
705{ 2038{
706 if (ev_is_active (w)) 2039 if (expect_false (ev_is_active (w)))
707 return; 2040 return;
708 2041
709 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2042 if (w->reschedule_cb)
710 2043 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2044 else if (w->interval)
2045 {
2046 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 */ 2047 /* 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; 2048 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2049 }
2050 else
2051 ev_at (w) = w->offset;
714 2052
715 ev_start ((W)w, ++periodiccnt); 2053 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
716 array_needsize (periodics, periodicmax, periodiccnt, ); 2054 array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
717 periodics [periodiccnt - 1] = w; 2055 periodics [ev_active (w)] = (WT)w;
718 upheap ((WT *)periodics, periodiccnt - 1); 2056 upheap (periodics, ev_active (w));
719}
720 2057
721void 2058 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
2059}
2060
2061void noinline
722evperiodic_stop (struct ev_periodic *w) 2062ev_periodic_stop (EV_P_ ev_periodic *w)
723{ 2063{
2064 clear_pending (EV_A_ (W)w);
724 if (!ev_is_active (w)) 2065 if (expect_false (!ev_is_active (w)))
725 return; 2066 return;
726 2067
727 if (w->active < periodiccnt--) 2068 {
2069 int active = ev_active (w);
2070
2071 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
2072
2073 if (expect_true (active < periodiccnt + HEAP0 - 1))
728 { 2074 {
729 periodics [w->active - 1] = periodics [periodiccnt]; 2075 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
730 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2076 adjustheap (periodics, periodiccnt, active);
731 } 2077 }
732 2078
2079 --periodiccnt;
2080 }
2081
733 ev_stop ((W)w); 2082 ev_stop (EV_A_ (W)w);
734} 2083}
735 2084
736void 2085void noinline
2086ev_periodic_again (EV_P_ ev_periodic *w)
2087{
2088 /* TODO: use adjustheap and recalculation */
2089 ev_periodic_stop (EV_A_ w);
2090 ev_periodic_start (EV_A_ w);
2091}
2092#endif
2093
2094#ifndef SA_RESTART
2095# define SA_RESTART 0
2096#endif
2097
2098void noinline
737evsignal_start (struct ev_signal *w) 2099ev_signal_start (EV_P_ ev_signal *w)
738{ 2100{
2101#if EV_MULTIPLICITY
2102 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2103#endif
739 if (ev_is_active (w)) 2104 if (expect_false (ev_is_active (w)))
740 return; 2105 return;
741 2106
742 ev_start ((W)w, 1); 2107 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2108
2109 evpipe_init (EV_A);
2110
2111 {
2112#ifndef _WIN32
2113 sigset_t full, prev;
2114 sigfillset (&full);
2115 sigprocmask (SIG_SETMASK, &full, &prev);
2116#endif
2117
743 array_needsize (signals, signalmax, w->signum, signals_init); 2118 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2119
2120#ifndef _WIN32
2121 sigprocmask (SIG_SETMASK, &prev, 0);
2122#endif
2123 }
2124
2125 ev_start (EV_A_ (W)w, 1);
744 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2126 wlist_add (&signals [w->signum - 1].head, (WL)w);
745 2127
746 if (!w->next) 2128 if (!((WL)w)->next)
747 { 2129 {
2130#if _WIN32
2131 signal (w->signum, ev_sighandler);
2132#else
748 struct sigaction sa; 2133 struct sigaction sa;
749 sa.sa_handler = sighandler; 2134 sa.sa_handler = ev_sighandler;
750 sigfillset (&sa.sa_mask); 2135 sigfillset (&sa.sa_mask);
751 sa.sa_flags = 0; 2136 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
752 sigaction (w->signum, &sa, 0); 2137 sigaction (w->signum, &sa, 0);
2138#endif
753 } 2139 }
754} 2140}
755 2141
756void 2142void noinline
757evsignal_stop (struct ev_signal *w) 2143ev_signal_stop (EV_P_ ev_signal *w)
758{ 2144{
2145 clear_pending (EV_A_ (W)w);
759 if (!ev_is_active (w)) 2146 if (expect_false (!ev_is_active (w)))
760 return; 2147 return;
761 2148
762 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2149 wlist_del (&signals [w->signum - 1].head, (WL)w);
763 ev_stop ((W)w); 2150 ev_stop (EV_A_ (W)w);
764 2151
765 if (!signals [w->signum - 1].head) 2152 if (!signals [w->signum - 1].head)
766 signal (w->signum, SIG_DFL); 2153 signal (w->signum, SIG_DFL);
767} 2154}
768 2155
769void evidle_start (struct ev_idle *w) 2156void
2157ev_child_start (EV_P_ ev_child *w)
770{ 2158{
2159#if EV_MULTIPLICITY
2160 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2161#endif
771 if (ev_is_active (w)) 2162 if (expect_false (ev_is_active (w)))
772 return; 2163 return;
773 2164
774 ev_start ((W)w, ++idlecnt); 2165 ev_start (EV_A_ (W)w, 1);
775 array_needsize (idles, idlemax, idlecnt, ); 2166 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
776 idles [idlecnt - 1] = w;
777} 2167}
778 2168
779void evidle_stop (struct ev_idle *w) 2169void
2170ev_child_stop (EV_P_ ev_child *w)
780{ 2171{
781 idles [w->active - 1] = idles [--idlecnt]; 2172 clear_pending (EV_A_ (W)w);
782 ev_stop ((W)w); 2173 if (expect_false (!ev_is_active (w)))
783}
784
785void evcheck_start (struct ev_check *w)
786{
787 if (ev_is_active (w))
788 return; 2174 return;
789 2175
2176 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2177 ev_stop (EV_A_ (W)w);
2178}
2179
2180#if EV_STAT_ENABLE
2181
2182# ifdef _WIN32
2183# undef lstat
2184# define lstat(a,b) _stati64 (a,b)
2185# endif
2186
2187#define DEF_STAT_INTERVAL 5.0074891
2188#define MIN_STAT_INTERVAL 0.1074891
2189
2190static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2191
2192#if EV_USE_INOTIFY
2193# define EV_INOTIFY_BUFSIZE 8192
2194
2195static void noinline
2196infy_add (EV_P_ ev_stat *w)
2197{
2198 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);
2199
2200 if (w->wd < 0)
2201 {
2202 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2203
2204 /* monitor some parent directory for speedup hints */
2205 /* note that exceeding the hardcoded limit is not a correctness issue, */
2206 /* but an efficiency issue only */
2207 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2208 {
2209 char path [4096];
2210 strcpy (path, w->path);
2211
2212 do
2213 {
2214 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2215 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2216
2217 char *pend = strrchr (path, '/');
2218
2219 if (!pend)
2220 break; /* whoops, no '/', complain to your admin */
2221
2222 *pend = 0;
2223 w->wd = inotify_add_watch (fs_fd, path, mask);
2224 }
2225 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2226 }
2227 }
2228 else
2229 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2230
2231 if (w->wd >= 0)
2232 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2233}
2234
2235static void noinline
2236infy_del (EV_P_ ev_stat *w)
2237{
2238 int slot;
2239 int wd = w->wd;
2240
2241 if (wd < 0)
2242 return;
2243
2244 w->wd = -2;
2245 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2246 wlist_del (&fs_hash [slot].head, (WL)w);
2247
2248 /* remove this watcher, if others are watching it, they will rearm */
2249 inotify_rm_watch (fs_fd, wd);
2250}
2251
2252static void noinline
2253infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2254{
2255 if (slot < 0)
2256 /* overflow, need to check for all hahs slots */
2257 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2258 infy_wd (EV_A_ slot, wd, ev);
2259 else
2260 {
2261 WL w_;
2262
2263 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2264 {
2265 ev_stat *w = (ev_stat *)w_;
2266 w_ = w_->next; /* lets us remove this watcher and all before it */
2267
2268 if (w->wd == wd || wd == -1)
2269 {
2270 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2271 {
2272 w->wd = -1;
2273 infy_add (EV_A_ w); /* re-add, no matter what */
2274 }
2275
2276 stat_timer_cb (EV_A_ &w->timer, 0);
2277 }
2278 }
2279 }
2280}
2281
2282static void
2283infy_cb (EV_P_ ev_io *w, int revents)
2284{
2285 char buf [EV_INOTIFY_BUFSIZE];
2286 struct inotify_event *ev = (struct inotify_event *)buf;
2287 int ofs;
2288 int len = read (fs_fd, buf, sizeof (buf));
2289
2290 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2291 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2292}
2293
2294void inline_size
2295infy_init (EV_P)
2296{
2297 if (fs_fd != -2)
2298 return;
2299
2300 fs_fd = inotify_init ();
2301
2302 if (fs_fd >= 0)
2303 {
2304 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2305 ev_set_priority (&fs_w, EV_MAXPRI);
2306 ev_io_start (EV_A_ &fs_w);
2307 }
2308}
2309
2310void inline_size
2311infy_fork (EV_P)
2312{
2313 int slot;
2314
2315 if (fs_fd < 0)
2316 return;
2317
2318 close (fs_fd);
2319 fs_fd = inotify_init ();
2320
2321 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2322 {
2323 WL w_ = fs_hash [slot].head;
2324 fs_hash [slot].head = 0;
2325
2326 while (w_)
2327 {
2328 ev_stat *w = (ev_stat *)w_;
2329 w_ = w_->next; /* lets us add this watcher */
2330
2331 w->wd = -1;
2332
2333 if (fs_fd >= 0)
2334 infy_add (EV_A_ w); /* re-add, no matter what */
2335 else
2336 ev_timer_start (EV_A_ &w->timer);
2337 }
2338
2339 }
2340}
2341
2342#endif
2343
2344void
2345ev_stat_stat (EV_P_ ev_stat *w)
2346{
2347 if (lstat (w->path, &w->attr) < 0)
2348 w->attr.st_nlink = 0;
2349 else if (!w->attr.st_nlink)
2350 w->attr.st_nlink = 1;
2351}
2352
2353static void noinline
2354stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2355{
2356 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2357
2358 /* we copy this here each the time so that */
2359 /* prev has the old value when the callback gets invoked */
2360 w->prev = w->attr;
2361 ev_stat_stat (EV_A_ w);
2362
2363 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2364 if (
2365 w->prev.st_dev != w->attr.st_dev
2366 || w->prev.st_ino != w->attr.st_ino
2367 || w->prev.st_mode != w->attr.st_mode
2368 || w->prev.st_nlink != w->attr.st_nlink
2369 || w->prev.st_uid != w->attr.st_uid
2370 || w->prev.st_gid != w->attr.st_gid
2371 || w->prev.st_rdev != w->attr.st_rdev
2372 || w->prev.st_size != w->attr.st_size
2373 || w->prev.st_atime != w->attr.st_atime
2374 || w->prev.st_mtime != w->attr.st_mtime
2375 || w->prev.st_ctime != w->attr.st_ctime
2376 ) {
2377 #if EV_USE_INOTIFY
2378 infy_del (EV_A_ w);
2379 infy_add (EV_A_ w);
2380 ev_stat_stat (EV_A_ w); /* avoid race... */
2381 #endif
2382
2383 ev_feed_event (EV_A_ w, EV_STAT);
2384 }
2385}
2386
2387void
2388ev_stat_start (EV_P_ ev_stat *w)
2389{
2390 if (expect_false (ev_is_active (w)))
2391 return;
2392
2393 /* since we use memcmp, we need to clear any padding data etc. */
2394 memset (&w->prev, 0, sizeof (ev_statdata));
2395 memset (&w->attr, 0, sizeof (ev_statdata));
2396
2397 ev_stat_stat (EV_A_ w);
2398
2399 if (w->interval < MIN_STAT_INTERVAL)
2400 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2401
2402 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2403 ev_set_priority (&w->timer, ev_priority (w));
2404
2405#if EV_USE_INOTIFY
2406 infy_init (EV_A);
2407
2408 if (fs_fd >= 0)
2409 infy_add (EV_A_ w);
2410 else
2411#endif
2412 ev_timer_start (EV_A_ &w->timer);
2413
2414 ev_start (EV_A_ (W)w, 1);
2415}
2416
2417void
2418ev_stat_stop (EV_P_ ev_stat *w)
2419{
2420 clear_pending (EV_A_ (W)w);
2421 if (expect_false (!ev_is_active (w)))
2422 return;
2423
2424#if EV_USE_INOTIFY
2425 infy_del (EV_A_ w);
2426#endif
2427 ev_timer_stop (EV_A_ &w->timer);
2428
2429 ev_stop (EV_A_ (W)w);
2430}
2431#endif
2432
2433#if EV_IDLE_ENABLE
2434void
2435ev_idle_start (EV_P_ ev_idle *w)
2436{
2437 if (expect_false (ev_is_active (w)))
2438 return;
2439
2440 pri_adjust (EV_A_ (W)w);
2441
2442 {
2443 int active = ++idlecnt [ABSPRI (w)];
2444
2445 ++idleall;
2446 ev_start (EV_A_ (W)w, active);
2447
2448 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2449 idles [ABSPRI (w)][active - 1] = w;
2450 }
2451}
2452
2453void
2454ev_idle_stop (EV_P_ ev_idle *w)
2455{
2456 clear_pending (EV_A_ (W)w);
2457 if (expect_false (!ev_is_active (w)))
2458 return;
2459
2460 {
2461 int active = ev_active (w);
2462
2463 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2464 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2465
2466 ev_stop (EV_A_ (W)w);
2467 --idleall;
2468 }
2469}
2470#endif
2471
2472void
2473ev_prepare_start (EV_P_ ev_prepare *w)
2474{
2475 if (expect_false (ev_is_active (w)))
2476 return;
2477
2478 ev_start (EV_A_ (W)w, ++preparecnt);
2479 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2480 prepares [preparecnt - 1] = w;
2481}
2482
2483void
2484ev_prepare_stop (EV_P_ ev_prepare *w)
2485{
2486 clear_pending (EV_A_ (W)w);
2487 if (expect_false (!ev_is_active (w)))
2488 return;
2489
2490 {
2491 int active = ev_active (w);
2492
2493 prepares [active - 1] = prepares [--preparecnt];
2494 ev_active (prepares [active - 1]) = active;
2495 }
2496
2497 ev_stop (EV_A_ (W)w);
2498}
2499
2500void
2501ev_check_start (EV_P_ ev_check *w)
2502{
2503 if (expect_false (ev_is_active (w)))
2504 return;
2505
790 ev_start ((W)w, ++checkcnt); 2506 ev_start (EV_A_ (W)w, ++checkcnt);
791 array_needsize (checks, checkmax, checkcnt, ); 2507 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
792 checks [checkcnt - 1] = w; 2508 checks [checkcnt - 1] = w;
793} 2509}
794 2510
2511void
795void evcheck_stop (struct ev_check *w) 2512ev_check_stop (EV_P_ ev_check *w)
796{ 2513{
2514 clear_pending (EV_A_ (W)w);
2515 if (expect_false (!ev_is_active (w)))
2516 return;
2517
2518 {
2519 int active = ev_active (w);
2520
797 checks [w->active - 1] = checks [--checkcnt]; 2521 checks [active - 1] = checks [--checkcnt];
2522 ev_active (checks [active - 1]) = active;
2523 }
2524
798 ev_stop ((W)w); 2525 ev_stop (EV_A_ (W)w);
799} 2526}
2527
2528#if EV_EMBED_ENABLE
2529void noinline
2530ev_embed_sweep (EV_P_ ev_embed *w)
2531{
2532 ev_loop (w->other, EVLOOP_NONBLOCK);
2533}
2534
2535static void
2536embed_io_cb (EV_P_ ev_io *io, int revents)
2537{
2538 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2539
2540 if (ev_cb (w))
2541 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2542 else
2543 ev_loop (w->other, EVLOOP_NONBLOCK);
2544}
2545
2546static void
2547embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2548{
2549 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2550
2551 {
2552 struct ev_loop *loop = w->other;
2553
2554 while (fdchangecnt)
2555 {
2556 fd_reify (EV_A);
2557 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2558 }
2559 }
2560}
2561
2562#if 0
2563static void
2564embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2565{
2566 ev_idle_stop (EV_A_ idle);
2567}
2568#endif
2569
2570void
2571ev_embed_start (EV_P_ ev_embed *w)
2572{
2573 if (expect_false (ev_is_active (w)))
2574 return;
2575
2576 {
2577 struct ev_loop *loop = w->other;
2578 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2579 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2580 }
2581
2582 ev_set_priority (&w->io, ev_priority (w));
2583 ev_io_start (EV_A_ &w->io);
2584
2585 ev_prepare_init (&w->prepare, embed_prepare_cb);
2586 ev_set_priority (&w->prepare, EV_MINPRI);
2587 ev_prepare_start (EV_A_ &w->prepare);
2588
2589 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2590
2591 ev_start (EV_A_ (W)w, 1);
2592}
2593
2594void
2595ev_embed_stop (EV_P_ ev_embed *w)
2596{
2597 clear_pending (EV_A_ (W)w);
2598 if (expect_false (!ev_is_active (w)))
2599 return;
2600
2601 ev_io_stop (EV_A_ &w->io);
2602 ev_prepare_stop (EV_A_ &w->prepare);
2603
2604 ev_stop (EV_A_ (W)w);
2605}
2606#endif
2607
2608#if EV_FORK_ENABLE
2609void
2610ev_fork_start (EV_P_ ev_fork *w)
2611{
2612 if (expect_false (ev_is_active (w)))
2613 return;
2614
2615 ev_start (EV_A_ (W)w, ++forkcnt);
2616 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2617 forks [forkcnt - 1] = w;
2618}
2619
2620void
2621ev_fork_stop (EV_P_ ev_fork *w)
2622{
2623 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w)))
2625 return;
2626
2627 {
2628 int active = ev_active (w);
2629
2630 forks [active - 1] = forks [--forkcnt];
2631 ev_active (forks [active - 1]) = active;
2632 }
2633
2634 ev_stop (EV_A_ (W)w);
2635}
2636#endif
2637
2638#if EV_ASYNC_ENABLE
2639void
2640ev_async_start (EV_P_ ev_async *w)
2641{
2642 if (expect_false (ev_is_active (w)))
2643 return;
2644
2645 evpipe_init (EV_A);
2646
2647 ev_start (EV_A_ (W)w, ++asynccnt);
2648 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2649 asyncs [asynccnt - 1] = w;
2650}
2651
2652void
2653ev_async_stop (EV_P_ ev_async *w)
2654{
2655 clear_pending (EV_A_ (W)w);
2656 if (expect_false (!ev_is_active (w)))
2657 return;
2658
2659 {
2660 int active = ev_active (w);
2661
2662 asyncs [active - 1] = asyncs [--asynccnt];
2663 ev_active (asyncs [active - 1]) = active;
2664 }
2665
2666 ev_stop (EV_A_ (W)w);
2667}
2668
2669void
2670ev_async_send (EV_P_ ev_async *w)
2671{
2672 w->sent = 1;
2673 evpipe_write (EV_A_ &gotasync);
2674}
2675#endif
800 2676
801/*****************************************************************************/ 2677/*****************************************************************************/
802 2678
803#if 0 2679struct ev_once
804 2680{
805struct ev_io wio; 2681 ev_io io;
2682 ev_timer to;
2683 void (*cb)(int revents, void *arg);
2684 void *arg;
2685};
806 2686
807static void 2687static void
808sin_cb (struct ev_io *w, int revents) 2688once_cb (EV_P_ struct ev_once *once, int revents)
809{ 2689{
810 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 2690 void (*cb)(int revents, void *arg) = once->cb;
2691 void *arg = once->arg;
2692
2693 ev_io_stop (EV_A_ &once->io);
2694 ev_timer_stop (EV_A_ &once->to);
2695 ev_free (once);
2696
2697 cb (revents, arg);
811} 2698}
812 2699
813static void 2700static void
814ocb (struct ev_timer *w, int revents) 2701once_cb_io (EV_P_ ev_io *w, int revents)
815{ 2702{
816 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 2703 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
817 evtimer_stop (w);
818 evtimer_start (w);
819} 2704}
820 2705
821static void 2706static void
822scb (struct ev_signal *w, int revents) 2707once_cb_to (EV_P_ ev_timer *w, int revents)
823{ 2708{
824 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 2709 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
825 evio_stop (&wio);
826 evio_start (&wio);
827} 2710}
828 2711
829static void 2712void
830gcb (struct ev_signal *w, int revents) 2713ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
831{ 2714{
832 fprintf (stderr, "generic %x\n", revents); 2715 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
833 2716
834} 2717 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 } 2718 {
856#endif 2719 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; 2720 return;
877} 2721 }
878 2722
879#endif 2723 once->cb = cb;
2724 once->arg = arg;
880 2725
2726 ev_init (&once->io, once_cb_io);
2727 if (fd >= 0)
2728 {
2729 ev_io_set (&once->io, fd, events);
2730 ev_io_start (EV_A_ &once->io);
2731 }
881 2732
2733 ev_init (&once->to, once_cb_to);
2734 if (timeout >= 0.)
2735 {
2736 ev_timer_set (&once->to, timeout, 0.);
2737 ev_timer_start (EV_A_ &once->to);
2738 }
2739}
882 2740
2741#if EV_MULTIPLICITY
2742 #include "ev_wrap.h"
2743#endif
883 2744
2745#ifdef __cplusplus
2746}
2747#endif
2748

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