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Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.227 by root, Fri May 2 07:20:01 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * 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.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 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
29 133
30#include <math.h> 134#include <math.h>
31#include <stdlib.h> 135#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h> 136#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 137#include <stddef.h>
36 138
37#include <stdio.h> 139#include <stdio.h>
38 140
39#include <assert.h> 141#include <assert.h>
40#include <errno.h> 142#include <errno.h>
41#include <sys/time.h> 143#include <sys/types.h>
42#include <time.h> 144#include <time.h>
43 145
44#ifndef HAVE_MONOTONIC 146#include <signal.h>
45# ifdef CLOCK_MONOTONIC 147
46# define HAVE_MONOTONIC 1 148#ifdef EV_H
149# include EV_H
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
47# endif 163# endif
48#endif 164#endif
49 165
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
50#ifndef HAVE_SELECT 180#ifndef EV_USE_SELECT
51# 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
52#endif 189# endif
190#endif
53 191
54#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
55# define HAVE_EPOLL 0 196# define EV_USE_EPOLL 0
56#endif 197# endif
198#endif
57 199
58#ifndef HAVE_REALTIME 200#ifndef EV_USE_KQUEUE
59# 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
60#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 */
61 294
62#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) */
63#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 */
64 298
65#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
66 309
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
67typedef struct ev_watcher *W; 326typedef ev_watcher *W;
68typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
69typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
70 329
71static ev_tstamp now, diff; /* monotonic clock */ 330#if EV_USE_MONOTONIC
331/* sig_atomic_t is used to avoid per-thread variables or locking but still */
332/* giving it a reasonably high chance of working on typical architetcures */
333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
334#endif
335
336#ifdef _WIN32
337# include "ev_win32.c"
338#endif
339
340/*****************************************************************************/
341
342static void (*syserr_cb)(const char *msg);
343
344void
345ev_set_syserr_cb (void (*cb)(const char *msg))
346{
347 syserr_cb = cb;
348}
349
350static void noinline
351syserr (const char *msg)
352{
353 if (!msg)
354 msg = "(libev) system error";
355
356 if (syserr_cb)
357 syserr_cb (msg);
358 else
359 {
360 perror (msg);
361 abort ();
362 }
363}
364
365static void *
366ev_realloc_emul (void *ptr, long size)
367{
368 /* some systems, notably openbsd and darwin, fail to properly
369 * implement realloc (x, 0) (as required by both ansi c-98 and
370 * the single unix specification, so work around them here.
371 */
372
373 if (size)
374 return realloc (ptr, size);
375
376 free (ptr);
377 return 0;
378}
379
380static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
381
382void
383ev_set_allocator (void *(*cb)(void *ptr, long size))
384{
385 alloc = cb;
386}
387
388inline_speed void *
389ev_realloc (void *ptr, long size)
390{
391 ptr = alloc (ptr, size);
392
393 if (!ptr && size)
394 {
395 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
396 abort ();
397 }
398
399 return ptr;
400}
401
402#define ev_malloc(size) ev_realloc (0, (size))
403#define ev_free(ptr) ev_realloc ((ptr), 0)
404
405/*****************************************************************************/
406
407typedef struct
408{
409 WL head;
410 unsigned char events;
411 unsigned char reify;
412#if EV_SELECT_IS_WINSOCKET
413 SOCKET handle;
414#endif
415} ANFD;
416
417typedef struct
418{
419 W w;
420 int events;
421} ANPENDING;
422
423#if EV_USE_INOTIFY
424typedef struct
425{
426 WL head;
427} ANFS;
428#endif
429
430#if EV_MULTIPLICITY
431
432 struct ev_loop
433 {
434 ev_tstamp ev_rt_now;
435 #define ev_rt_now ((loop)->ev_rt_now)
436 #define VAR(name,decl) decl;
437 #include "ev_vars.h"
438 #undef VAR
439 };
440 #include "ev_wrap.h"
441
442 static struct ev_loop default_loop_struct;
443 struct ev_loop *ev_default_loop_ptr;
444
445#else
446
72ev_tstamp ev_now; 447 ev_tstamp ev_rt_now;
73int ev_method; 448 #define VAR(name,decl) static decl;
449 #include "ev_vars.h"
450 #undef VAR
74 451
75static int have_monotonic; /* runtime */ 452 static int ev_default_loop_ptr;
76 453
77static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 454#endif
78static void (*method_modify)(int fd, int oev, int nev);
79static void (*method_poll)(ev_tstamp timeout);
80 455
81/*****************************************************************************/ 456/*****************************************************************************/
82 457
83ev_tstamp 458ev_tstamp
84ev_time (void) 459ev_time (void)
85{ 460{
86#if HAVE_REALTIME 461#if EV_USE_REALTIME
87 struct timespec ts; 462 struct timespec ts;
88 clock_gettime (CLOCK_REALTIME, &ts); 463 clock_gettime (CLOCK_REALTIME, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 464 return ts.tv_sec + ts.tv_nsec * 1e-9;
90#else 465#else
91 struct timeval tv; 466 struct timeval tv;
92 gettimeofday (&tv, 0); 467 gettimeofday (&tv, 0);
93 return tv.tv_sec + tv.tv_usec * 1e-6; 468 return tv.tv_sec + tv.tv_usec * 1e-6;
94#endif 469#endif
95} 470}
96 471
97static ev_tstamp 472ev_tstamp inline_size
98get_clock (void) 473get_clock (void)
99{ 474{
100#if HAVE_MONOTONIC 475#if EV_USE_MONOTONIC
101 if (have_monotonic) 476 if (expect_true (have_monotonic))
102 { 477 {
103 struct timespec ts; 478 struct timespec ts;
104 clock_gettime (CLOCK_MONOTONIC, &ts); 479 clock_gettime (CLOCK_MONOTONIC, &ts);
105 return ts.tv_sec + ts.tv_nsec * 1e-9; 480 return ts.tv_sec + ts.tv_nsec * 1e-9;
106 } 481 }
107#endif 482#endif
108 483
109 return ev_time (); 484 return ev_time ();
110} 485}
111 486
112#define array_needsize(base,cur,cnt,init) \ 487#if EV_MULTIPLICITY
113 if ((cnt) > cur) \ 488ev_tstamp
114 { \ 489ev_now (EV_P)
115 int newcnt = cur ? cur << 1 : 16; \ 490{
116 base = realloc (base, sizeof (*base) * (newcnt)); \ 491 return ev_rt_now;
117 init (base + cur, newcnt - cur); \ 492}
118 cur = newcnt; \ 493#endif
494
495void
496ev_sleep (ev_tstamp delay)
497{
498 if (delay > 0.)
119 } 499 {
500#if EV_USE_NANOSLEEP
501 struct timespec ts;
502
503 ts.tv_sec = (time_t)delay;
504 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
505
506 nanosleep (&ts, 0);
507#elif defined(_WIN32)
508 Sleep ((unsigned long)(delay * 1e3));
509#else
510 struct timeval tv;
511
512 tv.tv_sec = (time_t)delay;
513 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
514
515 select (0, 0, 0, 0, &tv);
516#endif
517 }
518}
120 519
121/*****************************************************************************/ 520/*****************************************************************************/
122 521
522int inline_size
523array_nextsize (int elem, int cur, int cnt)
524{
525 int ncur = cur + 1;
526
527 do
528 ncur <<= 1;
529 while (cnt > ncur);
530
531 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
532 if (elem * ncur > 4096)
533 {
534 ncur *= elem;
535 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
536 ncur = ncur - sizeof (void *) * 4;
537 ncur /= elem;
538 }
539
540 return ncur;
541}
542
543static noinline void *
544array_realloc (int elem, void *base, int *cur, int cnt)
545{
546 *cur = array_nextsize (elem, *cur, cnt);
547 return ev_realloc (base, elem * *cur);
548}
549
550#define array_needsize(type,base,cur,cnt,init) \
551 if (expect_false ((cnt) > (cur))) \
552 { \
553 int ocur_ = (cur); \
554 (base) = (type *)array_realloc \
555 (sizeof (type), (base), &(cur), (cnt)); \
556 init ((base) + (ocur_), (cur) - ocur_); \
557 }
558
559#if 0
560#define array_slim(type,stem) \
561 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
562 { \
563 stem ## max = array_roundsize (stem ## cnt >> 1); \
564 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
565 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
566 }
567#endif
568
569#define array_free(stem, idx) \
570 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
571
572/*****************************************************************************/
573
574void noinline
575ev_feed_event (EV_P_ void *w, int revents)
576{
577 W w_ = (W)w;
578 int pri = ABSPRI (w_);
579
580 if (expect_false (w_->pending))
581 pendings [pri][w_->pending - 1].events |= revents;
582 else
583 {
584 w_->pending = ++pendingcnt [pri];
585 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
586 pendings [pri][w_->pending - 1].w = w_;
587 pendings [pri][w_->pending - 1].events = revents;
588 }
589}
590
591void inline_speed
592queue_events (EV_P_ W *events, int eventcnt, int type)
593{
594 int i;
595
596 for (i = 0; i < eventcnt; ++i)
597 ev_feed_event (EV_A_ events [i], type);
598}
599
600/*****************************************************************************/
601
602void inline_size
603anfds_init (ANFD *base, int count)
604{
605 while (count--)
606 {
607 base->head = 0;
608 base->events = EV_NONE;
609 base->reify = 0;
610
611 ++base;
612 }
613}
614
615void inline_speed
616fd_event (EV_P_ int fd, int revents)
617{
618 ANFD *anfd = anfds + fd;
619 ev_io *w;
620
621 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
622 {
623 int ev = w->events & revents;
624
625 if (ev)
626 ev_feed_event (EV_A_ (W)w, ev);
627 }
628}
629
630void
631ev_feed_fd_event (EV_P_ int fd, int revents)
632{
633 if (fd >= 0 && fd < anfdmax)
634 fd_event (EV_A_ fd, revents);
635}
636
637void inline_size
638fd_reify (EV_P)
639{
640 int i;
641
642 for (i = 0; i < fdchangecnt; ++i)
643 {
644 int fd = fdchanges [i];
645 ANFD *anfd = anfds + fd;
646 ev_io *w;
647
648 unsigned char events = 0;
649
650 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
651 events |= (unsigned char)w->events;
652
653#if EV_SELECT_IS_WINSOCKET
654 if (events)
655 {
656 unsigned long argp;
657 #ifdef EV_FD_TO_WIN32_HANDLE
658 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
659 #else
660 anfd->handle = _get_osfhandle (fd);
661 #endif
662 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
663 }
664#endif
665
666 {
667 unsigned char o_events = anfd->events;
668 unsigned char o_reify = anfd->reify;
669
670 anfd->reify = 0;
671 anfd->events = events;
672
673 if (o_events != events || o_reify & EV_IOFDSET)
674 backend_modify (EV_A_ fd, o_events, events);
675 }
676 }
677
678 fdchangecnt = 0;
679}
680
681void inline_size
682fd_change (EV_P_ int fd, int flags)
683{
684 unsigned char reify = anfds [fd].reify;
685 anfds [fd].reify |= flags;
686
687 if (expect_true (!reify))
688 {
689 ++fdchangecnt;
690 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
691 fdchanges [fdchangecnt - 1] = fd;
692 }
693}
694
695void inline_speed
696fd_kill (EV_P_ int fd)
697{
698 ev_io *w;
699
700 while ((w = (ev_io *)anfds [fd].head))
701 {
702 ev_io_stop (EV_A_ w);
703 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
704 }
705}
706
707int inline_size
708fd_valid (int fd)
709{
710#ifdef _WIN32
711 return _get_osfhandle (fd) != -1;
712#else
713 return fcntl (fd, F_GETFD) != -1;
714#endif
715}
716
717/* called on EBADF to verify fds */
718static void noinline
719fd_ebadf (EV_P)
720{
721 int fd;
722
723 for (fd = 0; fd < anfdmax; ++fd)
724 if (anfds [fd].events)
725 if (!fd_valid (fd) == -1 && errno == EBADF)
726 fd_kill (EV_A_ fd);
727}
728
729/* called on ENOMEM in select/poll to kill some fds and retry */
730static void noinline
731fd_enomem (EV_P)
732{
733 int fd;
734
735 for (fd = anfdmax; fd--; )
736 if (anfds [fd].events)
737 {
738 fd_kill (EV_A_ fd);
739 return;
740 }
741}
742
743/* usually called after fork if backend needs to re-arm all fds from scratch */
744static void noinline
745fd_rearm_all (EV_P)
746{
747 int fd;
748
749 for (fd = 0; fd < anfdmax; ++fd)
750 if (anfds [fd].events)
751 {
752 anfds [fd].events = 0;
753 fd_change (EV_A_ fd, EV_IOFDSET | 1);
754 }
755}
756
757/*****************************************************************************/
758
759/* towards the root */
760void inline_speed
761upheap (WT *heap, int k)
762{
763 WT w = heap [k];
764
765 while (k)
766 {
767 int p = (k - 1) >> 1;
768
769 if (heap [p]->at <= w->at)
770 break;
771
772 heap [k] = heap [p];
773 ((W)heap [k])->active = k + 1;
774 k = p;
775 }
776
777 heap [k] = w;
778 ((W)heap [k])->active = k + 1;
779}
780
781/* away from the root */
782void inline_speed
783downheap (WT *heap, int N, int k)
784{
785 WT w = heap [k];
786
787 for (;;)
788 {
789 int c = (k << 1) + 1;
790
791 if (c >= N)
792 break;
793
794 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
795 ? 1 : 0;
796
797 if (w->at <= heap [c]->at)
798 break;
799
800 heap [k] = heap [c];
801 ((W)heap [k])->active = k + 1;
802
803 k = c;
804 }
805
806 heap [k] = w;
807 ((W)heap [k])->active = k + 1;
808}
809
810void inline_size
811adjustheap (WT *heap, int N, int k)
812{
813 upheap (heap, k);
814 downheap (heap, N, k);
815}
816
817/*****************************************************************************/
818
123typedef struct 819typedef struct
124{ 820{
125 struct ev_io *head; 821 WL head;
126 unsigned char wev, rev; /* want, received event set */ 822 EV_ATOMIC_T gotsig;
127} ANFD;
128
129static ANFD *anfds;
130static int anfdmax;
131
132static int *fdchanges;
133static int fdchangemax, fdchangecnt;
134
135static void
136anfds_init (ANFD *base, int count)
137{
138 while (count--)
139 {
140 base->head = 0;
141 base->wev = base->rev = EV_NONE;
142 ++base;
143 }
144}
145
146typedef struct
147{
148 W w;
149 int events;
150} ANPENDING;
151
152static ANPENDING *pendings;
153static int pendingmax, pendingcnt;
154
155static void
156event (W w, int events)
157{
158 if (w->active)
159 {
160 w->pending = ++pendingcnt;
161 array_needsize (pendings, pendingmax, pendingcnt, );
162 pendings [pendingcnt - 1].w = w;
163 pendings [pendingcnt - 1].events = events;
164 }
165}
166
167static void
168fd_event (int fd, int events)
169{
170 ANFD *anfd = anfds + fd;
171 struct ev_io *w;
172
173 for (w = anfd->head; w; w = w->next)
174 {
175 int ev = w->events & events;
176
177 if (ev)
178 event ((W)w, ev);
179 }
180}
181
182static void
183queue_events (W *events, int eventcnt, int type)
184{
185 int i;
186
187 for (i = 0; i < eventcnt; ++i)
188 event (events [i], type);
189}
190
191/* called on EBADF to verify fds */
192static void
193fd_recheck ()
194{
195 int fd;
196
197 for (fd = 0; fd < anfdmax; ++fd)
198 if (anfds [fd].wev)
199 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200 while (anfds [fd].head)
201 evio_stop (anfds [fd].head);
202}
203
204/*****************************************************************************/
205
206static struct ev_timer **timers;
207static int timermax, timercnt;
208
209static struct ev_periodic **periodics;
210static int periodicmax, periodiccnt;
211
212static void
213upheap (WT *timers, int k)
214{
215 WT w = timers [k];
216
217 while (k && timers [k >> 1]->at > w->at)
218 {
219 timers [k] = timers [k >> 1];
220 timers [k]->active = k + 1;
221 k >>= 1;
222 }
223
224 timers [k] = w;
225 timers [k]->active = k + 1;
226
227}
228
229static void
230downheap (WT *timers, int N, int k)
231{
232 WT w = timers [k];
233
234 while (k < (N >> 1))
235 {
236 int j = k << 1;
237
238 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239 ++j;
240
241 if (w->at <= timers [j]->at)
242 break;
243
244 timers [k] = timers [j];
245 timers [k]->active = k + 1;
246 k = j;
247 }
248
249 timers [k] = w;
250 timers [k]->active = k + 1;
251}
252
253/*****************************************************************************/
254
255typedef struct
256{
257 struct ev_signal *head;
258 sig_atomic_t gotsig;
259} ANSIG; 823} ANSIG;
260 824
261static ANSIG *signals; 825static ANSIG *signals;
262static int signalmax; 826static int signalmax;
263 827
264static int sigpipe [2]; 828static EV_ATOMIC_T gotsig;
265static sig_atomic_t gotsig;
266static struct ev_io sigev;
267 829
268static void 830void inline_size
269signals_init (ANSIG *base, int count) 831signals_init (ANSIG *base, int count)
270{ 832{
271 while (count--) 833 while (count--)
272 { 834 {
273 base->head = 0; 835 base->head = 0;
274 base->gotsig = 0; 836 base->gotsig = 0;
837
275 ++base; 838 ++base;
276 } 839 }
277} 840}
278 841
842/*****************************************************************************/
843
844void inline_speed
845fd_intern (int fd)
846{
847#ifdef _WIN32
848 int arg = 1;
849 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
850#else
851 fcntl (fd, F_SETFD, FD_CLOEXEC);
852 fcntl (fd, F_SETFL, O_NONBLOCK);
853#endif
854}
855
856static void noinline
857evpipe_init (EV_P)
858{
859 if (!ev_is_active (&pipeev))
860 {
861#if EV_USE_EVENTFD
862 if ((evfd = eventfd (0, 0)) >= 0)
863 {
864 evpipe [0] = -1;
865 fd_intern (evfd);
866 ev_io_set (&pipeev, evfd, EV_READ);
867 }
868 else
869#endif
870 {
871 while (pipe (evpipe))
872 syserr ("(libev) error creating signal/async pipe");
873
874 fd_intern (evpipe [0]);
875 fd_intern (evpipe [1]);
876 ev_io_set (&pipeev, evpipe [0], EV_READ);
877 }
878
879 ev_io_start (EV_A_ &pipeev);
880 ev_unref (EV_A); /* watcher should not keep loop alive */
881 }
882}
883
884void inline_size
885evpipe_write (EV_P_ EV_ATOMIC_T *flag)
886{
887 if (!*flag)
888 {
889 int old_errno = errno; /* save errno because write might clobber it */
890
891 *flag = 1;
892
893#if EV_USE_EVENTFD
894 if (evfd >= 0)
895 {
896 uint64_t counter = 1;
897 write (evfd, &counter, sizeof (uint64_t));
898 }
899 else
900#endif
901 write (evpipe [1], &old_errno, 1);
902
903 errno = old_errno;
904 }
905}
906
279static void 907static void
908pipecb (EV_P_ ev_io *iow, int revents)
909{
910#if EV_USE_EVENTFD
911 if (evfd >= 0)
912 {
913 uint64_t counter = 1;
914 read (evfd, &counter, sizeof (uint64_t));
915 }
916 else
917#endif
918 {
919 char dummy;
920 read (evpipe [0], &dummy, 1);
921 }
922
923 if (gotsig && ev_is_default_loop (EV_A))
924 {
925 int signum;
926 gotsig = 0;
927
928 for (signum = signalmax; signum--; )
929 if (signals [signum].gotsig)
930 ev_feed_signal_event (EV_A_ signum + 1);
931 }
932
933#if EV_ASYNC_ENABLE
934 if (gotasync)
935 {
936 int i;
937 gotasync = 0;
938
939 for (i = asynccnt; i--; )
940 if (asyncs [i]->sent)
941 {
942 asyncs [i]->sent = 0;
943 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
944 }
945 }
946#endif
947}
948
949/*****************************************************************************/
950
951static void
280sighandler (int signum) 952ev_sighandler (int signum)
281{ 953{
954#if EV_MULTIPLICITY
955 struct ev_loop *loop = &default_loop_struct;
956#endif
957
958#if _WIN32
959 signal (signum, ev_sighandler);
960#endif
961
282 signals [signum - 1].gotsig = 1; 962 signals [signum - 1].gotsig = 1;
963 evpipe_write (EV_A_ &gotsig);
964}
283 965
284 if (!gotsig) 966void noinline
967ev_feed_signal_event (EV_P_ int signum)
968{
969 WL w;
970
971#if EV_MULTIPLICITY
972 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
973#endif
974
975 --signum;
976
977 if (signum < 0 || signum >= signalmax)
978 return;
979
980 signals [signum].gotsig = 0;
981
982 for (w = signals [signum].head; w; w = w->next)
983 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
984}
985
986/*****************************************************************************/
987
988static WL childs [EV_PID_HASHSIZE];
989
990#ifndef _WIN32
991
992static ev_signal childev;
993
994#ifndef WIFCONTINUED
995# define WIFCONTINUED(status) 0
996#endif
997
998void inline_speed
999child_reap (EV_P_ int chain, int pid, int status)
1000{
1001 ev_child *w;
1002 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1003
1004 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1005 {
1006 if ((w->pid == pid || !w->pid)
1007 && (!traced || (w->flags & 1)))
1008 {
1009 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1010 w->rpid = pid;
1011 w->rstatus = status;
1012 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1013 }
1014 }
1015}
1016
1017#ifndef WCONTINUED
1018# define WCONTINUED 0
1019#endif
1020
1021static void
1022childcb (EV_P_ ev_signal *sw, int revents)
1023{
1024 int pid, status;
1025
1026 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1027 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1028 if (!WCONTINUED
1029 || errno != EINVAL
1030 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1031 return;
1032
1033 /* make sure we are called again until all children have been reaped */
1034 /* we need to do it this way so that the callback gets called before we continue */
1035 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1036
1037 child_reap (EV_A_ pid, pid, status);
1038 if (EV_PID_HASHSIZE > 1)
1039 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1040}
1041
1042#endif
1043
1044/*****************************************************************************/
1045
1046#if EV_USE_PORT
1047# include "ev_port.c"
1048#endif
1049#if EV_USE_KQUEUE
1050# include "ev_kqueue.c"
1051#endif
1052#if EV_USE_EPOLL
1053# include "ev_epoll.c"
1054#endif
1055#if EV_USE_POLL
1056# include "ev_poll.c"
1057#endif
1058#if EV_USE_SELECT
1059# include "ev_select.c"
1060#endif
1061
1062int
1063ev_version_major (void)
1064{
1065 return EV_VERSION_MAJOR;
1066}
1067
1068int
1069ev_version_minor (void)
1070{
1071 return EV_VERSION_MINOR;
1072}
1073
1074/* return true if we are running with elevated privileges and should ignore env variables */
1075int inline_size
1076enable_secure (void)
1077{
1078#ifdef _WIN32
1079 return 0;
1080#else
1081 return getuid () != geteuid ()
1082 || getgid () != getegid ();
1083#endif
1084}
1085
1086unsigned int
1087ev_supported_backends (void)
1088{
1089 unsigned int flags = 0;
1090
1091 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1092 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1093 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1094 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1095 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1096
1097 return flags;
1098}
1099
1100unsigned int
1101ev_recommended_backends (void)
1102{
1103 unsigned int flags = ev_supported_backends ();
1104
1105#ifndef __NetBSD__
1106 /* kqueue is borked on everything but netbsd apparently */
1107 /* it usually doesn't work correctly on anything but sockets and pipes */
1108 flags &= ~EVBACKEND_KQUEUE;
1109#endif
1110#ifdef __APPLE__
1111 // flags &= ~EVBACKEND_KQUEUE; for documentation
1112 flags &= ~EVBACKEND_POLL;
1113#endif
1114
1115 return flags;
1116}
1117
1118unsigned int
1119ev_embeddable_backends (void)
1120{
1121 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1122
1123 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1124 /* please fix it and tell me how to detect the fix */
1125 flags &= ~EVBACKEND_EPOLL;
1126
1127 return flags;
1128}
1129
1130unsigned int
1131ev_backend (EV_P)
1132{
1133 return backend;
1134}
1135
1136unsigned int
1137ev_loop_count (EV_P)
1138{
1139 return loop_count;
1140}
1141
1142void
1143ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1144{
1145 io_blocktime = interval;
1146}
1147
1148void
1149ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1150{
1151 timeout_blocktime = interval;
1152}
1153
1154static void noinline
1155loop_init (EV_P_ unsigned int flags)
1156{
1157 if (!backend)
1158 {
1159#if EV_USE_MONOTONIC
285 { 1160 {
1161 struct timespec ts;
1162 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1163 have_monotonic = 1;
1164 }
1165#endif
1166
1167 ev_rt_now = ev_time ();
1168 mn_now = get_clock ();
1169 now_floor = mn_now;
1170 rtmn_diff = ev_rt_now - mn_now;
1171
1172 io_blocktime = 0.;
1173 timeout_blocktime = 0.;
1174 backend = 0;
1175 backend_fd = -1;
1176 gotasync = 0;
1177#if EV_USE_INOTIFY
1178 fs_fd = -2;
1179#endif
1180
1181 /* pid check not overridable via env */
1182#ifndef _WIN32
1183 if (flags & EVFLAG_FORKCHECK)
1184 curpid = getpid ();
1185#endif
1186
1187 if (!(flags & EVFLAG_NOENV)
1188 && !enable_secure ()
1189 && getenv ("LIBEV_FLAGS"))
1190 flags = atoi (getenv ("LIBEV_FLAGS"));
1191
1192 if (!(flags & 0x0000ffffU))
1193 flags |= ev_recommended_backends ();
1194
1195#if EV_USE_PORT
1196 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1197#endif
1198#if EV_USE_KQUEUE
1199 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1200#endif
1201#if EV_USE_EPOLL
1202 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1203#endif
1204#if EV_USE_POLL
1205 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1206#endif
1207#if EV_USE_SELECT
1208 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1209#endif
1210
1211 ev_init (&pipeev, pipecb);
1212 ev_set_priority (&pipeev, EV_MAXPRI);
1213 }
1214}
1215
1216static void noinline
1217loop_destroy (EV_P)
1218{
1219 int i;
1220
1221 if (ev_is_active (&pipeev))
1222 {
1223 ev_ref (EV_A); /* signal watcher */
1224 ev_io_stop (EV_A_ &pipeev);
1225
1226#if EV_USE_EVENTFD
1227 if (evfd >= 0)
1228 close (evfd);
1229#endif
1230
1231 if (evpipe [0] >= 0)
1232 {
1233 close (evpipe [0]);
1234 close (evpipe [1]);
1235 }
1236 }
1237
1238#if EV_USE_INOTIFY
1239 if (fs_fd >= 0)
1240 close (fs_fd);
1241#endif
1242
1243 if (backend_fd >= 0)
1244 close (backend_fd);
1245
1246#if EV_USE_PORT
1247 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1248#endif
1249#if EV_USE_KQUEUE
1250 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1251#endif
1252#if EV_USE_EPOLL
1253 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1254#endif
1255#if EV_USE_POLL
1256 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1257#endif
1258#if EV_USE_SELECT
1259 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1260#endif
1261
1262 for (i = NUMPRI; i--; )
1263 {
1264 array_free (pending, [i]);
1265#if EV_IDLE_ENABLE
1266 array_free (idle, [i]);
1267#endif
1268 }
1269
1270 ev_free (anfds); anfdmax = 0;
1271
1272 /* have to use the microsoft-never-gets-it-right macro */
1273 array_free (fdchange, EMPTY);
1274 array_free (timer, EMPTY);
1275#if EV_PERIODIC_ENABLE
1276 array_free (periodic, EMPTY);
1277#endif
1278#if EV_FORK_ENABLE
1279 array_free (fork, EMPTY);
1280#endif
1281 array_free (prepare, EMPTY);
1282 array_free (check, EMPTY);
1283#if EV_ASYNC_ENABLE
1284 array_free (async, EMPTY);
1285#endif
1286
1287 backend = 0;
1288}
1289
1290#if EV_USE_INOTIFY
1291void inline_size infy_fork (EV_P);
1292#endif
1293
1294void inline_size
1295loop_fork (EV_P)
1296{
1297#if EV_USE_PORT
1298 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1299#endif
1300#if EV_USE_KQUEUE
1301 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1302#endif
1303#if EV_USE_EPOLL
1304 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1305#endif
1306#if EV_USE_INOTIFY
1307 infy_fork (EV_A);
1308#endif
1309
1310 if (ev_is_active (&pipeev))
1311 {
1312 /* this "locks" the handlers against writing to the pipe */
1313 /* while we modify the fd vars */
286 gotsig = 1; 1314 gotsig = 1;
287 write (sigpipe [1], &gotsig, 1); 1315#if EV_ASYNC_ENABLE
1316 gotasync = 1;
1317#endif
1318
1319 ev_ref (EV_A);
1320 ev_io_stop (EV_A_ &pipeev);
1321
1322#if EV_USE_EVENTFD
1323 if (evfd >= 0)
1324 close (evfd);
1325#endif
1326
1327 if (evpipe [0] >= 0)
1328 {
1329 close (evpipe [0]);
1330 close (evpipe [1]);
1331 }
1332
1333 evpipe_init (EV_A);
1334 /* now iterate over everything, in case we missed something */
1335 pipecb (EV_A_ &pipeev, EV_READ);
1336 }
1337
1338 postfork = 0;
1339}
1340
1341#if EV_MULTIPLICITY
1342struct ev_loop *
1343ev_loop_new (unsigned int flags)
1344{
1345 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1346
1347 memset (loop, 0, sizeof (struct ev_loop));
1348
1349 loop_init (EV_A_ flags);
1350
1351 if (ev_backend (EV_A))
1352 return loop;
1353
1354 return 0;
1355}
1356
1357void
1358ev_loop_destroy (EV_P)
1359{
1360 loop_destroy (EV_A);
1361 ev_free (loop);
1362}
1363
1364void
1365ev_loop_fork (EV_P)
1366{
1367 postfork = 1; /* must be in line with ev_default_fork */
1368}
1369
1370#endif
1371
1372#if EV_MULTIPLICITY
1373struct ev_loop *
1374ev_default_loop_init (unsigned int flags)
1375#else
1376int
1377ev_default_loop (unsigned int flags)
1378#endif
1379{
1380 if (!ev_default_loop_ptr)
288 } 1381 {
289} 1382#if EV_MULTIPLICITY
1383 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1384#else
1385 ev_default_loop_ptr = 1;
1386#endif
290 1387
291static void 1388 loop_init (EV_A_ flags);
292sigcb (struct ev_io *iow, int revents) 1389
1390 if (ev_backend (EV_A))
1391 {
1392#ifndef _WIN32
1393 ev_signal_init (&childev, childcb, SIGCHLD);
1394 ev_set_priority (&childev, EV_MAXPRI);
1395 ev_signal_start (EV_A_ &childev);
1396 ev_unref (EV_A); /* child watcher should not keep loop alive */
1397#endif
1398 }
1399 else
1400 ev_default_loop_ptr = 0;
1401 }
1402
1403 return ev_default_loop_ptr;
1404}
1405
1406void
1407ev_default_destroy (void)
293{ 1408{
294 struct ev_signal *w; 1409#if EV_MULTIPLICITY
1410 struct ev_loop *loop = ev_default_loop_ptr;
1411#endif
1412
1413#ifndef _WIN32
1414 ev_ref (EV_A); /* child watcher */
1415 ev_signal_stop (EV_A_ &childev);
1416#endif
1417
1418 loop_destroy (EV_A);
1419}
1420
1421void
1422ev_default_fork (void)
1423{
1424#if EV_MULTIPLICITY
1425 struct ev_loop *loop = ev_default_loop_ptr;
1426#endif
1427
1428 if (backend)
1429 postfork = 1; /* must be in line with ev_loop_fork */
1430}
1431
1432/*****************************************************************************/
1433
1434void
1435ev_invoke (EV_P_ void *w, int revents)
1436{
1437 EV_CB_INVOKE ((W)w, revents);
1438}
1439
1440void inline_speed
1441call_pending (EV_P)
1442{
295 int sig; 1443 int pri;
296 1444
297 gotsig = 0; 1445 for (pri = NUMPRI; pri--; )
298 read (sigpipe [0], &revents, 1); 1446 while (pendingcnt [pri])
299
300 for (sig = signalmax; sig--; )
301 if (signals [sig].gotsig)
302 { 1447 {
303 signals [sig].gotsig = 0; 1448 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
304 1449
305 for (w = signals [sig].head; w; w = w->next) 1450 if (expect_true (p->w))
306 event ((W)w, EV_SIGNAL); 1451 {
1452 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1453
1454 p->w->pending = 0;
1455 EV_CB_INVOKE (p->w, p->events);
1456 }
307 } 1457 }
308} 1458}
309 1459
310static void 1460void inline_size
311siginit (void)
312{
313 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315
316 /* rather than sort out wether we really need nb, set it */
317 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
319
320 evio_set (&sigev, sigpipe [0], EV_READ);
321 evio_start (&sigev);
322}
323
324/*****************************************************************************/
325
326static struct ev_idle **idles;
327static int idlemax, idlecnt;
328
329static struct ev_prepare **prepares;
330static int preparemax, preparecnt;
331
332static struct ev_check **checks;
333static int checkmax, checkcnt;
334
335/*****************************************************************************/
336
337#if HAVE_EPOLL
338# include "ev_epoll.c"
339#endif
340#if HAVE_SELECT
341# include "ev_select.c"
342#endif
343
344int ev_init (int flags)
345{
346#if HAVE_MONOTONIC
347 {
348 struct timespec ts;
349 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350 have_monotonic = 1;
351 }
352#endif
353
354 ev_now = ev_time ();
355 now = get_clock ();
356 diff = ev_now - now;
357
358 if (pipe (sigpipe))
359 return 0;
360
361 ev_method = EVMETHOD_NONE;
362#if HAVE_EPOLL
363 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364#endif
365#if HAVE_SELECT
366 if (ev_method == EVMETHOD_NONE) select_init (flags);
367#endif
368
369 if (ev_method)
370 {
371 evw_init (&sigev, sigcb);
372 siginit ();
373 }
374
375 return ev_method;
376}
377
378/*****************************************************************************/
379
380void ev_prefork (void)
381{
382 /* nop */
383}
384
385void ev_postfork_parent (void)
386{
387 /* nop */
388}
389
390void ev_postfork_child (void)
391{
392#if HAVE_EPOLL
393 if (ev_method == EVMETHOD_EPOLL)
394 epoll_postfork_child ();
395#endif
396
397 evio_stop (&sigev);
398 close (sigpipe [0]);
399 close (sigpipe [1]);
400 pipe (sigpipe);
401 siginit ();
402}
403
404/*****************************************************************************/
405
406static void
407fd_reify (void)
408{
409 int i;
410
411 for (i = 0; i < fdchangecnt; ++i)
412 {
413 int fd = fdchanges [i];
414 ANFD *anfd = anfds + fd;
415 struct ev_io *w;
416
417 int wev = 0;
418
419 for (w = anfd->head; w; w = w->next)
420 wev |= w->events;
421
422 if (anfd->wev != wev)
423 {
424 method_modify (fd, anfd->wev, wev);
425 anfd->wev = wev;
426 }
427 }
428
429 fdchangecnt = 0;
430}
431
432static void
433call_pending ()
434{
435 while (pendingcnt)
436 {
437 ANPENDING *p = pendings + --pendingcnt;
438
439 if (p->w)
440 {
441 p->w->pending = 0;
442 p->w->cb (p->w, p->events);
443 }
444 }
445}
446
447static void
448timers_reify () 1461timers_reify (EV_P)
449{ 1462{
450 while (timercnt && timers [0]->at <= now) 1463 while (timercnt && ((WT)timers [0])->at <= mn_now)
451 { 1464 {
452 struct ev_timer *w = timers [0]; 1465 ev_timer *w = (ev_timer *)timers [0];
453 1466
454 event ((W)w, EV_TIMEOUT); 1467 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
455 1468
456 /* first reschedule or stop timer */ 1469 /* first reschedule or stop timer */
457 if (w->repeat) 1470 if (w->repeat)
458 { 1471 {
1472 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1473
459 w->at = now + w->repeat; 1474 ((WT)w)->at += w->repeat;
460 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1475 if (((WT)w)->at < mn_now)
1476 ((WT)w)->at = mn_now;
1477
461 downheap ((WT *)timers, timercnt, 0); 1478 downheap (timers, timercnt, 0);
462 } 1479 }
463 else 1480 else
464 evtimer_stop (w); /* nonrepeating: stop timer */ 1481 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465 }
466}
467 1482
468static void 1483 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1484 }
1485}
1486
1487#if EV_PERIODIC_ENABLE
1488void inline_size
469periodics_reify () 1489periodics_reify (EV_P)
470{ 1490{
471 while (periodiccnt && periodics [0]->at <= ev_now) 1491 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472 { 1492 {
473 struct ev_periodic *w = periodics [0]; 1493 ev_periodic *w = (ev_periodic *)periodics [0];
1494
1495 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
474 1496
475 /* first reschedule or stop timer */ 1497 /* first reschedule or stop timer */
476 if (w->interval) 1498 if (w->reschedule_cb)
477 { 1499 {
478 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1500 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
479 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1501 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
480 downheap ((WT *)periodics, periodiccnt, 0); 1502 downheap (periodics, periodiccnt, 0);
1503 }
1504 else if (w->interval)
1505 {
1506 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1507 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1508 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1509 downheap (periodics, periodiccnt, 0);
481 } 1510 }
482 else 1511 else
483 evperiodic_stop (w); /* nonrepeating: stop timer */ 1512 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484 1513
485 event ((W)w, EV_TIMEOUT); 1514 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486 } 1515 }
487} 1516}
488 1517
489static void 1518static void noinline
490periodics_reschedule (ev_tstamp diff) 1519periodics_reschedule (EV_P)
491{ 1520{
492 int i; 1521 int i;
493 1522
494 /* adjust periodics after time jump */ 1523 /* adjust periodics after time jump */
495 for (i = 0; i < periodiccnt; ++i) 1524 for (i = 0; i < periodiccnt; ++i)
496 { 1525 {
497 struct ev_periodic *w = periodics [i]; 1526 ev_periodic *w = (ev_periodic *)periodics [i];
498 1527
1528 if (w->reschedule_cb)
1529 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499 if (w->interval) 1530 else if (w->interval)
1531 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1532 }
1533
1534 /* now rebuild the heap */
1535 for (i = periodiccnt >> 1; i--; )
1536 downheap (periodics, periodiccnt, i);
1537}
1538#endif
1539
1540#if EV_IDLE_ENABLE
1541void inline_size
1542idle_reify (EV_P)
1543{
1544 if (expect_false (idleall))
1545 {
1546 int pri;
1547
1548 for (pri = NUMPRI; pri--; )
500 { 1549 {
501 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1550 if (pendingcnt [pri])
1551 break;
502 1552
503 if (fabs (diff) >= 1e-4) 1553 if (idlecnt [pri])
504 { 1554 {
505 evperiodic_stop (w); 1555 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
506 evperiodic_start (w); 1556 break;
507
508 i = 0; /* restart loop, inefficient, but time jumps should be rare */
509 } 1557 }
510 } 1558 }
511 } 1559 }
512} 1560}
1561#endif
513 1562
514static void 1563void inline_speed
515time_update () 1564time_update (EV_P_ ev_tstamp max_block)
516{ 1565{
517 int i; 1566 int i;
518 1567
519 ev_now = ev_time (); 1568#if EV_USE_MONOTONIC
520
521 if (have_monotonic) 1569 if (expect_true (have_monotonic))
522 { 1570 {
523 ev_tstamp odiff = diff; 1571 ev_tstamp odiff = rtmn_diff;
524 1572
525 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1573 mn_now = get_clock ();
1574
1575 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1576 /* interpolate in the meantime */
1577 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
526 { 1578 {
527 now = get_clock (); 1579 ev_rt_now = rtmn_diff + mn_now;
1580 return;
1581 }
1582
1583 now_floor = mn_now;
1584 ev_rt_now = ev_time ();
1585
1586 /* loop a few times, before making important decisions.
1587 * on the choice of "4": one iteration isn't enough,
1588 * in case we get preempted during the calls to
1589 * ev_time and get_clock. a second call is almost guaranteed
1590 * to succeed in that case, though. and looping a few more times
1591 * doesn't hurt either as we only do this on time-jumps or
1592 * in the unlikely event of having been preempted here.
1593 */
1594 for (i = 4; --i; )
1595 {
528 diff = ev_now - now; 1596 rtmn_diff = ev_rt_now - mn_now;
529 1597
530 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1598 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531 return; /* all is well */ 1599 return; /* all is well */
532 1600
533 ev_now = ev_time (); 1601 ev_rt_now = ev_time ();
1602 mn_now = get_clock ();
1603 now_floor = mn_now;
534 } 1604 }
535 1605
1606# if EV_PERIODIC_ENABLE
536 periodics_reschedule (diff - odiff); 1607 periodics_reschedule (EV_A);
1608# endif
537 /* no timer adjustment, as the monotonic clock doesn't jump */ 1609 /* no timer adjustment, as the monotonic clock doesn't jump */
1610 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
538 } 1611 }
539 else 1612 else
1613#endif
540 { 1614 {
541 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1615 ev_rt_now = ev_time ();
1616
1617 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
542 { 1618 {
1619#if EV_PERIODIC_ENABLE
543 periodics_reschedule (ev_now - now); 1620 periodics_reschedule (EV_A);
544 1621#endif
545 /* adjust timers. this is easy, as the offset is the same for all */ 1622 /* adjust timers. this is easy, as the offset is the same for all of them */
546 for (i = 0; i < timercnt; ++i) 1623 for (i = 0; i < timercnt; ++i)
547 timers [i]->at += diff; 1624 ((WT)timers [i])->at += ev_rt_now - mn_now;
548 } 1625 }
549 1626
550 now = ev_now; 1627 mn_now = ev_rt_now;
551 } 1628 }
552} 1629}
553 1630
554int ev_loop_done; 1631void
1632ev_ref (EV_P)
1633{
1634 ++activecnt;
1635}
555 1636
1637void
1638ev_unref (EV_P)
1639{
1640 --activecnt;
1641}
1642
1643static int loop_done;
1644
1645void
556void ev_loop (int flags) 1646ev_loop (EV_P_ int flags)
557{ 1647{
558 double block; 1648 loop_done = EVUNLOOP_CANCEL;
559 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; 1649
1650 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
560 1651
561 do 1652 do
562 { 1653 {
1654#ifndef _WIN32
1655 if (expect_false (curpid)) /* penalise the forking check even more */
1656 if (expect_false (getpid () != curpid))
1657 {
1658 curpid = getpid ();
1659 postfork = 1;
1660 }
1661#endif
1662
1663#if EV_FORK_ENABLE
1664 /* we might have forked, so queue fork handlers */
1665 if (expect_false (postfork))
1666 if (forkcnt)
1667 {
1668 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1669 call_pending (EV_A);
1670 }
1671#endif
1672
563 /* queue check watchers (and execute them) */ 1673 /* queue prepare watchers (and execute them) */
564 if (preparecnt) 1674 if (expect_false (preparecnt))
565 { 1675 {
566 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1676 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567 call_pending (); 1677 call_pending (EV_A);
568 } 1678 }
569 1679
1680 if (expect_false (!activecnt))
1681 break;
1682
1683 /* we might have forked, so reify kernel state if necessary */
1684 if (expect_false (postfork))
1685 loop_fork (EV_A);
1686
570 /* update fd-related kernel structures */ 1687 /* update fd-related kernel structures */
571 fd_reify (); 1688 fd_reify (EV_A);
572 1689
573 /* calculate blocking time */ 1690 /* calculate blocking time */
1691 {
1692 ev_tstamp waittime = 0.;
1693 ev_tstamp sleeptime = 0.;
574 1694
575 /* we only need this for !monotonic clockor timers, but as we basically 1695 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
576 always have timers, we just calculate it always */
577 ev_now = ev_time ();
578
579 if (flags & EVLOOP_NONBLOCK || idlecnt)
580 block = 0.;
581 else
582 { 1696 {
1697 /* update time to cancel out callback processing overhead */
1698 time_update (EV_A_ 1e100);
1699
583 block = MAX_BLOCKTIME; 1700 waittime = MAX_BLOCKTIME;
584 1701
585 if (timercnt) 1702 if (timercnt)
586 { 1703 {
587 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1704 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
588 if (block > to) block = to; 1705 if (waittime > to) waittime = to;
589 } 1706 }
590 1707
1708#if EV_PERIODIC_ENABLE
591 if (periodiccnt) 1709 if (periodiccnt)
592 { 1710 {
593 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1711 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
594 if (block > to) block = to; 1712 if (waittime > to) waittime = to;
595 } 1713 }
1714#endif
596 1715
597 if (block < 0.) block = 0.; 1716 if (expect_false (waittime < timeout_blocktime))
1717 waittime = timeout_blocktime;
1718
1719 sleeptime = waittime - backend_fudge;
1720
1721 if (expect_true (sleeptime > io_blocktime))
1722 sleeptime = io_blocktime;
1723
1724 if (sleeptime)
1725 {
1726 ev_sleep (sleeptime);
1727 waittime -= sleeptime;
1728 }
598 } 1729 }
599 1730
600 method_poll (block); 1731 ++loop_count;
1732 backend_poll (EV_A_ waittime);
601 1733
602 /* update ev_now, do magic */ 1734 /* update ev_rt_now, do magic */
603 time_update (); 1735 time_update (EV_A_ waittime + sleeptime);
1736 }
604 1737
605 /* queue pending timers and reschedule them */ 1738 /* queue pending timers and reschedule them */
606 timers_reify (); /* relative timers called last */ 1739 timers_reify (EV_A); /* relative timers called last */
1740#if EV_PERIODIC_ENABLE
607 periodics_reify (); /* absolute timers called first */ 1741 periodics_reify (EV_A); /* absolute timers called first */
1742#endif
608 1743
1744#if EV_IDLE_ENABLE
609 /* queue idle watchers unless io or timers are pending */ 1745 /* queue idle watchers unless other events are pending */
610 if (!pendingcnt) 1746 idle_reify (EV_A);
611 queue_events ((W *)idles, idlecnt, EV_IDLE); 1747#endif
612 1748
613 /* queue check watchers, to be executed first */ 1749 /* queue check watchers, to be executed first */
614 if (checkcnt) 1750 if (expect_false (checkcnt))
615 queue_events ((W *)checks, checkcnt, EV_CHECK); 1751 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616 1752
617 call_pending (); 1753 call_pending (EV_A);
618 } 1754 }
619 while (!ev_loop_done); 1755 while (expect_true (
1756 activecnt
1757 && !loop_done
1758 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1759 ));
620 1760
621 if (ev_loop_done != 2) 1761 if (loop_done == EVUNLOOP_ONE)
1762 loop_done = EVUNLOOP_CANCEL;
1763}
1764
1765void
1766ev_unloop (EV_P_ int how)
1767{
622 ev_loop_done = 0; 1768 loop_done = how;
623} 1769}
624 1770
625/*****************************************************************************/ 1771/*****************************************************************************/
626 1772
627static void 1773void inline_size
628wlist_add (WL *head, WL elem) 1774wlist_add (WL *head, WL elem)
629{ 1775{
630 elem->next = *head; 1776 elem->next = *head;
631 *head = elem; 1777 *head = elem;
632} 1778}
633 1779
634static void 1780void inline_size
635wlist_del (WL *head, WL elem) 1781wlist_del (WL *head, WL elem)
636{ 1782{
637 while (*head) 1783 while (*head)
638 { 1784 {
639 if (*head == elem) 1785 if (*head == elem)
… …
644 1790
645 head = &(*head)->next; 1791 head = &(*head)->next;
646 } 1792 }
647} 1793}
648 1794
649static void 1795void inline_speed
650ev_clear (W w) 1796clear_pending (EV_P_ W w)
651{ 1797{
652 if (w->pending) 1798 if (w->pending)
653 { 1799 {
654 pendings [w->pending - 1].w = 0; 1800 pendings [ABSPRI (w)][w->pending - 1].w = 0;
655 w->pending = 0; 1801 w->pending = 0;
656 } 1802 }
657} 1803}
658 1804
659static void 1805int
1806ev_clear_pending (EV_P_ void *w)
1807{
1808 W w_ = (W)w;
1809 int pending = w_->pending;
1810
1811 if (expect_true (pending))
1812 {
1813 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1814 w_->pending = 0;
1815 p->w = 0;
1816 return p->events;
1817 }
1818 else
1819 return 0;
1820}
1821
1822void inline_size
1823pri_adjust (EV_P_ W w)
1824{
1825 int pri = w->priority;
1826 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1827 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1828 w->priority = pri;
1829}
1830
1831void inline_speed
660ev_start (W w, int active) 1832ev_start (EV_P_ W w, int active)
661{ 1833{
1834 pri_adjust (EV_A_ w);
662 w->active = active; 1835 w->active = active;
1836 ev_ref (EV_A);
663} 1837}
664 1838
665static void 1839void inline_size
666ev_stop (W w) 1840ev_stop (EV_P_ W w)
667{ 1841{
1842 ev_unref (EV_A);
668 w->active = 0; 1843 w->active = 0;
669} 1844}
670 1845
671/*****************************************************************************/ 1846/*****************************************************************************/
672 1847
673void 1848void noinline
674evio_start (struct ev_io *w) 1849ev_io_start (EV_P_ ev_io *w)
675{ 1850{
676 if (ev_is_active (w))
677 return;
678
679 int fd = w->fd; 1851 int fd = w->fd;
680 1852
1853 if (expect_false (ev_is_active (w)))
1854 return;
1855
1856 assert (("ev_io_start called with negative fd", fd >= 0));
1857
681 ev_start ((W)w, 1); 1858 ev_start (EV_A_ (W)w, 1);
682 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1859 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
683 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1860 wlist_add (&anfds[fd].head, (WL)w);
684 1861
685 ++fdchangecnt; 1862 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
686 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1863 w->events &= ~EV_IOFDSET;
687 fdchanges [fdchangecnt - 1] = fd;
688} 1864}
689 1865
690void 1866void noinline
691evio_stop (struct ev_io *w) 1867ev_io_stop (EV_P_ ev_io *w)
692{ 1868{
693 ev_clear ((W)w); 1869 clear_pending (EV_A_ (W)w);
694 if (!ev_is_active (w)) 1870 if (expect_false (!ev_is_active (w)))
695 return; 1871 return;
696 1872
1873 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1874
697 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1875 wlist_del (&anfds[w->fd].head, (WL)w);
698 ev_stop ((W)w); 1876 ev_stop (EV_A_ (W)w);
699 1877
700 ++fdchangecnt; 1878 fd_change (EV_A_ w->fd, 1);
701 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702 fdchanges [fdchangecnt - 1] = w->fd;
703} 1879}
704 1880
705void 1881void noinline
706evtimer_start (struct ev_timer *w) 1882ev_timer_start (EV_P_ ev_timer *w)
707{ 1883{
708 if (ev_is_active (w)) 1884 if (expect_false (ev_is_active (w)))
709 return; 1885 return;
710 1886
711 w->at += now; 1887 ((WT)w)->at += mn_now;
712 1888
713 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1889 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714 1890
715 ev_start ((W)w, ++timercnt); 1891 ev_start (EV_A_ (W)w, ++timercnt);
716 array_needsize (timers, timermax, timercnt, ); 1892 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
717 timers [timercnt - 1] = w; 1893 timers [timercnt - 1] = (WT)w;
718 upheap ((WT *)timers, timercnt - 1); 1894 upheap (timers, timercnt - 1);
719}
720 1895
721void 1896 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1897}
1898
1899void noinline
722evtimer_stop (struct ev_timer *w) 1900ev_timer_stop (EV_P_ ev_timer *w)
723{ 1901{
724 ev_clear ((W)w); 1902 clear_pending (EV_A_ (W)w);
725 if (!ev_is_active (w)) 1903 if (expect_false (!ev_is_active (w)))
726 return; 1904 return;
727 1905
728 if (w->active < timercnt--) 1906 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1907
1908 {
1909 int active = ((W)w)->active;
1910
1911 if (expect_true (--active < --timercnt))
729 { 1912 {
730 timers [w->active - 1] = timers [timercnt]; 1913 timers [active] = timers [timercnt];
731 downheap ((WT *)timers, timercnt, w->active - 1); 1914 adjustheap (timers, timercnt, active);
732 } 1915 }
1916 }
733 1917
734 w->at = w->repeat; 1918 ((WT)w)->at -= mn_now;
735 1919
736 ev_stop ((W)w); 1920 ev_stop (EV_A_ (W)w);
737} 1921}
738 1922
739void 1923void noinline
740evtimer_again (struct ev_timer *w) 1924ev_timer_again (EV_P_ ev_timer *w)
741{ 1925{
742 if (ev_is_active (w)) 1926 if (ev_is_active (w))
743 { 1927 {
744 if (w->repeat) 1928 if (w->repeat)
745 { 1929 {
746 w->at = now + w->repeat; 1930 ((WT)w)->at = mn_now + w->repeat;
747 downheap ((WT *)timers, timercnt, w->active - 1); 1931 adjustheap (timers, timercnt, ((W)w)->active - 1);
748 } 1932 }
749 else 1933 else
750 evtimer_stop (w); 1934 ev_timer_stop (EV_A_ w);
751 } 1935 }
752 else if (w->repeat) 1936 else if (w->repeat)
1937 {
1938 w->at = w->repeat;
753 evtimer_start (w); 1939 ev_timer_start (EV_A_ w);
1940 }
754} 1941}
755 1942
756void 1943#if EV_PERIODIC_ENABLE
1944void noinline
757evperiodic_start (struct ev_periodic *w) 1945ev_periodic_start (EV_P_ ev_periodic *w)
758{ 1946{
759 if (ev_is_active (w)) 1947 if (expect_false (ev_is_active (w)))
760 return; 1948 return;
761 1949
762 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1950 if (w->reschedule_cb)
763 1951 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1952 else if (w->interval)
1953 {
1954 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
764 /* this formula differs from the one in periodic_reify because we do not always round up */ 1955 /* this formula differs from the one in periodic_reify because we do not always round up */
765 if (w->interval)
766 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1956 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1957 }
1958 else
1959 ((WT)w)->at = w->offset;
767 1960
768 ev_start ((W)w, ++periodiccnt); 1961 ev_start (EV_A_ (W)w, ++periodiccnt);
769 array_needsize (periodics, periodicmax, periodiccnt, ); 1962 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
770 periodics [periodiccnt - 1] = w; 1963 periodics [periodiccnt - 1] = (WT)w;
771 upheap ((WT *)periodics, periodiccnt - 1); 1964 upheap (periodics, periodiccnt - 1);
772}
773 1965
774void 1966 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1967}
1968
1969void noinline
775evperiodic_stop (struct ev_periodic *w) 1970ev_periodic_stop (EV_P_ ev_periodic *w)
776{ 1971{
777 ev_clear ((W)w); 1972 clear_pending (EV_A_ (W)w);
778 if (!ev_is_active (w)) 1973 if (expect_false (!ev_is_active (w)))
779 return; 1974 return;
780 1975
781 if (w->active < periodiccnt--) 1976 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1977
1978 {
1979 int active = ((W)w)->active;
1980
1981 if (expect_true (--active < --periodiccnt))
782 { 1982 {
783 periodics [w->active - 1] = periodics [periodiccnt]; 1983 periodics [active] = periodics [periodiccnt];
784 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1984 adjustheap (periodics, periodiccnt, active);
785 } 1985 }
1986 }
786 1987
787 ev_stop ((W)w); 1988 ev_stop (EV_A_ (W)w);
788} 1989}
789 1990
790void 1991void noinline
1992ev_periodic_again (EV_P_ ev_periodic *w)
1993{
1994 /* TODO: use adjustheap and recalculation */
1995 ev_periodic_stop (EV_A_ w);
1996 ev_periodic_start (EV_A_ w);
1997}
1998#endif
1999
2000#ifndef SA_RESTART
2001# define SA_RESTART 0
2002#endif
2003
2004void noinline
791evsignal_start (struct ev_signal *w) 2005ev_signal_start (EV_P_ ev_signal *w)
792{ 2006{
2007#if EV_MULTIPLICITY
2008 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2009#endif
793 if (ev_is_active (w)) 2010 if (expect_false (ev_is_active (w)))
794 return; 2011 return;
795 2012
796 ev_start ((W)w, 1); 2013 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2014
2015 evpipe_init (EV_A);
2016
2017 {
2018#ifndef _WIN32
2019 sigset_t full, prev;
2020 sigfillset (&full);
2021 sigprocmask (SIG_SETMASK, &full, &prev);
2022#endif
2023
797 array_needsize (signals, signalmax, w->signum, signals_init); 2024 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2025
2026#ifndef _WIN32
2027 sigprocmask (SIG_SETMASK, &prev, 0);
2028#endif
2029 }
2030
2031 ev_start (EV_A_ (W)w, 1);
798 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2032 wlist_add (&signals [w->signum - 1].head, (WL)w);
799 2033
800 if (!w->next) 2034 if (!((WL)w)->next)
801 { 2035 {
2036#if _WIN32
2037 signal (w->signum, ev_sighandler);
2038#else
802 struct sigaction sa; 2039 struct sigaction sa;
803 sa.sa_handler = sighandler; 2040 sa.sa_handler = ev_sighandler;
804 sigfillset (&sa.sa_mask); 2041 sigfillset (&sa.sa_mask);
805 sa.sa_flags = 0; 2042 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806 sigaction (w->signum, &sa, 0); 2043 sigaction (w->signum, &sa, 0);
2044#endif
807 } 2045 }
808} 2046}
809 2047
810void 2048void noinline
811evsignal_stop (struct ev_signal *w) 2049ev_signal_stop (EV_P_ ev_signal *w)
812{ 2050{
813 ev_clear ((W)w); 2051 clear_pending (EV_A_ (W)w);
814 if (!ev_is_active (w)) 2052 if (expect_false (!ev_is_active (w)))
815 return; 2053 return;
816 2054
817 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2055 wlist_del (&signals [w->signum - 1].head, (WL)w);
818 ev_stop ((W)w); 2056 ev_stop (EV_A_ (W)w);
819 2057
820 if (!signals [w->signum - 1].head) 2058 if (!signals [w->signum - 1].head)
821 signal (w->signum, SIG_DFL); 2059 signal (w->signum, SIG_DFL);
822} 2060}
823 2061
824void evidle_start (struct ev_idle *w) 2062void
2063ev_child_start (EV_P_ ev_child *w)
825{ 2064{
2065#if EV_MULTIPLICITY
2066 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2067#endif
826 if (ev_is_active (w)) 2068 if (expect_false (ev_is_active (w)))
827 return; 2069 return;
828 2070
829 ev_start ((W)w, ++idlecnt); 2071 ev_start (EV_A_ (W)w, 1);
830 array_needsize (idles, idlemax, idlecnt, ); 2072 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
831 idles [idlecnt - 1] = w;
832} 2073}
833 2074
834void evidle_stop (struct ev_idle *w) 2075void
2076ev_child_stop (EV_P_ ev_child *w)
835{ 2077{
836 ev_clear ((W)w); 2078 clear_pending (EV_A_ (W)w);
837 if (ev_is_active (w)) 2079 if (expect_false (!ev_is_active (w)))
838 return; 2080 return;
839 2081
840 idles [w->active - 1] = idles [--idlecnt]; 2082 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
841 ev_stop ((W)w); 2083 ev_stop (EV_A_ (W)w);
842} 2084}
843 2085
2086#if EV_STAT_ENABLE
2087
2088# ifdef _WIN32
2089# undef lstat
2090# define lstat(a,b) _stati64 (a,b)
2091# endif
2092
2093#define DEF_STAT_INTERVAL 5.0074891
2094#define MIN_STAT_INTERVAL 0.1074891
2095
2096static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2097
2098#if EV_USE_INOTIFY
2099# define EV_INOTIFY_BUFSIZE 8192
2100
2101static void noinline
2102infy_add (EV_P_ ev_stat *w)
2103{
2104 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);
2105
2106 if (w->wd < 0)
2107 {
2108 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2109
2110 /* monitor some parent directory for speedup hints */
2111 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2112 {
2113 char path [4096];
2114 strcpy (path, w->path);
2115
2116 do
2117 {
2118 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2119 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2120
2121 char *pend = strrchr (path, '/');
2122
2123 if (!pend)
2124 break; /* whoops, no '/', complain to your admin */
2125
2126 *pend = 0;
2127 w->wd = inotify_add_watch (fs_fd, path, mask);
2128 }
2129 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2130 }
2131 }
2132 else
2133 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2134
2135 if (w->wd >= 0)
2136 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2137}
2138
2139static void noinline
2140infy_del (EV_P_ ev_stat *w)
2141{
2142 int slot;
2143 int wd = w->wd;
2144
2145 if (wd < 0)
2146 return;
2147
2148 w->wd = -2;
2149 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2150 wlist_del (&fs_hash [slot].head, (WL)w);
2151
2152 /* remove this watcher, if others are watching it, they will rearm */
2153 inotify_rm_watch (fs_fd, wd);
2154}
2155
2156static void noinline
2157infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2158{
2159 if (slot < 0)
2160 /* overflow, need to check for all hahs slots */
2161 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2162 infy_wd (EV_A_ slot, wd, ev);
2163 else
2164 {
2165 WL w_;
2166
2167 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2168 {
2169 ev_stat *w = (ev_stat *)w_;
2170 w_ = w_->next; /* lets us remove this watcher and all before it */
2171
2172 if (w->wd == wd || wd == -1)
2173 {
2174 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2175 {
2176 w->wd = -1;
2177 infy_add (EV_A_ w); /* re-add, no matter what */
2178 }
2179
2180 stat_timer_cb (EV_A_ &w->timer, 0);
2181 }
2182 }
2183 }
2184}
2185
2186static void
2187infy_cb (EV_P_ ev_io *w, int revents)
2188{
2189 char buf [EV_INOTIFY_BUFSIZE];
2190 struct inotify_event *ev = (struct inotify_event *)buf;
2191 int ofs;
2192 int len = read (fs_fd, buf, sizeof (buf));
2193
2194 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2195 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2196}
2197
2198void inline_size
2199infy_init (EV_P)
2200{
2201 if (fs_fd != -2)
2202 return;
2203
2204 fs_fd = inotify_init ();
2205
2206 if (fs_fd >= 0)
2207 {
2208 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2209 ev_set_priority (&fs_w, EV_MAXPRI);
2210 ev_io_start (EV_A_ &fs_w);
2211 }
2212}
2213
2214void inline_size
2215infy_fork (EV_P)
2216{
2217 int slot;
2218
2219 if (fs_fd < 0)
2220 return;
2221
2222 close (fs_fd);
2223 fs_fd = inotify_init ();
2224
2225 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2226 {
2227 WL w_ = fs_hash [slot].head;
2228 fs_hash [slot].head = 0;
2229
2230 while (w_)
2231 {
2232 ev_stat *w = (ev_stat *)w_;
2233 w_ = w_->next; /* lets us add this watcher */
2234
2235 w->wd = -1;
2236
2237 if (fs_fd >= 0)
2238 infy_add (EV_A_ w); /* re-add, no matter what */
2239 else
2240 ev_timer_start (EV_A_ &w->timer);
2241 }
2242
2243 }
2244}
2245
2246#endif
2247
2248void
2249ev_stat_stat (EV_P_ ev_stat *w)
2250{
2251 if (lstat (w->path, &w->attr) < 0)
2252 w->attr.st_nlink = 0;
2253 else if (!w->attr.st_nlink)
2254 w->attr.st_nlink = 1;
2255}
2256
2257static void noinline
2258stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2259{
2260 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2261
2262 /* we copy this here each the time so that */
2263 /* prev has the old value when the callback gets invoked */
2264 w->prev = w->attr;
2265 ev_stat_stat (EV_A_ w);
2266
2267 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2268 if (
2269 w->prev.st_dev != w->attr.st_dev
2270 || w->prev.st_ino != w->attr.st_ino
2271 || w->prev.st_mode != w->attr.st_mode
2272 || w->prev.st_nlink != w->attr.st_nlink
2273 || w->prev.st_uid != w->attr.st_uid
2274 || w->prev.st_gid != w->attr.st_gid
2275 || w->prev.st_rdev != w->attr.st_rdev
2276 || w->prev.st_size != w->attr.st_size
2277 || w->prev.st_atime != w->attr.st_atime
2278 || w->prev.st_mtime != w->attr.st_mtime
2279 || w->prev.st_ctime != w->attr.st_ctime
2280 ) {
2281 #if EV_USE_INOTIFY
2282 infy_del (EV_A_ w);
2283 infy_add (EV_A_ w);
2284 ev_stat_stat (EV_A_ w); /* avoid race... */
2285 #endif
2286
2287 ev_feed_event (EV_A_ w, EV_STAT);
2288 }
2289}
2290
2291void
2292ev_stat_start (EV_P_ ev_stat *w)
2293{
2294 if (expect_false (ev_is_active (w)))
2295 return;
2296
2297 /* since we use memcmp, we need to clear any padding data etc. */
2298 memset (&w->prev, 0, sizeof (ev_statdata));
2299 memset (&w->attr, 0, sizeof (ev_statdata));
2300
2301 ev_stat_stat (EV_A_ w);
2302
2303 if (w->interval < MIN_STAT_INTERVAL)
2304 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2305
2306 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2307 ev_set_priority (&w->timer, ev_priority (w));
2308
2309#if EV_USE_INOTIFY
2310 infy_init (EV_A);
2311
2312 if (fs_fd >= 0)
2313 infy_add (EV_A_ w);
2314 else
2315#endif
2316 ev_timer_start (EV_A_ &w->timer);
2317
2318 ev_start (EV_A_ (W)w, 1);
2319}
2320
2321void
2322ev_stat_stop (EV_P_ ev_stat *w)
2323{
2324 clear_pending (EV_A_ (W)w);
2325 if (expect_false (!ev_is_active (w)))
2326 return;
2327
2328#if EV_USE_INOTIFY
2329 infy_del (EV_A_ w);
2330#endif
2331 ev_timer_stop (EV_A_ &w->timer);
2332
2333 ev_stop (EV_A_ (W)w);
2334}
2335#endif
2336
2337#if EV_IDLE_ENABLE
2338void
2339ev_idle_start (EV_P_ ev_idle *w)
2340{
2341 if (expect_false (ev_is_active (w)))
2342 return;
2343
2344 pri_adjust (EV_A_ (W)w);
2345
2346 {
2347 int active = ++idlecnt [ABSPRI (w)];
2348
2349 ++idleall;
2350 ev_start (EV_A_ (W)w, active);
2351
2352 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2353 idles [ABSPRI (w)][active - 1] = w;
2354 }
2355}
2356
2357void
2358ev_idle_stop (EV_P_ ev_idle *w)
2359{
2360 clear_pending (EV_A_ (W)w);
2361 if (expect_false (!ev_is_active (w)))
2362 return;
2363
2364 {
2365 int active = ((W)w)->active;
2366
2367 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2368 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2369
2370 ev_stop (EV_A_ (W)w);
2371 --idleall;
2372 }
2373}
2374#endif
2375
2376void
844void evprepare_start (struct ev_prepare *w) 2377ev_prepare_start (EV_P_ ev_prepare *w)
845{ 2378{
846 if (ev_is_active (w)) 2379 if (expect_false (ev_is_active (w)))
847 return; 2380 return;
848 2381
849 ev_start ((W)w, ++preparecnt); 2382 ev_start (EV_A_ (W)w, ++preparecnt);
850 array_needsize (prepares, preparemax, preparecnt, ); 2383 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
851 prepares [preparecnt - 1] = w; 2384 prepares [preparecnt - 1] = w;
852} 2385}
853 2386
2387void
854void evprepare_stop (struct ev_prepare *w) 2388ev_prepare_stop (EV_P_ ev_prepare *w)
855{ 2389{
856 ev_clear ((W)w); 2390 clear_pending (EV_A_ (W)w);
857 if (ev_is_active (w)) 2391 if (expect_false (!ev_is_active (w)))
858 return; 2392 return;
859 2393
2394 {
2395 int active = ((W)w)->active;
860 prepares [w->active - 1] = prepares [--preparecnt]; 2396 prepares [active - 1] = prepares [--preparecnt];
2397 ((W)prepares [active - 1])->active = active;
2398 }
2399
861 ev_stop ((W)w); 2400 ev_stop (EV_A_ (W)w);
862} 2401}
863 2402
2403void
864void evcheck_start (struct ev_check *w) 2404ev_check_start (EV_P_ ev_check *w)
865{ 2405{
866 if (ev_is_active (w)) 2406 if (expect_false (ev_is_active (w)))
867 return; 2407 return;
868 2408
869 ev_start ((W)w, ++checkcnt); 2409 ev_start (EV_A_ (W)w, ++checkcnt);
870 array_needsize (checks, checkmax, checkcnt, ); 2410 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
871 checks [checkcnt - 1] = w; 2411 checks [checkcnt - 1] = w;
872} 2412}
873 2413
2414void
874void evcheck_stop (struct ev_check *w) 2415ev_check_stop (EV_P_ ev_check *w)
875{ 2416{
876 ev_clear ((W)w); 2417 clear_pending (EV_A_ (W)w);
877 if (ev_is_active (w)) 2418 if (expect_false (!ev_is_active (w)))
878 return; 2419 return;
879 2420
2421 {
2422 int active = ((W)w)->active;
880 checks [w->active - 1] = checks [--checkcnt]; 2423 checks [active - 1] = checks [--checkcnt];
2424 ((W)checks [active - 1])->active = active;
2425 }
2426
881 ev_stop ((W)w); 2427 ev_stop (EV_A_ (W)w);
882} 2428}
2429
2430#if EV_EMBED_ENABLE
2431void noinline
2432ev_embed_sweep (EV_P_ ev_embed *w)
2433{
2434 ev_loop (w->other, EVLOOP_NONBLOCK);
2435}
2436
2437static void
2438embed_io_cb (EV_P_ ev_io *io, int revents)
2439{
2440 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2441
2442 if (ev_cb (w))
2443 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2444 else
2445 ev_loop (w->other, EVLOOP_NONBLOCK);
2446}
2447
2448static void
2449embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2450{
2451 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2452
2453 {
2454 struct ev_loop *loop = w->other;
2455
2456 while (fdchangecnt)
2457 {
2458 fd_reify (EV_A);
2459 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2460 }
2461 }
2462}
2463
2464#if 0
2465static void
2466embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2467{
2468 ev_idle_stop (EV_A_ idle);
2469}
2470#endif
2471
2472void
2473ev_embed_start (EV_P_ ev_embed *w)
2474{
2475 if (expect_false (ev_is_active (w)))
2476 return;
2477
2478 {
2479 struct ev_loop *loop = w->other;
2480 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2481 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2482 }
2483
2484 ev_set_priority (&w->io, ev_priority (w));
2485 ev_io_start (EV_A_ &w->io);
2486
2487 ev_prepare_init (&w->prepare, embed_prepare_cb);
2488 ev_set_priority (&w->prepare, EV_MINPRI);
2489 ev_prepare_start (EV_A_ &w->prepare);
2490
2491 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2492
2493 ev_start (EV_A_ (W)w, 1);
2494}
2495
2496void
2497ev_embed_stop (EV_P_ ev_embed *w)
2498{
2499 clear_pending (EV_A_ (W)w);
2500 if (expect_false (!ev_is_active (w)))
2501 return;
2502
2503 ev_io_stop (EV_A_ &w->io);
2504 ev_prepare_stop (EV_A_ &w->prepare);
2505
2506 ev_stop (EV_A_ (W)w);
2507}
2508#endif
2509
2510#if EV_FORK_ENABLE
2511void
2512ev_fork_start (EV_P_ ev_fork *w)
2513{
2514 if (expect_false (ev_is_active (w)))
2515 return;
2516
2517 ev_start (EV_A_ (W)w, ++forkcnt);
2518 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2519 forks [forkcnt - 1] = w;
2520}
2521
2522void
2523ev_fork_stop (EV_P_ ev_fork *w)
2524{
2525 clear_pending (EV_A_ (W)w);
2526 if (expect_false (!ev_is_active (w)))
2527 return;
2528
2529 {
2530 int active = ((W)w)->active;
2531 forks [active - 1] = forks [--forkcnt];
2532 ((W)forks [active - 1])->active = active;
2533 }
2534
2535 ev_stop (EV_A_ (W)w);
2536}
2537#endif
2538
2539#if EV_ASYNC_ENABLE
2540void
2541ev_async_start (EV_P_ ev_async *w)
2542{
2543 if (expect_false (ev_is_active (w)))
2544 return;
2545
2546 evpipe_init (EV_A);
2547
2548 ev_start (EV_A_ (W)w, ++asynccnt);
2549 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2550 asyncs [asynccnt - 1] = w;
2551}
2552
2553void
2554ev_async_stop (EV_P_ ev_async *w)
2555{
2556 clear_pending (EV_A_ (W)w);
2557 if (expect_false (!ev_is_active (w)))
2558 return;
2559
2560 {
2561 int active = ((W)w)->active;
2562 asyncs [active - 1] = asyncs [--asynccnt];
2563 ((W)asyncs [active - 1])->active = active;
2564 }
2565
2566 ev_stop (EV_A_ (W)w);
2567}
2568
2569void
2570ev_async_send (EV_P_ ev_async *w)
2571{
2572 w->sent = 1;
2573 evpipe_write (EV_A_ &gotasync);
2574}
2575#endif
883 2576
884/*****************************************************************************/ 2577/*****************************************************************************/
885 2578
886struct ev_once 2579struct ev_once
887{ 2580{
888 struct ev_io io; 2581 ev_io io;
889 struct ev_timer to; 2582 ev_timer to;
890 void (*cb)(int revents, void *arg); 2583 void (*cb)(int revents, void *arg);
891 void *arg; 2584 void *arg;
892}; 2585};
893 2586
894static void 2587static void
895once_cb (struct ev_once *once, int revents) 2588once_cb (EV_P_ struct ev_once *once, int revents)
896{ 2589{
897 void (*cb)(int revents, void *arg) = once->cb; 2590 void (*cb)(int revents, void *arg) = once->cb;
898 void *arg = once->arg; 2591 void *arg = once->arg;
899 2592
900 evio_stop (&once->io); 2593 ev_io_stop (EV_A_ &once->io);
901 evtimer_stop (&once->to); 2594 ev_timer_stop (EV_A_ &once->to);
902 free (once); 2595 ev_free (once);
903 2596
904 cb (revents, arg); 2597 cb (revents, arg);
905} 2598}
906 2599
907static void 2600static void
908once_cb_io (struct ev_io *w, int revents) 2601once_cb_io (EV_P_ ev_io *w, int revents)
909{ 2602{
910 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2603 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
911} 2604}
912 2605
913static void 2606static void
914once_cb_to (struct ev_timer *w, int revents) 2607once_cb_to (EV_P_ ev_timer *w, int revents)
915{ 2608{
916 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2609 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
917} 2610}
918 2611
919void 2612void
920ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2613ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
921{ 2614{
922 struct ev_once *once = malloc (sizeof (struct ev_once)); 2615 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
923 2616
924 if (!once) 2617 if (expect_false (!once))
925 cb (EV_ERROR, arg); 2618 {
926 else 2619 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2620 return;
927 { 2621 }
2622
928 once->cb = cb; 2623 once->cb = cb;
929 once->arg = arg; 2624 once->arg = arg;
930 2625
931 evw_init (&once->io, once_cb_io); 2626 ev_init (&once->io, once_cb_io);
932
933 if (fd >= 0) 2627 if (fd >= 0)
934 { 2628 {
935 evio_set (&once->io, fd, events); 2629 ev_io_set (&once->io, fd, events);
936 evio_start (&once->io); 2630 ev_io_start (EV_A_ &once->io);
937 } 2631 }
938 2632
939 evw_init (&once->to, once_cb_to); 2633 ev_init (&once->to, once_cb_to);
940
941 if (timeout >= 0.) 2634 if (timeout >= 0.)
942 { 2635 {
943 evtimer_set (&once->to, timeout, 0.); 2636 ev_timer_set (&once->to, timeout, 0.);
944 evtimer_start (&once->to); 2637 ev_timer_start (EV_A_ &once->to);
945 }
946 }
947}
948
949/*****************************************************************************/
950
951#if 0
952
953struct ev_io wio;
954
955static void
956sin_cb (struct ev_io *w, int revents)
957{
958 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
959}
960
961static void
962ocb (struct ev_timer *w, int revents)
963{
964 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
965 evtimer_stop (w);
966 evtimer_start (w);
967}
968
969static void
970scb (struct ev_signal *w, int revents)
971{
972 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
973 evio_stop (&wio);
974 evio_start (&wio);
975}
976
977static void
978gcb (struct ev_signal *w, int revents)
979{
980 fprintf (stderr, "generic %x\n", revents);
981
982}
983
984int main (void)
985{
986 ev_init (0);
987
988 evio_init (&wio, sin_cb, 0, EV_READ);
989 evio_start (&wio);
990
991 struct ev_timer t[10000];
992
993#if 0
994 int i;
995 for (i = 0; i < 10000; ++i)
996 { 2638 }
997 struct ev_timer *w = t + i;
998 evw_init (w, ocb, i);
999 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1000 evtimer_start (w);
1001 if (drand48 () < 0.5)
1002 evtimer_stop (w);
1003 }
1004#endif
1005
1006 struct ev_timer t1;
1007 evtimer_init (&t1, ocb, 5, 10);
1008 evtimer_start (&t1);
1009
1010 struct ev_signal sig;
1011 evsignal_init (&sig, scb, SIGQUIT);
1012 evsignal_start (&sig);
1013
1014 struct ev_check cw;
1015 evcheck_init (&cw, gcb);
1016 evcheck_start (&cw);
1017
1018 struct ev_idle iw;
1019 evidle_init (&iw, gcb);
1020 evidle_start (&iw);
1021
1022 ev_loop (0);
1023
1024 return 0;
1025} 2639}
1026 2640
2641#if EV_MULTIPLICITY
2642 #include "ev_wrap.h"
1027#endif 2643#endif
1028 2644
2645#ifdef __cplusplus
2646}
2647#endif
1029 2648
1030
1031

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